Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 1 | /* |
| 2 | * This code was developed for the Quatech USB line for linux, it used |
| 3 | * much of the code developed by Greg Kroah-Hartman for USB serial devices |
| 4 | * |
| 5 | */ |
| 6 | |
| 7 | #include <linux/errno.h> |
| 8 | #include <linux/init.h> |
| 9 | #include <linux/slab.h> |
| 10 | #include <linux/tty.h> |
| 11 | #include <linux/tty_driver.h> |
| 12 | #include <linux/tty_flip.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/serial.h> |
| 15 | #include <linux/usb.h> |
| 16 | #include <linux/usb/serial.h> |
| 17 | #include <linux/uaccess.h> |
| 18 | |
| 19 | static int debug; |
| 20 | |
| 21 | /* Version Information */ |
| 22 | #define DRIVER_VERSION "v2.14" |
| 23 | #define DRIVER_AUTHOR "Tim Gobeli, Quatech, Inc" |
| 24 | #define DRIVER_DESC "Quatech USB to Serial Driver" |
| 25 | |
| 26 | #define USB_VENDOR_ID_QUATECH 0x061d /* Quatech VID */ |
| 27 | #define QUATECH_SSU100 0xC020 /* SSU100 */ |
| 28 | #define QUATECH_SSU200 0xC030 /* SSU200 */ |
| 29 | #define QUATECH_DSU100 0xC040 /* DSU100 */ |
| 30 | #define QUATECH_DSU200 0xC050 /* DSU200 */ |
| 31 | #define QUATECH_QSU100 0xC060 /* QSU100 */ |
| 32 | #define QUATECH_QSU200 0xC070 /* QSU200 */ |
| 33 | #define QUATECH_ESU100A 0xC080 /* ESU100A */ |
| 34 | #define QUATECH_ESU100B 0xC081 /* ESU100B */ |
| 35 | #define QUATECH_ESU200A 0xC0A0 /* ESU200A */ |
| 36 | #define QUATECH_ESU200B 0xC0A1 /* ESU200B */ |
| 37 | #define QUATECH_HSU100A 0xC090 /* HSU100A */ |
| 38 | #define QUATECH_HSU100B 0xC091 /* HSU100B */ |
| 39 | #define QUATECH_HSU100C 0xC092 /* HSU100C */ |
| 40 | #define QUATECH_HSU100D 0xC093 /* HSU100D */ |
| 41 | #define QUATECH_HSU200A 0xC0B0 /* HSU200A */ |
| 42 | #define QUATECH_HSU200B 0xC0B1 /* HSU200B */ |
| 43 | #define QUATECH_HSU200C 0xC0B2 /* HSU200C */ |
| 44 | #define QUATECH_HSU200D 0xC0B3 /* HSU200D */ |
| 45 | #define QUATECH_SSU100_2 0xC120 /* SSU100_2 */ |
| 46 | #define QUATECH_DSU100_2 0xC140 /* DSU100_2 */ |
| 47 | #define QUATECH_DSU400_2 0xC150 /* DSU400_2 */ |
| 48 | #define QUATECH_QSU100_2 0xC160 /* QSU100_2 */ |
| 49 | #define QUATECH_QSU400_2 0xC170 /* QSU400_2 */ |
| 50 | #define QUATECH_ESU400_2 0xC180 /* ESU400_2 */ |
| 51 | #define QUATECH_ESU100_2 0xC1A0 /* ESU100_2 */ |
| 52 | |
| 53 | #define QT_SET_GET_DEVICE 0xc2 |
| 54 | #define QT_OPEN_CLOSE_CHANNEL 0xca |
| 55 | #define QT_GET_SET_PREBUF_TRIG_LVL 0xcc |
| 56 | #define QT_SET_ATF 0xcd |
| 57 | #define QT_GET_SET_REGISTER 0xc0 |
| 58 | #define QT_GET_SET_UART 0xc1 |
| 59 | #define QT_HW_FLOW_CONTROL_MASK 0xc5 |
| 60 | #define QT_SW_FLOW_CONTROL_MASK 0xc6 |
| 61 | #define QT_SW_FLOW_CONTROL_DISABLE 0xc7 |
| 62 | #define QT_BREAK_CONTROL 0xc8 |
| 63 | |
| 64 | #define USBD_TRANSFER_DIRECTION_IN 0xc0 |
| 65 | #define USBD_TRANSFER_DIRECTION_OUT 0x40 |
| 66 | |
| 67 | #define MAX_BAUD_RATE 460800 |
| 68 | #define MAX_BAUD_REMAINDER 4608 |
| 69 | |
| 70 | #define DIV_LATCH_LS 0x00 |
| 71 | #define XMT_HOLD_REGISTER 0x00 |
| 72 | #define XVR_BUFFER_REGISTER 0x00 |
| 73 | #define DIV_LATCH_MS 0x01 |
| 74 | #define FIFO_CONTROL_REGISTER 0x02 |
| 75 | #define LINE_CONTROL_REGISTER 0x03 |
| 76 | #define MODEM_CONTROL_REGISTER 0x04 |
| 77 | #define LINE_STATUS_REGISTER 0x05 |
| 78 | #define MODEM_STATUS_REGISTER 0x06 |
| 79 | |
| 80 | #define SERIAL_MCR_DTR 0x01 |
| 81 | #define SERIAL_MCR_RTS 0x02 |
| 82 | #define SERIAL_MCR_LOOP 0x10 |
| 83 | |
| 84 | #define SERIAL_MSR_CTS 0x10 |
| 85 | #define SERIAL_MSR_CD 0x80 |
| 86 | #define SERIAL_MSR_RI 0x40 |
| 87 | #define SERIAL_MSR_DSR 0x20 |
| 88 | #define SERIAL_MSR_MASK 0xf0 |
| 89 | |
| 90 | #define SERIAL_8_DATA 0x03 |
| 91 | #define SERIAL_7_DATA 0x02 |
| 92 | #define SERIAL_6_DATA 0x01 |
| 93 | #define SERIAL_5_DATA 0x00 |
| 94 | |
| 95 | #define SERIAL_ODD_PARITY 0X08 |
| 96 | #define SERIAL_EVEN_PARITY 0X18 |
| 97 | #define SERIAL_TWO_STOPB 0x04 |
| 98 | #define SERIAL_ONE_STOPB 0x00 |
| 99 | |
| 100 | #define DEFAULT_DIVISOR 0x30 /* gives 9600 baud rate */ |
| 101 | #define DEFAULT_LCR SERIAL_8_DATA /* 8, none , 1 */ |
| 102 | |
| 103 | #define FULLPWRBIT 0x00000080 |
| 104 | #define NEXT_BOARD_POWER_BIT 0x00000004 |
| 105 | |
| 106 | #define SERIAL_LSR_OE 0x02 |
| 107 | #define SERIAL_LSR_PE 0x04 |
| 108 | #define SERIAL_LSR_FE 0x08 |
| 109 | #define SERIAL_LSR_BI 0x10 |
| 110 | |
| 111 | #define SERIAL_MSR_CTS 0x10 |
| 112 | #define SERIAL_MSR_CD 0x80 |
| 113 | #define SERIAL_MSR_RI 0x40 |
| 114 | #define SERIAL_MSR_DSR 0x20 |
| 115 | #define SERIAL_MSR_MASK 0xf0 |
| 116 | |
| 117 | #define PREFUFF_LEVEL_CONSERVATIVE 128 |
| 118 | #define ATC_DISABLED 0x0 |
| 119 | |
| 120 | #define RR_BITS 0x03 /* for clearing clock bits */ |
| 121 | #define DUPMODE_BITS 0xc0 |
| 122 | #define CLKS_X4 0x02 |
| 123 | |
| 124 | #define LOOPMODE_BITS 0x41 /* LOOP1 = b6, LOOP0 = b0 (PORT B) */ |
| 125 | #define ALL_LOOPBACK 0x01 |
| 126 | #define MODEM_CTRL 0x40 |
| 127 | #define RS232_MODE 0x00 |
| 128 | |
| 129 | static struct usb_device_id serqt_id_table[] = { |
| 130 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100)}, |
| 131 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU200)}, |
| 132 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU100)}, |
| 133 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU200)}, |
| 134 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU100)}, |
| 135 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU200)}, |
| 136 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU100A)}, |
| 137 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU100B)}, |
| 138 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU200A)}, |
| 139 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU200B)}, |
| 140 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100A)}, |
| 141 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100B)}, |
| 142 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100C)}, |
| 143 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU100D)}, |
| 144 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200A)}, |
| 145 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200B)}, |
| 146 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200C)}, |
| 147 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_HSU200D)}, |
| 148 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100_2)}, |
| 149 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU100_2)}, |
| 150 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_DSU400_2)}, |
| 151 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU100_2)}, |
| 152 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_QSU400_2)}, |
| 153 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU400_2)}, |
| 154 | {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_ESU100_2)}, |
| 155 | {} /* Terminating entry */ |
| 156 | }; |
| 157 | |
| 158 | MODULE_DEVICE_TABLE(usb, serqt_id_table); |
| 159 | |
| 160 | struct qt_get_device_data { |
| 161 | __u8 porta; |
| 162 | __u8 portb; |
| 163 | __u8 portc; |
| 164 | }; |
| 165 | |
| 166 | struct qt_open_channel_data { |
| 167 | __u8 line_status; |
| 168 | __u8 modem_status; |
| 169 | }; |
| 170 | |
| 171 | struct quatech_port { |
| 172 | int port_num; /* number of the port */ |
| 173 | struct urb *write_urb; /* write URB for this port */ |
| 174 | struct urb *read_urb; /* read URB for this port */ |
