1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License as published by 4 * the Free Software Foundation; either version 2 of the License, or 5 * (at your option) any later version. 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 * 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 15 * 16 * Clean ups from Moschip version and a few ioctl implementations by: 17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com> 18 * 19 * Originally based on drivers/usb/serial/io_edgeport.c which is: 20 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 22 * 23 */ 24 25 #include <linux/kernel.h> 26 #include <linux/errno.h> 27 #include <linux/init.h> 28 #include <linux/slab.h> 29 #include <linux/tty.h> 30 #include <linux/tty_driver.h> 31 #include <linux/tty_flip.h> 32 #include <linux/module.h> 33 #include <linux/serial.h> 34 #include <linux/usb.h> 35 #include <linux/usb/serial.h> 36 #include <linux/uaccess.h> 37 38 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" 39 40 /* 41 * 16C50 UART register defines 42 */ 43 44 #define LCR_BITS_5 0x00 /* 5 bits/char */ 45 #define LCR_BITS_6 0x01 /* 6 bits/char */ 46 #define LCR_BITS_7 0x02 /* 7 bits/char */ 47 #define LCR_BITS_8 0x03 /* 8 bits/char */ 48 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ 49 50 #define LCR_STOP_1 0x00 /* 1 stop bit */ 51 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ 52 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ 53 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ 54 55 #define LCR_PAR_NONE 0x00 /* No parity */ 56 #define LCR_PAR_ODD 0x08 /* Odd parity */ 57 #define LCR_PAR_EVEN 0x18 /* Even parity */ 58 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ 59 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ 60 #define LCR_PAR_MASK 0x38 /* Mask for parity field */ 61 62 #define LCR_SET_BREAK 0x40 /* Set Break condition */ 63 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ 64 65 #define MCR_DTR 0x01 /* Assert DTR */ 66 #define MCR_RTS 0x02 /* Assert RTS */ 67 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ 68 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ 69 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ 70 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ 71 72 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ 73 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ 74 #define MOS7840_MSR_RI 0x40 /* Current state of RI */ 75 #define MOS7840_MSR_CD 0x80 /* Current state of CD */ 76 77 /* 78 * Defines used for sending commands to port 79 */ 80 81 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */ 82 83 #define MOS_PORT1 0x0200 84 #define MOS_PORT2 0x0300 85 #define MOS_VENREG 0x0000 86 #define MOS_MAX_PORT 0x02 87 #define MOS_WRITE 0x0E 88 #define MOS_READ 0x0D 89 90 /* Requests */ 91 #define MCS_RD_RTYPE 0xC0 92 #define MCS_WR_RTYPE 0x40 93 #define MCS_RDREQ 0x0D 94 #define MCS_WRREQ 0x0E 95 #define MCS_CTRL_TIMEOUT 500 96 #define VENDOR_READ_LENGTH (0x01) 97 98 #define MAX_NAME_LEN 64 99 100 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ 101 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ 102 103 /* For higher baud Rates use TIOCEXBAUD */ 104 #define TIOCEXBAUD 0x5462 105 106 /* vendor id and device id defines */ 107 108 /* The native mos7840/7820 component */ 109 #define USB_VENDOR_ID_MOSCHIP 0x9710 110 #define MOSCHIP_DEVICE_ID_7840 0x7840 111 #define MOSCHIP_DEVICE_ID_7820 0x7820 112 #define MOSCHIP_DEVICE_ID_7810 0x7810 113 /* The native component can have its vendor/device id's overridden 114 * in vendor-specific implementations. Such devices can be handled 115 * by making a change here, in id_table. 116 */ 117 #define USB_VENDOR_ID_BANDB 0x0856 118 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22 119 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00 120 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24 121 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01 122 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29 123 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30 124 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31 125 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32 126 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 127 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02 128 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 129 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03 130 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24 131 132 /* This driver also supports 133 * ATEN UC2324 device using Moschip MCS7840 134 * ATEN UC2322 device using Moschip MCS7820 135 */ 136 #define USB_VENDOR_ID_ATENINTL 0x0557 137 #define ATENINTL_DEVICE_ID_UC2324 0x2011 138 #define ATENINTL_DEVICE_ID_UC2322 0x7820 139 140 /* Interrupt Routine Defines */ 141 142 #define SERIAL_IIR_RLS 0x06 143 #define SERIAL_IIR_MS 0x00 144 145 /* 146 * Emulation of the bit mask on the LINE STATUS REGISTER. 147 */ 148 #define SERIAL_LSR_DR 0x0001 149 #define SERIAL_LSR_OE 0x0002 150 #define SERIAL_LSR_PE 0x0004 151 #define SERIAL_LSR_FE 0x0008 152 #define SERIAL_LSR_BI 0x0010 153 154 #define MOS_MSR_DELTA_CTS 0x10 155 #define MOS_MSR_DELTA_DSR 0x20 156 #define MOS_MSR_DELTA_RI 0x40 157 #define MOS_MSR_DELTA_CD 0x80 158 159 /* Serial Port register Address */ 160 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) 161 #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) 162 #define LINE_CONTROL_REGISTER ((__u16)(0x03)) 163 #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) 164 #define LINE_STATUS_REGISTER ((__u16)(0x05)) 165 #define MODEM_STATUS_REGISTER ((__u16)(0x06)) 166 #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) 167 #define DIVISOR_LATCH_LSB ((__u16)(0x00)) 168 #define DIVISOR_LATCH_MSB ((__u16)(0x01)) 169 170 #define CLK_MULTI_REGISTER ((__u16)(0x02)) 171 #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) 172 #define GPIO_REGISTER ((__u16)(0x07)) 173 174 #define SERIAL_LCR_DLAB ((__u16)(0x0080)) 175 176 /* 177 * URB POOL related defines 178 */ 179 #define NUM_URBS 16 /* URB Count */ 180 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 181 182 /* LED on/off milliseconds*/ 183 #define LED_ON_MS 500 184 #define LED_OFF_MS 500 185 186 static int device_type; 187 188 static const struct usb_device_id id_table[] = { 189 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 190 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 191 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)}, 192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, 193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, 194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, 195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, 196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, 197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, 198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, 199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, 200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, 202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, 204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, 205 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 206 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 207 {} /* terminating entry */ 208 }; 209 MODULE_DEVICE_TABLE(usb, id_table); 210 211 /* This structure holds all of the local port information */ 212 213 struct moschip_port { 214 int port_num; /*Actual port number in the device(1,2,etc) */ 215 struct urb *write_urb; /* write URB for this port */ 216 struct urb *read_urb; /* read URB for this port */ 217 __u8 shadowLCR; /* last LCR value received */ 218 __u8 shadowMCR; /* last MCR value received */ 219 char open; 220 char open_ports; 221 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 222 struct usb_serial_port *port; /* loop back to the owner of this object */ 223 224 /* Offsets */ 225 __u8 SpRegOffset; 226 __u8 ControlRegOffset; 227 __u8 DcrRegOffset; 228 /* for processing control URBS in interrupt context */ 229 struct urb *control_urb; 230 struct usb_ctrlrequest *dr; 231 char *ctrl_buf; 232 int MsrLsr; 233 234 spinlock_t pool_lock; 235 struct urb *write_urb_pool[NUM_URBS]; 236 char busy[NUM_URBS]; 237 bool read_urb_busy; 238 239 /* For device(s) with LED indicator */ 240 bool has_led; 241 bool led_flag; 242 struct timer_list led_timer1; /* Timer for LED on */ 243 struct timer_list led_timer2; /* Timer for LED off */ 244 }; 245 246 /* 247 * mos7840_set_reg_sync 248 * To set the Control register by calling usb_fill_control_urb function 249 * by passing usb_sndctrlpipe function as parameter. 250 */ 251 252 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 253 __u16 val) 254 { 255 struct usb_device *dev = port->serial->dev; 256 val = val & 0x00ff; 257 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val); 258 259 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 260 MCS_WR_RTYPE, val, reg, NULL, 0, 261 MOS_WDR_TIMEOUT); 262 } 263 264 /* 265 * mos7840_get_reg_sync 266 * To set the Uart register by calling usb_fill_control_urb function by 267 * passing usb_rcvctrlpipe function as parameter. 268 */ 269 270 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 271 __u16 *val) 272 { 273 struct usb_device *dev = port->serial->dev; 274 int ret = 0; 275 u8 *buf; 276 277 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 278 if (!buf) 279 return -ENOMEM; 280 281 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 282 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, 283 MOS_WDR_TIMEOUT); 284 *val = buf[0]; 285 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val); 286 287 kfree(buf); 288 return ret; 289 } 290 291 /* 292 * mos7840_set_uart_reg 293 * To set the Uart register by calling usb_fill_control_urb function by 294 * passing usb_sndctrlpipe function as parameter. 