Greg Kroah-Hartman | 72dc1c0 | 2008-05-13 21:57:12 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Driver for Option High Speed Mobile Devices. |
| 4 | * |
| 5 | * Copyright (C) 2008 Option International |
| 6 | * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd) |
| 7 | * <ajb@spheresystems.co.uk> |
| 8 | * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> |
| 9 | * Copyright (C) 2008 Novell, Inc. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License version 2 as |
| 13 | * published by the Free Software Foundation. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| 23 | * USA |
| 24 | * |
| 25 | * |
| 26 | *****************************************************************************/ |
| 27 | |
| 28 | /****************************************************************************** |
| 29 | * |
| 30 | * Description of the device: |
| 31 | * |
| 32 | * Interface 0: Contains the IP network interface on the bulk end points. |
| 33 | * The multiplexed serial ports are using the interrupt and |
| 34 | * control endpoints. |
| 35 | * Interrupt contains a bitmap telling which multiplexed |
| 36 | * serialport needs servicing. |
| 37 | * |
| 38 | * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the |
| 39 | * port is opened, as this have a huge impact on the network port |
| 40 | * throughput. |
| 41 | * |
| 42 | * Interface 2: Standard modem interface - circuit switched interface, should |
| 43 | * not be used. |
| 44 | * |
| 45 | *****************************************************************************/ |
| 46 | |
| 47 | #include <linux/sched.h> |
| 48 | #include <linux/slab.h> |
| 49 | #include <linux/init.h> |
| 50 | #include <linux/delay.h> |
| 51 | #include <linux/netdevice.h> |
| 52 | #include <linux/module.h> |
| 53 | #include <linux/ethtool.h> |
| 54 | #include <linux/usb.h> |
| 55 | #include <linux/timer.h> |
| 56 | #include <linux/tty.h> |
| 57 | #include <linux/tty_driver.h> |
| 58 | #include <linux/tty_flip.h> |
| 59 | #include <linux/kmod.h> |
| 60 | #include <linux/rfkill.h> |
| 61 | #include <linux/ip.h> |
| 62 | #include <linux/uaccess.h> |
| 63 | #include <linux/usb/cdc.h> |
| 64 | #include <net/arp.h> |
| 65 | #include <asm/byteorder.h> |
| 66 | |
| 67 | |
| 68 | #define DRIVER_VERSION "1.2" |
| 69 | #define MOD_AUTHOR "Option Wireless" |
| 70 | #define MOD_DESCRIPTION "USB High Speed Option driver" |
| 71 | #define MOD_LICENSE "GPL" |
| 72 | |
| 73 | #define HSO_MAX_NET_DEVICES 10 |
| 74 | #define HSO__MAX_MTU 2048 |
| 75 | #define DEFAULT_MTU 1500 |
| 76 | #define DEFAULT_MRU 1500 |
| 77 | |
| 78 | #define CTRL_URB_RX_SIZE 1024 |
| 79 | #define CTRL_URB_TX_SIZE 64 |
| 80 | |
| 81 | #define BULK_URB_RX_SIZE 4096 |
| 82 | #define BULK_URB_TX_SIZE 8192 |
| 83 | |
| 84 | #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU |
| 85 | #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU |
| 86 | #define MUX_BULK_RX_BUF_COUNT 4 |
| 87 | #define USB_TYPE_OPTION_VENDOR 0x20 |
| 88 | |
| 89 | /* These definitions are used with the struct hso_net flags element */ |
| 90 | /* - use *_bit operations on it. (bit indices not values.) */ |
| 91 | #define HSO_NET_RUNNING 0 |
| 92 | |
| 93 | #define HSO_NET_TX_TIMEOUT (HZ*10) |
| 94 | |
| 95 | /* Serial port defines and structs. */ |
| 96 | #define HSO_SERIAL_FLAG_RX_SENT 0 |
| 97 | |
| 98 | #define HSO_SERIAL_MAGIC 0x48534f31 |
| 99 | |
| 100 | /* Number of ttys to handle */ |
| 101 | #define HSO_SERIAL_TTY_MINORS 256 |
| 102 | |
| 103 | #define MAX_RX_URBS 2 |
| 104 | |
| 105 | #define get_serial_by_tty(x) \ |
| 106 | (x ? (struct hso_serial *)x->driver_data : NULL) |
| 107 | |
| 108 | /*****************************************************************************/ |
| 109 | /* Debugging functions */ |
| 110 | /*****************************************************************************/ |
| 111 | #define D__(lvl_, fmt, arg...) \ |
| 112 | do { \ |
| 113 | printk(lvl_ "[%d:%s]: " fmt "\n", \ |
| 114 | __LINE__, __func__, ## arg); \ |
| 115 | } while (0) |
| 116 | |
| 117 | #define D_(lvl, args...) \ |
| 118 | do { \ |
| 119 | if (lvl & debug) \ |
| 120 | D__(KERN_INFO, args); \ |
| 121 | } while (0) |
| 122 | |
| 123 | #define D1(args...) D_(0x01, ##args) |
| 124 | #define D2(args...) D_(0x02, ##args) |
| 125 | #define D3(args...) D_(0x04, ##args) |
| 126 | #define D4(args...) D_(0x08, ##args) |
| 127 | #define D5(args...) D_(0x10, ##args) |
| 128 | |
| 129 | /*****************************************************************************/ |
| 130 | /* Enumerators */ |
| 131 | /*****************************************************************************/ |
| 132 | enum pkt_parse_state { |
| 133 | WAIT_IP, |
| 134 | WAIT_DATA, |
| 135 | WAIT_SYNC |
| 136 | }; |
| 137 | |
| 138 | /*****************************************************************************/ |
| 139 | /* Structs */ |
| 140 | /*****************************************************************************/ |
| 141 | |
| 142 | struct hso_shared_int { |
| 143 | struct usb_endpoint_descriptor *intr_endp; |
| 144 | void *shared_intr_buf; |
| 145 | struct urb *shared_intr_urb; |
| 146 | struct usb_device *usb; |
| 147 | int use_count; |
| 148 | int ref_count; |
| 149 | struct mutex shared_int_lock; |
| 150 | }; |
| 151 | |
| 152 | struct hso_net { |
| 153 | struct hso_device *parent; |
| 154 | struct net_device *net; |
| 155 | struct rfkill *rfkill; |
| 156 | |
| 157 | struct usb_endpoint_descriptor *in_endp; |
| 158 | struct usb_endpoint_descriptor *out_endp; |
| 159 | |
| 160 | struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; |
| 161 | struct urb *mux_bulk_tx_urb; |
| 162 | void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; |
| 163 | void *mux_bulk_tx_buf; |
| 164 | |
| 165 | struct sk_buff *skb_rx_buf; |
| 166 | struct sk_buff *skb_tx_buf; |
| 167 | |
| 168 | enum pkt_parse_state rx_parse_state; |
| 169 | spinlock_t net_lock; |
| 170 | |
| 171 | unsigned short rx_buf_size; |
| 172 | unsigned short rx_buf_missing; |
| 173 | struct iphdr rx_ip_hdr; |
| 174 | |
| 175 | unsigned long flags; |
| 176 | }; |
| 177 | |
| 178 | struct hso_serial { |
| 179 | struct hso_device *parent; |
| 180 | int magic; |
| 181 | u8 minor; |
| 182 | |
| 183 | struct hso_shared_int *shared_int; |
| 184 | |
| 185 | /* rx/tx urb could be either a bulk urb or a control urb depending |
| 186 | on which serial port it is used on. */ |
| 187 | struct urb *rx_urb[MAX_RX_URBS]; |
| 188 | u8 num_rx_urbs; |
| 189 | u8 *rx_data[MAX_RX_URBS]; |
| 190 | u16 rx_data_length; /* should contain allocated length */ |
| 191 | |
| 192 | struct urb *tx_urb; |
| 193 | u8 *tx_data; |
| 194 | u8 *tx_buffer; |
| 195 | u16 tx_data_length; /* should contain allocated length */ |
| 196 | u16 tx_data_count; |
| 197 | u16 tx_buffer_count; |
| 198 | struct usb_ctrlrequest ctrl_req_tx; |
| 199 | struct usb_ctrlrequest ctrl_req_rx; |
| 200 | |
| 201 | struct usb_endpoint_descriptor *in_endp; |
| 202 | struct usb_endpoint_descriptor *out_endp; |
| 203 | |
| 204 | unsigned long flags; |
| 205 | u8 rts_state; |
| 206 | u8 dtr_state; |
| 207 | unsigned tx_urb_used:1; |
| 208 | |
| 209 | /* from usb_serial_port */ |
| 210 | struct tty_struct *tty; |
| 211 | int open_count; |
| 212 | spinlock_t serial_lock; |
| 213 | |
| 214 | int (*write_data) (struct hso_serial *serial); |
| 215 | }; |
| 216 | |
| 217 | struct hso_device { |
| 218 | union { |
| 219 | struct hso_serial *dev_serial; |
| 220 | struct hso_net *dev_net; |
| 221 | } port_data; |
| 222 | |
| 223 | u32 port_spec; |
| 224 | |
| 225 | u8 is_active; |
| 226 | u8 usb_gone; |
| 227 | struct work_struct async_get_intf; |
| 228 | struct work_struct async_put_intf; |
| 229 | |
| 230 | struct usb_device *usb; |
| 231 | struct usb_interface *interface; |
| 232 | |
| 233 | struct device *dev; |
| 234 | struct kref ref; |
| 235 | struct mutex mutex; |
| 236 | }; |
| 237 | |
| 238 | /* Type of interface */ |
| 239 | #define HSO_INTF_MASK 0xFF00 |
| 240 | #define HSO_INTF_MUX 0x0100 |
| 241 | #define HSO_INTF_BULK 0x0200 |
| 242 | |
| 243 | /* Type of port */ |
| 244 | #define HSO_PORT_MASK 0xFF |
| 245 | #define HSO_PORT_NO_PORT 0x0 |
| 246 | #define HSO_PORT_CONTROL 0x1 |
| 247 | #define HSO_PORT_APP 0x2 |
| 248 | #define HSO_PORT_GPS 0x3 |
| 249 | #define HSO_PORT_PCSC 0x4 |
| 250 | #define HSO_PORT_APP2 0x5 |
| 251 | #define HSO_PORT_GPS_CONTROL 0x6 |
| 252 | #define HSO_PORT_MSD 0x7 |
| 253 | #define HSO_PORT_VOICE 0x8 |
| 254 | #define HSO_PORT_DIAG2 0x9 |
| 255 | #define HSO_PORT_DIAG 0x10 |
| 256 | #define HSO_PORT_MODEM 0x11 |
| 257 | #define HSO_PORT_NETWORK 0x12 |
| 258 | |
| 259 | /* Additional device info */ |
| 260 | #define HSO_INFO_MASK 0xFF000000 |
| 261 | #define HSO_INFO_CRC_BUG 0x01000000 |
| 262 | |
| 263 | /*****************************************************************************/ |
| 264 | /* Prototypes */ |
| 265 | /*****************************************************************************/ |
| 266 | /* Serial driver functions */ |
| 267 | static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, |
| 268 | unsigned int set, unsigned int clear); |
| 269 | static void ctrl_callback(struct urb *urb); |
| 270 | static void put_rxbuf_data(struct urb *urb, struct hso_serial *serial); |
| 271 | static void hso_kick_transmit(struct hso_serial *serial); |
| 272 | /* Helper functions */ |
| 273 | static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, |
| 274 | struct usb_device *usb, gfp_t gfp); |
| 275 | static void log_usb_status(int status, const char *function); |
| 276 | static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, |
| 277 | int type, int dir); |
| 278 | static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); |
| 279 | static void hso_free_interface(struct usb_interface *intf); |
| 280 | static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); |
| 281 | static int hso_stop_serial_device(struct hso_device *hso_dev); |
| 282 | static int hso_start_net_device(struct hso_device *hso_dev); |
| 283 | static void hso_free_shared_int(struct hso_shared_int *shared_int); |
| 284 | static int hso_stop_net_device(struct hso_device *hso_dev); |
| 285 | static void hso_serial_ref_free(struct kref *ref); |
| 286 | static void async_get_intf(struct work_struct *data); |
| 287 | static void async_put_intf(struct work_struct *data); |
| 288 | static int hso_put_activity(struct hso_device *hso_dev); |
| 289 | static int hso_get_activity(struct hso_device *hso_dev); |
| 290 | |
| 291 | /*****************************************************************************/ |
| 292 | /* Helping functions */ |
| 293 | /*****************************************************************************/ |
| 294 | |
| 295 | /* #define DEBUG */ |
| 296 | |
| 297 | #define dev2net(x) (x->port_data.dev_net) |
| 298 | #define dev2ser(x) (x->port_data.dev_serial) |
| 299 | |
| 300 | /* Debugging functions */ |
| 301 | #ifdef DEBUG |
| 302 | static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, |
| 303 | unsigned int len) |
| 304 | { |
| 305 | u8 i = 0; |
| 306 | |
| 307 | printk(KERN_DEBUG "[%d:%s]: len %d", line_count, func_name, len); |
| 308 | |
| 309 | for (i = 0; i < len; i++) { |
| 310 | if (!(i % 16)) |
| 311 | printk("\n 0x%03x: ", i); |
| 312 | printk("%02x ", (unsigned char)buf[i]); |
| 313 | } |
| 314 | printk("\n"); |
| 315 | } |
| 316 | |
| 317 | #define DUMP(buf_, len_) \ |
| 318 | dbg_dump(__LINE__, __func__, buf_, len_) |
| 319 | |
| 320 | #define DUMP1(buf_, len_) \ |
| 321 | do { \ |
| 322 | if (0x01 & debug) \ |
| 323 | DUMP(buf_, len_); \ |
| 324 | } while (0) |
| 325 | #else |
| 326 | #define DUMP(buf_, len_) |
| 327 | #define DUMP1(buf_, len_) |
| 328 | #endif |
| 329 | |
| 330 | /* module parameters */ |
| 331 | static int debug; |
| 332 | static int tty_major; |
| 333 | static int disable_net; |
| 334 | |
| 335 | /* driver info */ |
| 336 | static const char driver_name[] = "hso"; |
| 337 | static const char tty_filename[] = "ttyHS"; |
| 338 | static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR; |
| 339 | /* the usb driver itself (registered in hso_init) */ |
| 340 | static struct usb_driver hso_driver; |