| 175 | struct urb *int_urb; |
| 176 | |
| 177 | __u8 shadowLCR; /* last LCR value received */ |
| 178 | __u8 shadowMCR; /* last MCR value received */ |
| 179 | __u8 shadowMSR; /* last MSR value received */ |
| 180 | __u8 shadowLSR; /* last LSR value received */ |
| 181 | char open_ports; |
| 182 | |
| 183 | /* Used for TIOCMIWAIT */ |
| 184 | wait_queue_head_t msr_wait; |
| 185 | char prev_status, diff_status; |
| 186 | |
| 187 | wait_queue_head_t wait; |
| 188 | |
| 189 | struct async_icount icount; |
| 190 | |
| 191 | struct usb_serial_port *port; /* owner of this object */ |
| 192 | struct qt_get_device_data DeviceData; |
| 193 | spinlock_t lock; |
| 194 | bool read_urb_busy; |
| 195 | int RxHolding; |
| 196 | int ReadBulkStopped; |
| 197 | char closePending; |
| 198 | }; |
| 199 | |
| 200 | static struct usb_driver serqt_usb_driver = { |
| 201 | .name = "quatech-usb-serial", |
| 202 | .probe = usb_serial_probe, |
| 203 | .disconnect = usb_serial_disconnect, |
| 204 | .id_table = serqt_id_table, |
| 205 | .no_dynamic_id = 1, |
| 206 | }; |
| 207 | |
| 208 | static int port_paranoia_check(struct usb_serial_port *port, |
| 209 | const char *function) |
| 210 | { |
| 211 | if (!port) { |
| 212 | dbg("%s - port == NULL", function); |
| 213 | return -1; |
| 214 | } |
| 215 | if (!port->serial) { |
| 216 | dbg("%s - port->serial == NULL\n", function); |
| 217 | return -1; |
| 218 | } |
| 219 | |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | static int serial_paranoia_check(struct usb_serial *serial, |
| 224 | const char *function) |
| 225 | { |
| 226 | if (!serial) { |
| 227 | dbg("%s - serial == NULL\n", function); |
| 228 | return -1; |
| 229 | } |
| 230 | |
| 231 | if (!serial->type) { |
| 232 | dbg("%s - serial->type == NULL!", function); |
| 233 | return -1; |
| 234 | } |
| 235 | |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | static inline struct quatech_port *qt_get_port_private(struct usb_serial_port |
| 240 | *port) |
| 241 | { |
| 242 | return (struct quatech_port *)usb_get_serial_port_data(port); |
| 243 | } |
| 244 | |
| 245 | static inline void qt_set_port_private(struct usb_serial_port *port, |
| 246 | struct quatech_port *data) |
| 247 | { |
| 248 | usb_set_serial_port_data(port, (void *)data); |
| 249 | } |
| 250 | |
| 251 | static struct usb_serial *get_usb_serial(struct usb_serial_port *port, |
| 252 | const char *function) |
| 253 | { |
| 254 | /* if no port was specified, or it fails a paranoia check */ |
| 255 | if (!port || |
| 256 | port_paranoia_check(port, function) || |
| 257 | serial_paranoia_check(port->serial, function)) { |
| 258 | /* |
| 259 | * then say that we dont have a valid usb_serial thing, |
| 260 | * which will end up genrating -ENODEV return values |
| 261 | */ |
| 262 | return NULL; |
| 263 | } |
| 264 | |
| 265 | return port->serial; |
| 266 | } |
| 267 | |
| 268 | static void ProcessLineStatus(struct quatech_port *qt_port, |
| 269 | unsigned char line_status) |
| 270 | { |
| 271 | |
| 272 | qt_port->shadowLSR = |
| 273 | line_status & (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE | |
| 274 | SERIAL_LSR_BI); |
| 275 | return; |
| 276 | } |
| 277 | |
| 278 | static void ProcessModemStatus(struct quatech_port *qt_port, |
| 279 | unsigned char modem_status) |
| 280 | { |
| 281 | |
| 282 | qt_port->shadowMSR = modem_status; |
| 283 | wake_up_interruptible(&qt_port->wait); |
| 284 | return; |
| 285 | } |
| 286 | |
Alan Cox | 94362fd | 2009-06-22 18:42:36 +0100 | [diff] [blame] | 287 | static void ProcessRxChar(struct tty_struct *tty, struct usb_serial_port *port, |
| 288 | unsigned char data) |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 289 | { |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 290 | struct urb *urb = port->read_urb; |
Alan Cox | 94362fd | 2009-06-22 18:42:36 +0100 | [diff] [blame] | 291 | if (urb->actual_length) |
| 292 | tty_insert_flip_char(tty, data, TTY_NORMAL); |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 293 | } |
| 294 | |
| 295 | static void qt_write_bulk_callback(struct urb *urb) |
| 296 | { |
| 297 | struct tty_struct *tty; |
| 298 | int status; |
| 299 | struct quatech_port *quatech_port; |
| 300 | |
| 301 | status = urb->status; |
| 302 | |
| 303 | if (status) { |
| 304 | dbg("nonzero write bulk status received:%d\n", status); |
| 305 | return; |
| 306 | } |
| 307 | |
| 308 | quatech_port = urb->context; |
| 309 | |
| 310 | dbg("%s - port %d\n", __func__, quatech_port->port_num); |
| 311 | |
| 312 | tty = tty_port_tty_get(&quatech_port->port->port); |
| 313 | |
| 314 | if (tty) |
| 315 | tty_wakeup(tty); |
| 316 | tty_kref_put(tty); |
| 317 | } |
| 318 | |
| 319 | static void qt_interrupt_callback(struct urb *urb) |
| 320 | { |
| 321 | /* FIXME */ |
| 322 | } |
| 323 | |
| 324 | static void qt_read_bulk_callback(struct urb *urb) |
| 325 | { |
| 326 | |
| 327 | struct usb_serial_port *port = urb->context; |
| 328 | struct usb_serial *serial = get_usb_serial(port, __func__); |
| 329 | struct quatech_port *qt_port = qt_get_port_private(port); |
| 330 | unsigned char *data; |
| 331 | struct tty_struct *tty; |
| 332 | unsigned int index; |
| 333 | unsigned int RxCount; |
| 334 | int i, result; |
| 335 | int flag, flag_data; |
| 336 | |
| 337 | if (urb->status) { |
| 338 | qt_port->ReadBulkStopped = 1; |
| 339 | dbg("%s - nonzero write bulk status received: %d\n", |
| 340 | __func__, urb->status); |
| 341 | return; |
| 342 | } |
| 343 | |
| 344 | tty = tty_port_tty_get(&port->port); |
| 345 | if (!tty) { |
| 346 | dbg("%s - bad tty pointer - exiting", __func__); |
| 347 | return; |
| 348 | } |
| 349 | |
| 350 | data = urb->transfer_buffer; |
| 351 | |
| 352 | RxCount = urb->actual_length; |
| 353 | |
| 354 | /* index = MINOR(port->tty->device) - serial->minor; */ |
| 355 | index = tty->index - serial->minor; |
| 356 | |
| 357 | dbg("%s - port %d\n", __func__, port->number); |
| 358 | dbg("%s - port->RxHolding = %d\n", __func__, qt_port->RxHolding); |
| 359 | |
| 360 | if (port_paranoia_check(port, __func__) != 0) { |
| 361 | dbg("%s - port_paranoia_check, exiting\n", __func__); |
| 362 | qt_port->ReadBulkStopped = 1; |
Bill Pemberton | f3a7568 | 2009-07-14 15:33:52 -0400 | [diff] [blame] | 363 | goto exit; |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | if (!serial) { |
| 367 | dbg("%s - bad serial pointer, exiting\n", __func__); |
Bill Pemberton | f3a7568 | 2009-07-14 15:33:52 -0400 | [diff] [blame] | 368 | goto exit; |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 369 | } |
| 370 | if (qt_port->closePending == 1) { |
| 371 | /* Were closing , stop reading */ |
| 372 | dbg("%s - (qt_port->closepending == 1\n", __func__); |
| 373 | qt_port->ReadBulkStopped = 1; |
Bill Pemberton | f3a7568 | 2009-07-14 15:33:52 -0400 | [diff] [blame] | 374 | goto exit; |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 375 | } |
| 376 | |
| 377 | /* |
| 378 | * RxHolding is asserted by throttle, if we assert it, we're not |
| 379 | * receiving any more characters and let the box handle the flow |
| 380 | * control |
| 381 | */ |
| 382 | if (qt_port->RxHolding == 1) { |
| 383 | qt_port->ReadBulkStopped = 1; |
Bill Pemberton | f3a7568 | 2009-07-14 15:33:52 -0400 | [diff] [blame] | 384 | goto exit; |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 385 | } |