295 */ 296 297 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 298 __u16 val) 299 { 300 301 struct usb_device *dev = port->serial->dev; 302 val = val & 0x00ff; 303 /* For the UART control registers, the application number need 304 to be Or'ed */ 305 if (port->serial->num_ports == 4) { 306 val |= ((__u16)port->port_number + 1) << 8; 307 } else { 308 if (port->port_number == 0) { 309 val |= ((__u16)port->port_number + 1) << 8; 310 } else { 311 val |= ((__u16)port->port_number + 2) << 8; 312 } 313 } 314 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val); 315 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 316 MCS_WR_RTYPE, val, reg, NULL, 0, 317 MOS_WDR_TIMEOUT); 318 319 } 320 321 /* 322 * mos7840_get_uart_reg 323 * To set the Control register by calling usb_fill_control_urb function 324 * by passing usb_rcvctrlpipe function as parameter. 325 */ 326 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 327 __u16 *val) 328 { 329 struct usb_device *dev = port->serial->dev; 330 int ret = 0; 331 __u16 Wval; 332 u8 *buf; 333 334 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 335 if (!buf) 336 return -ENOMEM; 337 338 /* Wval is same as application number */ 339 if (port->serial->num_ports == 4) { 340 Wval = ((__u16)port->port_number + 1) << 8; 341 } else { 342 if (port->port_number == 0) { 343 Wval = ((__u16)port->port_number + 1) << 8; 344 } else { 345 Wval = ((__u16)port->port_number + 2) << 8; 346 } 347 } 348 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval); 349 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 350 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, 351 MOS_WDR_TIMEOUT); 352 *val = buf[0]; 353 354 kfree(buf); 355 return ret; 356 } 357 358 static void mos7840_dump_serial_port(struct usb_serial_port *port, 359 struct moschip_port *mos7840_port) 360 { 361 362 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 363 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset); 364 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset); 365 366 } 367 368 /************************************************************************/ 369 /************************************************************************/ 370 /* I N T E R F A C E F U N C T I O N S */ 371 /* I N T E R F A C E F U N C T I O N S */ 372 /************************************************************************/ 373 /************************************************************************/ 374 375 static inline void mos7840_set_port_private(struct usb_serial_port *port, 376 struct moschip_port *data) 377 { 378 usb_set_serial_port_data(port, (void *)data); 379 } 380 381 static inline struct moschip_port *mos7840_get_port_private(struct 382 usb_serial_port 383 *port) 384 { 385 return (struct moschip_port *)usb_get_serial_port_data(port); 386 } 387 388 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 389 { 390 struct moschip_port *mos7840_port; 391 struct async_icount *icount; 392 mos7840_port = port; 393 if (new_msr & 394 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 395 MOS_MSR_DELTA_CD)) { 396 icount = &mos7840_port->port->icount; 397 398 /* update input line counters */ 399 if (new_msr & MOS_MSR_DELTA_CTS) 400 icount->cts++; 401 if (new_msr & MOS_MSR_DELTA_DSR) 402 icount->dsr++; 403 if (new_msr & MOS_MSR_DELTA_CD) 404 icount->dcd++; 405 if (new_msr & MOS_MSR_DELTA_RI) 406 icount->rng++; 407 408 wake_up_interruptible(&port->port->port.delta_msr_wait); 409 } 410 } 411 412 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 413 { 414 struct async_icount *icount; 415 416 if (new_lsr & SERIAL_LSR_BI) { 417 /* 418 * Parity and Framing errors only count if they 419 * occur exclusive of a break being 420 * received. 421 */ 422 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 423 } 424 425 /* update input line counters */ 426 icount = &port->port->icount; 427 if (new_lsr & SERIAL_LSR_BI) 428 icount->brk++; 429 if (new_lsr & SERIAL_LSR_OE) 430 icount->overrun++; 431 if (new_lsr & SERIAL_LSR_PE) 432 icount->parity++; 433 if (new_lsr & SERIAL_LSR_FE) 434 icount->frame++; 435 } 436 437 /************************************************************************/ 438 /************************************************************************/ 439 /* U S B C A L L B A C K F U N C T I O N S */ 440 /* U S B C A L L B A C K F U N C T I O N S */ 441 /************************************************************************/ 442 /************************************************************************/ 443 444 static void mos7840_control_callback(struct urb *urb) 445 { 446 unsigned char *data; 447 struct moschip_port *mos7840_port; 448 struct device *dev = &urb->dev->dev; 449 __u8 regval = 0x0; 450 int status = urb->status; 451 452 mos7840_port = urb->context; 453 454 switch (status) { 455 case 0: 456 /* success */ 457 break; 458 case -ECONNRESET: 459 case -ENOENT: 460 case -ESHUTDOWN: 461 /* this urb is terminated, clean up */ 462 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); 463 return; 464 default: 465 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); 466 return; 467 } 468 469 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length); 470 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__, 471 mos7840_port->MsrLsr, mos7840_port->port_num); 472 data = urb->transfer_buffer; 473 regval = (__u8) data[0]; 474 dev_dbg(dev, "%s data is %x\n", __func__, regval); 475 if (mos7840_port->MsrLsr == 0) 476 mos7840_handle_new_msr(mos7840_port, regval); 477 else if (mos7840_port->MsrLsr == 1) 478 mos7840_handle_new_lsr(mos7840_port, regval); 479 } 480 481 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 482 __u16 *val) 483 { 484 struct usb_device *dev = mcs->port->serial->dev; 485 struct usb_ctrlrequest *dr = mcs->dr; 486 unsigned char *buffer = mcs->ctrl_buf; 487 int ret; 488 489 dr->bRequestType = MCS_RD_RTYPE; 490 dr->bRequest = MCS_RDREQ; 491 dr->wValue = cpu_to_le16(Wval); /* 0 */ 492 dr->wIndex = cpu_to_le16(reg); 493 dr->wLength = cpu_to_le16(2); 494 495 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 496 (unsigned char *)dr, buffer, 2, 497 mos7840_control_callback, mcs); 498 mcs->control_urb->transfer_buffer_length = 2; 499 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 500 return ret; 501 } 502 503 static void mos7840_set_led_callback(struct urb *urb) 504 { 505 switch (urb->status) { 506 case 0: 507 /* Success */ 508 break; 509 case -ECONNRESET: 510 case -ENOENT: 511 case -ESHUTDOWN: 512 /* This urb is terminated, clean up */ 513 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d", 514 __func__, urb->status); 515 break; 516 default: 517 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d", 518 __func__, urb->status); 519 } 520 } 521 522 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, 523 __u16 reg) 524 { 525 struct usb_device *dev = mcs->port->serial->dev; 526 struct usb_ctrlrequest *dr = mcs->dr; 527 528 dr->bRequestType = MCS_WR_RTYPE; 529 dr->bRequest = MCS_WRREQ; 530 dr->wValue = cpu_to_le16(wval); 531 dr->wIndex = cpu_to_le16(reg); 532 dr->wLength = cpu_to_le16(0); 533 534 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0), 535 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL); 536 537 usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 538 } 539 540 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, 541 __u16 val) 542 { 543 struct usb_device *dev = port->serial->dev; 544 545 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, 546 val, reg, NULL, 0, MOS_WDR_TIMEOUT); 547 } 548 549 static void mos7840_led_off(unsigned long arg) 550 { 551 struct moschip_port *mcs = (struct moschip_port *) arg; 552 553 /* Turn off LED */ 554 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER); 555 mod_timer(&mcs->led_timer2, 556 jiffies + msecs_to_jiffies(LED_OFF_MS)); 557 } 558 559 static void mos7840_led_flag_off(unsigned long arg) 560 { 561 struct moschip_port *mcs = (struct moschip_port *) arg; 562 563 mcs->led_flag = false; 564 } 565 566 /***************************************************************************** 567 * mos7840_interrupt_callback 568 * this is the callback function for when we have received data on the 569 * interrupt endpoint. 570 *****************************************************************************/ 571 572 static void mos7840_interrupt_callback(struct urb *urb) 573 { 574 int result; 575 int length; 576 struct moschip_port *mos7840_port; 577 struct usb_serial *serial; 578 __u16 Data; 579 unsigned char *data; 580 __u8 sp[5], st; 581 int i, rv = 0; 582 __u16 wval, wreg = 0; 583 int status = urb->status; 584 585 switch (status) { 586 case 0: 587 /* success */ 588 break; 589 case -ECONNRESET: 590 case -ENOENT: 591 case -ESHUTDOWN: 592 /* this urb is terminated, clean up */ 593 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 594 __func__, status); 595 return; 596 default: 597 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", 598 __func__, status); 599 goto exit; 600 } 601 602 length = urb->actual_length; 603 data = urb->transfer_buffer; 604 605 serial = urb->context; 606 607 /* Moschip get 5 bytes 608 * Byte 1 IIR Port 1 (port.number is 0) 609 * Byte 2 IIR Port 2 (port.number is 1) 610 * Byte 3 IIR Port 3 (port.number is 2) 611 * Byte 4 IIR Port 4 (port.number is 3) 612 * Byte 5 FIFO status for both */ 613 614 if (length && length > 5) { 615 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n"); 616 return; 617 } 618 619 sp[0] = (__u8) data[0]; 620 sp[1] = (__u8) data[1]; 621 sp[2] = (__u8) data[2]; 622 sp[3] = (__u8) data[3]; 623 st = (__u8) data[4]; 624 625 for (i = 0; i < serial->num_ports; i++) { 626 mos7840_port = mos7840_get_port_private(serial->port[i]); 627 wval = ((__u16)serial->port[i]->port_number + 1) << 8; 628 if (mos7840_port->open) { 629 if (sp[i] & 0x01) { 630 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i); 631 } else { 632 switch (sp[i] & 0x0f) { 633 case SERIAL_IIR_RLS: 634 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i); 635 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n"); 636 mos7840_port->MsrLsr = 1; 637 wreg = LINE_STATUS_REGISTER; 638 break; 639 case SERIAL_IIR_MS: 640 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i); 641 mos7840_port->MsrLsr = 0; 642 wreg = MODEM_STATUS_REGISTER; 643 break; 644 } 645 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 646 } 647 } 648 } 649 if (!