| 341 | /* serial structures */ |
| 342 | static struct tty_driver *tty_drv; |
| 343 | static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; |
| 344 | static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; |
| 345 | static spinlock_t serial_table_lock; |
| 346 | static struct ktermios *hso_serial_termios[HSO_SERIAL_TTY_MINORS]; |
| 347 | static struct ktermios *hso_serial_termios_locked[HSO_SERIAL_TTY_MINORS]; |
| 348 | |
| 349 | static const s32 default_port_spec[] = { |
| 350 | HSO_INTF_MUX | HSO_PORT_NETWORK, |
| 351 | HSO_INTF_BULK | HSO_PORT_DIAG, |
| 352 | HSO_INTF_BULK | HSO_PORT_MODEM, |
| 353 | 0 |
| 354 | }; |
| 355 | |
| 356 | static const s32 icon321_port_spec[] = { |
| 357 | HSO_INTF_MUX | HSO_PORT_NETWORK, |
| 358 | HSO_INTF_BULK | HSO_PORT_DIAG2, |
| 359 | HSO_INTF_BULK | HSO_PORT_MODEM, |
| 360 | HSO_INTF_BULK | HSO_PORT_DIAG, |
| 361 | 0 |
| 362 | }; |
| 363 | |
| 364 | #define default_port_device(vendor, product) \ |
| 365 | USB_DEVICE(vendor, product), \ |
| 366 | .driver_info = (kernel_ulong_t)default_port_spec |
| 367 | |
| 368 | #define icon321_port_device(vendor, product) \ |
| 369 | USB_DEVICE(vendor, product), \ |
| 370 | .driver_info = (kernel_ulong_t)icon321_port_spec |
| 371 | |
| 372 | /* list of devices we support */ |
| 373 | static const struct usb_device_id hso_ids[] = { |
| 374 | {default_port_device(0x0af0, 0x6711)}, |
| 375 | {default_port_device(0x0af0, 0x6731)}, |
| 376 | {default_port_device(0x0af0, 0x6751)}, |
| 377 | {default_port_device(0x0af0, 0x6771)}, |
| 378 | {default_port_device(0x0af0, 0x6791)}, |
| 379 | {default_port_device(0x0af0, 0x6811)}, |
| 380 | {default_port_device(0x0af0, 0x6911)}, |
| 381 | {default_port_device(0x0af0, 0x6951)}, |
| 382 | {default_port_device(0x0af0, 0x6971)}, |
| 383 | {default_port_device(0x0af0, 0x7011)}, |
| 384 | {default_port_device(0x0af0, 0x7031)}, |
| 385 | {default_port_device(0x0af0, 0x7051)}, |
| 386 | {default_port_device(0x0af0, 0x7071)}, |
| 387 | {default_port_device(0x0af0, 0x7111)}, |
| 388 | {default_port_device(0x0af0, 0x7211)}, |
| 389 | {default_port_device(0x0af0, 0x7251)}, |
| 390 | {default_port_device(0x0af0, 0x7271)}, |
| 391 | {default_port_device(0x0af0, 0x7311)}, |
| 392 | {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ |
| 393 | {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ |
| 394 | {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ |
| 395 | {default_port_device(0x0af0, 0xd033)}, /* Icon-322 */ |
| 396 | {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ |
| 397 | {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ |
| 398 | {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ |
| 399 | {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ |
| 400 | {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ |
| 401 | {} |
| 402 | }; |
| 403 | MODULE_DEVICE_TABLE(usb, hso_ids); |
| 404 | |
| 405 | /* Sysfs attribute */ |
| 406 | static ssize_t hso_sysfs_show_porttype(struct device *dev, |
| 407 | struct device_attribute *attr, |
| 408 | char *buf) |
| 409 | { |
| 410 | struct hso_device *hso_dev = dev->driver_data; |
| 411 | char *port_name; |
| 412 | |
| 413 | if (!hso_dev) |
| 414 | return 0; |
| 415 | |
| 416 | switch (hso_dev->port_spec & HSO_PORT_MASK) { |
| 417 | case HSO_PORT_CONTROL: |
| 418 | port_name = "Control"; |
| 419 | break; |
| 420 | case HSO_PORT_APP: |
| 421 | port_name = "Application"; |
| 422 | break; |
| 423 | case HSO_PORT_APP2: |
| 424 | port_name = "Application2"; |
| 425 | break; |
| 426 | case HSO_PORT_GPS: |
| 427 | port_name = "GPS"; |
| 428 | break; |
| 429 | case HSO_PORT_GPS_CONTROL: |
| 430 | port_name = "GPS Control"; |
| 431 | break; |
| 432 | case HSO_PORT_PCSC: |
| 433 | port_name = "PCSC"; |
| 434 | break; |
| 435 | case HSO_PORT_DIAG: |
| 436 | port_name = "Diagnostic"; |
| 437 | break; |
| 438 | case HSO_PORT_DIAG2: |
| 439 | port_name = "Diagnostic2"; |
| 440 | break; |
| 441 | case HSO_PORT_MODEM: |
| 442 | port_name = "Modem"; |
| 443 | break; |
| 444 | case HSO_PORT_NETWORK: |
| 445 | port_name = "Network"; |
| 446 | break; |
| 447 | default: |
| 448 | port_name = "Unknown"; |
| 449 | break; |
| 450 | } |
| 451 | |
| 452 | return sprintf(buf, "%s\n", port_name); |
| 453 | } |
| 454 | static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); |
| 455 | |
| 456 | /* converts mux value to a port spec value */ |
| 457 | static u32 hso_mux_to_port(int mux) |
| 458 | { |
| 459 | u32 result; |
| 460 | |
| 461 | switch (mux) { |
| 462 | case 0x1: |
| 463 | result = HSO_PORT_CONTROL; |
| 464 | break; |
| 465 | case 0x2: |
| 466 | result = HSO_PORT_APP; |
| 467 | break; |
| 468 | case 0x4: |
| 469 | result = HSO_PORT_PCSC; |
| 470 | break; |
| 471 | case 0x8: |
| 472 | result = HSO_PORT_GPS; |
| 473 | break; |
| 474 | case 0x10: |
| 475 | result = HSO_PORT_APP2; |
| 476 | break; |
| 477 | default: |
| 478 | result = HSO_PORT_NO_PORT; |
| 479 | } |
| 480 | return result; |
| 481 | } |
| 482 | |
| 483 | /* converts port spec value to a mux value */ |
| 484 | static u32 hso_port_to_mux(int port) |
| 485 | { |
| 486 | u32 result; |
| 487 | |
| 488 | switch (port & HSO_PORT_MASK) { |
| 489 | case HSO_PORT_CONTROL: |
| 490 | result = 0x0; |
| 491 | break; |
| 492 | case HSO_PORT_APP: |
| 493 | result = 0x1; |
| 494 | break; |
| 495 | case HSO_PORT_PCSC: |
| 496 | result = 0x2; |
| 497 | break; |
| 498 | case HSO_PORT_GPS: |
| 499 | result = 0x3; |
| 500 | break; |
| 501 | case HSO_PORT_APP2: |
| 502 | result = 0x4; |
| 503 | break; |
| 504 | default: |
| 505 | result = 0x0; |
| 506 | } |
| 507 | return result; |
| 508 | } |
| 509 | |
| 510 | static struct hso_serial *get_serial_by_shared_int_and_type( |
| 511 | struct hso_shared_int *shared_int, |
| 512 | int mux) |
| 513 | { |
| 514 | int i, port; |
| 515 | |
| 516 | port = hso_mux_to_port(mux); |
| 517 | |
| 518 | for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { |
| 519 | if (serial_table[i] |
| 520 | && (dev2ser(serial_table[i])->shared_int == shared_int) |
| 521 | && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { |
| 522 | return dev2ser(serial_table[i]); |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | return NULL; |
| 527 | } |
| 528 | |
| 529 | static struct hso_serial *get_serial_by_index(unsigned index) |
| 530 | { |
| 531 | struct hso_serial *serial; |
| 532 | unsigned long flags; |
| 533 | |
| 534 | if (!serial_table[index]) |
| 535 | return NULL; |
| 536 | spin_lock_irqsave(&serial_table_lock, flags); |
| 537 | serial = dev2ser(serial_table[index]); |
| 538 | spin_unlock_irqrestore(&serial_table_lock, flags); |
| 539 | |
| 540 | return serial; |
| 541 | } |
| 542 | |
| 543 | static int get_free_serial_index(void) |
| 544 | { |
| 545 | int index; |
| 546 | unsigned long flags; |
| 547 | |
| 548 | spin_lock_irqsave(&serial_table_lock, flags); |
| 549 | for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { |
| 550 | if (serial_table[index] == NULL) { |
| 551 | spin_unlock_irqrestore(&serial_table_lock, flags); |
| 552 | return index; |
| 553 | } |
| 554 | } |
| 555 | spin_unlock_irqrestore(&serial_table_lock, flags); |
| 556 | |
| 557 | printk(KERN_ERR "%s: no free serial devices in table\n", __func__); |
| 558 | return -1; |
| 559 | } |
| 560 | |
| 561 | static void set_serial_by_index(unsigned index, struct hso_serial *serial) |
| 562 | { |
| 563 | unsigned long flags; |
| 564 | spin_lock_irqsave(&serial_table_lock, flags); |
| 565 | if (serial) |
| 566 | serial_table[index] = serial->parent; |
| 567 | else |
| 568 | serial_table[index] = NULL; |
| 569 | spin_unlock_irqrestore(&serial_table_lock, flags); |
| 570 | } |
| 571 | |
| 572 | /* log a meaningfull explanation of an USB status */ |
| 573 | static void log_usb_status(int status, const char *function) |
| 574 | { |
| 575 | char *explanation; |
| 576 | |
| 577 | switch (status) { |
| 578 | case -ENODEV: |
| 579 | explanation = "no device"; |
| 580 | break; |
| 581 | case -ENOENT: |
| 582 | explanation = "endpoint not enabled"; |
| 583 | break; |
| 584 | case -EPIPE: |
| 585 | explanation = "endpoint stalled"; |
| 586 | break; |
| 587 | case -ENOSPC: |
| 588 | explanation = "not enough bandwidth"; |
| 589 | break; |
| 590 | case -ESHUTDOWN: |
| 591 | explanation = "device disabled"; |
| 592 | break; |
| 593 | case -EHOSTUNREACH: |
| 594 | explanation = "device suspended"; |
| 595 | break; |
| 596 | case -EINVAL: |
| 597 | case -EAGAIN: |
| 598 | case -EFBIG: |
| 599 | case -EMSGSIZE: |
| 600 | explanation = "internal error"; |
| 601 | break; |
| 602 | default: |
| 603 | explanation = "unknown status"; |
| 604 | break; |
| 605 | } |
| 606 | D1("%s: received USB status - %s (%d)", function, explanation, status); |
| 607 | } |
| 608 | |
| 609 | /* Network interface functions */ |
| 610 | |
| 611 | /* called when net interface is brought up by ifconfig */ |
| 612 | static int hso_net_open(struct net_device *net) |
| 613 | { |
| 614 | struct hso_net *odev = netdev_priv(net); |
| 615 | unsigned long flags = 0; |
| 616 | |
| 617 | if (!odev) { |
| 618 | dev_err(&net->dev, "No net device !\n"); |
| 619 | return -ENODEV; |
| 620 | } |
| 621 | |
| 622 | odev->skb_tx_buf = NULL; |
| 623 | |
| 624 | /* setup environment */ |
| 625 | spin_lock_irqsave(&odev->net_lock, flags); |
| 626 | odev->rx_parse_state = WAIT_IP; |
| 627 | odev->rx_buf_size = 0; |
| 628 | odev->rx_buf_missing = sizeof(struct iphdr); |
| 629 | spin_unlock_irqrestore(&odev->net_lock, flags); |
| 630 | |
| 631 | hso_start_net_device(odev->parent); |
| 632 | |
| 633 | /* We are up and running. */ |
| 634 | set_bit(HSO_NET_RUNNING, &odev->flags); |
| 635 | |
| 636 | /* Tell the kernel we are ready to start receiving from it */ |
| 637 | netif_start_queue(net); |
| 638 | |
| 639 | return 0; |
| 640 | } |
| 641 | |
| 642 | /* called when interface is brought down by ifconfig */ |
| 643 | static int hso_net_close(struct net_device *net) |
| 644 | { |
| 645 | struct hso_net *odev = netdev_priv(net); |
| 646 | |
| 647 | /* we don't need the queue anymore */ |
| 648 | netif_stop_queue(net); |
| 649 | /* no longer running */ |
| 650 | clear_bit(HSO_NET_RUNNING, &odev->flags); |
| 651 | |
| 652 | hso_stop_net_device(odev->parent); |
| 653 | |
| 654 | /* done */ |
| 655 | return 0; |
| 656 | } |
| 657 | |
| 658 | /* USB tells is xmit done, we should start the netqueue again */ |
| 659 | static void write_bulk_callback(struct urb *urb) |
| 660 | { |
| 661 | struct hso_net *odev = urb->context; |
| 662 | int status = urb->status; |
| 663 | |
| 664 | /* Sanity check */ |
| 665 | if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { |
| 666 | dev_err(&urb->dev->dev, "%s: device not running\n", __func__); |
| 667 | return; |
| 668 | } |
| 669 | |
| 670 | /* Do we still have a valid kernel network device? */ |
| 671 | if (!netif_device_present(odev->net)) { |
| 672 | dev_err(&urb->dev->dev, "%s: net device not present\n", |
| 673 | __func__); |
| 674 | return; |
| 675 | } |
| 676 | |
| 677 | /* log status, but don't act on it, we don't need to resubmit anything |
| 678 | * anyhow */ |
| 679 | if (status) |
| 680 | log_usb_status(status, __func__); |
| 681 | |
| 682 | hso_put_activity(odev->parent); |
| 683 | |
| 684 | /* Tell the network interface we are ready for another frame */ |
| 685 | netif_wake_queue(odev->net); |
| 686 | } |
| 687 | |
| 688 | /* called by kernel when we need to transmit a packet */ |
| 689 | static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net) |
| 690 | { |
| 691 | struct hso_net *odev = netdev_priv(net); |
| 692 | int result; |
| 693 | |
| 694 | /* Tell the kernel, "No more frames 'til we are done with this one." */ |
| 695 | netif_stop_queue(net); |
| 696 | if (hso_get_activity(odev->parent) == -EAGAIN) { |
| 697 | odev->skb_tx_buf = skb; |
| 698 | return 0; |
| 699 | } |
| 700 | |
| 701 | /* log if asked */ |
| 702 | DUMP1(skb->data, skb->len); |
| 703 | /* Copy it from kernel memory to OUR memory */ |
| 704 | memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); |
| 705 | D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE); |
| 706 | |
| 707 | /* Fill in the URB for shipping it out. */ |