| 386 | |
| 387 | if (urb->status) { |
| 388 | qt_port->ReadBulkStopped = 1; |
| 389 | |
| 390 | dbg("%s - nonzero read bulk status received: %d\n", |
| 391 | __func__, urb->status); |
Bill Pemberton | f3a7568 | 2009-07-14 15:33:52 -0400 | [diff] [blame] | 392 | goto exit; |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 393 | } |
| 394 | |
| 395 | if (tty && RxCount) { |
| 396 | flag_data = 0; |
| 397 | for (i = 0; i < RxCount; ++i) { |
| 398 | /* Look ahead code here */ |
| 399 | if ((i <= (RxCount - 3)) && (data[i] == 0x1b) |
| 400 | && (data[i + 1] == 0x1b)) { |
| 401 | flag = 0; |
| 402 | switch (data[i + 2]) { |
| 403 | case 0x00: |
| 404 | /* line status change 4th byte must follow */ |
| 405 | if (i > (RxCount - 4)) { |
| 406 | dbg("Illegal escape seuences in received data\n"); |
| 407 | break; |
| 408 | } |
| 409 | ProcessLineStatus(qt_port, data[i + 3]); |
| 410 | i += 3; |
| 411 | flag = 1; |
| 412 | break; |
| 413 | |
| 414 | case 0x01: |
| 415 | /* Modem status status change 4th byte must follow */ |
| 416 | dbg("Modem status status. \n"); |
| 417 | if (i > (RxCount - 4)) { |
| 418 | dbg("Illegal escape sequences in received data\n"); |
| 419 | break; |
| 420 | } |
| 421 | ProcessModemStatus(qt_port, |
| 422 | data[i + 3]); |
| 423 | i += 3; |
| 424 | flag = 1; |
| 425 | break; |
| 426 | case 0xff: |
| 427 | dbg("No status sequence. \n"); |
| 428 | |
Alan Cox | 94362fd | 2009-06-22 18:42:36 +0100 | [diff] [blame] | 429 | if (tty) { |
| 430 | ProcessRxChar(tty, port, data[i]); |
| 431 | ProcessRxChar(tty, port, data[i + 1]); |
| 432 | } |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 433 | i += 2; |
| 434 | break; |
| 435 | } |
| 436 | if (flag == 1) |
| 437 | continue; |
| 438 | } |
| 439 | |
Alan Cox | 94362fd | 2009-06-22 18:42:36 +0100 | [diff] [blame] | 440 | if (tty && urb->actual_length) |
| 441 | tty_insert_flip_char(tty, data[i], TTY_NORMAL); |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 442 | |
| 443 | } |
| 444 | tty_flip_buffer_push(tty); |
| 445 | } |
| 446 | |
| 447 | /* Continue trying to always read */ |
| 448 | usb_fill_bulk_urb(port->read_urb, serial->dev, |
| 449 | usb_rcvbulkpipe(serial->dev, |
| 450 | port->bulk_in_endpointAddress), |
| 451 | port->read_urb->transfer_buffer, |
| 452 | port->read_urb->transfer_buffer_length, |
| 453 | qt_read_bulk_callback, port); |
| 454 | result = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
| 455 | if (result) |
| 456 | dbg("%s - failed resubmitting read urb, error %d", |
| 457 | __func__, result); |
| 458 | else { |
| 459 | if (tty && RxCount) { |
| 460 | tty_flip_buffer_push(tty); |
| 461 | tty_schedule_flip(tty); |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | schedule_work(&port->work); |
Bill Pemberton | f3a7568 | 2009-07-14 15:33:52 -0400 | [diff] [blame] | 466 | exit: |
| 467 | tty_kref_put(tty); |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 468 | } |
| 469 | |
| 470 | /* |
| 471 | * qt_get_device |
| 472 | * Issue a GET_DEVICE vendor-specific request on the default control pipe If |
| 473 | * successful, fills in the qt_get_device_data structure pointed to by |
| 474 | * device_data, otherwise return a negative error number of the problem. |
| 475 | */ |
| 476 | |
| 477 | static int qt_get_device(struct usb_serial *serial, |
| 478 | struct qt_get_device_data *device_data) |
| 479 | { |
| 480 | int result; |
| 481 | unsigned char *transfer_buffer; |
| 482 | |
| 483 | transfer_buffer = |
| 484 | kmalloc(sizeof(struct qt_get_device_data), GFP_KERNEL); |
| 485 | if (!transfer_buffer) |
| 486 | return -ENOMEM; |
| 487 | |
| 488 | result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
| 489 | QT_SET_GET_DEVICE, 0xc0, 0, 0, |
| 490 | transfer_buffer, |
| 491 | sizeof(struct qt_get_device_data), 300); |
| 492 | if (result > 0) |
| 493 | memcpy(device_data, transfer_buffer, |
| 494 | sizeof(struct qt_get_device_data)); |
| 495 | kfree(transfer_buffer); |
| 496 | |
| 497 | return result; |
| 498 | } |
| 499 | |
| 500 | /**************************************************************************** |
| 501 | * BoxSetPrebufferLevel |
| 502 | TELLS BOX WHEN TO ASSERT FLOW CONTROL |
| 503 | ****************************************************************************/ |
| 504 | static int BoxSetPrebufferLevel(struct usb_serial *serial) |
| 505 | { |
| 506 | int result; |
| 507 | __u16 buffer_length; |
| 508 | |
| 509 | buffer_length = PREFUFF_LEVEL_CONSERVATIVE; |
| 510 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| 511 | QT_GET_SET_PREBUF_TRIG_LVL, 0x40, |
| 512 | buffer_length, 0, NULL, 0, 300); |
| 513 | return result; |
| 514 | } |
| 515 | |
| 516 | /**************************************************************************** |
| 517 | * BoxSetATC |
| 518 | TELLS BOX WHEN TO ASSERT automatic transmitter control |
| 519 | ****************************************************************************/ |
| 520 | static int BoxSetATC(struct usb_serial *serial, __u16 n_Mode) |
| 521 | { |
| 522 | int result; |
| 523 | __u16 buffer_length; |
| 524 | |
| 525 | buffer_length = PREFUFF_LEVEL_CONSERVATIVE; |
| 526 | |
| 527 | result = |
| 528 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| 529 | QT_SET_ATF, 0x40, n_Mode, 0, NULL, 0, 300); |
| 530 | |
| 531 | return result; |
| 532 | } |
| 533 | |
| 534 | /** |
| 535 | * qt_set_device |
| 536 | * Issue a SET_DEVICE vendor-specific request on the default control pipe If |
| 537 | * successful returns the number of bytes written, otherwise it returns a |
| 538 | * negative error number of the problem. |
| 539 | */ |
| 540 | static int qt_set_device(struct usb_serial *serial, |
| 541 | struct qt_get_device_data *device_data) |
| 542 | { |
| 543 | int result; |
| 544 | __u16 length; |
| 545 | __u16 PortSettings; |
| 546 | |
| 547 | PortSettings = ((__u16) (device_data->portb)); |
| 548 | PortSettings = (PortSettings << 8); |
| 549 | PortSettings += ((__u16) (device_data->porta)); |
| 550 | |
| 551 | length = sizeof(struct qt_get_device_data); |
| 552 | dbg("%s - PortSettings = 0x%x\n", __func__, PortSettings); |
| 553 | |
| 554 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| 555 | QT_SET_GET_DEVICE, 0x40, PortSettings, |
| 556 | 0, NULL, 0, 300); |
| 557 | return result; |
| 558 | } |
| 559 | |
| 560 | static int qt_open_channel(struct usb_serial *serial, __u16 Uart_Number, |
| 561 | struct qt_open_channel_data *pDeviceData) |
| 562 | { |
| 563 | int result; |
| 564 | |
| 565 | result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
| 566 | QT_OPEN_CLOSE_CHANNEL, |
| 567 | USBD_TRANSFER_DIRECTION_IN, 1, Uart_Number, |
| 568 | pDeviceData, |
| 569 | sizeof(struct qt_open_channel_data), 300); |
| 570 | |
| 571 | return result; |
| 572 | |
| 573 | } |
| 574 | |
| 575 | static int qt_close_channel(struct usb_serial *serial, __u16 Uart_Number) |
| 576 | { |
| 577 | int result; |
| 578 | |
| 579 | result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
| 580 | QT_OPEN_CLOSE_CHANNEL, |
| 581 | USBD_TRANSFER_DIRECTION_OUT, 0, Uart_Number, |
| 582 | NULL, 0, 300); |
| 583 | |
| 584 | return result; |
| 585 | |
| 586 | } |
| 587 | |
| 588 | /**************************************************************************** |
| 589 | * BoxGetRegister |
| 590 | * issuse a GET_REGISTER vendor-spcific request on the default control pipe |