(rv < 0)) 650 /* the completion handler for the control urb will resubmit */ 651 return; 652 exit: 653 result = usb_submit_urb(urb, GFP_ATOMIC); 654 if (result) { 655 dev_err(&urb->dev->dev, 656 "%s - Error %d submitting interrupt urb\n", 657 __func__, result); 658 } 659 } 660 661 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 662 const char *function) 663 { 664 if (!port) { 665 pr_debug("%s - port == NULL\n", function); 666 return -1; 667 } 668 if (!port->serial) { 669 pr_debug("%s - port->serial == NULL\n", function); 670 return -1; 671 } 672 673 return 0; 674 } 675 676 /* Inline functions to check the sanity of a pointer that is passed to us */ 677 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 678 const char *function) 679 { 680 if (!serial) { 681 pr_debug("%s - serial == NULL\n", function); 682 return -1; 683 } 684 if (!serial->type) { 685 pr_debug("%s - serial->type == NULL!\n", function); 686 return -1; 687 } 688 689 return 0; 690 } 691 692 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 693 const char *function) 694 { 695 /* if no port was specified, or it fails a paranoia check */ 696 if (!port || 697 mos7840_port_paranoia_check(port, function) || 698 mos7840_serial_paranoia_check(port->serial, function)) { 699 /* then say that we don't have a valid usb_serial thing, 700 * which will end up genrating -ENODEV return values */ 701 return NULL; 702 } 703 704 return port->serial; 705 } 706 707 /***************************************************************************** 708 * mos7840_bulk_in_callback 709 * this is the callback function for when we have received data on the 710 * bulk in endpoint. 711 *****************************************************************************/ 712 713 static void mos7840_bulk_in_callback(struct urb *urb) 714 { 715 int retval; 716 unsigned char *data; 717 struct usb_serial *serial; 718 struct usb_serial_port *port; 719 struct moschip_port *mos7840_port; 720 int status = urb->status; 721 722 mos7840_port = urb->context; 723 if (!mos7840_port) 724 return; 725 726 if (status) { 727 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); 728 mos7840_port->read_urb_busy = false; 729 return; 730 } 731 732 port = mos7840_port->port; 733 if (mos7840_port_paranoia_check(port, __func__)) { 734 mos7840_port->read_urb_busy = false; 735 return; 736 } 737 738 serial = mos7840_get_usb_serial(port, __func__); 739 if (!serial) { 740 mos7840_port->read_urb_busy = false; 741 return; 742 } 743 744 data = urb->transfer_buffer; 745 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); 746 747 if (urb->actual_length) { 748 struct tty_port *tport = &mos7840_port->port->port; 749 tty_insert_flip_string(tport, data, urb->actual_length); 750 tty_flip_buffer_push(tport); 751 port->icount.rx += urb->actual_length; 752 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx); 753 } 754 755 if (!mos7840_port->read_urb) { 756 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n"); 757 mos7840_port->read_urb_busy = false; 758 return; 759 } 760 761 /* Turn on LED */ 762 if (mos7840_port->has_led && !mos7840_port->led_flag) { 763 mos7840_port->led_flag = true; 764 mos7840_set_led_async(mos7840_port, 0x0301, 765 MODEM_CONTROL_REGISTER); 766 mod_timer(&mos7840_port->led_timer1, 767 jiffies + msecs_to_jiffies(LED_ON_MS)); 768 } 769 770 mos7840_port->read_urb_busy = true; 771 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 772 773 if (retval) { 774 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); 775 mos7840_port->read_urb_busy = false; 776 } 777 } 778 779 /***************************************************************************** 780 * mos7840_bulk_out_data_callback 781 * this is the callback function for when we have finished sending 782 * serial data on the bulk out endpoint. 783 *****************************************************************************/ 784 785 static void mos7840_bulk_out_data_callback(struct urb *urb) 786 { 787 struct moschip_port *mos7840_port; 788 struct usb_serial_port *port; 789 int status = urb->status; 790 int i; 791 792 mos7840_port = urb->context; 793 port = mos7840_port->port; 794 spin_lock(&mos7840_port->pool_lock); 795 for (i = 0; i < NUM_URBS; i++) { 796 if (urb == mos7840_port->write_urb_pool[i]) { 797 mos7840_port->busy[i] = 0; 798 break; 799 } 800 } 801 spin_unlock(&mos7840_port->pool_lock); 802 803 if (status) { 804 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status); 805 return; 806 } 807 808 if (mos7840_port_paranoia_check(port, __func__)) 809 return; 810 811 if (mos7840_port->open) 812 tty_port_tty_wakeup(&port->port); 813 814 } 815 816 /************************************************************************/ 817 /* D R I V E R T T Y I N T E R F A C E F U N C T I O N S */ 818 /************************************************************************/ 819 #ifdef MCSSerialProbe 820 static int mos7840_serial_probe(struct usb_serial *serial, 821 const struct usb_device_id *id) 822 { 823 824 /*need to implement the mode_reg reading and updating\ 825 structures usb_serial_ device_type\ 826 (i.e num_ports, num_bulkin,bulkout etc) */ 827 /* Also we can update the changes attach */ 828 return 1; 829 } 830 #endif 831 832 /***************************************************************************** 833 * mos7840_open 834 * this function is called by the tty driver when a port is opened 835 * If successful, we return 0 836 * Otherwise we return a negative error number. 837 *****************************************************************************/ 838 839 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 840 { 841 int response; 842 int j; 843 struct usb_serial *serial; 844 struct urb *urb; 845 __u16 Data; 846 int status; 847 struct moschip_port *mos7840_port; 848 struct moschip_port *port0; 849 850 if (mos7840_port_paranoia_check(port, __func__)) 851 return -ENODEV; 852 853 serial = port->serial; 854 855 if (mos7840_serial_paranoia_check(serial, __func__)) 856 return -ENODEV; 857 858 mos7840_port = mos7840_get_port_private(port); 859 port0 = mos7840_get_port_private(serial->port[0]); 860 861 if (mos7840_port == NULL || port0 == NULL) 862 return -ENODEV; 863 864 usb_clear_halt(serial->dev, port->write_urb->pipe); 865 usb_clear_halt(serial->dev, port->read_urb->pipe); 866 port0->open_ports++; 867 868 /* Initialising the write urb pool */ 869 for (j = 0; j < NUM_URBS; ++j) { 870 urb = usb_alloc_urb(0, GFP_KERNEL); 871 mos7840_port->write_urb_pool[j] = urb; 872 873 if (urb == NULL) { 874 dev_err(&port->dev, "No more urbs???\n"); 875 continue; 876 } 877 878 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 879 GFP_KERNEL); 880 if (!urb->transfer_buffer) { 881 usb_free_urb(urb); 882 mos7840_port->write_urb_pool[j] = NULL; 883 dev_err(&port->dev, 884 "%s-out of memory for urb buffers.\n", 885 __func__); 886 continue; 887 } 888 } 889 890 /***************************************************************************** 891 * Initialize MCS7840 -- Write Init values to corresponding Registers 892 * 893 * Register Index 894 * 1 : IER 895 * 2 : FCR 896 * 3 : LCR 897 * 4 : MCR 898 * 899 * 0x08 : SP1/2 Control Reg 900 *****************************************************************************/ 901 902 /* NEED to check the following Block */ 903 904 Data = 0x0; 905 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 906 if (status < 0) { 907 dev_dbg(&port->dev, "Reading Spreg failed\n"); 908 goto err; 909 } 910 Data |= 0x80; 911 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 912 if (status < 0) { 913 dev_dbg(&port->dev, "writing Spreg failed\n"); 914 goto err; 915 } 916 917 Data &= ~0x80; 918 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 919 if (status < 0) { 920 dev_dbg(&port->dev, "writing Spreg failed\n"); 921 goto err; 922 } 923 /* End of block to be checked */ 924 925 Data = 0x0; 926 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 927 &Data); 928 if (status < 0) { 929 dev_dbg(&port->dev, "Reading Controlreg failed\n"); 930 goto err; 931 } 932 Data |= 0x08; /* Driver done bit */ 933 Data |= 0x20; /* rx_disable */ 934 status = mos7840_set_reg_sync(port, 935 mos7840_port->ControlRegOffset, Data); 936 if (status < 0) { 937 dev_dbg(&port->dev, "writing Controlreg failed\n"); 938 goto err; 939 } 940 /* do register settings here */ 941 /* Set all regs to the device default values. */ 942 /*********************************** 943 * First Disable all interrupts. 