| 708 | usb_fill_bulk_urb(odev->mux_bulk_tx_urb, |
| 709 | odev->parent->usb, |
| 710 | usb_sndbulkpipe(odev->parent->usb, |
| 711 | odev->out_endp-> |
| 712 | bEndpointAddress & 0x7F), |
| 713 | odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, |
| 714 | odev); |
| 715 | |
| 716 | /* Deal with the Zero Length packet problem, I hope */ |
| 717 | odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; |
| 718 | |
| 719 | /* Send the URB on its merry way. */ |
| 720 | result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); |
| 721 | if (result) { |
| 722 | dev_warn(&odev->parent->interface->dev, |
| 723 | "failed mux_bulk_tx_urb %d", result); |
| 724 | net->stats.tx_errors++; |
| 725 | netif_start_queue(net); |
| 726 | } else { |
| 727 | net->stats.tx_packets++; |
| 728 | net->stats.tx_bytes += skb->len; |
| 729 | /* And tell the kernel when the last transmit started. */ |
| 730 | net->trans_start = jiffies; |
| 731 | } |
| 732 | dev_kfree_skb(skb); |
| 733 | /* we're done */ |
| 734 | return result; |
| 735 | } |
| 736 | |
| 737 | static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info) |
| 738 | { |
| 739 | struct hso_net *odev = netdev_priv(net); |
| 740 | |
| 741 | strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN); |
| 742 | strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN); |
| 743 | usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info); |
| 744 | } |
| 745 | |
| 746 | static struct ethtool_ops ops = { |
| 747 | .get_drvinfo = hso_get_drvinfo, |
| 748 | .get_link = ethtool_op_get_link |
| 749 | }; |
| 750 | |
| 751 | /* called when a packet did not ack after watchdogtimeout */ |
| 752 | static void hso_net_tx_timeout(struct net_device *net) |
| 753 | { |
| 754 | struct hso_net *odev = netdev_priv(net); |
| 755 | |
| 756 | if (!odev) |
| 757 | return; |
| 758 | |
| 759 | /* Tell syslog we are hosed. */ |
| 760 | dev_warn(&net->dev, "Tx timed out.\n"); |
| 761 | |
| 762 | /* Tear the waiting frame off the list */ |
| 763 | if (odev->mux_bulk_tx_urb |
| 764 | && (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) |
| 765 | usb_unlink_urb(odev->mux_bulk_tx_urb); |
| 766 | |
| 767 | /* Update statistics */ |
| 768 | net->stats.tx_errors++; |
| 769 | } |
| 770 | |
| 771 | /* make a real packet from the received USB buffer */ |
| 772 | static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, |
| 773 | unsigned int count, unsigned char is_eop) |
| 774 | { |
| 775 | unsigned short temp_bytes; |
| 776 | unsigned short buffer_offset = 0; |
| 777 | unsigned short frame_len; |
| 778 | unsigned char *tmp_rx_buf; |
| 779 | |
| 780 | /* log if needed */ |
| 781 | D1("Rx %d bytes", count); |
| 782 | DUMP(ip_pkt, min(128, (int)count)); |
| 783 | |
| 784 | while (count) { |
| 785 | switch (odev->rx_parse_state) { |
| 786 | case WAIT_IP: |
| 787 | /* waiting for IP header. */ |
| 788 | /* wanted bytes - size of ip header */ |
| 789 | temp_bytes = |
| 790 | (count < |
| 791 | odev->rx_buf_missing) ? count : odev-> |
| 792 | rx_buf_missing; |
| 793 | |
| 794 | memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + |
| 795 | odev->rx_buf_size, ip_pkt + buffer_offset, |
| 796 | temp_bytes); |
| 797 | |
| 798 | odev->rx_buf_size += temp_bytes; |
| 799 | buffer_offset += temp_bytes; |
| 800 | odev->rx_buf_missing -= temp_bytes; |
| 801 | count -= temp_bytes; |
| 802 | |
| 803 | if (!odev->rx_buf_missing) { |
| 804 | /* header is complete allocate an sk_buffer and |
| 805 | * continue to WAIT_DATA */ |
| 806 | frame_len = ntohs(odev->rx_ip_hdr.tot_len); |
| 807 | |
| 808 | if ((frame_len > DEFAULT_MRU) || |
| 809 | (frame_len < sizeof(struct iphdr))) { |
| 810 | dev_err(&odev->net->dev, |
| 811 | "Invalid frame (%d) length\n", |
| 812 | frame_len); |
| 813 | odev->rx_parse_state = WAIT_SYNC; |
| 814 | continue; |
| 815 | } |
| 816 | /* Allocate an sk_buff */ |
| 817 | odev->skb_rx_buf = dev_alloc_skb(frame_len); |
| 818 | if (!odev->skb_rx_buf) { |
| 819 | /* We got no receive buffer. */ |
| 820 | D1("could not allocate memory"); |
| 821 | odev->rx_parse_state = WAIT_SYNC; |
| 822 | return; |
| 823 | } |
| 824 | /* Here's where it came from */ |
| 825 | odev->skb_rx_buf->dev = odev->net; |
| 826 | |
| 827 | /* Copy what we got so far. make room for iphdr |
| 828 | * after tail. */ |
| 829 | tmp_rx_buf = |
| 830 | skb_put(odev->skb_rx_buf, |
| 831 | sizeof(struct iphdr)); |
| 832 | memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr), |
| 833 | sizeof(struct iphdr)); |
| 834 | |
| 835 | /* ETH_HLEN */ |
| 836 | odev->rx_buf_size = sizeof(struct iphdr); |
| 837 | |
| 838 | /* Filip actually use .tot_len */ |
| 839 | odev->rx_buf_missing = |
| 840 | frame_len - sizeof(struct iphdr); |
| 841 | odev->rx_parse_state = WAIT_DATA; |
| 842 | } |
| 843 | break; |
| 844 | |
| 845 | case WAIT_DATA: |
| 846 | temp_bytes = (count < odev->rx_buf_missing) |
| 847 | ? count : odev->rx_buf_missing; |
| 848 | |
| 849 | /* Copy the rest of the bytes that are left in the |
| 850 | * buffer into the waiting sk_buf. */ |
| 851 | /* Make room for temp_bytes after tail. */ |
| 852 | tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes); |
| 853 | memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes); |
| 854 | |
| 855 | odev->rx_buf_missing -= temp_bytes; |
| 856 | count -= temp_bytes; |
| 857 | buffer_offset += temp_bytes; |
| 858 | odev->rx_buf_size += temp_bytes; |
| 859 | if (!odev->rx_buf_missing) { |
| 860 | /* Packet is complete. Inject into stack. */ |
| 861 | /* We have IP packet here */ |
| 862 | odev->skb_rx_buf->protocol = |
| 863 | __constant_htons(ETH_P_IP); |
| 864 | /* don't check it */ |
| 865 | odev->skb_rx_buf->ip_summed = |
| 866 | CHECKSUM_UNNECESSARY; |
| 867 | |
| 868 | skb_reset_mac_header(odev->skb_rx_buf); |
| 869 | |
| 870 | /* Ship it off to the kernel */ |
| 871 | netif_rx(odev->skb_rx_buf); |
| 872 | /* No longer our buffer. */ |
| 873 | odev->skb_rx_buf = NULL; |
| 874 | |
| 875 | /* update out statistics */ |
| 876 | odev->net->stats.rx_packets++; |
| 877 | |
| 878 | odev->net->stats.rx_bytes += odev->rx_buf_size; |
| 879 | |
| 880 | odev->rx_buf_size = 0; |
| 881 | odev->rx_buf_missing = sizeof(struct iphdr); |
| 882 | odev->rx_parse_state = WAIT_IP; |
| 883 | } |
| 884 | break; |
| 885 | |
| 886 | case WAIT_SYNC: |
| 887 | D1(" W_S"); |
| 888 | count = 0; |
| 889 | break; |
| 890 | default: |
| 891 | D1(" "); |
| 892 | count--; |
| 893 | break; |
| 894 | } |
| 895 | } |
| 896 | |
| 897 | /* Recovery mechanism for WAIT_SYNC state. */ |
| 898 | if (is_eop) { |
| 899 | if (odev->rx_parse_state == WAIT_SYNC) { |
| 900 | odev->rx_parse_state = WAIT_IP; |
| 901 | odev->rx_buf_size = 0; |
| 902 | odev->rx_buf_missing = sizeof(struct iphdr); |
| 903 | } |
| 904 | } |
| 905 | } |
| 906 | |
| 907 | /* Moving data from usb to kernel (in interrupt state) */ |
| 908 | static void read_bulk_callback(struct urb *urb) |
| 909 | { |
| 910 | struct hso_net *odev = urb->context; |
| 911 | struct net_device *net; |
| 912 | int result; |
| 913 | int status = urb->status; |
| 914 | |
| 915 | /* is al ok? (Filip: Who's Al ?) */ |
| 916 | if (status) { |
| 917 | log_usb_status(status, __func__); |
| 918 | return; |
| 919 | } |
| 920 | |
| 921 | /* Sanity check */ |
| 922 | if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { |
| 923 | D1("BULK IN callback but driver is not active!"); |
| 924 | return; |
| 925 | } |
| 926 | usb_mark_last_busy(urb->dev); |
| 927 | |
| 928 | net = odev->net; |
| 929 | |
| 930 | if (!netif_device_present(net)) { |
| 931 | /* Somebody killed our network interface... */ |
| 932 | return; |
| 933 | } |
| 934 | |
| 935 | if (odev->parent->port_spec & HSO_INFO_CRC_BUG) { |
| 936 | u32 rest; |
| 937 | u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; |
| 938 | rest = urb->actual_length % odev->in_endp->wMaxPacketSize; |
| 939 | if (((rest == 5) || (rest == 6)) |
| 940 | && !memcmp(((u8 *) urb->transfer_buffer) + |
| 941 | urb->actual_length - 4, crc_check, 4)) { |
| 942 | urb->actual_length -= 4; |
| 943 | } |
| 944 | } |
| 945 | |
| 946 | /* do we even have a packet? */ |
| 947 | if (urb->actual_length) { |
| 948 | /* Handle the IP stream, add header and push it onto network |
| 949 | * stack if the packet is complete. */ |
| 950 | spin_lock(&odev->net_lock); |
| 951 | packetizeRx(odev, urb->transfer_buffer, urb->actual_length, |
| 952 | (urb->transfer_buffer_length > |
| 953 | urb->actual_length) ? 1 : 0); |
| 954 | spin_unlock(&odev->net_lock); |
| 955 | } |
| 956 | |
| 957 | /* We are done with this URB, resubmit it. Prep the USB to wait for |
| 958 | * another frame. Reuse same as received. */ |
| 959 | usb_fill_bulk_urb(urb, |
| 960 | odev->parent->usb, |
| 961 | usb_rcvbulkpipe(odev->parent->usb, |
| 962 | odev->in_endp-> |
| 963 | bEndpointAddress & 0x7F), |
| 964 | urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, |
| 965 | read_bulk_callback, odev); |
| 966 | |
| 967 | /* Give this to the USB subsystem so it can tell us when more data |
| 968 | * arrives. */ |
| 969 | result = usb_submit_urb(urb, GFP_ATOMIC); |
| 970 | if (result) |
| 971 | dev_warn(&odev->parent->interface->dev, |
| 972 | "%s failed submit mux_bulk_rx_urb %d", __func__, |
| 973 | result); |
| 974 | } |
| 975 | |
| 976 | /* Serial driver functions */ |
| 977 | |
| 978 | static void _hso_serial_set_termios(struct tty_struct *tty, |
| 979 | struct ktermios *old) |
| 980 | { |
| 981 | struct hso_serial *serial = get_serial_by_tty(tty); |
| 982 | struct ktermios *termios; |
| 983 | |
| 984 | if ((!tty) || (!tty->termios) || (!serial)) { |
| 985 | printk(KERN_ERR "%s: no tty structures", __func__); |
| 986 | return; |
| 987 | } |
| 988 | |
| 989 | D4("port %d", serial->minor); |
| 990 | |
| 991 | /* |
| 992 | * The default requirements for this device are: |
| 993 | */ |
| 994 | termios = tty->termios; |
| 995 | termios->c_iflag &= |
| 996 | ~(IGNBRK /* disable ignore break */ |
| 997 | | BRKINT /* disable break causes interrupt */ |
| 998 | | PARMRK /* disable mark parity errors */ |
| 999 | | ISTRIP /* disable clear high bit of input characters */ |
| 1000 | | INLCR /* disable translate NL to CR */ |
| 1001 | | IGNCR /* disable ignore CR */ |
| 1002 | | ICRNL /* disable translate CR to NL */ |
| 1003 | | IXON); /* disable enable XON/XOFF flow control */ |
| 1004 | |
| 1005 | /* disable postprocess output characters */ |
| 1006 | termios->c_oflag &= ~OPOST; |
| 1007 | |
| 1008 | termios->c_lflag &= |
| 1009 | ~(ECHO /* disable echo input characters */ |
| 1010 | | ECHONL /* disable echo new line */ |
| 1011 | | ICANON /* disable erase, kill, werase, and rprnt |
| 1012 | special characters */ |
| 1013 | | ISIG /* disable interrupt, quit, and suspend special |
| 1014 | characters */ |
| 1015 | | IEXTEN); /* disable non-POSIX special characters */ |
| 1016 | |
| 1017 | termios->c_cflag &= |
| 1018 | ~(CSIZE /* no size */ |
| 1019 | | PARENB /* disable parity bit */ |
| 1020 | | CBAUD /* clear current baud rate */ |
| 1021 | | CBAUDEX); /* clear current buad rate */ |
| 1022 | |
| 1023 | termios->c_cflag |= CS8; /* character size 8 bits */ |
| 1024 | |
| 1025 | /* baud rate 115200 */ |
| 1026 | tty_encode_baud_rate(serial->tty, 115200, 115200); |
| 1027 | |
| 1028 | /* |
| 1029 | * Force low_latency on; otherwise the pushes are scheduled; |
| 1030 | * this is bad as it opens up the possibility of dropping bytes |
| 1031 | * on the floor. We don't want to drop bytes on the floor. :) |
| 1032 | */ |
| 1033 | serial->tty->low_latency = 1; |
| 1034 | return; |
| 1035 | } |
| 1036 | |
| 1037 | /* open the requested serial port */ |
| 1038 | static int hso_serial_open(struct tty_struct *tty, struct file *filp) |
| 1039 | { |
| 1040 | struct hso_serial *serial = get_serial_by_index(tty->index); |
| 1041 | int result; |
| 1042 | |
| 1043 | /* sanity check */ |
| 1044 | if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { |
| 1045 | tty->driver_data = NULL; |
| 1046 | D1("Failed to open port"); |
| 1047 | return -ENODEV; |
| 1048 | } |
| 1049 | |
| 1050 | mutex_lock(&serial->parent->mutex); |
| 1051 | result = usb_autopm_get_interface(serial->parent->interface); |