| 591 | * If successful, fills in the pValue with the register value asked for |
| 592 | ****************************************************************************/ |
| 593 | static int BoxGetRegister(struct usb_serial *serial, unsigned short Uart_Number, |
| 594 | unsigned short Register_Num, __u8 *pValue) |
| 595 | { |
| 596 | int result; |
| 597 | __u16 current_length; |
| 598 | |
| 599 | current_length = sizeof(struct qt_get_device_data); |
| 600 | |
| 601 | result = |
| 602 | usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
| 603 | QT_GET_SET_REGISTER, 0xC0, Register_Num, |
| 604 | Uart_Number, (void *)pValue, sizeof(*pValue), 300); |
| 605 | |
| 606 | return result; |
| 607 | } |
| 608 | |
| 609 | /**************************************************************************** |
| 610 | * BoxSetRegister |
| 611 | * issuse a GET_REGISTER vendor-spcific request on the default control pipe |
| 612 | * If successful, fills in the pValue with the register value asked for |
| 613 | ****************************************************************************/ |
| 614 | static int BoxSetRegister(struct usb_serial *serial, unsigned short Uart_Number, |
| 615 | unsigned short Register_Num, unsigned short Value) |
| 616 | { |
| 617 | int result; |
| 618 | unsigned short RegAndByte; |
| 619 | |
| 620 | RegAndByte = Value; |
| 621 | RegAndByte = RegAndByte << 8; |
| 622 | RegAndByte = RegAndByte + Register_Num; |
| 623 | |
| 624 | /* |
| 625 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| 626 | QT_GET_SET_REGISTER, 0xC0, Register_Num, |
| 627 | Uart_Number, NULL, 0, 300); |
| 628 | */ |
| 629 | |
| 630 | result = |
| 631 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| 632 | QT_GET_SET_REGISTER, 0x40, RegAndByte, Uart_Number, |
| 633 | NULL, 0, 300); |
| 634 | |
| 635 | return result; |
| 636 | } |
| 637 | |
| 638 | /* |
| 639 | * qt_setuart |
| 640 | * issuse a SET_UART vendor-spcific request on the default control pipe |
| 641 | * If successful sets baud rate divisor and LCR value |
| 642 | */ |
| 643 | static int qt_setuart(struct usb_serial *serial, unsigned short Uart_Number, |
| 644 | unsigned short default_divisor, unsigned char default_LCR) |
| 645 | { |
| 646 | int result; |
| 647 | unsigned short UartNumandLCR; |
| 648 | |
| 649 | UartNumandLCR = (default_LCR << 8) + Uart_Number; |
| 650 | |
| 651 | result = |
| 652 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| 653 | QT_GET_SET_UART, 0x40, default_divisor, |
| 654 | UartNumandLCR, NULL, 0, 300); |
| 655 | |
| 656 | return result; |
| 657 | } |
| 658 | |
| 659 | static int BoxSetHW_FlowCtrl(struct usb_serial *serial, unsigned int index, |
| 660 | int bSet) |
| 661 | { |
| 662 | __u8 mcr = 0; |
| 663 | __u8 msr = 0, MOUT_Value = 0; |
| 664 | unsigned int status; |
| 665 | |
| 666 | if (bSet == 1) { |
| 667 | /* flow control, box will clear RTS line to prevent remote */ |
| 668 | mcr = SERIAL_MCR_RTS; |
| 669 | } /* device from xmitting more chars */ |
| 670 | else { |
| 671 | /* no flow control to remote device */ |
| 672 | mcr = 0; |
| 673 | |
| 674 | } |
| 675 | MOUT_Value = mcr << 8; |
| 676 | |
| 677 | if (bSet == 1) { |
| 678 | /* flow control, box will inhibit xmit data if CTS line is |
| 679 | * asserted */ |
| 680 | msr = SERIAL_MSR_CTS; |
| 681 | } else { |
| 682 | /* Box will not inhimbe xmit data due to CTS line */ |
| 683 | msr = 0; |
| 684 | } |
| 685 | MOUT_Value |= msr; |
| 686 | |
| 687 | status = |
| 688 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| 689 | QT_HW_FLOW_CONTROL_MASK, 0x40, MOUT_Value, |
| 690 | index, NULL, 0, 300); |
| 691 | return status; |
| 692 | |
| 693 | } |
| 694 | |
| 695 | static int BoxSetSW_FlowCtrl(struct usb_serial *serial, __u16 index, |
| 696 | unsigned char stop_char, unsigned char start_char) |
| 697 | { |
| 698 | __u16 nSWflowout; |
| 699 | int result; |
| 700 | |
| 701 | nSWflowout = start_char << 8; |
| 702 | nSWflowout = (unsigned short)stop_char; |
| 703 | |
| 704 | result = |
| 705 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| 706 | QT_SW_FLOW_CONTROL_MASK, 0x40, nSWflowout, |
| 707 | index, NULL, 0, 300); |
| 708 | return result; |
| 709 | |
| 710 | } |
| 711 | |
| 712 | static int BoxDisable_SW_FlowCtrl(struct usb_serial *serial, __u16 index) |
| 713 | { |
| 714 | int result; |
| 715 | |
| 716 | result = |
| 717 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| 718 | QT_SW_FLOW_CONTROL_DISABLE, 0x40, 0, index, |
| 719 | NULL, 0, 300); |
| 720 | return result; |
| 721 | |
| 722 | } |
| 723 | |
| 724 | static int qt_startup(struct usb_serial *serial) |
| 725 | { |
| 726 | struct usb_serial_port *port; |
| 727 | struct quatech_port *qt_port; |
| 728 | struct qt_get_device_data DeviceData; |
| 729 | int i; |
| 730 | int status; |
| 731 | |
| 732 | dbg("enterting %s", __func__); |
| 733 | |
| 734 | /* Now setup per port private data */ |
| 735 | for (i = 0; i < serial->num_ports; i++) { |
| 736 | port = serial->port[i]; |
| 737 | qt_port = kzalloc(sizeof(*qt_port), GFP_KERNEL); |
| 738 | if (!qt_port) { |
| 739 | dbg("%s: kmalloc for quatech_port (%d) failed!.", |
| 740 | __func__, i); |
Oliver Neukum | de8f8bd | 2009-07-13 10:46:57 +0200 | [diff] [blame] | 741 | for(--i; i >= 0; i--) { |
| 742 | port = serial->port[i]; |
| 743 | kfree(usb_get_serial_port_data(port)); |
| 744 | usb_set_serial_port_data(port, NULL); |
| 745 | } |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 746 | return -ENOMEM; |
| 747 | } |
| 748 | spin_lock_init(&qt_port->lock); |
| 749 | |
| 750 | usb_set_serial_port_data(port, qt_port); |
| 751 | |
| 752 | } |
| 753 | |
| 754 | status = qt_get_device(serial, &DeviceData); |
| 755 | if (status < 0) { |
| 756 | dbg(__FILE__ "box_get_device failed"); |
| 757 | goto startup_error; |
| 758 | } |
| 759 | |
| 760 | dbg(__FILE__ "DeviceData.portb = 0x%x", DeviceData.portb); |
| 761 | |
| 762 | DeviceData.portb &= ~FULLPWRBIT; |
| 763 | dbg(__FILE__ "Changing DeviceData.portb to 0x%x", DeviceData.portb); |
| 764 | |
| 765 | status = qt_set_device(serial, &DeviceData); |
| 766 | if (status < 0) { |
| 767 | dbg(__FILE__ "qt_set_device failed\n"); |
| 768 | goto startup_error; |
| 769 | } |
| 770 | |
| 771 | status = qt_get_device(serial, &DeviceData); |
| 772 | if (status < 0) { |
| 773 | dbg(__FILE__ "qt_get_device failed"); |
| 774 | goto startup_error; |
| 775 | } |
| 776 | |
| 777 | switch (serial->dev->descriptor.idProduct) { |
| 778 | case QUATECH_SSU100: |
| 779 | case QUATECH_DSU100: |
| 780 | case QUATECH_QSU100: |
| 781 | case QUATECH_ESU100A: |
| 782 | case QUATECH_ESU100B: |
| 783 | case QUATECH_HSU100A: |
| 784 | case QUATECH_HSU100B: |
| 785 | case QUATECH_HSU100C: |
| 786 | case QUATECH_HSU100D: |
| 787 | DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS); |
| 788 | DeviceData.porta |= CLKS_X4; |
| 789 | DeviceData.portb &= ~(LOOPMODE_BITS); |
| 790 | DeviceData.portb |= RS232_MODE; |
| 791 | break; |
| 792 | |
| 793 | case QUATECH_SSU200: |
| 794 | case QUATECH_DSU200: |
| 795 | case QUATECH_QSU200: |
| 796 | case QUATECH_ESU200A: |
| 797 | case QUATECH_ESU200B: |
| 798 | case QUATECH_HSU200A: |
| 799 | case QUATECH_HSU200B: |
| 800 | case QUATECH_HSU200C: |
| 801 | case QUATECH_HSU200D: |
| 802 | DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS); |
| 803 | DeviceData.porta |= CLKS_X4; |