944 ***********************************/ 945 Data = 0x00; 946 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 947 if (status < 0) { 948 dev_dbg(&port->dev, "disabling interrupts failed\n"); 949 goto err; 950 } 951 /* Set FIFO_CONTROL_REGISTER to the default value */ 952 Data = 0x00; 953 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 954 if (status < 0) { 955 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 956 goto err; 957 } 958 959 Data = 0xcf; 960 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 961 if (status < 0) { 962 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 963 goto err; 964 } 965 966 Data = 0x03; 967 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 968 mos7840_port->shadowLCR = Data; 969 970 Data = 0x0b; 971 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 972 mos7840_port->shadowMCR = Data; 973 974 Data = 0x00; 975 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 976 mos7840_port->shadowLCR = Data; 977 978 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 979 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 980 981 Data = 0x0c; 982 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 983 984 Data = 0x0; 985 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 986 987 Data = 0x00; 988 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 989 990 Data = Data & ~SERIAL_LCR_DLAB; 991 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 992 mos7840_port->shadowLCR = Data; 993 994 /* clearing Bulkin and Bulkout Fifo */ 995 Data = 0x0; 996 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 997 998 Data = Data | 0x0c; 999 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1000 1001 Data = Data & ~0x0c; 1002 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1003 /* Finally enable all interrupts */ 1004 Data = 0x0c; 1005 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1006 1007 /* clearing rx_disable */ 1008 Data = 0x0; 1009 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1010 &Data); 1011 Data = Data & ~0x20; 1012 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1013 Data); 1014 1015 /* rx_negate */ 1016 Data = 0x0; 1017 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1018 &Data); 1019 Data = Data | 0x10; 1020 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1021 Data); 1022 1023 /* Check to see if we've set up our endpoint info yet * 1024 * (can't set it up in mos7840_startup as the structures * 1025 * were not set up at that time.) */ 1026 if (port0->open_ports == 1) { 1027 if (serial->port[0]->interrupt_in_buffer == NULL) { 1028 /* set up interrupt urb */ 1029 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1030 serial->dev, 1031 usb_rcvintpipe(serial->dev, 1032 serial->port[0]->interrupt_in_endpointAddress), 1033 serial->port[0]->interrupt_in_buffer, 1034 serial->port[0]->interrupt_in_urb-> 1035 transfer_buffer_length, 1036 mos7840_interrupt_callback, 1037 serial, 1038 serial->port[0]->interrupt_in_urb->interval); 1039 1040 /* start interrupt read for mos7840 * 1041 * will continue as long as mos7840 is connected */ 1042 1043 response = 1044 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1045 GFP_KERNEL); 1046 if (response) { 1047 dev_err(&port->dev, "%s - Error %d submitting " 1048 "interrupt urb\n", __func__, response); 1049 } 1050 1051 } 1052 1053 } 1054 1055 /* see if we've set up our endpoint info yet * 1056 * (can't set it up in mos7840_startup as the * 1057 * structures were not set up at that time.) */ 1058 1059 dev_dbg(&port->dev, "port number is %d\n", port->port_number); 1060 dev_dbg(&port->dev, "minor number is %d\n", port->minor); 1061 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress); 1062 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress); 1063 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress); 1064 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num); 1065 mos7840_port->read_urb = port->read_urb; 1066 1067 /* set up our bulk in urb */ 1068 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1069 usb_fill_bulk_urb(mos7840_port->read_urb, 1070 serial->dev, 1071 usb_rcvbulkpipe(serial->dev, 1072 (port->bulk_in_endpointAddress) + 2), 1073 port->bulk_in_buffer, 1074 mos7840_port->read_urb->transfer_buffer_length, 1075 mos7840_bulk_in_callback, mos7840_port); 1076 } else { 1077 usb_fill_bulk_urb(mos7840_port->read_urb, 1078 serial->dev, 1079 usb_rcvbulkpipe(serial->dev, 1080 port->bulk_in_endpointAddress), 1081 port->bulk_in_buffer, 1082 mos7840_port->read_urb->transfer_buffer_length, 1083 mos7840_bulk_in_callback, mos7840_port); 1084 } 1085 1086 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress); 1087 mos7840_port->read_urb_busy = true; 1088 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1089 if (response) { 1090 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1091 __func__, response); 1092 mos7840_port->read_urb_busy = false; 1093 } 1094 1095 /* initialize our wait queues */ 1096 init_waitqueue_head(&mos7840_port->wait_chase); 1097 1098 /* initialize our port settings */ 1099 /* Must set to enable ints! */ 1100 mos7840_port->shadowMCR = MCR_MASTER_IE; 1101 /* send a open port command */ 1102 mos7840_port->open = 1; 1103 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1104 1105 return 0; 1106 err: 1107 for (j = 0; j < NUM_URBS; ++j) { 1108 urb = mos7840_port->write_urb_pool[j]; 1109 if (!urb) 1110 continue; 1111 kfree(urb->transfer_buffer); 1112 usb_free_urb(urb); 1113 } 1114 return status; 1115 } 1116 1117 /***************************************************************************** 1118 * mos7840_chars_in_buffer 1119 * this function is called by the tty driver when it wants to know how many 1120 * bytes of data we currently have outstanding in the port (data that has 1121 * been written, but hasn't made it out the port yet) 1122 * If successful, we return the number of bytes left to be written in the 1123 * system, 1124 * Otherwise we return zero. 1125 *****************************************************************************/ 1126 1127 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1128 { 1129 struct usb_serial_port *port = tty->driver_data; 1130 int i; 1131 int chars = 0; 1132 unsigned long flags; 1133 struct moschip_port *mos7840_port; 1134 1135 if (mos7840_port_paranoia_check(port, __func__)) 1136 return 0; 1137 1138 mos7840_port = mos7840_get_port_private(port); 1139 if (mos7840_port == NULL) 1140 return 0; 1141 1142 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1143 for (i = 0; i < NUM_URBS; ++i) { 1144 if (mos7840_port->busy[i]) { 1145 struct urb *urb = mos7840_port->write_urb_pool[i]; 1146 chars += urb->transfer_buffer_length; 1147 } 1148 } 1149 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1150 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 1151 return chars; 1152 1153 } 1154 1155 /***************************************************************************** 1156 * mos7840_close 1157 * this function is called by the tty driver when a port is closed 1158 *****************************************************************************/ 1159 1160 static void mos7840_close(struct usb_serial_port *port) 1161 { 1162 struct usb_serial *serial; 1163 struct moschip_port *mos7840_port; 1164 struct moschip_port *port0; 1165 int j; 1166 __u16 Data; 1167 1168 if (mos7840_port_paranoia_check(port, __func__)) 1169 return; 1170 1171 serial = mos7840_get_usb_serial(port, __func__); 1172 if (!serial) 1173 return; 1174 1175 mos7840_port = mos7840_get_port_private(port); 1176 port0 = mos7840_get_port_private(serial->port[0]); 1177 1178 if (mos7840_port == NULL || port0 == NULL) 1179 return; 1180 1181 for (j = 0; j < NUM_URBS; ++j) 1182 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1183 1184 /* Freeing Write URBs */ 1185 for (j = 0; j < NUM_URBS; ++j) { 1186 if (mos7840_port->write_urb_pool[j]) { 1187 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1188 kfree(mos7840_port->write_urb_pool[j]-> 1189 transfer_buffer); 1190 1191 usb_free_urb(mos7840_port->write_urb_pool[j]); 1192 } 1193 } 1194 1195 usb_kill_urb(mos7840_port->write_urb); 1196 usb_kill_urb(mos7840_port->read_urb); 1197 mos7840_port->read_urb_busy = false; 1198 1199 port0->open_ports--; 1200 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports); 1201 if (port0->open_ports == 0) { 1202 if (serial->port[0]->interrupt_in_urb) { 1203 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n"); 1204 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1205 } 1206 } 1207 1208 if (mos7840_port->write_urb) { 1209 /* if this urb had a transfer buffer already (old tx) free it */ 1210 kfree(mos7840_port->write_urb->transfer_buffer); 1211 usb_free_urb(mos7840_port->write_urb); 1212 } 1213 1214 Data = 0x0; 1215 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1216 1217 Data = 0x00; 1218 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1219 1220 mos7840_port->open = 0; 1221 } 1222 1223 /************************************************************************ 1224 * 1225 * mos7840_block_until_chase_response 1226 * 1227 * This function will block the close until one of the following: 1228 * 1. Response to our Chase comes from mos7840 1229 * 2. A timeout of 10 seconds without activity has expired 1230 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1231 * 1232 ************************************************************************/ 1233 1234 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1235 struct moschip_port *mos7840_port) 1236 { 1237 int timeout = msecs_to_jiffies(1000); 1238 int wait = 10; 1239 int count; 1240 1241 while (1) { 1242 count = mos7840_chars_in_buffer(tty); 1243 1244 /* Check for Buffer status */ 1245 if (count <= 0) 1246 return; 1247 1248 /* Block the thread for a while */ 1249 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1250 timeout); 1251 /* No activity.. count down section */ 1252 wait--; 1253 if (wait == 0) { 1254 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__); 1255 return; 1256 } else { 1257 /* Reset timeout value back to seconds */ 1258 wait = 10; 1259 } 1260 } 1261 1262 } 1263 1264 /***************************************************************************** 1265 * mos7840_break 1266 * this function sends a break to the port 1267 *****************************************************************************/ 1268 static void mos7840_break(struct tty_struct *tty, int break_state) 1269 { 1270 struct usb_serial_port *port = tty->driver_data; 1271 unsigned char data; 1272 struct usb_serial *serial; 1273 struct moschip_port *mos7840_port; 1274 1275 if (mos7840_port_paranoia_check(port, __func__)) 1276 return; 1277 1278 serial = mos7840_get_usb_serial(port, __func__); 1279 if (!serial) 1280 return; 1281 1282 mos7840_port = mos7840_get_port_private(port); 1283 1284 if (mos7840_port == NULL) 1285 return; 1286 1287 /* flush and block until tx is empty */ 1288 mos7840_block_until_chase_response(tty, mos7840_port); 1289 1290 if (break_state == -1) 1291 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1292 else 1293 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1294 1295 /* FIXME: no locking on shadowLCR anywhere in driver */ 1296 mos7840_port->shadowLCR = data; 1297 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1298 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1299 mos7840_port->shadowLCR); 1300 } 1301 1302 /***************************************************************************** 1303 * mos7840_write_room 1304 * this function is called by the tty driver when it wants to know how many 1305 * bytes of data we can accept for a specific port. 1306 * If successful, we return the amount of room that we have for this port 1307 * Otherwise we return a negative error number. 