| 1052 | if (result < 0) |
| 1053 | goto err_out; |
| 1054 | |
| 1055 | D1("Opening %d", serial->minor); |
| 1056 | kref_get(&serial->parent->ref); |
| 1057 | |
| 1058 | /* setup */ |
| 1059 | tty->driver_data = serial; |
| 1060 | serial->tty = tty; |
| 1061 | |
| 1062 | /* check for port allready opened, if not set the termios */ |
| 1063 | serial->open_count++; |
| 1064 | if (serial->open_count == 1) { |
| 1065 | tty->low_latency = 1; |
| 1066 | serial->flags = 0; |
| 1067 | /* Force default termio settings */ |
| 1068 | _hso_serial_set_termios(tty, NULL); |
| 1069 | result = hso_start_serial_device(serial->parent, GFP_KERNEL); |
| 1070 | if (result) { |
| 1071 | hso_stop_serial_device(serial->parent); |
| 1072 | serial->open_count--; |
| 1073 | kref_put(&serial->parent->ref, hso_serial_ref_free); |
| 1074 | } |
| 1075 | } else { |
| 1076 | D1("Port was already open"); |
| 1077 | } |
| 1078 | |
| 1079 | usb_autopm_put_interface(serial->parent->interface); |
| 1080 | |
| 1081 | /* done */ |
| 1082 | if (result) |
| 1083 | hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0); |
| 1084 | err_out: |
| 1085 | mutex_unlock(&serial->parent->mutex); |
| 1086 | return result; |
| 1087 | } |
| 1088 | |
| 1089 | /* close the requested serial port */ |
| 1090 | static void hso_serial_close(struct tty_struct *tty, struct file *filp) |
| 1091 | { |
| 1092 | struct hso_serial *serial = tty->driver_data; |
| 1093 | u8 usb_gone; |
| 1094 | |
| 1095 | D1("Closing serial port"); |
| 1096 | |
| 1097 | mutex_lock(&serial->parent->mutex); |
| 1098 | usb_gone = serial->parent->usb_gone; |
| 1099 | |
| 1100 | if (!usb_gone) |
| 1101 | usb_autopm_get_interface(serial->parent->interface); |
| 1102 | |
| 1103 | /* reset the rts and dtr */ |
| 1104 | /* do the actual close */ |
| 1105 | serial->open_count--; |
| 1106 | if (serial->open_count <= 0) { |
| 1107 | kref_put(&serial->parent->ref, hso_serial_ref_free); |
| 1108 | serial->open_count = 0; |
| 1109 | if (serial->tty) { |
| 1110 | serial->tty->driver_data = NULL; |
| 1111 | serial->tty = NULL; |
| 1112 | } |
| 1113 | if (!usb_gone) |
| 1114 | hso_stop_serial_device(serial->parent); |
| 1115 | } |
| 1116 | if (!usb_gone) |
| 1117 | usb_autopm_put_interface(serial->parent->interface); |
| 1118 | mutex_unlock(&serial->parent->mutex); |
| 1119 | } |
| 1120 | |
| 1121 | /* close the requested serial port */ |
| 1122 | static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, |
| 1123 | int count) |
| 1124 | { |
| 1125 | struct hso_serial *serial = get_serial_by_tty(tty); |
| 1126 | int space, tx_bytes; |
| 1127 | unsigned long flags; |
| 1128 | |
| 1129 | /* sanity check */ |
| 1130 | if (serial == NULL) { |
| 1131 | printk(KERN_ERR "%s: serial is NULL\n", __func__); |
| 1132 | return -ENODEV; |
| 1133 | } |
| 1134 | |
| 1135 | spin_lock_irqsave(&serial->serial_lock, flags); |
| 1136 | |
| 1137 | space = serial->tx_data_length - serial->tx_buffer_count; |
| 1138 | tx_bytes = (count < space) ? count : space; |
| 1139 | |
| 1140 | if (!tx_bytes) |
| 1141 | goto out; |
| 1142 | |
| 1143 | memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); |
| 1144 | serial->tx_buffer_count += tx_bytes; |
| 1145 | |
| 1146 | out: |
| 1147 | spin_unlock_irqrestore(&serial->serial_lock, flags); |
| 1148 | |
| 1149 | hso_kick_transmit(serial); |
| 1150 | /* done */ |
| 1151 | return tx_bytes; |
| 1152 | } |
| 1153 | |
| 1154 | /* how much room is there for writing */ |
| 1155 | static int hso_serial_write_room(struct tty_struct *tty) |
| 1156 | { |
| 1157 | struct hso_serial *serial = get_serial_by_tty(tty); |
| 1158 | int room; |
| 1159 | unsigned long flags; |
| 1160 | |
| 1161 | spin_lock_irqsave(&serial->serial_lock, flags); |
| 1162 | room = serial->tx_data_length - serial->tx_buffer_count; |
| 1163 | spin_unlock_irqrestore(&serial->serial_lock, flags); |
| 1164 | |
| 1165 | /* return free room */ |
| 1166 | return room; |
| 1167 | } |
| 1168 | |
| 1169 | /* setup the term */ |
| 1170 | static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) |
| 1171 | { |
| 1172 | struct hso_serial *serial = get_serial_by_tty(tty); |
| 1173 | unsigned long flags; |
| 1174 | |
| 1175 | if (old) |
| 1176 | D5("Termios called with: cflags new[%d] - old[%d]", |
| 1177 | tty->termios->c_cflag, old->c_cflag); |
| 1178 | |
| 1179 | /* the actual setup */ |
| 1180 | spin_lock_irqsave(&serial->serial_lock, flags); |
| 1181 | if (serial->open_count) |
| 1182 | _hso_serial_set_termios(tty, old); |
| 1183 | else |
| 1184 | tty->termios = old; |
| 1185 | spin_unlock_irqrestore(&serial->serial_lock, flags); |
| 1186 | |
| 1187 | /* done */ |
| 1188 | return; |
| 1189 | } |
| 1190 | |
| 1191 | /* how many characters in the buffer */ |
| 1192 | static int hso_serial_chars_in_buffer(struct tty_struct *tty) |
| 1193 | { |
| 1194 | struct hso_serial *serial = get_serial_by_tty(tty); |
| 1195 | int chars; |
| 1196 | unsigned long flags; |
| 1197 | |
| 1198 | /* sanity check */ |
| 1199 | if (serial == NULL) |
| 1200 | return 0; |
| 1201 | |
| 1202 | spin_lock_irqsave(&serial->serial_lock, flags); |
| 1203 | chars = serial->tx_buffer_count; |
| 1204 | spin_unlock_irqrestore(&serial->serial_lock, flags); |
| 1205 | |
| 1206 | return chars; |
| 1207 | } |
| 1208 | |
| 1209 | static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file) |
| 1210 | { |
| 1211 | unsigned int value; |
| 1212 | struct hso_serial *serial = get_serial_by_tty(tty); |
| 1213 | unsigned long flags; |
| 1214 | |
| 1215 | /* sanity check */ |
| 1216 | if (!serial) { |
| 1217 | D1("no tty structures"); |
| 1218 | return -EINVAL; |
| 1219 | } |
| 1220 | |
| 1221 | spin_lock_irqsave(&serial->serial_lock, flags); |
| 1222 | value = ((serial->rts_state) ? TIOCM_RTS : 0) | |
| 1223 | ((serial->dtr_state) ? TIOCM_DTR : 0); |
| 1224 | spin_unlock_irqrestore(&serial->serial_lock, flags); |
| 1225 | |
| 1226 | return value; |
| 1227 | } |
| 1228 | |
| 1229 | static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file, |
| 1230 | unsigned int set, unsigned int clear) |
| 1231 | { |
| 1232 | int val = 0; |
| 1233 | unsigned long flags; |
| 1234 | int if_num; |
| 1235 | struct hso_serial *serial = get_serial_by_tty(tty); |
| 1236 | |
| 1237 | /* sanity check */ |
| 1238 | if (!serial) { |
| 1239 | D1("no tty structures"); |
| 1240 | return -EINVAL; |
| 1241 | } |
| 1242 | if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber; |
| 1243 | |
| 1244 | spin_lock_irqsave(&serial->serial_lock, flags); |
| 1245 | if (set & TIOCM_RTS) |
| 1246 | serial->rts_state = 1; |
| 1247 | if (set & TIOCM_DTR) |
| 1248 | serial->dtr_state = 1; |
| 1249 | |
| 1250 | if (clear & TIOCM_RTS) |
| 1251 | serial->rts_state = 0; |
| 1252 | if (clear & TIOCM_DTR) |
| 1253 | serial->dtr_state = 0; |
| 1254 | |
| 1255 | if (serial->dtr_state) |
| 1256 | val |= 0x01; |
| 1257 | if (serial->rts_state) |
| 1258 | val |= 0x02; |
| 1259 | |
| 1260 | spin_unlock_irqrestore(&serial->serial_lock, flags); |
| 1261 | |
| 1262 | return usb_control_msg(serial->parent->usb, |
| 1263 | usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, |
| 1264 | 0x21, val, if_num, NULL, 0, |
| 1265 | USB_CTRL_SET_TIMEOUT); |
| 1266 | } |
| 1267 | |
| 1268 | /* starts a transmit */ |
| 1269 | static void hso_kick_transmit(struct hso_serial *serial) |
| 1270 | { |
| 1271 | u8 *temp; |
| 1272 | unsigned long flags; |
| 1273 | int res; |
| 1274 | |
| 1275 | spin_lock_irqsave(&serial->serial_lock, flags); |
| 1276 | if (!serial->tx_buffer_count) |
| 1277 | goto out; |
| 1278 | |
| 1279 | if (serial->tx_urb_used) |
| 1280 | goto out; |
| 1281 | |
| 1282 | /* Wakeup USB interface if necessary */ |
| 1283 | if (hso_get_activity(serial->parent) == -EAGAIN) |
| 1284 | goto out; |
| 1285 | |
| 1286 | /* Switch pointers around to avoid memcpy */ |
| 1287 | temp = serial->tx_buffer; |
| 1288 | serial->tx_buffer = serial->tx_data; |
| 1289 | serial->tx_data = temp; |
| 1290 | serial->tx_data_count = serial->tx_buffer_count; |
| 1291 | serial->tx_buffer_count = 0; |
| 1292 | |
| 1293 | /* If temp is set, it means we switched buffers */ |
| 1294 | if (temp && serial->write_data) { |
| 1295 | res = serial->write_data(serial); |
| 1296 | if (res >= 0) |
| 1297 | serial->tx_urb_used = 1; |
| 1298 | } |
| 1299 | out: |
| 1300 | spin_unlock_irqrestore(&serial->serial_lock, flags); |
| 1301 | } |
| 1302 | |
| 1303 | /* make a request (for reading and writing data to muxed serial port) */ |
| 1304 | static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, |
| 1305 | struct urb *ctrl_urb, |
| 1306 | struct usb_ctrlrequest *ctrl_req, |
| 1307 | u8 *ctrl_urb_data, u32 size) |
| 1308 | { |
| 1309 | int result; |
| 1310 | int pipe; |
| 1311 | |
| 1312 | /* Sanity check */ |
| 1313 | if (!serial || !ctrl_urb || !ctrl_req) { |
| 1314 | printk(KERN_ERR "%s: Wrong arguments\n", __func__); |
| 1315 | return -EINVAL; |
| 1316 | } |
| 1317 | |
| 1318 | /* initialize */ |
| 1319 | ctrl_req->wValue = 0; |
| 1320 | ctrl_req->wIndex = hso_port_to_mux(port); |
| 1321 | ctrl_req->wLength = size; |
| 1322 | |
| 1323 | if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { |
| 1324 | /* Reading command */ |
| 1325 | ctrl_req->bRequestType = USB_DIR_IN | |
| 1326 | USB_TYPE_OPTION_VENDOR | |
| 1327 | USB_RECIP_INTERFACE; |
| 1328 | ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; |
| 1329 | pipe = usb_rcvctrlpipe(serial->parent->usb, 0); |
| 1330 | } else { |
| 1331 | /* Writing command */ |
| 1332 | ctrl_req->bRequestType = USB_DIR_OUT | |
| 1333 | USB_TYPE_OPTION_VENDOR | |
| 1334 | USB_RECIP_INTERFACE; |
| 1335 | ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; |
| 1336 | pipe = usb_sndctrlpipe(serial->parent->usb, 0); |
| 1337 | } |
| 1338 | /* syslog */ |
| 1339 | D2("%s command (%02x) len: %d, port: %d", |
| 1340 | type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", |
| 1341 | ctrl_req->bRequestType, ctrl_req->wLength, port); |
| 1342 | |
| 1343 | /* Load ctrl urb */ |
| 1344 | ctrl_urb->transfer_flags = 0; |
| 1345 | usb_fill_control_urb(ctrl_urb, |
| 1346 | serial->parent->usb, |
| 1347 | pipe, |
| 1348 | (u8 *) ctrl_req, |
| 1349 | ctrl_urb_data, size, ctrl_callback, serial); |
| 1350 | /* Send it on merry way */ |
| 1351 | result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); |
| 1352 | if (result) { |
| 1353 | dev_err(&ctrl_urb->dev->dev, |
| 1354 | "%s failed submit ctrl_urb %d type %d", __func__, |
| 1355 | result, type); |
| 1356 | return result; |
| 1357 | } |
| 1358 | |
| 1359 | /* done */ |
| 1360 | return size; |
| 1361 | } |
| 1362 | |
| 1363 | /* called by intr_callback when read occurs */ |
| 1364 | static int hso_mux_serial_read(struct hso_serial *serial) |
| 1365 | { |
| 1366 | if (!serial) |
| 1367 | return -EINVAL; |
| 1368 | |
| 1369 | /* clean data */ |
| 1370 | memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); |
| 1371 | /* make the request */ |
| 1372 | |
| 1373 | if (serial->num_rx_urbs != 1) { |
| 1374 | dev_err(&serial->parent->interface->dev, |
| 1375 | "ERROR: mux'd reads with multiple buffers " |
| 1376 | "not possible\n"); |
| 1377 | return 0; |
| 1378 | } |
| 1379 | return mux_device_request(serial, |
| 1380 | USB_CDC_GET_ENCAPSULATED_RESPONSE, |
| 1381 | serial->parent->port_spec & HSO_PORT_MASK, |
| 1382 | serial->rx_urb[0], |
| 1383 | &serial->ctrl_req_rx, |
| 1384 | serial->rx_data[0], serial->rx_data_length); |
| 1385 | } |
| 1386 | |
| 1387 | /* used for muxed serial port callback (muxed serial read) */ |
| 1388 | static void intr_callback(struct urb *urb) |
| 1389 | { |
| 1390 | struct hso_shared_int *shared_int = urb->context; |
| 1391 | struct hso_serial *serial; |
| 1392 | unsigned char *port_req; |
| 1393 | int status = urb->status; |
| 1394 | int i; |
| 1395 | |
| 1396 | usb_mark_last_busy(urb->dev); |
| 1397 | |
| 1398 | /* sanity check */ |
| 1399 | if (!shared_int) |
| 1400 | return; |
| 1401 | |
| 1402 | /* status check */ |
| 1403 | if (status) { |
| 1404 | log_usb_status(status, __func__); |
| 1405 | return; |
| 1406 | } |
| 1407 | D4("\n--- Got intr callback 0x%02X ---", status); |
| 1408 | |
| 1409 | /* what request? */ |
| 1410 | port_req = urb->transfer_buffer; |