| 804 | DeviceData.portb &= ~(LOOPMODE_BITS); |
| 805 | DeviceData.portb |= ALL_LOOPBACK; |
| 806 | break; |
| 807 | default: |
| 808 | DeviceData.porta &= ~(RR_BITS | DUPMODE_BITS); |
| 809 | DeviceData.porta |= CLKS_X4; |
| 810 | DeviceData.portb &= ~(LOOPMODE_BITS); |
| 811 | DeviceData.portb |= RS232_MODE; |
| 812 | break; |
| 813 | |
| 814 | } |
| 815 | |
| 816 | status = BoxSetPrebufferLevel(serial); /* sets to default value */ |
| 817 | if (status < 0) { |
| 818 | dbg(__FILE__ "BoxSetPrebufferLevel failed\n"); |
| 819 | goto startup_error; |
| 820 | } |
| 821 | |
| 822 | status = BoxSetATC(serial, ATC_DISABLED); |
| 823 | if (status < 0) { |
| 824 | dbg(__FILE__ "BoxSetATC failed\n"); |
| 825 | goto startup_error; |
| 826 | } |
| 827 | |
| 828 | dbg(__FILE__ "DeviceData.portb = 0x%x", DeviceData.portb); |
| 829 | |
| 830 | DeviceData.portb |= NEXT_BOARD_POWER_BIT; |
| 831 | dbg(__FILE__ "Changing DeviceData.portb to 0x%x", DeviceData.portb); |
| 832 | |
| 833 | status = qt_set_device(serial, &DeviceData); |
| 834 | if (status < 0) { |
| 835 | dbg(__FILE__ "qt_set_device failed\n"); |
| 836 | goto startup_error; |
| 837 | } |
| 838 | |
| 839 | dbg("Exit Success %s\n", __func__); |
| 840 | |
| 841 | return 0; |
| 842 | |
| 843 | startup_error: |
| 844 | for (i = 0; i < serial->num_ports; i++) { |
| 845 | port = serial->port[i]; |
| 846 | qt_port = qt_get_port_private(port); |
| 847 | kfree(qt_port); |
| 848 | usb_set_serial_port_data(port, NULL); |
| 849 | } |
| 850 | |
| 851 | dbg("Exit fail %s\n", __func__); |
| 852 | |
| 853 | return -EIO; |
| 854 | } |
| 855 | |
| 856 | static void qt_release(struct usb_serial *serial) |
| 857 | { |
| 858 | struct usb_serial_port *port; |
| 859 | struct quatech_port *qt_port; |
| 860 | int i; |
| 861 | |
| 862 | dbg("enterting %s", __func__); |
| 863 | |
| 864 | for (i = 0; i < serial->num_ports; i++) { |
| 865 | port = serial->port[i]; |
| 866 | if (!port) |
| 867 | continue; |
| 868 | |
| 869 | qt_port = usb_get_serial_port_data(port); |
| 870 | kfree(qt_port); |
| 871 | usb_set_serial_port_data(port, NULL); |
| 872 | } |
| 873 | |
| 874 | } |
| 875 | |
Bill Pemberton | 35e2bed | 2009-06-19 12:32:57 -0400 | [diff] [blame] | 876 | static int qt_open(struct tty_struct *tty, |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 877 | struct usb_serial_port *port, struct file *filp) |
| 878 | { |
| 879 | struct usb_serial *serial; |
| 880 | struct quatech_port *quatech_port; |
| 881 | struct quatech_port *port0; |
| 882 | struct qt_open_channel_data ChannelData; |
| 883 | |
| 884 | int result; |
| 885 | |
| 886 | if (port_paranoia_check(port, __func__)) |
| 887 | return -ENODEV; |
| 888 | |
| 889 | dbg("%s - port %d\n", __func__, port->number); |
| 890 | |
| 891 | serial = port->serial; |
| 892 | |
| 893 | if (serial_paranoia_check(serial, __func__)) |
| 894 | return -ENODEV; |
| 895 | |
| 896 | quatech_port = qt_get_port_private(port); |
| 897 | port0 = qt_get_port_private(serial->port[0]); |
| 898 | |
| 899 | if (quatech_port == NULL || port0 == NULL) |
| 900 | return -ENODEV; |
| 901 | |
| 902 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
| 903 | usb_clear_halt(serial->dev, port->read_urb->pipe); |
| 904 | port0->open_ports++; |
| 905 | |
| 906 | result = qt_get_device(serial, &port0->DeviceData); |
| 907 | |
| 908 | /* Port specific setups */ |
| 909 | result = qt_open_channel(serial, port->number, &ChannelData); |
| 910 | if (result < 0) { |
| 911 | dbg(__FILE__ "qt_open_channel failed\n"); |
| 912 | return result; |
| 913 | } |
| 914 | dbg(__FILE__ "qt_open_channel completed.\n"); |
| 915 | |
| 916 | /* FIXME: are these needed? Does it even do anything useful? */ |
| 917 | quatech_port->shadowLSR = ChannelData.line_status & |
| 918 | (SERIAL_LSR_OE | SERIAL_LSR_PE | SERIAL_LSR_FE | SERIAL_LSR_BI); |
| 919 | |
| 920 | quatech_port->shadowMSR = ChannelData.modem_status & |
| 921 | (SERIAL_MSR_CTS | SERIAL_MSR_DSR | SERIAL_MSR_RI | SERIAL_MSR_CD); |
| 922 | |
| 923 | /* Set Baud rate to default and turn off (default)flow control here */ |
| 924 | result = qt_setuart(serial, port->number, DEFAULT_DIVISOR, DEFAULT_LCR); |
| 925 | if (result < 0) { |
| 926 | dbg(__FILE__ "qt_setuart failed\n"); |
| 927 | return result; |
| 928 | } |
| 929 | dbg(__FILE__ "qt_setuart completed.\n"); |
| 930 | |
| 931 | /* |
| 932 | * Put this here to make it responsive to stty and defauls set by |
| 933 | * the tty layer |
| 934 | */ |
| 935 | /* FIXME: is this needed? */ |
| 936 | /* qt_set_termios(tty, port, NULL); */ |
| 937 | |
| 938 | /* Check to see if we've set up our endpoint info yet */ |
| 939 | if (port0->open_ports == 1) { |
| 940 | if (serial->port[0]->interrupt_in_buffer == NULL) { |
| 941 | /* set up interrupt urb */ |
| 942 | usb_fill_int_urb(serial->port[0]->interrupt_in_urb, |
| 943 | serial->dev, |
| 944 | usb_rcvintpipe(serial->dev, |
| 945 | serial->port[0]->interrupt_in_endpointAddress), |
| 946 | serial->port[0]->interrupt_in_buffer, |
| 947 | serial->port[0]-> |
| 948 | interrupt_in_urb->transfer_buffer_length, |
| 949 | qt_interrupt_callback, serial, |
| 950 | serial->port[0]-> |
| 951 | interrupt_in_urb->interval); |
| 952 | |
| 953 | result = |
| 954 | usb_submit_urb(serial->port[0]->interrupt_in_urb, |
| 955 | GFP_KERNEL); |
| 956 | if (result) { |
| 957 | dev_err(&port->dev, |
| 958 | "%s - Error %d submitting " |
| 959 | "interrupt urb\n", __func__, result); |
| 960 | } |
| 961 | |
| 962 | } |
| 963 | |
| 964 | } |
| 965 | |
| 966 | dbg("port number is %d \n", port->number); |
| 967 | dbg("serial number is %d \n", port->serial->minor); |
| 968 | dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress); |
| 969 | dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress); |
| 970 | dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress); |
| 971 | dbg("port's number in the device is %d\n", quatech_port->port_num); |
| 972 | quatech_port->read_urb = port->read_urb; |
| 973 | |
| 974 | /* set up our bulk in urb */ |
| 975 | |
| 976 | usb_fill_bulk_urb(quatech_port->read_urb, |
| 977 | serial->dev, |
| 978 | usb_rcvbulkpipe(serial->dev, |
| 979 | port->bulk_in_endpointAddress), |
| 980 | port->bulk_in_buffer, |
| 981 | quatech_port->read_urb->transfer_buffer_length, |
| 982 | qt_read_bulk_callback, quatech_port); |
| 983 | |
| 984 | dbg("qt_open: bulkin endpoint is %d\n", port->bulk_in_endpointAddress); |
| 985 | quatech_port->read_urb_busy = true; |
| 986 | result = usb_submit_urb(quatech_port->read_urb, GFP_KERNEL); |
| 987 | if (result) { |
| 988 | dev_err(&port->dev, |
| 989 | "%s - Error %d submitting control urb\n", |
| 990 | __func__, result); |
| 991 | quatech_port->read_urb_busy = false; |
| 992 | } |
| 993 | |
| 994 | /* initialize our wait queues */ |
| 995 | init_waitqueue_head(&quatech_port->wait); |
| 996 | init_waitqueue_head(&quatech_port->msr_wait); |
| 997 | |
| 998 | /* initialize our icount structure */ |
| 999 | memset(&(quatech_port->icount), 0x00, sizeof(quatech_port->icount)); |
| 1000 | |
| 1001 | return 0; |
| 1002 | |
| 1003 | } |
| 1004 | |
| 1005 | static int qt_chars_in_buffer(struct tty_struct *tty) |
| 1006 | { |
| 1007 | struct usb_serial_port *port = tty->driver_data; |
| 1008 | struct usb_serial *serial; |
| 1009 | int chars = 0; |
| 1010 | |
| 1011 | serial = get_usb_serial(port, __func__); |