1308 *****************************************************************************/ 1309 1310 static int mos7840_write_room(struct tty_struct *tty) 1311 { 1312 struct usb_serial_port *port = tty->driver_data; 1313 int i; 1314 int room = 0; 1315 unsigned long flags; 1316 struct moschip_port *mos7840_port; 1317 1318 if (mos7840_port_paranoia_check(port, __func__)) 1319 return -1; 1320 1321 mos7840_port = mos7840_get_port_private(port); 1322 if (mos7840_port == NULL) 1323 return -1; 1324 1325 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1326 for (i = 0; i < NUM_URBS; ++i) { 1327 if (!mos7840_port->busy[i]) 1328 room += URB_TRANSFER_BUFFER_SIZE; 1329 } 1330 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1331 1332 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1333 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); 1334 return room; 1335 1336 } 1337 1338 /***************************************************************************** 1339 * mos7840_write 1340 * this function is called by the tty driver when data should be written to 1341 * the port. 1342 * If successful, we return the number of bytes written, otherwise we 1343 * return a negative error number. 1344 *****************************************************************************/ 1345 1346 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1347 const unsigned char *data, int count) 1348 { 1349 int status; 1350 int i; 1351 int bytes_sent = 0; 1352 int transfer_size; 1353 unsigned long flags; 1354 1355 struct moschip_port *mos7840_port; 1356 struct usb_serial *serial; 1357 struct urb *urb; 1358 /* __u16 Data; */ 1359 const unsigned char *current_position = data; 1360 unsigned char *data1; 1361 1362 #ifdef NOTMOS7840 1363 Data = 0x00; 1364 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1365 mos7840_port->shadowLCR = Data; 1366 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data); 1367 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1368 1369 /* Data = 0x03; */ 1370 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1371 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1372 1373 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1374 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1375 1376 /* Data = 0x0c; */ 1377 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1378 Data = 0x00; 1379 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1380 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data); 1381 1382 Data = 0x0; 1383 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1384 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data); 1385 1386 Data = Data & ~SERIAL_LCR_DLAB; 1387 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1388 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1389 #endif 1390 1391 if (mos7840_port_paranoia_check(port, __func__)) 1392 return -1; 1393 1394 serial = port->serial; 1395 if (mos7840_serial_paranoia_check(serial, __func__)) 1396 return -1; 1397 1398 mos7840_port = mos7840_get_port_private(port); 1399 if (mos7840_port == NULL) 1400 return -1; 1401 1402 /* try to find a free urb in the list */ 1403 urb = NULL; 1404 1405 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1406 for (i = 0; i < NUM_URBS; ++i) { 1407 if (!mos7840_port->busy[i]) { 1408 mos7840_port->busy[i] = 1; 1409 urb = mos7840_port->write_urb_pool[i]; 1410 dev_dbg(&port->dev, "URB:%d\n", i); 1411 break; 1412 } 1413 } 1414 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1415 1416 if (urb == NULL) { 1417 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); 1418 goto exit; 1419 } 1420 1421 if (urb->transfer_buffer == NULL) { 1422 urb->transfer_buffer = 1423 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1424 1425 if (urb->transfer_buffer == NULL) { 1426 dev_err_console(port, "%s no more kernel memory...\n", 1427 __func__); 1428 goto exit; 1429 } 1430 } 1431 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1432 1433 memcpy(urb->transfer_buffer, current_position, transfer_size); 1434 1435 /* fill urb with data and submit */ 1436 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1437 usb_fill_bulk_urb(urb, 1438 serial->dev, 1439 usb_sndbulkpipe(serial->dev, 1440 (port->bulk_out_endpointAddress) + 2), 1441 urb->transfer_buffer, 1442 transfer_size, 1443 mos7840_bulk_out_data_callback, mos7840_port); 1444 } else { 1445 usb_fill_bulk_urb(urb, 1446 serial->dev, 1447 usb_sndbulkpipe(serial->dev, 1448 port->bulk_out_endpointAddress), 1449 urb->transfer_buffer, 1450 transfer_size, 1451 mos7840_bulk_out_data_callback, mos7840_port); 1452 } 1453 1454 data1 = urb->transfer_buffer; 1455 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); 1456 1457 /* Turn on LED */ 1458 if (mos7840_port->has_led && !mos7840_port->led_flag) { 1459 mos7840_port->led_flag = true; 1460 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301); 1461 mod_timer(&mos7840_port->led_timer1, 1462 jiffies + msecs_to_jiffies(LED_ON_MS)); 1463 } 1464 1465 /* send it down the pipe */ 1466 status = usb_submit_urb(urb, GFP_ATOMIC); 1467 1468 if (status) { 1469 mos7840_port->busy[i] = 0; 1470 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 1471 "with status = %d\n", __func__, status); 1472 bytes_sent = status; 1473 goto exit; 1474 } 1475 bytes_sent = transfer_size; 1476 port->icount.tx += transfer_size; 1477 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx); 1478 exit: 1479 return bytes_sent; 1480 1481 } 1482 1483 /***************************************************************************** 1484 * mos7840_throttle 1485 * this function is called by the tty driver when it wants to stop the data 1486 * being read from the port. 1487 *****************************************************************************/ 1488 1489 static void mos7840_throttle(struct tty_struct *tty) 1490 { 1491 struct usb_serial_port *port = tty->driver_data; 1492 struct moschip_port *mos7840_port; 1493 int status; 1494 1495 if (mos7840_port_paranoia_check(port, __func__)) 1496 return; 1497 1498 mos7840_port = mos7840_get_port_private(port); 1499 1500 if (mos7840_port == NULL) 1501 return; 1502 1503 if (!mos7840_port->open) { 1504 dev_dbg(&port->dev, "%s", "port not opened\n"); 1505 return; 1506 } 1507 1508 /* if we are implementing XON/XOFF, send the stop character */ 1509 if (I_IXOFF(tty)) { 1510 unsigned char stop_char = STOP_CHAR(tty); 1511 status = mos7840_write(tty, port, &stop_char, 1); 1512 if (status <= 0) 1513 return; 1514 } 1515 /* if we are implementing RTS/CTS, toggle that line */ 1516 if (tty->termios.c_cflag & CRTSCTS) { 1517 mos7840_port->shadowMCR &= ~MCR_RTS; 1518 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1519 mos7840_port->shadowMCR); 1520 if (status < 0) 1521 return; 1522 } 1523 } 1524 1525 /***************************************************************************** 1526 * mos7840_unthrottle 1527 * this function is called by the tty driver when it wants to resume 1528 * the data being read from the port (called after mos7840_throttle is 1529 * called) 1530 *****************************************************************************/ 1531 static void mos7840_unthrottle(struct tty_struct *tty) 1532 { 1533 struct usb_serial_port *port = tty->driver_data; 1534 int status; 1535 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1536 1537 if (mos7840_port_paranoia_check(port, __func__)) 1538 return; 1539 1540 if (mos7840_port == NULL) 1541 return; 1542 1543 if (!mos7840_port->open) { 1544 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1545 return; 1546 } 1547 1548 /* if we are implementing XON/XOFF, send the start character */ 1549 if (I_IXOFF(tty)) { 1550 unsigned char start_char = START_CHAR(tty); 1551 status = mos7840_write(tty, port, &start_char, 1); 1552 if (status <= 0) 1553 return; 1554 } 1555 1556 /* if we are implementing RTS/CTS, toggle that line */ 1557 if (tty->termios.c_cflag & CRTSCTS) { 1558 mos7840_port->shadowMCR |= MCR_RTS; 1559 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1560 mos7840_port->shadowMCR); 1561 if (status < 0) 1562 return; 1563 } 1564 } 1565 1566 static int mos7840_tiocmget(struct tty_struct *tty) 1567 { 1568 struct usb_serial_port *port = tty->driver_data; 1569 struct moschip_port *mos7840_port; 1570 unsigned int result; 1571 __u16 msr; 1572 __u16 mcr; 1573 int status; 1574 mos7840_port = mos7840_get_port_private(port); 1575 1576 if (mos7840_port == NULL) 1577 return -ENODEV; 1578 1579 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1580 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1581 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1582 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1583 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1584 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1585 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1586 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1587 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1588 1589 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 1590 1591 return result; 1592 } 1593 1594 static int mos7840_tiocmset(struct tty_struct *tty, 1595 unsigned int set, unsigned int clear) 1596 { 1597 struct usb_serial_port *port = tty->driver_data; 1598 struct moschip_port *mos7840_port; 1599 unsigned int mcr; 1600 int status; 1601 1602 mos7840_port = mos7840_get_port_private(port); 1603 1604 if (mos7840_port == NULL) 1605 return -ENODEV; 1606 1607 /* FIXME: What locks the port registers ? */ 1608 mcr = mos7840_port->shadowMCR; 1609 if (clear & TIOCM_RTS) 1610 mcr &= ~MCR_RTS; 1611 if (clear & TIOCM_DTR) 1612 mcr &= ~MCR_DTR; 1613 if (clear & TIOCM_LOOP) 1614 mcr &= ~MCR_LOOPBACK; 1615 1616 if (set & TIOCM_RTS) 1617 mcr |= MCR_RTS; 1618 if (set & TIOCM_DTR) 1619 mcr |= MCR_DTR; 1620 if (set & TIOCM_LOOP) 1621 mcr |= MCR_LOOPBACK; 1622 1623 mos7840_port->shadowMCR = mcr; 1624 1625 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1626 if (status < 0) { 1627 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); 1628 return status; 1629 } 1630 1631 return 0; 1632 } 1633 1634 /***************************************************************************** 1635 * mos7840_calc_baud_rate_divisor 1636 * this function calculates the proper baud rate divisor for the specified 1637 * baud rate. 1638 *****************************************************************************/ 1639 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, 1640 int baudRate, int *divisor, 1641 __u16 *clk_sel_val) 1642 { 1643 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); 1644 1645 if (baudRate <= 115200) { 1646 *divisor = 115200 / baudRate; 1647 *clk_sel_val = 0x0; 1648 } 1649 if ((baudRate > 115200) && (baudRate <= 230400)) { 1650 *divisor = 230400 / baudRate; 1651 *clk_sel_val = 0x10; 1652 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1653 *divisor = 403200 / baudRate; 1654 *clk_sel_val = 0x20; 1655 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1656 *divisor = 460800 / baudRate; 1657 *clk_sel_val = 0x30; 1658 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1659 *divisor = 806400 / baudRate; 1660 *clk_sel_val = 0x40; 1661 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1662 *divisor = 921600 / baudRate; 1663 *clk_sel_val = 0x50; 1664 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1665 *divisor = 1572864 / baudRate; 1666 *clk_sel_val = 0x60; 1667 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1668 *divisor = 3145728 / baudRate; 1669 *clk_sel_val = 0x70; 1670 } 1671 return 0; 1672 1673 #ifdef NOTMCS7840 1674 1675 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1676 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1677 *divisor = mos7840_divisor_table[i].Divisor; 1678 return 0; 1679 } 1680 } 1681 1682 /* After trying for all the standard baud rates * 1683 * Try calculating the divisor for this baud rate */ 1684 1685 if (baudrate > 75 && baudrate < 230400) { 1686 /* get the divisor */ 1687 custom = (__u16) (230400L / baudrate); 1688 1689 /* Check for round off */ 1690 round1 = (__u16) (2304000L / baudrate); 1691 round = (__u16) (round1 - (custom * 10)); 1692 if (round > 4) 1693 custom++; 1694 *divisor = custom; 1695 1696 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom); 1697 return 0; 1698 } 1699 1700 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n"); 1701 return -1; 1702 #endif 1703 } 1704 1705 /***************************************************************************** 1706 * mos7840_send_cmd_write_baud_rate 1707 * this function sends the proper command to change the baud rate of the 1708 * specified port. 1709 *****************************************************************************/ 1710 1711 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1712 int baudRate) 1713 { 1714 int divisor = 0; 1715 int status; 1716 __u16 Data; 1717 unsigned char number; 1718 __u16 clk_sel_val; 1719 struct usb_serial_port *port; 1720 1721 if (mos7840_port == NULL) 1722 return -1; 1723 1724 port = mos7840_port->port; 1725 if (mos7840_port_paranoia_check(port, __func__)) 1726 return -1; 1727 1728 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1729 return -1; 1730 1731 number = mos7840_port->port->port_number; 1732 1733 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate); 1734 /* reset clk_uart_sel in spregOffset */ 1735 if (baudRate > 115200) { 1736 #ifdef HW_flow_control 1737 /* NOTE: need to see the pther register to modify */ 1738 /* setting h/w flow control bit to 1 */ 1739 Data = 0x2b; 1740 mos7840_port->shadowMCR = Data; 1741 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1742 Data); 1743 if (status < 0) { 1744 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1745 return -1; 1746 } 1747 #endif 1748 1749 } else { 1750 #ifdef HW_flow_control 1751 /* setting h/w flow control bit to 0 */ 1752 Data = 0xb; 1753 mos7840_port->shadowMCR = Data; 1754 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1755 Data); 1756 if (status < 0) { 1757 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1758 return -1; 1759 } 1760 #endif 1761 1762 } 1763 1764 if (1) { /* baudRate <= 115200) */ 1765 clk_sel_val = 0x0; 1766 Data = 0x0; 1767 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, 1768 &clk_sel_val); 1769 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1770 &Data); 1771 if (status < 0) { 1772 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); 1773 return -1; 1774 } 1775 Data = (Data & 0x8f) | clk_sel_val; 1776 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1777 Data); 1778 if (status < 0) { 1779 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1780 return -1; 1781 } 1782 /* Calculate the Divisor */ 1783 1784 if (status) { 1785 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1786 return status; 1787 } 1788 /* Enable access to divisor latch */ 1789 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1790 mos7840_port->shadowLCR = Data; 1791 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1792 1793 /* Write the divisor */ 1794 Data = (unsigned char)(divisor & 0xff); 1795 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); 1796 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1797 1798 Data = (unsigned char)((divisor & 0xff00) >> 8); 1799 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); 1800 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1801 1802 /* Disable access to divisor latch */ 1803 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1804 mos7840_port->shadowLCR = Data; 1805 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1806 1807 } 1808 return status; 1809 } 1810 1811 /***************************************************************************** 1812 * mos7840_change_port_settings 1813 * This routine is called to set the UART on the device to match 1814 * the specified new settings. 1815 *****************************************************************************/ 1816 1817 static void mos7840_change_port_settings(struct tty_struct *tty, 1818 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1819 { 1820 int baud; 1821 unsigned cflag; 1822 unsigned iflag; 1823 __u8 lData; 1824 __u8 lParity; 1825 __u8 lStop; 1826 int status; 1827 __u16 Data; 1828 struct usb_serial_port *port; 1829 struct usb_serial *serial; 1830 1831 if (mos7840_port == NULL) 1832 return; 1833 1834 port = mos7840_port->port; 1835 1836 if (mos7840_port_paranoia_check(port, __func__)) 1837 return; 1838 1839 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1840 return; 1841 1842 serial = port->serial; 1843 1844 if (!mos7840_port->open) { 1845 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1846 return; 1847 } 1848 1849 lData = LCR_BITS_8; 1850 lStop = LCR_STOP_1; 1851 lParity = LCR_PAR_NONE; 1852 1853 cflag = tty->termios.c_cflag; 1854 iflag = tty->termios.c_iflag; 1855 1856 /* Change the number of bits */ 1857 if (cflag & CSIZE) { 1858 switch (cflag & CSIZE) { 1859 case CS5: 1860 lData = LCR_BITS_5; 1861 break; 1862 1863 case CS6: 1864 lData = LCR_BITS_6; 1865 break; 1866 1867 case CS7: 1868 lData = LCR_BITS_7; 1869 break; 1870 default: 1871 case CS8: 1872 lData = LCR_BITS_8; 1873 break; 1874 } 1875 } 1876 /* Change the Parity bit */ 1877 if (cflag & PARENB) { 1878 if (cflag & PARODD) { 1879 lParity = LCR_PAR_ODD; 1880 dev_dbg(&port->dev, "%s - parity = odd\n", __func__); 1881 } else { 1882 lParity = LCR_PAR_EVEN; 1883 dev_dbg(&port->dev, "%s - parity = even\n", __func__); 1884 } 1885 1886 } else { 1887 dev_dbg(&port->dev, "%s - parity = none\n", __func__); 1888 } 1889 1890 if (cflag & CMSPAR) 1891 lParity = lParity | 0x20; 1892 1893 /* Change the Stop bit */ 1894 if (cflag & CSTOPB) { 1895 lStop = LCR_STOP_2; 1896 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); 1897 } else { 1898 lStop = LCR_STOP_1; 1899 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); 1900 } 1901 1902 /* Update the LCR with the correct value */ 1903 mos7840_port->shadowLCR &= 1904 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1905 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1906 1907 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, 1908 mos7840_port->shadowLCR); 1909 /* Disable Interrupts */ 1910 Data = 0x00; 1911 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1912 1913 Data = 0x00; 1914 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1915 1916 Data = 0xcf; 1917 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1918 1919 /* Send the updated LCR value to the mos7840 */ 1920 Data = mos7840_port->shadowLCR; 1921 1922 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1923 1924 Data = 0x00b; 1925 mos7840_port->shadowMCR = Data; 1926 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1927 Data = 0x00b; 1928 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1929 1930 /* set up the MCR register and send it to the mos7840 */ 1931 1932 mos7840_port->shadowMCR = MCR_MASTER_IE; 1933 if (cflag & CBAUD) 1934 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1935 1936 if (cflag & CRTSCTS) 1937 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1938 else 1939 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 1940 1941 Data = mos7840_port->shadowMCR; 1942 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1943 1944 /* Determine divisor based on baud rate */ 1945 baud = tty_get_baud_rate(tty); 1946 1947 if (!baud) { 1948 /* pick a default, any default... */ 1949 dev_dbg(&port->dev, "%s", "Picked default baud...\n"); 1950 baud = 9600; 1951 } 1952 1953 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); 1954 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 1955 1956 /* Enable Interrupts */ 1957 Data = 0x0c; 1958 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1959 1960 if (mos7840_port->read_urb_busy == false) { 1961 mos7840_port->read_urb_busy = true; 1962 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 1963 if (status) { 1964 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1965 status); 1966 mos7840_port->read_urb_busy = false; 1967 } 1968 } 1969 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, 1970 mos7840_port->shadowLCR); 1971 } 1972 1973 /***************************************************************************** 1974 * mos7840_set_termios 1975 * this function is called by the tty driver when it wants to change 1976 * the termios structure 1977 *****************************************************************************/ 1978 1979 static void mos7840_set_termios(struct tty_struct *tty, 1980 struct usb_serial_port *port, 1981 struct ktermios *old_termios) 1982 { 1983 int status; 1984 unsigned int cflag; 1985 struct usb_serial *serial; 1986 struct moschip_port *mos7840_port; 1987 1988 if (mos7840_port_paranoia_check(port, __func__)) 1989 return; 1990 1991 serial = port->serial; 1992 1993 if (mos7840_serial_paranoia_check(serial, __func__)) 1994 return; 1995 1996 mos7840_port = mos7840_get_port_private(port); 1997 1998 if (mos7840_port == NULL) 1999 return; 2000 2001 if (!mos7840_port->open) { 2002 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 2003 return; 2004 } 2005 2006 dev_dbg(&port->dev, "%s", "setting termios - \n"); 2007 2008 cflag = tty->termios.c_cflag; 2009 2010 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, 2011 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); 2012 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, 2013 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2014 2015 /* change the port settings to the new ones specified */ 2016 2017 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2018 2019 if (!mos7840_port->read_urb) { 2020 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n"); 2021 return; 2022 } 2023 2024 if (mos7840_port->read_urb_busy == false) { 2025 mos7840_port->read_urb_busy = true; 2026 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2027 if (status) { 2028 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 2029 status); 2030 mos7840_port->read_urb_busy = false; 2031 } 2032 } 2033 } 2034 2035 /***************************************************************************** 2036 * mos7840_get_lsr_info - get line status register info 2037 * 2038 * Purpose: Let user call ioctl() to get info when the UART physically 2039 * is emptied. On bus types like RS485, the transmitter must 2040 * release the bus after transmitting. This must be done when 2041 * the transmit shift register is empty, not be done when the 2042 * transmit holding register is empty. This functionality 2043 * allows an RS485 driver to be written in user space. 2044 *****************************************************************************/ 2045 2046 static int mos7840_get_lsr_info(struct tty_struct *tty, 2047 unsigned int __user *value) 2048 { 2049 int count; 2050 unsigned int result = 0; 2051 2052 count = mos7840_chars_in_buffer(tty); 2053 if (count == 0) 2054 result = TIOCSER_TEMT; 2055 2056 if (copy_to_user(value, &result, sizeof(int))) 2057 return -EFAULT; 2058 return 0; 2059 } 2060 2061 /***************************************************************************** 2062 * mos7840_get_serial_info 2063 * function to get information about serial port 2064 *****************************************************************************/ 2065 2066 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2067 struct serial_struct __user *retinfo) 2068 { 2069 struct serial_struct tmp; 2070 2071 if (mos7840_port == NULL) 2072 return -1; 2073 2074 if (!retinfo) 2075 return -EFAULT; 2076 2077 memset(&tmp, 0, sizeof(tmp)); 2078 2079 tmp.type = PORT_16550A; 2080 tmp.line = mos7840_port->port->minor; 2081 tmp.port = mos7840_port->port->port_number; 2082 tmp.irq = 0; 2083 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2084 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2085 tmp.baud_base = 9600; 2086 tmp.close_delay = 5 * HZ; 2087 tmp.closing_wait = 30 * HZ; 2088 2089 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2090 return -EFAULT; 2091 return 0; 2092 } 2093 2094 /***************************************************************************** 2095 * SerialIoctl 2096 * this function handles any ioctl calls to the driver 2097 *****************************************************************************/ 2098 2099 static int mos7840_ioctl(struct tty_struct *tty, 2100 unsigned int cmd, unsigned long arg) 2101 { 2102 struct usb_serial_port *port = tty->driver_data; 2103 void __user *argp = (void __user *)arg; 2104 struct moschip_port *mos7840_port; 2105 2106 if (mos7840_port_paranoia_check(port, __func__)) 2107 return -1; 2108 2109 mos7840_port = mos7840_get_port_private(port); 2110 2111 if (mos7840_port == NULL) 2112 return -1; 2113 2114 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd); 2115 2116 switch (cmd) { 2117 /* return number of bytes available */ 2118 2119 case TIOCSERGETLSR: 2120 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 2121 return mos7840_get_lsr_info(tty, argp); 2122 2123 case TIOCGSERIAL: 2124 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); 2125 return mos7840_get_serial_info(mos7840_port, argp); 2126 2127 case TIOCSSERIAL: 2128 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__); 2129 break; 2130 default: 2131 break; 2132 } 2133 return -ENOIOCTLCMD; 2134 } 2135 2136 static int mos7810_check(struct usb_serial *serial) 2137 { 2138 int i, pass_count = 0; 2139 u8 *buf; 2140 __u16 data = 0, mcr_data = 0; 2141 __u16 test_pattern = 0x55AA; 2142 int res; 2143 2144 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2145 if (!buf) 2146 return 0; /* failed to identify 7810 */ 2147 2148 /* Store MCR setting */ 2149 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2150 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, 2151 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2152 if (res == VENDOR_READ_LENGTH) 2153 mcr_data = *buf; 2154 2155 for (i = 0; i < 16; i++) { 2156 /* Send the 1-bit test pattern out to MCS7810 test pin */ 2157 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2158 MCS_WRREQ, MCS_WR_RTYPE, 2159 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), 2160 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); 2161 2162 /* Read the test pattern back */ 2163 res = usb_control_msg(serial->dev, 2164 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, 2165 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2166 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2167 if (res == VENDOR_READ_LENGTH) 2168 data = *buf; 2169 2170 /* If this is a MCS7810 device, both test patterns must match */ 2171 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) 2172 break; 2173 2174 pass_count++; 2175 } 2176 2177 /* Restore MCR setting */ 2178 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, 2179 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 2180 0, MOS_WDR_TIMEOUT); 2181 2182 kfree(buf); 2183 2184 if (pass_count == 16) 2185 return 1; 2186 2187 return 0; 2188 } 2189 2190 static int mos7840_calc_num_ports(struct usb_serial *serial) 2191 { 2192 __u16 data = 0x00; 2193 u8 *buf; 2194 int mos7840_num_ports; 2195 2196 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2197 if (buf) { 2198 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2199 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2200 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2201 data = *buf; 2202 kfree(buf); 2203 } 2204 2205 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 || 2206 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) { 2207 device_type = serial->dev->descriptor.idProduct; 2208 } else { 2209 /* For a MCS7840 device GPIO0 must be set to 1 */ 2210 if ((data & 0x01) == 1) 2211 device_type = MOSCHIP_DEVICE_ID_7840; 2212 else if (mos7810_check(serial)) 2213 device_type = MOSCHIP_DEVICE_ID_7810; 2214 else 2215 device_type = MOSCHIP_DEVICE_ID_7820; 2216 } 2217 2218 mos7840_num_ports = (device_type >> 4) & 0x000F; 2219 serial->num_bulk_in = mos7840_num_ports; 2220 