| 1411 | D4(" port_req = 0x%.2X\n", *port_req); |
| 1412 | /* loop over all muxed ports to find the one sending this */ |
| 1413 | for (i = 0; i < 8; i++) { |
| 1414 | /* max 8 channels on MUX */ |
| 1415 | if (*port_req & (1 << i)) { |
| 1416 | serial = get_serial_by_shared_int_and_type(shared_int, |
| 1417 | (1 << i)); |
| 1418 | if (serial != NULL) { |
| 1419 | D1("Pending read interrupt on port %d\n", i); |
| 1420 | if (!test_and_set_bit(HSO_SERIAL_FLAG_RX_SENT, |
| 1421 | &serial->flags)) { |
| 1422 | /* Setup and send a ctrl req read on |
| 1423 | * port i */ |
| 1424 | hso_mux_serial_read(serial); |
| 1425 | } else { |
| 1426 | D1("Already pending a read on " |
| 1427 | "port %d\n", i); |
| 1428 | } |
| 1429 | } |
| 1430 | } |
| 1431 | } |
| 1432 | /* Resubmit interrupt urb */ |
| 1433 | hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); |
| 1434 | } |
| 1435 | |
| 1436 | /* called for writing to muxed serial port */ |
| 1437 | static int hso_mux_serial_write_data(struct hso_serial *serial) |
| 1438 | { |
| 1439 | if (NULL == serial) |
| 1440 | return -EINVAL; |
| 1441 | |
| 1442 | return mux_device_request(serial, |
| 1443 | USB_CDC_SEND_ENCAPSULATED_COMMAND, |
| 1444 | serial->parent->port_spec & HSO_PORT_MASK, |
| 1445 | serial->tx_urb, |
| 1446 | &serial->ctrl_req_tx, |
| 1447 | serial->tx_data, serial->tx_data_count); |
| 1448 | } |
| 1449 | |
| 1450 | /* write callback for Diag and CS port */ |
| 1451 | static void hso_std_serial_write_bulk_callback(struct urb *urb) |
| 1452 | { |
| 1453 | struct hso_serial *serial = urb->context; |
| 1454 | int status = urb->status; |
| 1455 | |
| 1456 | /* sanity check */ |
| 1457 | if (!serial) { |
| 1458 | D1("serial == NULL"); |
| 1459 | return; |
| 1460 | } |
| 1461 | |
| 1462 | spin_lock(&serial->serial_lock); |
| 1463 | serial->tx_urb_used = 0; |
| 1464 | spin_unlock(&serial->serial_lock); |
| 1465 | if (status) { |
| 1466 | log_usb_status(status, __func__); |
| 1467 | return; |
| 1468 | } |
| 1469 | hso_put_activity(serial->parent); |
| 1470 | tty_wakeup(serial->tty); |
| 1471 | hso_kick_transmit(serial); |
| 1472 | |
| 1473 | D1(" "); |
| 1474 | return; |
| 1475 | } |
| 1476 | |
| 1477 | /* called for writing diag or CS serial port */ |
| 1478 | static int hso_std_serial_write_data(struct hso_serial *serial) |
| 1479 | { |
| 1480 | int count = serial->tx_data_count; |
| 1481 | int result; |
| 1482 | |
| 1483 | usb_fill_bulk_urb(serial->tx_urb, |
| 1484 | serial->parent->usb, |
| 1485 | usb_sndbulkpipe(serial->parent->usb, |
| 1486 | serial->out_endp-> |
| 1487 | bEndpointAddress & 0x7F), |
| 1488 | serial->tx_data, serial->tx_data_count, |
| 1489 | hso_std_serial_write_bulk_callback, serial); |
| 1490 | |
| 1491 | result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); |
| 1492 | if (result) { |
| 1493 | dev_warn(&serial->parent->usb->dev, |
| 1494 | "Failed to submit urb - res %d\n", result); |
| 1495 | return result; |
| 1496 | } |
| 1497 | |
| 1498 | return count; |
| 1499 | } |
| 1500 | |
| 1501 | /* callback after read or write on muxed serial port */ |
| 1502 | static void ctrl_callback(struct urb *urb) |
| 1503 | { |
| 1504 | struct hso_serial *serial = urb->context; |
| 1505 | struct usb_ctrlrequest *req; |
| 1506 | int status = urb->status; |
| 1507 | |
| 1508 | /* sanity check */ |
| 1509 | if (!serial) |
| 1510 | return; |
| 1511 | |
| 1512 | spin_lock(&serial->serial_lock); |
| 1513 | serial->tx_urb_used = 0; |
| 1514 | spin_unlock(&serial->serial_lock); |
| 1515 | if (status) { |
| 1516 | log_usb_status(status, __func__); |
| 1517 | return; |
| 1518 | } |
| 1519 | |
| 1520 | /* what request? */ |
| 1521 | req = (struct usb_ctrlrequest *)(urb->setup_packet); |
| 1522 | D4("\n--- Got muxed ctrl callback 0x%02X ---", status); |
| 1523 | D4("Actual length of urb = %d\n", urb->actual_length); |
| 1524 | DUMP1(urb->transfer_buffer, urb->actual_length); |
| 1525 | |
| 1526 | if (req->bRequestType == |
| 1527 | (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { |
| 1528 | /* response to a read command */ |
| 1529 | if (serial->open_count > 0) { |
| 1530 | /* handle RX data the normal way */ |
| 1531 | put_rxbuf_data(urb, serial); |
| 1532 | } |
| 1533 | |
| 1534 | /* Re issue a read as long as we receive data. */ |
| 1535 | if (urb->actual_length != 0) |
| 1536 | hso_mux_serial_read(serial); |
| 1537 | else |
| 1538 | clear_bit(HSO_SERIAL_FLAG_RX_SENT, &serial->flags); |
| 1539 | } else { |
| 1540 | hso_put_activity(serial->parent); |
| 1541 | tty_wakeup(serial->tty); |
| 1542 | /* response to a write command */ |
| 1543 | hso_kick_transmit(serial); |
| 1544 | } |
| 1545 | } |
| 1546 | |
| 1547 | /* handle RX data for serial port */ |
| 1548 | static void put_rxbuf_data(struct urb *urb, struct hso_serial *serial) |
| 1549 | { |
| 1550 | struct tty_struct *tty = serial->tty; |
| 1551 | |
| 1552 | /* Sanity check */ |
| 1553 | if (urb == NULL || serial == NULL) { |
| 1554 | D1("serial = NULL"); |
| 1555 | return; |
| 1556 | } |
| 1557 | |
| 1558 | /* Push data to tty */ |
| 1559 | if (tty && urb->actual_length) { |
| 1560 | D1("data to push to tty"); |
| 1561 | tty_insert_flip_string(tty, urb->transfer_buffer, |
| 1562 | urb->actual_length); |
| 1563 | tty_flip_buffer_push(tty); |
| 1564 | } |
| 1565 | } |
| 1566 | |
| 1567 | /* read callback for Diag and CS port */ |
| 1568 | static void hso_std_serial_read_bulk_callback(struct urb *urb) |
| 1569 | { |
| 1570 | struct hso_serial *serial = urb->context; |
| 1571 | int result; |
| 1572 | int status = urb->status; |
| 1573 | |
| 1574 | /* sanity check */ |
| 1575 | if (!serial) { |
| 1576 | D1("serial == NULL"); |
| 1577 | return; |
| 1578 | } else if (status) { |
| 1579 | log_usb_status(status, __func__); |
| 1580 | return; |
| 1581 | } |
| 1582 | |
| 1583 | D4("\n--- Got serial_read_bulk callback %02x ---", status); |
| 1584 | D1("Actual length = %d\n", urb->actual_length); |
| 1585 | DUMP1(urb->transfer_buffer, urb->actual_length); |
| 1586 | |
| 1587 | /* Anyone listening? */ |
| 1588 | if (serial->open_count == 0) |
| 1589 | return; |
| 1590 | |
| 1591 | if (status == 0) { |
| 1592 | if (serial->parent->port_spec & HSO_INFO_CRC_BUG) { |
| 1593 | u32 rest; |
| 1594 | u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; |
| 1595 | rest = |
| 1596 | urb->actual_length % |
| 1597 | serial->in_endp->wMaxPacketSize; |
| 1598 | if (((rest == 5) || (rest == 6)) |
| 1599 | && !memcmp(((u8 *) urb->transfer_buffer) + |
| 1600 | urb->actual_length - 4, crc_check, 4)) { |
| 1601 | urb->actual_length -= 4; |
| 1602 | } |
| 1603 | } |
| 1604 | /* Valid data, handle RX data */ |
| 1605 | put_rxbuf_data(urb, serial); |
| 1606 | } else if (status == -ENOENT || status == -ECONNRESET) { |
| 1607 | /* Unlinked - check for throttled port. */ |
| 1608 | D2("Port %d, successfully unlinked urb", serial->minor); |
| 1609 | } else { |
| 1610 | D2("Port %d, status = %d for read urb", serial->minor, status); |
| 1611 | return; |
| 1612 | } |
| 1613 | |
| 1614 | usb_mark_last_busy(urb->dev); |
| 1615 | |
| 1616 | /* We are done with this URB, resubmit it. Prep the USB to wait for |
| 1617 | * another frame */ |
| 1618 | usb_fill_bulk_urb(urb, serial->parent->usb, |
| 1619 | usb_rcvbulkpipe(serial->parent->usb, |
| 1620 | serial->in_endp-> |
| 1621 | bEndpointAddress & 0x7F), |
| 1622 | urb->transfer_buffer, serial->rx_data_length, |
| 1623 | hso_std_serial_read_bulk_callback, serial); |
| 1624 | /* Give this to the USB subsystem so it can tell us when more data |
| 1625 | * arrives. */ |
| 1626 | result = usb_submit_urb(urb, GFP_ATOMIC); |
| 1627 | if (result) { |
| 1628 | dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d", |
| 1629 | __func__, result); |
| 1630 | } |
| 1631 | } |
| 1632 | |
| 1633 | /* Base driver functions */ |
| 1634 | |
| 1635 | static void hso_log_port(struct hso_device *hso_dev) |
| 1636 | { |
| 1637 | char *port_type; |
| 1638 | char port_dev[20]; |
| 1639 | |
| 1640 | switch (hso_dev->port_spec & HSO_PORT_MASK) { |
| 1641 | case HSO_PORT_CONTROL: |
| 1642 | port_type = "Control"; |
| 1643 | break; |
| 1644 | case HSO_PORT_APP: |
| 1645 | port_type = "Application"; |
| 1646 | break; |
| 1647 | case HSO_PORT_GPS: |
| 1648 | port_type = "GPS"; |
| 1649 | break; |
| 1650 | case HSO_PORT_GPS_CONTROL: |
| 1651 | port_type = "GPS control"; |
| 1652 | break; |
| 1653 | case HSO_PORT_APP2: |
| 1654 | port_type = "Application2"; |
| 1655 | break; |
| 1656 | case HSO_PORT_PCSC: |
| 1657 | port_type = "PCSC"; |
| 1658 | break; |
| 1659 | case HSO_PORT_DIAG: |
| 1660 | port_type = "Diagnostic"; |
| 1661 | break; |
| 1662 | case HSO_PORT_DIAG2: |
| 1663 | port_type = "Diagnostic2"; |
| 1664 | break; |
| 1665 | case HSO_PORT_MODEM: |
| 1666 | port_type = "Modem"; |
| 1667 | break; |
| 1668 | case HSO_PORT_NETWORK: |
| 1669 | port_type = "Network"; |
| 1670 | break; |
| 1671 | default: |
| 1672 | port_type = "Unknown"; |
| 1673 | break; |
| 1674 | } |
| 1675 | if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { |
| 1676 | sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); |
| 1677 | } else |
| 1678 | sprintf(port_dev, "/dev/%s%d", tty_filename, |
| 1679 | dev2ser(hso_dev)->minor); |
| 1680 | |
| 1681 | dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", |
| 1682 | port_type, port_dev); |
| 1683 | } |
| 1684 | |
| 1685 | static int hso_start_net_device(struct hso_device *hso_dev) |
| 1686 | { |
| 1687 | int i, result = 0; |
| 1688 | struct hso_net *hso_net = dev2net(hso_dev); |
| 1689 | |
| 1690 | if (!hso_net) |
| 1691 | return -ENODEV; |
| 1692 | |
| 1693 | /* send URBs for all read buffers */ |
| 1694 | for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { |
| 1695 | |
| 1696 | /* Prep a receive URB */ |
| 1697 | usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], |
| 1698 | hso_dev->usb, |
| 1699 | usb_rcvbulkpipe(hso_dev->usb, |
| 1700 | hso_net->in_endp-> |
| 1701 | bEndpointAddress & 0x7F), |
| 1702 | hso_net->mux_bulk_rx_buf_pool[i], |
| 1703 | MUX_BULK_RX_BUF_SIZE, read_bulk_callback, |
| 1704 | hso_net); |
| 1705 | |
| 1706 | /* Put it out there so the device can send us stuff */ |
| 1707 | result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], |
| 1708 | GFP_NOIO); |
| 1709 | if (result) |
| 1710 | dev_warn(&hso_dev->usb->dev, |
| 1711 | "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, |
| 1712 | i, result); |
| 1713 | } |
| 1714 | |
| 1715 | return result; |
| 1716 | } |
| 1717 | |
| 1718 | static int hso_stop_net_device(struct hso_device *hso_dev) |
| 1719 | { |
| 1720 | int i; |
| 1721 | struct hso_net *hso_net = dev2net(hso_dev); |
| 1722 | |
| 1723 | if (!hso_net) |
| 1724 | return -ENODEV; |
| 1725 | |
| 1726 | for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { |
| 1727 | if (hso_net->mux_bulk_rx_urb_pool[i]) |
| 1728 | usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); |
| 1729 | |
| 1730 | } |
| 1731 | if (hso_net->mux_bulk_tx_urb) |
| 1732 | usb_kill_urb(hso_net->mux_bulk_tx_urb); |
| 1733 | |
| 1734 | return 0; |
| 1735 | } |
| 1736 | |
| 1737 | static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) |
| 1738 | { |
| 1739 | int i, result = 0; |
| 1740 | struct hso_serial *serial = dev2ser(hso_dev); |
| 1741 | |
| 1742 | if (!serial) |
| 1743 | return -ENODEV; |
| 1744 | |
| 1745 | /* If it is not the MUX port fill in and submit a bulk urb (already |
| 1746 | * allocated in hso_serial_start) */ |
| 1747 | if (!(serial->parent->port_spec & HSO_INTF_MUX)) { |
| 1748 | for (i = 0; i < serial->num_rx_urbs; i++) { |
| 1749 | usb_fill_bulk_urb(serial->rx_urb[i], |
| 1750 | serial->parent->usb, |
| 1751 | usb_rcvbulkpipe(serial->parent->usb, |
| 1752 | serial->in_endp-> |
| 1753 | bEndpointAddress & |
| 1754 | 0x7F), |
| 1755 | serial->rx_data[i], |
| 1756 | serial->rx_data_length, |
| 1757 | hso_std_serial_read_bulk_callback, |
| 1758 | serial); |
| 1759 | result = usb_submit_urb(serial->rx_urb[i], flags); |
| 1760 | if (result) { |
| 1761 | dev_warn(&serial->parent->usb->dev, |
| 1762 | "Failed to submit urb - res %d\n", |
| 1763 | result); |
| 1764 | break; |
| 1765 | } |
| 1766 | } |
| 1767 | } else { |
| 1768 | mutex_lock(&serial->shared_int->shared_int_lock); |
| 1769 | if (!serial->shared_int->use_count) { |
| 1770 | result = |
| 1771 | hso_mux_submit_intr_urb(serial->shared_int, |
| 1772 | hso_dev->usb, flags); |
| 1773 | } |
| 1774 | serial->shared_int->use_count++; |
| 1775 | mutex_unlock(&serial->shared_int->shared_int_lock); |
| 1776 | } |
| 1777 | |
| 1778 | return result; |
| 1779 | } |
| 1780 | |
| 1781 | static int hso_stop_serial_device(struct hso_device *hso_dev) |
| 1782 | { |
| 1783 | int i; |
| 1784 | struct hso_serial *serial = dev2ser(hso_dev); |
| 1785 | |
| 1786 | if (!serial) |
| 1787 | return -ENODEV; |
| 1788 | |
| 1789 | for (i = 0; i < serial->num_rx_urbs; i++) { |
| 1790 | if (serial->rx_urb[i]) |
| 1791 | usb_kill_urb(serial->rx_urb[i]); |
| 1792 | } |
| 1793 | |
| 1794 | if (serial->tx_urb) |
| 1795 | usb_kill_urb(serial->tx_urb); |
| 1796 | |
| 1797 | if (serial->shared_int) { |
| 1798 | mutex_lock(&serial->shared_int->shared_int_lock); |
| 1799 | if (serial->shared_int->use_count && |
| 1800 | (--serial->shared_int->use_count == 0)) { |
| 1801 | struct urb *urb; |
| 1802 | |
| 1803 | urb = serial->shared_int->shared_intr_urb; |
| 1804 | if (urb) |
| 1805 | usb_kill_urb(urb); |
| 1806 | } |
| 1807 | mutex_unlock(&serial->shared_int->shared_int_lock); |
| 1808 | } |
| 1809 | |
| 1810 | return 0; |
| 1811 | } |
| 1812 | |
| 1813 | static void hso_serial_common_free(struct hso_serial *serial) |
| 1814 | { |
| 1815 | int i; |
| 1816 | |
| 1817 | if (serial->parent->dev) |
| 1818 | device_remove_file(serial->parent->dev, &dev_attr_hsotype); |
| 1819 | |
| 1820 | tty_unregister_device(tty_drv, serial->minor); |
| 1821 | |
| 1822 | for (i = 0; i < serial->num_rx_urbs; i++) { |
| 1823 | /* unlink and free RX URB */ |
| 1824 | usb_free_urb(serial->rx_urb[i]); |
| 1825 | /* free the RX buffer */ |
| 1826 | kfree(serial->rx_data[i]); |
| 1827 | } |
| 1828 | |
| 1829 | /* unlink and free TX URB */ |
| 1830 | usb_free_urb(serial->tx_urb); |
| 1831 | kfree(serial->tx_data); |
| 1832 | } |
| 1833 | |
| 1834 | static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, |
| 1835 | int rx_size, int tx_size) |
| 1836 | { |
| 1837 | struct device *dev; |
| 1838 | int minor; |
| 1839 | int i; |
| 1840 | |
| 1841 | minor = get_free_serial_index(); |
| 1842 | if (minor < 0) |
| 1843 | goto exit; |
| 1844 | |
| 1845 | /* register our minor number */ |
| 1846 | serial->parent->dev = tty_register_device(tty_drv, minor, |
| 1847 | &serial->parent->interface->dev); |
| 1848 | dev = serial->parent->dev; |
| 1849 | dev->driver_data = serial->parent; |
| 1850 | i = device_create_file(dev, &dev_attr_hsotype); |
| 1851 | |
| 1852 | /* fill in specific data for later use */ |
| 1853 | serial->minor = minor; |
| 1854 | serial->magic = HSO_SERIAL_MAGIC; |
| 1855 | spin_lock_init(&serial->serial_lock); |
| 1856 | serial->num_rx_urbs = num_urbs; |
| 1857 | |
| 1858 | /* RX, allocate urb and initialize */ |
| 1859 | |
| 1860 | /* prepare our RX buffer */ |
| 1861 | serial->rx_data_length = rx_size; |
| 1862 | for (i = 0; i < serial->num_rx_urbs; i++) { |
| 1863 | serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); |
| 1864 | if (!serial->rx_urb[i]) { |
| 1865 | dev_err(dev, "Could not allocate urb?\n"); |
| 1866 | goto exit; |
| 1867 | } |
| 1868 | serial->rx_urb[i]->transfer_buffer = NULL; |
| 1869 | serial->rx_urb[i]->transfer_buffer_length = 0; |
| 1870 | serial->rx_data[i] = kzalloc(serial->rx_data_length, |
| 1871 | GFP_KERNEL); |
| 1872 | if (!serial->rx_data[i]) { |
| 1873 | dev_err(dev, "%s - Out of memory\n", __func__); |
| 1874 | goto exit; |
| 1875 | } |
| 1876 | } |
| 1877 | |
| 1878 | /* TX, allocate urb and initialize */ |
| 1879 | serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 1880 | if (!serial->tx_urb) { |
| 1881 | dev_err(dev, "Could not allocate urb?\n"); |
| 1882 | goto exit; |
| 1883 | } |
| 1884 | serial->tx_urb->transfer_buffer = NULL; |
| 1885 | serial->tx_urb->transfer_buffer_length = 0; |
| 1886 | /* prepare our TX buffer */ |
| 1887 | serial->tx_data_count = 0; |
| 1888 | serial->tx_buffer_count = 0; |
| 1889 | serial->tx_data_length = tx_size; |
| 1890 | serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); |
| 1891 | if (!serial->tx_data) { |
| 1892 | dev_err(dev, "%s - Out of memory", __func__); |
| 1893 | goto exit; |
| 1894 | } |
| 1895 | serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); |
| 1896 | if (!serial->tx_buffer) { |
| 1897 | dev_err(dev, "%s - Out of memory", __func__); |
| 1898 | goto exit; |
| 1899 | } |
| 1900 | |
| 1901 | return 0; |
| 1902 | exit: |
| 1903 | hso_serial_common_free(serial); |
| 1904 | return -1; |
| 1905 | } |
| 1906 | |
| 1907 | /* Frees a general hso device */ |
| 1908 | static void hso_free_device(struct hso_device *hso_dev) |
| 1909 | { |
| 1910 | kfree(hso_dev); |
| 1911 | } |
| 1912 | |
| 1913 | /* Creates a general hso device */ |
| 1914 | static struct hso_device *hso_create_device(struct usb_interface *intf, |
| 1915 | int port_spec) |
| 1916 | { |
| 1917 | struct hso_device *hso_dev; |
| 1918 | |
| 1919 | hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); |
| 1920 | if (!hso_dev) |
| 1921 | return NULL; |
| 1922 | |
| 1923 | hso_dev->port_spec = port_spec; |
| 1924 | hso_dev->usb = interface_to_usbdev(intf); |
| 1925 | hso_dev->interface = intf; |
| 1926 | kref_init(&hso_dev->ref); |
| 1927 | mutex_init(&hso_dev->mutex); |
| 1928 | |
| 1929 | INIT_WORK(&hso_dev->async_get_intf, async_get_intf); |
| 1930 | INIT_WORK(&hso_dev->async_put_intf, async_put_intf); |
| 1931 | |
| 1932 | return hso_dev; |
| 1933 | } |
| 1934 | |
| 1935 | /* Removes a network device in the network device table */ |
| 1936 | static int remove_net_device(struct hso_device *hso_dev) |
| 1937 | { |
| 1938 | int i; |
| 1939 | |
| 1940 | for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { |
| 1941 | if (network_table[i] == hso_dev) { |
| 1942 | network_table[i] = NULL; |
| 1943 | break; |
| 1944 | } |
| 1945 | } |
| 1946 | if (i == HSO_MAX_NET_DEVICES) |
| 1947 | return -1; |
| 1948 | return 0; |
| 1949 | } |
| 1950 | |
| 1951 | /* Frees our network device */ |
| 1952 | static void hso_free_net_device(struct hso_device *hso_dev) |
| 1953 | { |
| 1954 | int i; |
| 1955 | struct hso_net *hso_net = dev2net(hso_dev); |
| 1956 | |
| 1957 | if (!hso_net) |
| 1958 | return; |
| 1959 | |
| 1960 | /* start freeing */ |
| 1961 | for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { |
| 1962 | usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); |
| 1963 | kfree(hso_net->mux_bulk_rx_buf_pool[i]); |
| 1964 | } |
| 1965 | usb_free_urb(hso_net->mux_bulk_tx_urb); |
| 1966 | kfree(hso_net->mux_bulk_tx_buf); |
| 1967 | |
| 1968 | remove_net_device(hso_net->parent); |
| 1969 | |
| 1970 | if (hso_net->net) { |
| 1971 | unregister_netdev(hso_net->net); |
| 1972 | free_netdev(hso_net->net); |
| 1973 | } |
| 1974 | |
| 1975 | hso_free_device(hso_dev); |
| 1976 | } |
| 1977 | |
| 1978 | /* initialize the network interface */ |
| 1979 | static void hso_net_init(struct net_device *net) |
| 1980 | { |
| 1981 | struct hso_net *hso_net = netdev_priv(net); |
| 1982 | |
| 1983 | D1("sizeof hso_net is %d", (int)sizeof(*hso_net)); |
| 1984 | |
| 1985 | /* fill in the other fields */ |
| 1986 | net->open = hso_net_open; |
| 1987 | net->stop = hso_net_close; |
| 1988 | net->hard_start_xmit = hso_net_start_xmit; |
| 1989 | net->tx_timeout = hso_net_tx_timeout; |
| 1990 | net->watchdog_timeo = HSO_NET_TX_TIMEOUT; |
| 1991 | net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; |
| 1992 | net->type = ARPHRD_NONE; |
| 1993 | net->mtu = DEFAULT_MTU - 14; |
| 1994 | net->tx_queue_len = 10; |
| 1995 | SET_ETHTOOL_OPS(net, &ops); |
| 1996 | |
| 1997 | /* and initialize the semaphore */ |
| 1998 | spin_lock_init(&hso_net->net_lock); |
| 1999 | } |
| 2000 | |
| 2001 | /* Adds a network device in the network device table */ |
| 2002 | static int add_net_device(struct hso_device *hso_dev) |
| 2003 | { |
| 2004 | int i; |
| 2005 | |
| 2006 | for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { |
| 2007 | if (network_table[i] == NULL) { |
| 2008 | network_table[i] = hso_dev; |
| 2009 | break; |
| 2010 | } |
| 2011 | } |
| 2012 | if (i == HSO_MAX_NET_DEVICES) |
| 2013 | return -1; |
| 2014 | return 0; |
| 2015 | } |
| 2016 | |
| 2017 | static int hso_radio_toggle(void *data, enum rfkill_state state) |
| 2018 | { |
| 2019 | struct hso_device *hso_dev = data; |
| 2020 | int enabled = (state == RFKILL_STATE_ON); |
| 2021 | int rv; |
| 2022 | |
| 2023 | mutex_lock(&hso_dev->mutex); |
| 2024 | if (hso_dev->usb_gone) |
| 2025 | rv = 0; |
| 2026 | else |
| 2027 | rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), |
| 2028 | enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, |
| 2029 | USB_CTRL_SET_TIMEOUT); |
| 2030 | mutex_unlock(&hso_dev->mutex); |
| 2031 | return rv; |
| 2032 | } |
| 2033 | |
| 2034 | /* Creates and sets up everything for rfkill */ |
| 2035 | static void hso_create_rfkill(struct hso_device *hso_dev, |
| 2036 | struct usb_interface *interface) |
| 2037 | { |
| 2038 | struct hso_net *hso_net = dev2net(hso_dev); |
| 2039 | struct device *dev = hso_dev->dev; |
| 2040 | char *rfkn; |
| 2041 | |
| 2042 | hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev, |
| 2043 | RFKILL_TYPE_WLAN); |
| 2044 | if (!hso_net->rfkill) { |
| 2045 | dev_err(dev, "%s - Out of memory", __func__); |
| 2046 | return; |
| 2047 | } |
| 2048 | rfkn = kzalloc(20, GFP_KERNEL); |
| 2049 | if (!rfkn) { |
| 2050 | rfkill_free(hso_net->rfkill); |
| 2051 | dev_err(dev, "%s - Out of memory", __func__); |
| 2052 | return; |
| 2053 | } |
| 2054 | snprintf(rfkn, 20, "hso-%d", |
| 2055 | interface->altsetting->desc.bInterfaceNumber); |
| 2056 | hso_net->rfkill->name = rfkn; |
| 2057 | hso_net->rfkill->state = RFKILL_STATE_ON; |
| 2058 | hso_net->rfkill->data = hso_dev; |
| 2059 | hso_net->rfkill->toggle_radio = hso_radio_toggle; |
| 2060 | if (rfkill_register(hso_net->rfkill) < 0) { |
| 2061 | kfree(rfkn); |
| 2062 | hso_net->rfkill->name = NULL; |
| 2063 | rfkill_free(hso_net->rfkill); |
| 2064 | dev_err(dev, "%s - Failed to register rfkill", __func__); |
| 2065 | return; |
| 2066 | } |
| 2067 | } |
| 2068 | |
| 2069 | /* Creates our network device */ |
| 2070 | static struct hso_device *hso_create_net_device(struct usb_interface *interface) |
| 2071 | { |
| 2072 | int result, i; |
| 2073 | struct net_device *net; |
| 2074 | struct hso_net *hso_net; |
| 2075 | struct hso_device *hso_dev; |
| 2076 | |
| 2077 | hso_dev = hso_create_device(interface, HSO_INTF_MUX | HSO_PORT_NETWORK); |
| 2078 | if (!hso_dev) |
| 2079 | return NULL; |
| 2080 | |
| 2081 | /* allocate our network device, then we can put in our private data */ |
| 2082 | /* call hso_net_init to do the basic initialization */ |
| 2083 | net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init); |
| 2084 | if (!net) { |
| 2085 | dev_err(&interface->dev, "Unable to create ethernet device\n"); |
| 2086 | goto exit; |
| 2087 | } |
| 2088 | |
| 2089 | hso_net = netdev_priv(net); |
| 2090 | |
| 2091 | hso_dev->port_data.dev_net = hso_net; |
| 2092 | hso_net->net = net; |
| 2093 | hso_net->parent = hso_dev; |
| 2094 | |
| 2095 | hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, |
| 2096 | USB_DIR_IN); |
| 2097 | if (!hso_net->in_endp) { |
| 2098 | dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); |
| 2099 | goto exit; |
| 2100 | } |
| 2101 | hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, |
| 2102 | USB_DIR_OUT); |
| 2103 | if (!hso_net->out_endp) { |
| 2104 | dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); |
| 2105 | goto exit; |
| 2106 | } |
| 2107 | SET_NETDEV_DEV(net, &interface->dev); |
| 2108 | |
| 2109 | /* registering our net device */ |
| 2110 | result = register_netdev(net); |
| 2111 | if (result) { |
| 2112 | dev_err(&interface->dev, "Failed to register device\n"); |
| 2113 | goto exit; |
| 2114 | } |
| 2115 | |
| 2116 | /* start allocating */ |
| 2117 | for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { |
| 2118 | hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); |
| 2119 | if (!hso_net->mux_bulk_rx_urb_pool[i]) { |
| 2120 | dev_err(&interface->dev, "Could not allocate rx urb\n"); |
| 2121 | goto exit; |
| 2122 | } |
| 2123 | hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, |
| 2124 | GFP_KERNEL); |
| 2125 | if (!hso_net->mux_bulk_rx_buf_pool[i]) { |
| 2126 | dev_err(&interface->dev, "Could not allocate rx buf\n"); |
| 2127 | goto exit; |
| 2128 | } |
| 2129 | } |
| 2130 | hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 2131 | if (!hso_net->mux_bulk_tx_urb) { |
| 2132 | dev_err(&interface->dev, "Could not allocate tx urb\n"); |
| 2133 | goto exit; |
| 2134 | } |
| 2135 | hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); |
| 2136 | if (!hso_net->mux_bulk_tx_buf) { |
| 2137 | dev_err(&interface->dev, "Could not allocate tx buf\n"); |
| 2138 | goto exit; |
| 2139 | } |
| 2140 | |
| 2141 | add_net_device(hso_dev); |
| 2142 | |
| 2143 | hso_log_port(hso_dev); |
| 2144 | |
| 2145 | hso_create_rfkill(hso_dev, interface); |
| 2146 | |
| 2147 | return hso_dev; |
| 2148 | exit: |
| 2149 | hso_free_net_device(hso_dev); |
| 2150 | return NULL; |
| 2151 | } |
| 2152 | |
| 2153 | /* Frees an AT channel ( goes for both mux and non-mux ) */ |
| 2154 | static void hso_free_serial_device(struct hso_device *hso_dev) |
| 2155 | { |
| 2156 | struct hso_serial *serial = dev2ser(hso_dev); |
| 2157 | |
| 2158 | if (!serial) |
| 2159 | return; |
| 2160 | set_serial_by_index(serial->minor, NULL); |
| 2161 | |
| 2162 | hso_serial_common_free(serial); |
| 2163 | |
| 2164 | if (serial->shared_int) { |
| 2165 | mutex_lock(&serial->shared_int->shared_int_lock); |
| 2166 | if (--serial->shared_int->ref_count == 0) |
| 2167 | hso_free_shared_int(serial->shared_int); |
| 2168 | else |
| 2169 | mutex_unlock(&serial->shared_int->shared_int_lock); |
| 2170 | } |
| 2171 | kfree(serial); |
| 2172 | hso_free_device(hso_dev); |
| 2173 | } |
| 2174 | |
| 2175 | /* Creates a bulk AT channel */ |
| 2176 | static struct hso_device *hso_create_bulk_serial_device( |
| 2177 | struct usb_interface *interface, int port) |
| 2178 | { |
| 2179 | struct hso_device *hso_dev; |
| 2180 | struct hso_serial *serial; |
| 2181 | int num_urbs; |
| 2182 | |
| 2183 | hso_dev = hso_create_device(interface, port); |
| 2184 | if (!hso_dev) |
| 2185 | return NULL; |
| 2186 | |
| 2187 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
| 2188 | if (!serial) |
| 2189 | goto exit; |
| 2190 | |
| 2191 | serial->parent = hso_dev; |
| 2192 | hso_dev->port_data.dev_serial = serial; |
| 2193 | |
| 2194 | if (port & HSO_PORT_MODEM) |
| 2195 | num_urbs = 2; |
| 2196 | else |
| 2197 | num_urbs = 1; |
| 2198 | |
| 2199 | if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, |
| 2200 | BULK_URB_TX_SIZE)) |
| 2201 | goto exit; |
| 2202 | |
| 2203 | serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, |
| 2204 | USB_DIR_IN); |
| 2205 | if (!serial->in_endp) { |
| 2206 | dev_err(&interface->dev, "Failed to find BULK IN ep\n"); |
| 2207 | goto exit; |
| 2208 | } |
| 2209 | |
| 2210 | if (! |
| 2211 | (serial->out_endp = |
| 2212 | hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { |
| 2213 | dev_err(&interface->dev, "Failed to find BULK IN ep\n"); |
| 2214 | goto exit; |
| 2215 | } |
| 2216 | |
| 2217 | serial->write_data = hso_std_serial_write_data; |
| 2218 | |
| 2219 | /* and record this serial */ |
| 2220 | set_serial_by_index(serial->minor, serial); |
| 2221 | |
| 2222 | /* setup the proc dirs and files if needed */ |
| 2223 | hso_log_port(hso_dev); |
| 2224 | |
| 2225 | /* done, return it */ |
| 2226 | return hso_dev; |
| 2227 | exit: |
| 2228 | if (hso_dev && serial) |
| 2229 | hso_serial_common_free(serial); |
| 2230 | kfree(serial); |
| 2231 | hso_free_device(hso_dev); |
| 2232 | return NULL; |
| 2233 | } |
| 2234 | |
| 2235 | /* Creates a multiplexed AT channel */ |
| 2236 | static |
| 2237 | struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, |
| 2238 | int port, |
| 2239 | struct hso_shared_int *mux) |
| 2240 | { |
| 2241 | struct hso_device *hso_dev; |
| 2242 | struct hso_serial *serial; |
| 2243 | int port_spec; |
| 2244 | |
| 2245 | port_spec = HSO_INTF_MUX; |
| 2246 | port_spec &= ~HSO_PORT_MASK; |
| 2247 | |
| 2248 | port_spec |= hso_mux_to_port(port); |
| 2249 | if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) |
| 2250 | return NULL; |
| 2251 | |
| 2252 | hso_dev = hso_create_device(interface, port_spec); |
| 2253 | if (!hso_dev) |
| 2254 | return NULL; |
| 2255 | |
| 2256 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
| 2257 | if (!serial) |
| 2258 | goto exit; |
| 2259 | |
| 2260 | hso_dev->port_data.dev_serial = serial; |
| 2261 | serial->parent = hso_dev; |
| 2262 | |
| 2263 | if (hso_serial_common_create |
| 2264 | (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) |
| 2265 | goto exit; |
| 2266 | |
| 2267 | serial->tx_data_length--; |
| 2268 | serial->write_data = hso_mux_serial_write_data; |
| 2269 | |
| 2270 | serial->shared_int = mux; |
| 2271 | mutex_lock(&serial->shared_int->shared_int_lock); |
| 2272 | serial->shared_int->ref_count++; |
| 2273 | mutex_unlock(&serial->shared_int->shared_int_lock); |
| 2274 | |
| 2275 | /* and record this serial */ |
| 2276 | set_serial_by_index(serial->minor, serial); |
| 2277 | |
| 2278 | /* setup the proc dirs and files if needed */ |
| 2279 | hso_log_port(hso_dev); |
| 2280 | |
| 2281 | /* done, return it */ |
| 2282 | return hso_dev; |
| 2283 | |
| 2284 | exit: |
| 2285 | if (serial) { |
| 2286 | tty_unregister_device(tty_drv, serial->minor); |
| 2287 | kfree(serial); |
| 2288 | } |
| 2289 | if (hso_dev) |
| 2290 | hso_free_device(hso_dev); |
| 2291 | return NULL; |
| 2292 | |
| 2293 | } |
| 2294 | |
| 2295 | static void hso_free_shared_int(struct hso_shared_int *mux) |
| 2296 | { |
| 2297 | usb_free_urb(mux->shared_intr_urb); |
| 2298 | kfree(mux->shared_intr_buf); |
| 2299 | mutex_unlock(&mux->shared_int_lock); |
| 2300 | kfree(mux); |
| 2301 | } |
| 2302 | |
| 2303 | static |
| 2304 | struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) |
| 2305 | { |
| 2306 | struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); |
| 2307 | |
| 2308 | if (!mux) |
| 2309 | return NULL; |
| 2310 | |
| 2311 | mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, |
| 2312 | USB_DIR_IN); |
| 2313 | if (!mux->intr_endp) { |
| 2314 | dev_err(&interface->dev, "Can't find INT IN endpoint\n"); |
| 2315 | goto exit; |
| 2316 | } |
| 2317 | |
| 2318 | mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 2319 | if (!mux->shared_intr_urb) { |
| 2320 | dev_err(&interface->dev, "Could not allocate intr urb?"); |
| 2321 | goto exit; |
| 2322 | } |
| 2323 | mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize, |
| 2324 | GFP_KERNEL); |
| 2325 | if (!mux->shared_intr_buf) { |
| 2326 | dev_err(&interface->dev, "Could not allocate intr buf?"); |
| 2327 | goto exit; |
| 2328 | } |
| 2329 | |
| 2330 | mutex_init(&mux->shared_int_lock); |
| 2331 | |
| 2332 | return mux; |
| 2333 | |
| 2334 | exit: |
| 2335 | kfree(mux->shared_intr_buf); |
| 2336 | usb_free_urb(mux->shared_intr_urb); |
| 2337 | kfree(mux); |
| 2338 | return NULL; |
| 2339 | } |
| 2340 | |
| 2341 | /* Gets the port spec for a certain interface */ |
| 2342 | static int hso_get_config_data(struct usb_interface *interface) |
| 2343 | { |
| 2344 | struct usb_device *usbdev = interface_to_usbdev(interface); |
| 2345 | u8 config_data[17]; |
| 2346 | u32 if_num = interface->altsetting->desc.bInterfaceNumber; |
| 2347 | s32 result; |
| 2348 | |
| 2349 | if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), |
| 2350 | 0x86, 0xC0, 0, 0, config_data, 17, |
| 2351 | USB_CTRL_SET_TIMEOUT) != 0x11) { |
| 2352 | return -EIO; |
| 2353 | } |
| 2354 | |
| 2355 | switch (config_data[if_num]) { |
| 2356 | case 0x0: |
| 2357 | result = 0; |
| 2358 | break; |
| 2359 | case 0x1: |
| 2360 | result = HSO_PORT_DIAG; |
| 2361 | break; |
| 2362 | case 0x2: |
| 2363 | result = HSO_PORT_GPS; |
| 2364 | break; |
| 2365 | case 0x3: |
| 2366 | result = HSO_PORT_GPS_CONTROL; |
| 2367 | break; |
| 2368 | case 0x4: |
| 2369 | result = HSO_PORT_APP; |
| 2370 | break; |
| 2371 | case 0x5: |
| 2372 | result = HSO_PORT_APP2; |
| 2373 | break; |
| 2374 | case 0x6: |
| 2375 | result = HSO_PORT_CONTROL; |
| 2376 | break; |
| 2377 | case 0x7: |
| 2378 | result = HSO_PORT_NETWORK; |
| 2379 | break; |
| 2380 | case 0x8: |
| 2381 | result = HSO_PORT_MODEM; |
| 2382 | break; |
| 2383 | case 0x9: |
| 2384 | result = HSO_PORT_MSD; |
| 2385 | break; |
| 2386 | case 0xa: |
| 2387 | result = HSO_PORT_PCSC; |
| 2388 | break; |
| 2389 | case 0xb: |
| 2390 | result = HSO_PORT_VOICE; |
| 2391 | break; |
| 2392 | default: |
| 2393 | result = 0; |
| 2394 | } |
| 2395 | |
| 2396 | if (result) |
| 2397 | result |= HSO_INTF_BULK; |
| 2398 | |
| 2399 | if (config_data[16] & 0x1) |
| 2400 | result |= HSO_INFO_CRC_BUG; |
| 2401 | |
| 2402 | return result; |
| 2403 | } |
| 2404 | |
| 2405 | /* called once for each interface upon device insertion */ |
| 2406 | static int hso_probe(struct usb_interface *interface, |
| 2407 | const struct usb_device_id *id) |
| 2408 | { |
| 2409 | int mux, i, if_num, port_spec; |
| 2410 | unsigned char port_mask; |
| 2411 | struct hso_device *hso_dev = NULL; |
| 2412 | struct hso_shared_int *shared_int; |
| 2413 | struct hso_device *tmp_dev = NULL; |
| 2414 | |
| 2415 | if_num = interface->altsetting->desc.bInterfaceNumber; |
| 2416 | |
| 2417 | /* Get the interface/port specification from either driver_info or from |
| 2418 | * the device itself */ |
| 2419 | if (id->driver_info) |
| 2420 | port_spec = ((u32 *)(id->driver_info))[if_num]; |
| 2421 | else |
| 2422 | port_spec = hso_get_config_data(interface); |
| 2423 | |
| 2424 | if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { |
| 2425 | dev_err(&interface->dev, "Not our interface\n"); |
| 2426 | return -ENODEV; |
| 2427 | } |
| 2428 | /* Check if we need to switch to alt interfaces prior to port |
| 2429 | * configuration */ |
| 2430 | if (interface->num_altsetting > 1) |
| 2431 | usb_set_interface(interface_to_usbdev(interface), if_num, 1); |
| 2432 | interface->needs_remote_wakeup = 1; |
| 2433 | |
| 2434 | /* Allocate new hso device(s) */ |
| 2435 | switch (port_spec & HSO_INTF_MASK) { |
| 2436 | case HSO_INTF_MUX: |
| 2437 | if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { |
| 2438 | /* Create the network device */ |
| 2439 | if (!disable_net) { |
| 2440 | hso_dev = hso_create_net_device(interface); |
| 2441 | if (!hso_dev) |
| 2442 | goto exit; |
| 2443 | tmp_dev = hso_dev; |
| 2444 | } |
| 2445 | } |
| 2446 | |
| 2447 | if (hso_get_mux_ports(interface, &port_mask)) |
| 2448 | /* TODO: de-allocate everything */ |
| 2449 | goto exit; |
| 2450 | |
| 2451 | shared_int = hso_create_shared_int(interface); |
| 2452 | if (!shared_int) |
| 2453 | goto exit; |
| 2454 | |
| 2455 | for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { |
| 2456 | if (port_mask & i) { |
| 2457 | hso_dev = hso_create_mux_serial_device( |
| 2458 | interface, i, shared_int); |
| 2459 | if (!hso_dev) |
| 2460 | goto exit; |
| 2461 | } |
| 2462 | } |
| 2463 | |
| 2464 | if (tmp_dev) |
| 2465 | hso_dev = tmp_dev; |
| 2466 | break; |
| 2467 | |
| 2468 | case HSO_INTF_BULK: |
| 2469 | /* It's a regular bulk interface */ |
| 2470 | if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) |
| 2471 | && !disable_net) |
| 2472 | hso_dev = hso_create_net_device(interface); |
| 2473 | else |
| 2474 | hso_dev = |
| 2475 | hso_create_bulk_serial_device(interface, port_spec); |
| 2476 | if (!hso_dev) |
| 2477 | goto exit; |
| 2478 | break; |
| 2479 | default: |
| 2480 | goto exit; |
| 2481 | } |
| 2482 | |
| 2483 | usb_driver_claim_interface(&hso_driver, interface, hso_dev); |
| 2484 | |
| 2485 | /* save our data pointer in this device */ |
| 2486 | usb_set_intfdata(interface, hso_dev); |
| 2487 | |
| 2488 | /* done */ |
| 2489 | return 0; |
| 2490 | exit: |
| 2491 | hso_free_interface(interface); |
| 2492 | return -ENODEV; |
| 2493 | } |
| 2494 | |
| 2495 | /* device removed, cleaning up */ |
| 2496 | static void hso_disconnect(struct usb_interface *interface) |
| 2497 | { |
| 2498 | hso_free_interface(interface); |
| 2499 | |
| 2500 | /* remove reference of our private data */ |
| 2501 | usb_set_intfdata(interface, NULL); |
| 2502 | |
| 2503 | usb_driver_release_interface(&hso_driver, interface); |
| 2504 | } |
| 2505 | |
| 2506 | static void async_get_intf(struct work_struct *data) |
| 2507 | { |
| 2508 | struct hso_device *hso_dev = |
| 2509 | container_of(data, struct hso_device, async_get_intf); |
| 2510 | usb_autopm_get_interface(hso_dev->interface); |
| 2511 | } |
| 2512 | |
| 2513 | static void async_put_intf(struct work_struct *data) |
| 2514 | { |
| 2515 | struct hso_device *hso_dev = |
| 2516 | container_of(data, struct hso_device, async_put_intf); |
| 2517 | usb_autopm_put_interface(hso_dev->interface); |
| 2518 | } |
| 2519 | |
| 2520 | static int hso_get_activity(struct hso_device *hso_dev) |
| 2521 | { |
| 2522 | if (hso_dev->usb->state == USB_STATE_SUSPENDED) { |
| 2523 | if (!hso_dev->is_active) { |
| 2524 | hso_dev->is_active = 1; |
| 2525 | schedule_work(&hso_dev->async_get_intf); |
| 2526 | } |
| 2527 | } |
| 2528 | |
| 2529 | if (hso_dev->usb->state != USB_STATE_CONFIGURED) |
| 2530 | return -EAGAIN; |
| 2531 | |
| 2532 | usb_mark_last_busy(hso_dev->usb); |
| 2533 | |
| 2534 | return 0; |
| 2535 | } |
| 2536 | |
| 2537 | static int hso_put_activity(struct hso_device *hso_dev) |
| 2538 | { |
| 2539 | if (hso_dev->usb->state != USB_STATE_SUSPENDED) { |
| 2540 | if (hso_dev->is_active) { |
| 2541 | hso_dev->is_active = 0; |
| 2542 | schedule_work(&hso_dev->async_put_intf); |
| 2543 | return -EAGAIN; |
| 2544 | } |
| 2545 | } |
| 2546 | hso_dev->is_active = 0; |
| 2547 | return 0; |
| 2548 | } |
| 2549 | |
| 2550 | /* called by kernel when we need to suspend device */ |
| 2551 | static int hso_suspend(struct usb_interface *iface, pm_message_t message) |
| 2552 | { |
| 2553 | int i, result; |
| 2554 | |
| 2555 | /* Stop all serial ports */ |
| 2556 | for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { |
| 2557 | if (serial_table[i] && (serial_table[i]->interface == iface)) { |
| 2558 | result = hso_stop_serial_device(serial_table[i]); |
| 2559 | if (result) |
| 2560 | goto out; |
| 2561 | } |
| 2562 | } |
| 2563 | |
| 2564 | /* Stop all network ports */ |
| 2565 | for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { |
| 2566 | if (network_table[i] && |
| 2567 | (network_table[i]->interface == iface)) { |
| 2568 | result = hso_stop_net_device(network_table[i]); |
| 2569 | if (result) |
| 2570 | goto out; |
| 2571 | } |
| 2572 | } |
| 2573 | |
| 2574 | out: |
| 2575 | return 0; |
| 2576 | } |
| 2577 | |
| 2578 | /* called by kernel when we need to resume device */ |
| 2579 | static int hso_resume(struct usb_interface *iface) |
| 2580 | { |
| 2581 | int i, result = 0; |
| 2582 | struct hso_net *hso_net; |
| 2583 | |
| 2584 | /* Start all serial ports */ |
| 2585 | for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { |
| 2586 | if (serial_table[i] && (serial_table[i]->interface == iface)) { |
| 2587 | if (dev2ser(serial_table[i])->open_count) { |
| 2588 | result = |
| 2589 | hso_start_serial_device(serial_table[i], GFP_NOIO); |
| 2590 | hso_kick_transmit(dev2ser(serial_table[i])); |
| 2591 | if (result) |
| 2592 | goto out; |
| 2593 | } |
| 2594 | } |
| 2595 | } |
| 2596 | |
| 2597 | /* Start all network ports */ |
| 2598 | for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { |
| 2599 | if (network_table[i] && |
| 2600 | (network_table[i]->interface == iface)) { |
| 2601 | hso_net = dev2net(network_table[i]); |
| 2602 | /* First transmit any lingering data, then restart the |
| 2603 | * device. */ |
| 2604 | if (hso_net->skb_tx_buf) { |
| 2605 | dev_dbg(&iface->dev, |
| 2606 | "Transmitting lingering data\n"); |
| 2607 | hso_net_start_xmit(hso_net->skb_tx_buf, |
| 2608 | hso_net->net); |
| 2609 | } |
| 2610 | result = hso_start_net_device(network_table[i]); |
| 2611 | if (result) |
| 2612 | goto out; |
| 2613 | } |
| 2614 | } |
| 2615 | |
| 2616 | out: |
| 2617 | return result; |
| 2618 | } |
| 2619 | |
| 2620 | static void hso_serial_ref_free(struct kref *ref) |
| 2621 | { |
| 2622 | struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); |
| 2623 | |
| 2624 | hso_free_serial_device(hso_dev); |
| 2625 | } |
| 2626 | |
| 2627 | static void hso_free_interface(struct usb_interface *interface) |
| 2628 | { |
| 2629 | struct hso_serial *hso_dev; |
| 2630 | int i; |
| 2631 | |
| 2632 | for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { |
| 2633 | if (serial_table[i] |
| 2634 | && (serial_table[i]->interface == interface)) { |
| 2635 | hso_dev = dev2ser(serial_table[i]); |
| 2636 | if (hso_dev->tty) |
| 2637 | tty_hangup(hso_dev->tty); |
| 2638 | mutex_lock(&hso_dev->parent->mutex); |
| 2639 | hso_dev->parent->usb_gone = 1; |
| 2640 | mutex_unlock(&hso_dev->parent->mutex); |
| 2641 | kref_put(&serial_table[i]->ref, hso_serial_ref_free); |
| 2642 | } |
| 2643 | } |
| 2644 | |
| 2645 | for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { |
| 2646 | if (network_table[i] |
| 2647 | && (network_table[i]->interface == interface)) { |
| 2648 | struct rfkill *rfk = dev2net(network_table[i])->rfkill; |
| 2649 | /* hso_stop_net_device doesn't stop the net queue since |
| 2650 | * traffic needs to start it again when suspended */ |
| 2651 | netif_stop_queue(dev2net(network_table[i])->net); |
| 2652 | hso_stop_net_device(network_table[i]); |
| 2653 | cancel_work_sync(&network_table[i]->async_put_intf); |
| 2654 | cancel_work_sync(&network_table[i]->async_get_intf); |
| 2655 | if(rfk) |
| 2656 | rfkill_unregister(rfk); |
| 2657 | hso_free_net_device(network_table[i]); |
| 2658 | } |
| 2659 | } |
| 2660 | } |
| 2661 | |
| 2662 | /* Helper functions */ |
| 2663 | |
| 2664 | /* Get the endpoint ! */ |
| 2665 | static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, |
| 2666 | int type, int dir) |
| 2667 | { |
| 2668 | int i; |
| 2669 | struct usb_host_interface *iface = intf->cur_altsetting; |
| 2670 | struct usb_endpoint_descriptor *endp; |
| 2671 | |
| 2672 | for (i = 0; i < iface->desc.bNumEndpoints; i++) { |
| 2673 | endp = &iface->endpoint[i].desc; |
| 2674 | if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && |
| 2675 | ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == type)) |
| 2676 | return endp; |
| 2677 | } |
| 2678 | |
| 2679 | return NULL; |
| 2680 | } |
| 2681 | |
| 2682 | /* Get the byte that describes which ports are enabled */ |
| 2683 | static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) |
| 2684 | { |
| 2685 | int i; |
| 2686 | struct usb_host_interface *iface = intf->cur_altsetting; |
| 2687 | |
| 2688 | if (iface->extralen == 3) { |
| 2689 | *ports = iface->extra[2]; |
| 2690 | return 0; |
| 2691 | } |
| 2692 | |
| 2693 | for (i = 0; i < iface->desc.bNumEndpoints; i++) { |
| 2694 | if (iface->endpoint[i].extralen == 3) { |
| 2695 | *ports = iface->endpoint[i].extra[2]; |
| 2696 | return 0; |
| 2697 | } |
| 2698 | } |
| 2699 | |
| 2700 | return -1; |
| 2701 | } |
| 2702 | |
| 2703 | /* interrupt urb needs to be submitted, used for serial read of muxed port */ |
| 2704 | static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, |
| 2705 | struct usb_device *usb, gfp_t gfp) |
| 2706 | { |
| 2707 | int result; |
| 2708 | |
| 2709 | usb_fill_int_urb(shared_int->shared_intr_urb, usb, |
| 2710 | usb_rcvintpipe(usb, |
| 2711 | shared_int->intr_endp->bEndpointAddress & 0x7F), |
| 2712 | shared_int->shared_intr_buf, |
| 2713 | shared_int->intr_endp->wMaxPacketSize, |
| 2714 | intr_callback, shared_int, |
| 2715 | shared_int->intr_endp->bInterval); |
| 2716 | |
| 2717 | result = usb_submit_urb(shared_int->shared_intr_urb, gfp); |
| 2718 | if (result) |
| 2719 | dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__, |
| 2720 | result); |
| 2721 | |
| 2722 | return result; |
| 2723 | } |
| 2724 | |
| 2725 | /* operations setup of the serial interface */ |
| 2726 | static struct tty_operations hso_serial_ops = { |
| 2727 | .open = hso_serial_open, |
| 2728 | .close = hso_serial_close, |
| 2729 | .write = hso_serial_write, |
| 2730 | .write_room = hso_serial_write_room, |
| 2731 | .set_termios = hso_serial_set_termios, |
| 2732 | .chars_in_buffer = hso_serial_chars_in_buffer, |
| 2733 | .tiocmget = hso_serial_tiocmget, |
| 2734 | .tiocmset = hso_serial_tiocmset, |
| 2735 | }; |
| 2736 | |
| 2737 | static struct usb_driver hso_driver = { |
| 2738 | .name = driver_name, |
| 2739 | .probe = hso_probe, |
| 2740 | .disconnect = hso_disconnect, |
| 2741 | .id_table = hso_ids, |
| 2742 | .suspend = hso_suspend, |
| 2743 | .resume = hso_resume, |
| 2744 | .supports_autosuspend = 1, |
| 2745 | }; |
| 2746 | |
| 2747 | static int __init hso_init(void) |
| 2748 | { |
| 2749 | int i; |
| 2750 | int result; |
| 2751 | |
| 2752 | /* put it in the log */ |
| 2753 | printk(KERN_INFO "hso: %s\n", version); |
| 2754 | |
| 2755 | /* Initialise the serial table semaphore and table */ |
| 2756 | spin_lock_init(&serial_table_lock); |
| 2757 | for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) |
| 2758 | serial_table[i] = NULL; |
| 2759 | |
| 2760 | /* allocate our driver using the proper amount of supported minors */ |
| 2761 | tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); |
| 2762 | if (!tty_drv) |
| 2763 | return -ENOMEM; |
| 2764 | |
| 2765 | /* fill in all needed values */ |
| 2766 | tty_drv->magic = TTY_DRIVER_MAGIC; |
| 2767 | tty_drv->owner = THIS_MODULE; |
| 2768 | tty_drv->driver_name = driver_name; |
| 2769 | tty_drv->name = tty_filename; |
| 2770 | |
| 2771 | /* if major number is provided as parameter, use that one */ |
| 2772 | if (tty_major) |
| 2773 | tty_drv->major = tty_major; |
| 2774 | |
| 2775 | tty_drv->minor_start = 0; |
| 2776 | tty_drv->num = HSO_SERIAL_TTY_MINORS; |
| 2777 | tty_drv->type = TTY_DRIVER_TYPE_SERIAL; |
| 2778 | tty_drv->subtype = SERIAL_TYPE_NORMAL; |
| 2779 | tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
| 2780 | tty_drv->init_termios = tty_std_termios; |
| 2781 | tty_drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
| 2782 | tty_drv->termios = hso_serial_termios; |
| 2783 | tty_drv->termios_locked = hso_serial_termios_locked; |
| 2784 | tty_set_operations(tty_drv, &hso_serial_ops); |
| 2785 | |
| 2786 | /* register the tty driver */ |
| 2787 | result = tty_register_driver(tty_drv); |
| 2788 | if (result) { |
| 2789 | printk(KERN_ERR "%s - tty_register_driver failed(%d)\n", |
| 2790 | __func__, result); |
| 2791 | return result; |
| 2792 | } |
| 2793 | |
| 2794 | /* register this module as an usb driver */ |
| 2795 | result = usb_register(&hso_driver); |
| 2796 | if (result) { |
| 2797 | printk(KERN_ERR "Could not register hso driver? error: %d\n", |
| 2798 | result); |
| 2799 | /* cleanup serial interface */ |
| 2800 | tty_unregister_driver(tty_drv); |
| 2801 | return result; |
| 2802 | } |
| 2803 | |
| 2804 | /* done */ |
| 2805 | return 0; |
| 2806 | } |
| 2807 | |
| 2808 | static void __exit hso_exit(void) |
| 2809 | { |
| 2810 | printk(KERN_INFO "hso: unloaded\n"); |
| 2811 | |
| 2812 | tty_unregister_driver(tty_drv); |
| 2813 | /* deregister the usb driver */ |
| 2814 | usb_deregister(&hso_driver); |
| 2815 | } |
| 2816 | |
| 2817 | /* Module definitions */ |
| 2818 | module_init(hso_init); |
| 2819 | module_exit(hso_exit); |
| 2820 | |
| 2821 | MODULE_AUTHOR(MOD_AUTHOR); |
| 2822 | MODULE_DESCRIPTION(MOD_DESCRIPTION); |
| 2823 | MODULE_LICENSE(MOD_LICENSE); |
| 2824 | MODULE_INFO(Version, DRIVER_VERSION); |
| 2825 | |
| 2826 | /* change the debug level (eg: insmod hso.ko debug=0x04) */ |
| 2827 | MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); |
| 2828 | module_param(debug, int, S_IRUGO | S_IWUSR); |
| 2829 | |
| 2830 | /* set the major tty number (eg: insmod hso.ko tty_major=245) */ |
| 2831 | MODULE_PARM_DESC(tty_major, "Set the major tty number"); |
| 2832 | module_param(tty_major, int, S_IRUGO | S_IWUSR); |
| 2833 | |
| 2834 | /* disable network interface (eg: insmod hso.ko disable_net=1) */ |
| 2835 | MODULE_PARM_DESC(disable_net, "Disable the network interface"); |
| 2836 | module_param(disable_net, int, S_IRUGO | S_IWUSR); |