| 1012 | |
| 1013 | dbg("%s - port %d\n", __func__, port->number); |
| 1014 | |
| 1015 | if (serial->num_bulk_out) { |
| 1016 | if (port->write_urb->status == -EINPROGRESS) |
| 1017 | chars = port->write_urb->transfer_buffer_length; |
| 1018 | } |
| 1019 | |
| 1020 | dbg("%s - returns %d\n", __func__, chars); |
| 1021 | |
| 1022 | return chars; |
| 1023 | } |
| 1024 | |
| 1025 | static void qt_block_until_empty(struct tty_struct *tty, |
| 1026 | struct quatech_port *qt_port) |
| 1027 | { |
| 1028 | int timeout = HZ / 10; |
| 1029 | int wait = 30; |
| 1030 | int count; |
| 1031 | |
| 1032 | while (1) { |
| 1033 | |
| 1034 | count = qt_chars_in_buffer(tty); |
| 1035 | |
| 1036 | if (count <= 0) |
| 1037 | return; |
| 1038 | |
| 1039 | interruptible_sleep_on_timeout(&qt_port->wait, timeout); |
| 1040 | |
| 1041 | wait--; |
| 1042 | if (wait == 0) { |
| 1043 | dbg("%s - TIMEOUT", __func__); |
| 1044 | return; |
| 1045 | } else { |
| 1046 | wait = 30; |
| 1047 | } |
| 1048 | } |
| 1049 | } |
| 1050 | |
Bill Pemberton | f3a7568 | 2009-07-14 15:33:52 -0400 | [diff] [blame] | 1051 | static void qt_close(struct usb_serial_port *port) |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 1052 | { |
| 1053 | struct usb_serial *serial = port->serial; |
| 1054 | struct quatech_port *qt_port; |
| 1055 | struct quatech_port *port0; |
Bill Pemberton | d9dea3c | 2009-06-19 12:32:56 -0400 | [diff] [blame] | 1056 | struct tty_struct *tty; |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 1057 | int status; |
| 1058 | unsigned int index; |
| 1059 | status = 0; |
| 1060 | |
| 1061 | dbg("%s - port %d\n", __func__, port->number); |
Bill Pemberton | d9dea3c | 2009-06-19 12:32:56 -0400 | [diff] [blame] | 1062 | |
| 1063 | tty = tty_port_tty_get(&port->port); |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 1064 | index = tty->index - serial->minor; |
| 1065 | |
| 1066 | qt_port = qt_get_port_private(port); |
| 1067 | port0 = qt_get_port_private(serial->port[0]); |
| 1068 | |
| 1069 | /* shutdown any bulk reads that might be going on */ |
| 1070 | if (serial->num_bulk_out) |
| 1071 | usb_unlink_urb(port->write_urb); |
| 1072 | if (serial->num_bulk_in) |
| 1073 | usb_unlink_urb(port->read_urb); |
| 1074 | |
| 1075 | /* wait up to for transmitter to empty */ |
| 1076 | if (serial->dev) |
| 1077 | qt_block_until_empty(tty, qt_port); |
Bill Pemberton | f3a7568 | 2009-07-14 15:33:52 -0400 | [diff] [blame] | 1078 | tty_kref_put(tty); |
Bill Pemberton | d75662e | 2009-05-31 15:49:43 -0400 | [diff] [blame] | 1079 | |
| 1080 | /* Close uart channel */ |
| 1081 | status = qt_close_channel(serial, index); |
| 1082 | if (status < 0) |
| 1083 | dbg("%s - port %d qt_close_channel failed.\n", |
| 1084 | __func__, port->number); |
| 1085 | |
| 1086 | port0->open_ports--; |
| 1087 | |
| 1088 | dbg("qt_num_open_ports in close%d:in port%d\n", |
| 1089 | port0->open_ports, port->number); |
| 1090 | |
| 1091 | if (port0->open_ports == 0) { |
| 1092 | if (serial->port[0]->interrupt_in_urb) { |
| 1093 | dbg("%s", "Shutdown interrupt_in_urb\n"); |
| 1094 | usb_kill_urb(serial->port[0]->interrupt_in_urb); |
| 1095 | } |
| 1096 | |
| 1097 | } |
| 1098 | |
| 1099 | if (qt_port->write_urb) { |
| 1100 | /* if this urb had a transfer buffer already (old tx) free it */ |
| 1101 | if (qt_port->write_urb->transfer_buffer != NULL) |
| 1102 | kfree(qt_port->write_urb->transfer_buffer); |
| 1103 | usb_free_urb(qt_port->write_urb); |
| 1104 | } |
| 1105 | |
| 1106 | } |
| 1107 | |
| 1108 | static int qt_write(struct tty_struct *tty, struct usb_serial_port *port, |
| 1109 | const unsigned char *buf, int count) |
| 1110 | { |
| 1111 | int result; |
| 1112 | struct usb_serial *serial = get_usb_serial(port, __func__); |
| 1113 | |
| 1114 | if (serial == NULL) |
| 1115 | return -ENODEV; |
| 1116 | |
| 1117 | dbg("%s - port %d\n", __func__, port->number); |
| 1118 | |
| 1119 | if (count == 0) { |
| 1120 | dbg("%s - write request of 0 bytes\n", __func__); |
| 1121 | return 0; |
| 1122 | } |
| 1123 | |
| 1124 | /* only do something if we have a bulk out endpoint */ |
| 1125 | if (serial->num_bulk_out) { |
| 1126 | if (port->write_urb->status == -EINPROGRESS) { |
| 1127 | dbg("%s - already writing\n", __func__); |
| 1128 | return 0; |
| 1129 | } |
| 1130 | |
| 1131 | count = |
| 1132 | (count > port->bulk_out_size) ? port->bulk_out_size : count; |
| 1133 | memcpy(port->write_urb->transfer_buffer, buf, count); |
| 1134 | |
| 1135 | /* set up our urb */ |
| 1136 | |
| 1137 | usb_fill_bulk_urb(port->write_urb, serial->dev, |
| 1138 | usb_sndbulkpipe(serial->dev, |
| 1139 | port-> |
| 1140 | bulk_out_endpointAddress), |
| 1141 | port->write_urb->transfer_buffer, count, |
| 1142 | qt_write_bulk_callback, port); |
| 1143 | |
| 1144 | /* send the data out the bulk port */ |
| 1145 | result = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
| 1146 | if (result) |
| 1147 | dbg("%s - failed submitting write urb, error %d\n", |
| 1148 | __func__, result); |
| 1149 | else |
| 1150 | result = count; |
| 1151 | |
| 1152 | return result; |
| 1153 | } |
| 1154 | |
| 1155 | /* no bulk out, so return 0 bytes written */ |
| 1156 | return 0; |
| 1157 | } |
| 1158 | |
| 1159 | static int qt_write_room(struct tty_struct *tty) |
| 1160 | { |
| 1161 | struct usb_serial_port *port = tty->driver_data; |
| 1162 | struct usb_serial *serial; |
| 1163 | struct quatech_port *qt_port; |
| 1164 | unsigned long flags; |
| 1165 | |
| 1166 | int retval = -EINVAL; |
| 1167 | |
| 1168 | if (port_paranoia_check(port, __func__)) { |
| 1169 | dbg("%s", "Invalid port\n"); |
| 1170 | return -1; |
| 1171 | } |
| 1172 | |
| 1173 | serial = get_usb_serial(port, __func__); |
| 1174 | |
| 1175 | if (!serial) |
| 1176 | return -ENODEV; |
| 1177 | |
| 1178 | qt_port = qt_get_port_private(port); |
| 1179 | |
| 1180 | spin_lock_irqsave(&qt_port->lock, flags); |
| 1181 | |
| 1182 | dbg("%s - port %d\n", __func__, port->number); |
| 1183 | |
| 1184 | if (serial->num_bulk_out) { |
| 1185 | if (port->write_urb->status != -EINPROGRESS) |
| 1186 | retval = port->bulk_out_size; |
| 1187 | } |
| 1188 | |
| 1189 | spin_unlock_irqrestore(&qt_port->lock, flags); |
| 1190 | return retval; |
| 1191 | |
| 1192 | } |
| 1193 | |
| 1194 | static int qt_ioctl(struct tty_struct *tty, struct file *file, |
| 1195 | unsigned int cmd, unsigned long arg) |
| 1196 | { |
| 1197 | struct usb_serial_port *port = tty->driver_data; |
| 1198 | struct quatech_port *qt_port = qt_get_port_private(port); |
| 1199 | struct usb_serial *serial = get_usb_serial(port, __func__); |
| 1200 | unsigned int index; |
| 1201 | |
| 1202 | dbg("%s cmd 0x%04x", __func__, cmd); |
| 1203 | |
| 1204 | index = tty->index - serial->minor; |
| 1205 | |
| 1206 | if (cmd == TIOCMIWAIT) { |
| 1207 | while (qt_port != NULL) { |
| 1208 | interruptible_sleep_on(&qt_port->msr_wait); |
| 1209 | if (signal_pending(current)) |
| 1210 | return -ERESTARTSYS; |
| 1211 | else { |
| 1212 | char diff = qt_port->diff_status; |
| 1213 | |
| 1214 | if (diff == 0) |
| 1215 | return -EIO; /* no change => error */ |
| 1216 | |
| 1217 | /* Consume all events */ |
| 1218 | qt_port->diff_status = 0; |
| 1219 | |
| 1220 | if (((arg & TIOCM_RNG) |
| 1221 | && (diff & SERIAL_MSR_RI)) |
| 1222 | || ((arg & TIOCM_DSR) |
| 1223 | && (diff & SERIAL_MSR_DSR)) |