serial->num_bulk_out = mos7840_num_ports; 2221 serial->num_ports = mos7840_num_ports; 2222 2223 return mos7840_num_ports; 2224 } 2225 2226 static int mos7840_port_probe(struct usb_serial_port *port) 2227 { 2228 struct usb_serial *serial = port->serial; 2229 struct moschip_port *mos7840_port; 2230 int status; 2231 int pnum; 2232 __u16 Data; 2233 2234 /* we set up the pointers to the endpoints in the mos7840_open * 2235 * function, as the structures aren't created yet. */ 2236 2237 pnum = port->port_number; 2238 2239 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); 2240 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2241 if (mos7840_port == NULL) { 2242 dev_err(&port->dev, "%s - Out of memory\n", __func__); 2243 return -ENOMEM; 2244 } 2245 2246 /* Initialize all port interrupt end point to port 0 int 2247 * endpoint. Our device has only one interrupt end point 2248 * common to all port */ 2249 2250 mos7840_port->port = port; 2251 mos7840_set_port_private(port, mos7840_port); 2252 spin_lock_init(&mos7840_port->pool_lock); 2253 2254 /* minor is not initialised until later by 2255 * usb-serial.c:get_free_serial() and cannot therefore be used 2256 * to index device instances */ 2257 mos7840_port->port_num = pnum + 1; 2258 dev_dbg(&port->dev, "port->minor = %d\n", port->minor); 2259 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); 2260 2261 if (mos7840_port->port_num == 1) { 2262 mos7840_port->SpRegOffset = 0x0; 2263 mos7840_port->ControlRegOffset = 0x1; 2264 mos7840_port->DcrRegOffset = 0x4; 2265 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) { 2266 mos7840_port->SpRegOffset = 0x8; 2267 mos7840_port->ControlRegOffset = 0x9; 2268 mos7840_port->DcrRegOffset = 0x16; 2269 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) { 2270 mos7840_port->SpRegOffset = 0xa; 2271 mos7840_port->ControlRegOffset = 0xb; 2272 mos7840_port->DcrRegOffset = 0x19; 2273 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) { 2274 mos7840_port->SpRegOffset = 0xa; 2275 mos7840_port->ControlRegOffset = 0xb; 2276 mos7840_port->DcrRegOffset = 0x19; 2277 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) { 2278 mos7840_port->SpRegOffset = 0xc; 2279 mos7840_port->ControlRegOffset = 0xd; 2280 mos7840_port->DcrRegOffset = 0x1c; 2281 } 2282 mos7840_dump_serial_port(port, mos7840_port); 2283 mos7840_set_port_private(port, mos7840_port); 2284 2285 /* enable rx_disable bit in control register */ 2286 status = mos7840_get_reg_sync(port, 2287 mos7840_port->ControlRegOffset, &Data); 2288 if (status < 0) { 2289 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); 2290 goto out; 2291 } else 2292 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); 2293 Data |= 0x08; /* setting driver done bit */ 2294 Data |= 0x04; /* sp1_bit to have cts change reflect in 2295 modem status reg */ 2296 2297 /* Data |= 0x20; //rx_disable bit */ 2298 status = mos7840_set_reg_sync(port, 2299 mos7840_port->ControlRegOffset, Data); 2300 if (status < 0) { 2301 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2302 goto out; 2303 } else 2304 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); 2305 2306 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2307 and 0x24 in DCR3 */ 2308 Data = 0x01; 2309 status = mos7840_set_reg_sync(port, 2310 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2311 if (status < 0) { 2312 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); 2313 goto out; 2314 } else 2315 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); 2316 2317 Data = 0x05; 2318 status = mos7840_set_reg_sync(port, 2319 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2320 if (status < 0) { 2321 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); 2322 goto out; 2323 } else 2324 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); 2325 2326 Data = 0x24; 2327 status = mos7840_set_reg_sync(port, 2328 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2329 if (status < 0) { 2330 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); 2331 goto out; 2332 } else 2333 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); 2334 2335 /* write values in clkstart0x0 and clkmulti 0x20 */ 2336 Data = 0x0; 2337 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); 2338 if (status < 0) { 2339 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2340 goto out; 2341 } else 2342 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2343 2344 Data = 0x20; 2345 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); 2346 if (status < 0) { 2347 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); 2348 goto error; 2349 } else 2350 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); 2351 2352 /* write value 0x0 to scratchpad register */ 2353 Data = 0x00; 2354 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); 2355 if (status < 0) { 2356 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); 2357 goto out; 2358 } else 2359 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); 2360 2361 /* Zero Length flag register */ 2362 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { 2363 Data = 0xff; 2364 status = mos7840_set_reg_sync(port, 2365 (__u16) (ZLP_REG1 + 2366 ((__u16)mos7840_port->port_num)), Data); 2367 dev_dbg(&port->dev, "ZLIP offset %x\n", 2368 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); 2369 if (status < 0) { 2370 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); 2371 goto out; 2372 } else 2373 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); 2374 } else { 2375 Data = 0xff; 2376 status = mos7840_set_reg_sync(port, 2377 (__u16) (ZLP_REG1 + 2378 ((__u16)mos7840_port->port_num) - 0x1), Data); 2379 dev_dbg(&port->dev, "ZLIP offset %x\n", 2380 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); 2381 if (status < 0) { 2382 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); 2383 goto out; 2384 } else 2385 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); 2386 2387 } 2388 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2389 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2390 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2391 GFP_KERNEL); 2392 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2393 !mos7840_port->dr) { 2394 status = -ENOMEM; 2395 goto error; 2396 } 2397 2398 mos7840_port->has_led = false; 2399 2400 /* Initialize LED timers */ 2401 if (device_type == MOSCHIP_DEVICE_ID_7810) { 2402 mos7840_port->has_led = true; 2403 2404 init_timer(&mos7840_port->led_timer1); 2405 mos7840_port->led_timer1.function = mos7840_led_off; 2406 mos7840_port->led_timer1.expires = 2407 jiffies + msecs_to_jiffies(LED_ON_MS); 2408 mos7840_port->led_timer1.data = (unsigned long)mos7840_port; 2409 2410 init_timer(&mos7840_port->led_timer2); 2411 mos7840_port->led_timer2.function = mos7840_led_flag_off; 2412 mos7840_port->led_timer2.expires = 2413 jiffies + msecs_to_jiffies(LED_OFF_MS); 2414 mos7840_port->led_timer2.data = (unsigned long)mos7840_port; 2415 2416 mos7840_port->led_flag = false; 2417 2418 /* Turn off LED */ 2419 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2420 } 2421 out: 2422 if (pnum == serial->num_ports - 1) { 2423 /* Zero Length flag enable */ 2424 Data = 0x0f; 2425 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2426 if (status < 0) { 2427 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status); 2428 goto error; 2429 } else 2430 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status); 2431 2432 /* setting configuration feature to one */ 2433 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2434 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 2435 MOS_WDR_TIMEOUT); 2436 } 2437 return 0; 2438 error: 2439 kfree(mos7840_port->dr); 2440 kfree(mos7840_port->ctrl_buf); 2441 usb_free_urb(mos7840_port->control_urb); 2442 kfree(mos7840_port); 2443 2444 return status; 2445 } 2446 2447 static int mos7840_port_remove(struct usb_serial_port *port) 2448 { 2449 struct moschip_port *mos7840_port; 2450 2451 mos7840_port = mos7840_get_port_private(port); 2452 2453 if (mos7840_port->has_led) { 2454 /* Turn off LED */ 2455 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2456 2457 del_timer_sync(&mos7840_port->led_timer1); 2458 del_timer_sync(&mos7840_port->led_timer2); 2459 } 2460 usb_kill_urb(mos7840_port->control_urb); 2461 usb_free_urb(mos7840_port->control_urb); 2462 kfree(mos7840_port->ctrl_buf); 2463 kfree(mos7840_port->dr); 2464 kfree(mos7840_port); 2465 2466 return 0; 2467 } 2468 2469 static struct usb_serial_driver moschip7840_4port_device = { 2470 .driver = { 2471 .owner = THIS_MODULE, 2472 .name = "mos7840", 2473 }, 2474 .description = DRIVER_DESC, 2475 .id_table = id_table, 2476 .num_ports = 4, 2477 .open = mos7840_open, 2478 .close = mos7840_close, 2479 .write = mos7840_write, 2480 .write_room = mos7840_write_room, 2481 .chars_in_buffer = mos7840_chars_in_buffer, 2482 .throttle = mos7840_throttle, 2483 .unthrottle = mos7840_unthrottle, 2484 .calc_num_ports = mos7840_calc_num_ports, 2485 #ifdef MCSSerialProbe 2486 .probe = mos7840_serial_probe, 2487 #endif 2488 .ioctl = mos7840_ioctl, 2489 .set_termios = mos7840_set_termios, 2490 .break_ctl = mos7840_break, 2491 .tiocmget = mos7840_tiocmget, 2492 .tiocmset = mos7840_tiocmset, 2493 .tiocmiwait = usb_serial_generic_tiocmiwait, 2494 .get_icount = usb_serial_generic_get_icount, 2495 .port_probe = mos7840_port_probe, 2496 .port_remove = mos7840_port_remove, 2497 .read_bulk_callback = mos7840_bulk_in_callback, 2498 .read_int_callback = mos7840_interrupt_callback, 2499 }; 2500 2501 static struct usb_serial_driver * const serial_drivers[] = { 2502 &moschip7840_4port_device, NULL 2503 }; 2504 2505 module_usb_serial_driver(serial_drivers, id_table); 2506 2507 MODULE_DESCRIPTION(DRIVER_DESC); 2508 MODULE_LICENSE("GPL"); 2509