| 1224 | || ((arg & TIOCM_CD) |
| 1225 | && (diff & SERIAL_MSR_CD)) |
| 1226 | || ((arg & TIOCM_CTS) |
| 1227 | && (diff & SERIAL_MSR_CTS))) { |
| 1228 | return 0; |
| 1229 | } |
| 1230 | } |
| 1231 | } |
| 1232 | return 0; |
| 1233 | } |
| 1234 | |
| 1235 | dbg("%s -No ioctl for that one. port = %d\n", __func__, port->number); |
| 1236 | return -ENOIOCTLCMD; |
| 1237 | } |
| 1238 | |
| 1239 | static void qt_set_termios(struct tty_struct *tty, |
| 1240 | struct usb_serial_port *port, |
| 1241 | struct ktermios *old_termios) |
| 1242 | { |
| 1243 | struct ktermios *termios = tty->termios; |
| 1244 | unsigned char new_LCR = 0; |
| 1245 | unsigned int cflag = termios->c_cflag; |
| 1246 | unsigned int index; |
| 1247 | int baud, divisor, remainder; |
| 1248 | int status; |
| 1249 | |
| 1250 | dbg("%s", __func__); |
| 1251 | |
| 1252 | index = tty->index - port->serial->minor; |
| 1253 | |
| 1254 | switch (cflag) { |
| 1255 | case CS5: |
| 1256 | new_LCR |= SERIAL_5_DATA; |
| 1257 | break; |
| 1258 | case CS6: |
| 1259 | new_LCR |= SERIAL_6_DATA; |
| 1260 | break; |
| 1261 | case CS7: |
| 1262 | new_LCR |= SERIAL_7_DATA; |
| 1263 | break; |
| 1264 | default: |
| 1265 | case CS8: |
| 1266 | new_LCR |= SERIAL_8_DATA; |
| 1267 | break; |
| 1268 | } |
| 1269 | |
| 1270 | /* Parity stuff */ |
| 1271 | if (cflag & PARENB) { |
| 1272 | if (cflag & PARODD) |
| 1273 | new_LCR |= SERIAL_ODD_PARITY; |
| 1274 | else |
| 1275 | new_LCR |= SERIAL_EVEN_PARITY; |
| 1276 | } |
| 1277 | if (cflag & CSTOPB) |
| 1278 | new_LCR |= SERIAL_TWO_STOPB; |
| 1279 | else |
| 1280 | new_LCR |= SERIAL_TWO_STOPB; |
| 1281 | |
| 1282 | dbg("%s - 4\n", __func__); |
| 1283 | |
| 1284 | /* Thats the LCR stuff, go ahead and set it */ |
| 1285 | baud = tty_get_baud_rate(tty); |
| 1286 | if (!baud) |
| 1287 | /* pick a default, any default... */ |
| 1288 | baud = 9600; |
| 1289 | |
| 1290 | dbg("%s - got baud = %d\n", __func__, baud); |
| 1291 | |
| 1292 | divisor = MAX_BAUD_RATE / baud; |
| 1293 | remainder = MAX_BAUD_RATE % baud; |
| 1294 | /* Round to nearest divisor */ |
| 1295 | if (((remainder * 2) >= baud) && (baud != 110)) |
| 1296 | divisor++; |
| 1297 | |
| 1298 | /* |
| 1299 | * Set Baud rate to default and turn off (default)flow control here |
| 1300 | */ |
| 1301 | status = |
| 1302 | qt_setuart(port->serial, index, (unsigned short)divisor, new_LCR); |
| 1303 | if (status < 0) { |
| 1304 | dbg(__FILE__ "qt_setuart failed\n"); |
| 1305 | return; |
| 1306 | } |
| 1307 | |
| 1308 | /* Now determine flow control */ |
| 1309 | if (cflag & CRTSCTS) { |
| 1310 | dbg("%s - Enabling HW flow control port %d\n", __func__, |
| 1311 | port->number); |
| 1312 | |
| 1313 | /* Enable RTS/CTS flow control */ |
| 1314 | status = BoxSetHW_FlowCtrl(port->serial, index, 1); |
| 1315 | |
| 1316 | if (status < 0) { |
| 1317 | dbg(__FILE__ "BoxSetHW_FlowCtrl failed\n"); |
| 1318 | return; |
| 1319 | } |
| 1320 | } else { |
| 1321 | /* Disable RTS/CTS flow control */ |
| 1322 | dbg("%s - disabling HW flow control port %d\n", __func__, |
| 1323 | port->number); |
| 1324 | |
| 1325 | status = BoxSetHW_FlowCtrl(port->serial, index, 0); |
| 1326 | if (status < 0) { |
| 1327 | dbg(__FILE__ "BoxSetHW_FlowCtrl failed\n"); |
| 1328 | return; |
| 1329 | } |
| 1330 | |
| 1331 | } |
| 1332 | |
| 1333 | /* if we are implementing XON/XOFF, set the start and stop character in |
| 1334 | * the device */ |
| 1335 | if (I_IXOFF(tty) || I_IXON(tty)) { |
| 1336 | unsigned char stop_char = STOP_CHAR(tty); |
| 1337 | unsigned char start_char = START_CHAR(tty); |
| 1338 | status = |
| 1339 | BoxSetSW_FlowCtrl(port->serial, index, stop_char, |
| 1340 | start_char); |
| 1341 | if (status < 0) |
| 1342 | dbg(__FILE__ "BoxSetSW_FlowCtrl (enabled) failed\n"); |
| 1343 | |
| 1344 | } else { |
| 1345 | /* disable SW flow control */ |
| 1346 | status = BoxDisable_SW_FlowCtrl(port->serial, index); |
| 1347 | if (status < 0) |
| 1348 | dbg(__FILE__ "BoxSetSW_FlowCtrl (diabling) failed\n"); |
| 1349 | |
| 1350 | } |
| 1351 | tty->termios->c_cflag &= ~CMSPAR; |
| 1352 | /* FIXME: Error cases should be returning the actual bits changed only */ |
| 1353 | } |
| 1354 | |
| 1355 | static void qt_break(struct tty_struct *tty, int break_state) |
| 1356 | { |
| 1357 | struct usb_serial_port *port = tty->driver_data; |
| 1358 | struct usb_serial *serial = get_usb_serial(port, __func__); |
| 1359 | struct quatech_port *qt_port; |
| 1360 | u16 index, onoff; |
| 1361 | unsigned int result; |
| 1362 | unsigned long flags; |
| 1363 | |
| 1364 | index = tty->index - serial->minor; |
| 1365 | |
| 1366 | qt_port = qt_get_port_private(port); |
| 1367 | |
| 1368 | if (break_state == -1) |
| 1369 | onoff = 1; |
| 1370 | else |
| 1371 | onoff = 0; |
| 1372 | |
| 1373 | spin_lock_irqsave(&qt_port->lock, flags); |
| 1374 | |
| 1375 | dbg("%s - port %d\n", __func__, port->number); |
| 1376 | |
| 1377 | result = |
| 1378 | usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| 1379 | QT_BREAK_CONTROL, 0x40, onoff, index, NULL, 0, 300); |
| 1380 | |
| 1381 | spin_unlock_irqrestore(&qt_port->lock, flags); |
| 1382 | } |
| 1383 | |
| 1384 | static inline int qt_real_tiocmget(struct tty_struct *tty, |
| 1385 | struct usb_serial_port *port, |
| 1386 | struct file *file, struct usb_serial *serial) |
| 1387 | { |
| 1388 | |
| 1389 | u8 mcr; |
| 1390 | u8 msr; |
| 1391 | unsigned int result = 0; |
| 1392 | int status; |
| 1393 | unsigned int index; |
| 1394 | |
| 1395 | dbg("%s - port %d, tty =0x%p\n", __func__, port->number, tty); |
| 1396 | |
| 1397 | index = tty->index - serial->minor; |
| 1398 | status = |
| 1399 | BoxGetRegister(port->serial, index, MODEM_CONTROL_REGISTER, &mcr); |
| 1400 | if (status >= 0) { |
| 1401 | status = |
| 1402 | BoxGetRegister(port->serial, index, |
| 1403 | MODEM_STATUS_REGISTER, &msr); |
| 1404 | |
| 1405 | } |
| 1406 | |
| 1407 | if (status >= 0) { |
| 1408 | result = ((mcr & SERIAL_MCR_DTR) ? TIOCM_DTR : 0) |
| 1409 | /* DTR IS SET */ |
| 1410 | | ((mcr & SERIAL_MCR_RTS) ? TIOCM_RTS : 0) |
| 1411 | /* RTS IS SET */ |
| 1412 | | ((msr & SERIAL_MSR_CTS) ? TIOCM_CTS : 0) |
| 1413 | /* CTS is set */ |
| 1414 | | ((msr & SERIAL_MSR_CD) ? TIOCM_CAR : 0) |
| 1415 | /* Carrier detect is set */ |
| 1416 | | ((msr & SERIAL_MSR_RI) ? TIOCM_RI : 0) |
| 1417 | /* Ring indicator set */ |
| 1418 | | ((msr & SERIAL_MSR_DSR) ? TIOCM_DSR : 0); |
| 1419 | /* DSR is set */ |
| 1420 | return result; |
| 1421 | |
| 1422 | } else |
| 1423 | return -ESPIPE; |
| 1424 | } |
| 1425 | |
| 1426 | static inline int qt_real_tiocmset(struct tty_struct *tty, |
| 1427 | struct usb_serial_port *port, |
| 1428 | struct file *file, |
| 1429 | struct usb_serial *serial, |
| 1430 | unsigned int value) |
| 1431 | { |
| 1432 | |
| 1433 | u8 mcr; |
| 1434 | int status; |
| 1435 | unsigned int index; |
| 1436 | |
| 1437 | dbg("%s - port %d\n", __func__, port->number); |
| 1438 | |
| 1439 | index = tty->index - serial->minor; |
| 1440 | status = |
| 1441 | BoxGetRegister(port->serial, index, MODEM_CONTROL_REGISTER, &mcr); |
| 1442 | if (status < 0) |
| 1443 | return -ESPIPE; |
| 1444 | |
| 1445 | /* |
| 1446 | * Turn off the RTS and DTR and loopbcck and then only turn on what was |
| 1447 | * asked for |
| 1448 | */ |
| 1449 | mcr &= ~(SERIAL_MCR_RTS | SERIAL_MCR_DTR | SERIAL_MCR_LOOP); |
| 1450 | if (value & TIOCM_RTS) |
| 1451 | mcr |= SERIAL_MCR_RTS; |
| 1452 | if (value & TIOCM_DTR) |
| 1453 | mcr |= SERIAL_MCR_DTR; |
| 1454 | if (value & TIOCM_LOOP) |
| 1455 | mcr |= SERIAL_MCR_LOOP; |
| 1456 | |
| 1457 | status = |
| 1458 | BoxSetRegister(port->serial, index, MODEM_CONTROL_REGISTER, mcr); |
| 1459 | if (status < 0) |
| 1460 | return -ESPIPE; |
| 1461 | else |
| 1462 | return 0; |
| 1463 | } |
| 1464 | |
| 1465 | static int qt_tiocmget(struct tty_struct *tty, struct file *file) |
| 1466 | { |
| 1467 | struct usb_serial_port *port = tty->driver_data; |
| 1468 | struct usb_serial *serial = get_usb_serial(port, __func__); |
| 1469 | struct quatech_port *qt_port = qt_get_port_private(port); |
| 1470 | int retval = -ENODEV; |
| 1471 | unsigned long flags; |
| 1472 | |
| 1473 | dbg("In %s \n", __func__); |
| 1474 | |
| 1475 | if (!serial) |
| 1476 | return -ENODEV; |
| 1477 | |
| 1478 | spin_lock_irqsave(&qt_port->lock, flags); |
| 1479 | |
| 1480 | dbg("%s - port %d\n", __func__, port->number); |
| 1481 | dbg("%s - port->RxHolding = %d\n", __func__, qt_port->RxHolding); |
| 1482 | |
| 1483 | retval = qt_real_tiocmget(tty, port, file, serial); |
| 1484 | |
| 1485 | spin_unlock_irqrestore(&qt_port->lock, flags); |
| 1486 | return retval; |
| 1487 | } |
| 1488 | |
| 1489 | static int qt_tiocmset(struct tty_struct *tty, struct file *file, |
| 1490 | unsigned int set, unsigned int clear) |
| 1491 | { |
| 1492 | |
| 1493 | struct usb_serial_port *port = tty->driver_data; |
| 1494 | struct usb_serial *serial = get_usb_serial(port, __func__); |
| 1495 | struct quatech_port *qt_port = qt_get_port_private(port); |
| 1496 | unsigned long flags; |
| 1497 | int retval = -ENODEV; |
| 1498 | |
| 1499 | dbg("In %s \n", __func__); |
| 1500 | |
| 1501 | if (!serial) |
| 1502 | return -ENODEV; |
| 1503 | |
| 1504 | spin_lock_irqsave(&qt_port->lock, flags); |
| 1505 | |
| 1506 | dbg("%s - port %d \n", __func__, port->number); |
| 1507 | dbg("%s - qt_port->RxHolding = %d\n", __func__, qt_port->RxHolding); |
| 1508 | |
| 1509 | retval = qt_real_tiocmset(tty, port, file, serial, set); |
| 1510 | |
| 1511 | spin_unlock_irqrestore(&qt_port->lock, flags); |
| 1512 | return retval; |
| 1513 | } |
| 1514 | |
| 1515 | static void qt_throttle(struct tty_struct *tty) |
| 1516 | { |
| 1517 | struct usb_serial_port *port = tty->driver_data; |
| 1518 | struct usb_serial *serial = get_usb_serial(port, __func__); |
| 1519 | struct quatech_port *qt_port; |
| 1520 | unsigned long flags; |
| 1521 | |
| 1522 | dbg("%s - port %d\n", __func__, port->number); |
| 1523 | |
| 1524 | if (!serial) |
| 1525 | return; |
| 1526 | |
| 1527 | qt_port = qt_get_port_private(port); |
| 1528 | |
| 1529 | spin_lock_irqsave(&qt_port->lock, flags); |
| 1530 | |
| 1531 | /* pass on to the driver specific version of this function */ |
| 1532 | qt_port->RxHolding = 1; |
| 1533 | dbg("%s - port->RxHolding = 1\n", __func__); |
| 1534 | |
| 1535 | spin_unlock_irqrestore(&qt_port->lock, flags); |
| 1536 | return; |
| 1537 | } |
| 1538 | |
| 1539 | static void qt_unthrottle(struct tty_struct *tty) |
| 1540 | { |
| 1541 | struct usb_serial_port *port = tty->driver_data; |
| 1542 | struct usb_serial *serial = get_usb_serial(port, __func__); |
| 1543 | struct quatech_port *qt_port; |
| 1544 | unsigned long flags; |
| 1545 | unsigned int result; |
| 1546 | |
| 1547 | if (!serial) |
| 1548 | return; |
| 1549 | |
| 1550 | qt_port = qt_get_port_private(port); |
| 1551 | |
| 1552 | spin_lock_irqsave(&qt_port->lock, flags); |
| 1553 | |
| 1554 | dbg("%s - port %d\n", __func__, port->number); |
| 1555 | |
| 1556 | if (qt_port->RxHolding == 1) { |
| 1557 | dbg("%s -qt_port->RxHolding == 1\n", __func__); |
| 1558 | |
| 1559 | qt_port->RxHolding = 0; |
| 1560 | dbg("%s - qt_port->RxHolding = 0\n", __func__); |
| 1561 | |
| 1562 | /* if we have a bulk endpoint, start it up */ |
| 1563 | if ((serial->num_bulk_in) && (qt_port->ReadBulkStopped == 1)) { |
| 1564 | /* Start reading from the device */ |
| 1565 | usb_fill_bulk_urb(port->read_urb, serial->dev, |
| 1566 | usb_rcvbulkpipe(serial->dev, |
| 1567 | port->bulk_in_endpointAddress), |
| 1568 | port->read_urb->transfer_buffer, |
| 1569 | port->read_urb-> |
| 1570 | transfer_buffer_length, |
| 1571 | qt_read_bulk_callback, port); |
| 1572 | result = usb_submit_urb(port->read_urb, GFP_ATOMIC); |
| 1573 | if (result) |
| 1574 | err("%s - failed restarting read urb, error %d", |
| 1575 | __func__, result); |
| 1576 | } |
| 1577 | } |
| 1578 | spin_unlock_irqrestore(&qt_port->lock, flags); |
| 1579 | return; |
| 1580 | |
| 1581 | } |
| 1582 | |
| 1583 | static int qt_calc_num_ports(struct usb_serial *serial) |
| 1584 | { |
| 1585 | int num_ports; |
| 1586 | |
| 1587 | dbg("numberofendpoints: %d \n", |
| 1588 | (int)serial->interface->cur_altsetting->desc.bNumEndpoints); |
| 1589 | dbg("numberofendpoints: %d \n", |
| 1590 | (int)serial->interface->altsetting->desc.bNumEndpoints); |
| 1591 | |
| 1592 | num_ports = |
| 1593 | (serial->interface->cur_altsetting->desc.bNumEndpoints - 1) / 2; |
| 1594 | |
| 1595 | return num_ports; |
| 1596 | } |
| 1597 | |
| 1598 | static struct usb_serial_driver quatech_device = { |
| 1599 | .driver = { |
| 1600 | .owner = THIS_MODULE, |
| 1601 | .name = "serqt", |
| 1602 | }, |
| 1603 | .description = DRIVER_DESC, |
| 1604 | .usb_driver = &serqt_usb_driver, |
| 1605 | .id_table = serqt_id_table, |
| 1606 | .num_ports = 8, |
| 1607 | .open = qt_open, |
| 1608 | .close = qt_close, |
| 1609 | .write = qt_write, |
| 1610 | .write_room = qt_write_room, |
| 1611 | .chars_in_buffer = qt_chars_in_buffer, |
| 1612 | .throttle = qt_throttle, |
| 1613 | .unthrottle = qt_unthrottle, |
| 1614 | .calc_num_ports = qt_calc_num_ports, |
| 1615 | .ioctl = qt_ioctl, |
| 1616 | .set_termios = qt_set_termios, |
| 1617 | .break_ctl = qt_break, |
| 1618 | .tiocmget = qt_tiocmget, |
| 1619 | .tiocmset = qt_tiocmset, |
| 1620 | .attach = qt_startup, |
| 1621 | .release = qt_release, |
| 1622 | }; |
| 1623 | |
| 1624 | static int __init serqt_usb_init(void) |
| 1625 | { |
| 1626 | int retval; |
| 1627 | |
| 1628 | dbg("%s\n", __func__); |
| 1629 | |
| 1630 | /* register with usb-serial */ |
| 1631 | retval = usb_serial_register(&quatech_device); |
| 1632 | |
| 1633 | if (retval) |
| 1634 | goto failed_usb_serial_register; |
| 1635 | |
| 1636 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
| 1637 | DRIVER_DESC "\n"); |
| 1638 | |
| 1639 | /* register with usb */ |
| 1640 | |
| 1641 | retval = usb_register(&serqt_usb_driver); |
| 1642 | if (retval == 0) |
| 1643 | return 0; |
| 1644 | |
| 1645 | /* if we're here, usb_register() failed */ |
| 1646 | usb_serial_deregister(&quatech_device); |
| 1647 | failed_usb_serial_register: |
| 1648 | return retval; |
| 1649 | } |
| 1650 | |
| 1651 | static void __exit serqt_usb_exit(void) |
| 1652 | { |
| 1653 | usb_deregister(&serqt_usb_driver); |
| 1654 | usb_serial_deregister(&quatech_device); |
| 1655 | } |
| 1656 | |
| 1657 | module_init(serqt_usb_init); |
| 1658 | module_exit(serqt_usb_exit); |
| 1659 | |
| 1660 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 1661 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 1662 | MODULE_LICENSE("GPL"); |
| 1663 | |
| 1664 | module_param(debug, bool, S_IRUGO | S_IWUSR); |
| 1665 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |