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 return -1; 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 return -1; 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 return -1; 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 return -1; 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 return -1; 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 return -1; 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 return -1; 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 return -1; 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 } 1107 1108 /***************************************************************************** 1109 * mos7840_chars_in_buffer 1110 * this function is called by the tty driver when it wants to know how many 1111 * bytes of data we currently have outstanding in the port (data that has 1112 * been written, but hasn't made it out the port yet) 1113 * If successful, we return the number of bytes left to be written in the 1114 * system, 1115 * Otherwise we return zero. 1116 *****************************************************************************/ 1117 1118 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1119 { 1120 struct usb_serial_port *port = tty->driver_data; 1121 int i; 1122 int chars = 0; 1123 unsigned long flags; 1124 struct moschip_port *mos7840_port; 1125 1126 if (mos7840_port_paranoia_check(port, __func__)) 1127 return 0; 1128 1129 mos7840_port = mos7840_get_port_private(port); 1130 if (mos7840_port == NULL) 1131 return 0; 1132 1133 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1134 for (i = 0; i < NUM_URBS; ++i) { 1135 if (mos7840_port->busy[i]) { 1136 struct urb *urb = mos7840_port->write_urb_pool[i]; 1137 chars += urb->transfer_buffer_length; 1138 } 1139 } 1140 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1141 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 1142 return chars; 1143 1144 } 1145 1146 /***************************************************************************** 1147 * mos7840_close 1148 * this function is called by the tty driver when a port is closed 1149 *****************************************************************************/ 1150 1151 static void mos7840_close(struct usb_serial_port *port) 1152 { 1153 struct usb_serial *serial; 1154 struct moschip_port *mos7840_port; 1155 struct moschip_port *port0; 1156 int j; 1157 __u16 Data; 1158 1159 if (mos7840_port_paranoia_check(port, __func__)) 1160 return; 1161 1162 serial = mos7840_get_usb_serial(port, __func__); 1163 if (!serial) 1164 return; 1165 1166 mos7840_port = mos7840_get_port_private(port); 1167 port0 = mos7840_get_port_private(serial->port[0]); 1168 1169 if (mos7840_port == NULL || port0 == NULL) 1170 return; 1171 1172 for (j = 0; j < NUM_URBS; ++j) 1173 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1174 1175 /* Freeing Write URBs */ 1176 for (j = 0; j < NUM_URBS; ++j) { 1177 if (mos7840_port->write_urb_pool[j]) { 1178 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1179 kfree(mos7840_port->write_urb_pool[j]-> 1180 transfer_buffer); 1181 1182 usb_free_urb(mos7840_port->write_urb_pool[j]); 1183 } 1184 } 1185 1186 usb_kill_urb(mos7840_port->write_urb); 1187 usb_kill_urb(mos7840_port->read_urb); 1188 mos7840_port->read_urb_busy = false; 1189 1190 port0->open_ports--; 1191 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports); 1192 if (port0->open_ports == 0) { 1193 if (serial->port[0]->interrupt_in_urb) { 1194 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n"); 1195 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1196 } 1197 } 1198 1199 if (mos7840_port->write_urb) { 1200 /* if this urb had a transfer buffer already (old tx) free it */ 1201 kfree(mos7840_port->write_urb->transfer_buffer); 1202 usb_free_urb(mos7840_port->write_urb); 1203 } 1204 1205 Data = 0x0; 1206 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1207 1208 Data = 0x00; 1209 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1210 1211 mos7840_port->open = 0; 1212 } 1213 1214 /************************************************************************ 1215 * 1216 * mos7840_block_until_chase_response 1217 * 1218 * This function will block the close until one of the following: 1219 * 1. Response to our Chase comes from mos7840 1220 * 2. A timeout of 10 seconds without activity has expired 1221 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1222 * 1223 ************************************************************************/ 1224 1225 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1226 struct moschip_port *mos7840_port) 1227 { 1228 int timeout = msecs_to_jiffies(1000); 1229 int wait = 10; 1230 int count; 1231 1232 while (1) { 1233 count = mos7840_chars_in_buffer(tty); 1234 1235 /* Check for Buffer status */ 1236 if (count <= 0) 1237 return; 1238 1239 /* Block the thread for a while */ 1240 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1241 timeout); 1242 /* No activity.. count down section */ 1243 wait--; 1244 if (wait == 0) { 1245 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__); 1246 return; 1247 } else { 1248 /* Reset timeout value back to seconds */ 1249 wait = 10; 1250 } 1251 } 1252 1253 } 1254 1255 /***************************************************************************** 1256 * mos7840_break 1257 * this function sends a break to the port 1258 *****************************************************************************/ 1259 static void mos7840_break(struct tty_struct *tty, int break_state) 1260 { 1261 struct usb_serial_port *port = tty->driver_data; 1262 unsigned char data; 1263 struct usb_serial *serial; 1264 struct moschip_port *mos7840_port; 1265 1266 if (mos7840_port_paranoia_check(port, __func__)) 1267 return; 1268 1269 serial = mos7840_get_usb_serial(port, __func__); 1270 if (!serial) 1271 return; 1272 1273 mos7840_port = mos7840_get_port_private(port); 1274 1275 if (mos7840_port == NULL) 1276 return; 1277 1278 /* flush and block until tx is empty */ 1279 mos7840_block_until_chase_response(tty, mos7840_port); 1280 1281 if (break_state == -1) 1282 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1283 else 1284 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1285 1286 /* FIXME: no locking on shadowLCR anywhere in driver */ 1287 mos7840_port->shadowLCR = data; 1288 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1289 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1290 mos7840_port->shadowLCR); 1291 } 1292 1293 /***************************************************************************** 1294 * mos7840_write_room 1295 * this function is called by the tty driver when it wants to know how many 1296 * bytes of data we can accept for a specific port. 1297 * If successful, we return the amount of room that we have for this port 1298 * Otherwise we return a negative error number. 1299 *****************************************************************************/ 1300 1301 static int mos7840_write_room(struct tty_struct *tty) 1302 { 1303 struct usb_serial_port *port = tty->driver_data; 1304 int i; 1305 int room = 0; 1306 unsigned long flags; 1307 struct moschip_port *mos7840_port; 1308 1309 if (mos7840_port_paranoia_check(port, __func__)) 1310 return -1; 1311 1312 mos7840_port = mos7840_get_port_private(port); 1313 if (mos7840_port == NULL) 1314 return -1; 1315 1316 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1317 for (i = 0; i < NUM_URBS; ++i) { 1318 if (!mos7840_port->busy[i]) 1319 room += URB_TRANSFER_BUFFER_SIZE; 1320 } 1321 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1322 1323 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1324 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); 1325 return room; 1326 1327 } 1328 1329 /***************************************************************************** 1330 * mos7840_write 1331 * this function is called by the tty driver when data should be written to 1332 * the port. 1333 * If successful, we return the number of bytes written, otherwise we 1334 * return a negative error number. 1335 *****************************************************************************/ 1336 1337 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1338 const unsigned char *data, int count) 1339 { 1340 int status; 1341 int i; 1342 int bytes_sent = 0; 1343 int transfer_size; 1344 unsigned long flags; 1345 1346 struct moschip_port *mos7840_port; 1347 struct usb_serial *serial; 1348 struct urb *urb; 1349 /* __u16 Data; */ 1350 const unsigned char *current_position = data; 1351 unsigned char *data1; 1352 1353 #ifdef NOTMOS7840 1354 Data = 0x00; 1355 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1356 mos7840_port->shadowLCR = Data; 1357 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data); 1358 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1359 1360 /* Data = 0x03; */ 1361 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1362 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1363 1364 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1365 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1366 1367 /* Data = 0x0c; */ 1368 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1369 Data = 0x00; 1370 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1371 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data); 1372 1373 Data = 0x0; 1374 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1375 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data); 1376 1377 Data = Data & ~SERIAL_LCR_DLAB; 1378 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1379 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1380 #endif 1381 1382 if (mos7840_port_paranoia_check(port, __func__)) 1383 return -1; 1384 1385 serial = port->serial; 1386 if (mos7840_serial_paranoia_check(serial, __func__)) 1387 return -1; 1388 1389 mos7840_port = mos7840_get_port_private(port); 1390 if (mos7840_port == NULL) 1391 return -1; 1392 1393 /* try to find a free urb in the list */ 1394 urb = NULL; 1395 1396 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1397 for (i = 0; i < NUM_URBS; ++i) { 1398 if (!mos7840_port->busy[i]) { 1399 mos7840_port->busy[i] = 1; 1400 urb = mos7840_port->write_urb_pool[i]; 1401 dev_dbg(&port->dev, "URB:%d\n", i); 1402 break; 1403 } 1404 } 1405 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1406 1407 if (urb == NULL) { 1408 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); 1409 goto exit; 1410 } 1411 1412 if (urb->transfer_buffer == NULL) { 1413 urb->transfer_buffer = 1414 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1415 1416 if (urb->transfer_buffer == NULL) { 1417 dev_err_console(port, "%s no more kernel memory...\n", 1418 __func__); 1419 goto exit; 1420 } 1421 } 1422 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1423 1424 memcpy(urb->transfer_buffer, current_position, transfer_size); 1425 1426 /* fill urb with data and submit */ 1427 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1428 usb_fill_bulk_urb(urb, 1429 serial->dev, 1430 usb_sndbulkpipe(serial->dev, 1431 (port->bulk_out_endpointAddress) + 2), 1432 urb->transfer_buffer, 1433 transfer_size, 1434 mos7840_bulk_out_data_callback, mos7840_port); 1435 } else { 1436 usb_fill_bulk_urb(urb, 1437 serial->dev, 1438 usb_sndbulkpipe(serial->dev, 1439 port->bulk_out_endpointAddress), 1440 urb->transfer_buffer, 1441 transfer_size, 1442 mos7840_bulk_out_data_callback, mos7840_port); 1443 } 1444 1445 data1 = urb->transfer_buffer; 1446 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); 1447 1448 /* Turn on LED */ 1449 if (mos7840_port->has_led && !mos7840_port->led_flag) { 1450 mos7840_port->led_flag = true; 1451 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301); 1452 mod_timer(&mos7840_port->led_timer1, 1453 jiffies + msecs_to_jiffies(LED_ON_MS)); 1454 } 1455 1456 /* send it down the pipe */ 1457 status = usb_submit_urb(urb, GFP_ATOMIC); 1458 1459 if (status) { 1460 mos7840_port->busy[i] = 0; 1461 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 1462 "with status = %d\n", __func__, status); 1463 bytes_sent = status; 1464 goto exit; 1465 } 1466 bytes_sent = transfer_size; 1467 port->icount.tx += transfer_size; 1468 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx); 1469 exit: 1470 return bytes_sent; 1471 1472 } 1473 1474 /***************************************************************************** 1475 * mos7840_throttle 1476 * this function is called by the tty driver when it wants to stop the data 1477 * being read from the port. 1478 *****************************************************************************/ 1479 1480 static void mos7840_throttle(struct tty_struct *tty) 1481 { 1482 struct usb_serial_port *port = tty->driver_data; 1483 struct moschip_port *mos7840_port; 1484 int status; 1485 1486 if (mos7840_port_paranoia_check(port, __func__)) 1487 return; 1488 1489 mos7840_port = mos7840_get_port_private(port); 1490 1491 if (mos7840_port == NULL) 1492 return; 1493 1494 if (!mos7840_port->open) { 1495 dev_dbg(&port->dev, "%s", "port not opened\n"); 1496 return; 1497 } 1498 1499 /* if we are implementing XON/XOFF, send the stop character */ 1500 if (I_IXOFF(tty)) { 1501 unsigned char stop_char = STOP_CHAR(tty); 1502 status = mos7840_write(tty, port, &stop_char, 1); 1503 if (status <= 0) 1504 return; 1505 } 1506 /* if we are implementing RTS/CTS, toggle that line */ 1507 if (tty->termios.c_cflag & CRTSCTS) { 1508 mos7840_port->shadowMCR &= ~MCR_RTS; 1509 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1510 mos7840_port->shadowMCR); 1511 if (status < 0) 1512 return; 1513 } 1514 } 1515 1516 /***************************************************************************** 1517 * mos7840_unthrottle 1518 * this function is called by the tty driver when it wants to resume 1519 * the data being read from the port (called after mos7840_throttle is 1520 * called) 1521 *****************************************************************************/ 1522 static void mos7840_unthrottle(struct tty_struct *tty) 1523 { 1524 struct usb_serial_port *port = tty->driver_data; 1525 int status; 1526 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1527 1528 if (mos7840_port_paranoia_check(port, __func__)) 1529 return; 1530 1531 if (mos7840_port == NULL) 1532 return; 1533 1534 if (!mos7840_port->open) { 1535 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1536 return; 1537 } 1538 1539 /* if we are implementing XON/XOFF, send the start character */ 1540 if (I_IXOFF(tty)) { 1541 unsigned char start_char = START_CHAR(tty); 1542 status = mos7840_write(tty, port, &start_char, 1); 1543 if (status <= 0) 1544 return; 1545 } 1546 1547 /* if we are implementing RTS/CTS, toggle that line */ 1548 if (tty->termios.c_cflag & CRTSCTS) { 1549 mos7840_port->shadowMCR |= MCR_RTS; 1550 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1551 mos7840_port->shadowMCR); 1552 if (status < 0) 1553 return; 1554 } 1555 } 1556 1557 static int mos7840_tiocmget(struct tty_struct *tty) 1558 { 1559 struct usb_serial_port *port = tty->driver_data; 1560 struct moschip_port *mos7840_port; 1561 unsigned int result; 1562 __u16 msr; 1563 __u16 mcr; 1564 int status; 1565 mos7840_port = mos7840_get_port_private(port); 1566 1567 if (mos7840_port == NULL) 1568 return -ENODEV; 1569 1570 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1571 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1572 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1573 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1574 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1575 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1576 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1577 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1578 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1579 1580 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 1581 1582 return result; 1583 } 1584 1585 static int mos7840_tiocmset(struct tty_struct *tty, 1586 unsigned int set, unsigned int clear) 1587 { 1588 struct usb_serial_port *port = tty->driver_data; 1589 struct moschip_port *mos7840_port; 1590 unsigned int mcr; 1591 int status; 1592 1593 mos7840_port = mos7840_get_port_private(port); 1594 1595 if (mos7840_port == NULL) 1596 return -ENODEV; 1597 1598 /* FIXME: What locks the port registers ? */ 1599 mcr = mos7840_port->shadowMCR; 1600 if (clear & TIOCM_RTS) 1601 mcr &= ~MCR_RTS; 1602 if (clear & TIOCM_DTR) 1603 mcr &= ~MCR_DTR; 1604 if (clear & TIOCM_LOOP) 1605 mcr &= ~MCR_LOOPBACK; 1606 1607 if (set & TIOCM_RTS) 1608 mcr |= MCR_RTS; 1609 if (set & TIOCM_DTR) 1610 mcr |= MCR_DTR; 1611 if (set & TIOCM_LOOP) 1612 mcr |= MCR_LOOPBACK; 1613 1614 mos7840_port->shadowMCR = mcr; 1615 1616 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1617 if (status < 0) { 1618 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); 1619 return status; 1620 } 1621 1622 return 0; 1623 } 1624 1625 /***************************************************************************** 1626 * mos7840_calc_baud_rate_divisor 1627 * this function calculates the proper baud rate divisor for the specified 1628 * baud rate. 1629 *****************************************************************************/ 1630 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, 1631 int baudRate, int *divisor, 1632 __u16 *clk_sel_val) 1633 { 1634 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); 1635 1636 if (baudRate <= 115200) { 1637 *divisor = 115200 / baudRate; 1638 *clk_sel_val = 0x0; 1639 } 1640 if ((baudRate > 115200) && (baudRate <= 230400)) { 1641 *divisor = 230400 / baudRate; 1642 *clk_sel_val = 0x10; 1643 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1644 *divisor = 403200 / baudRate; 1645 *clk_sel_val = 0x20; 1646 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1647 *divisor = 460800 / baudRate; 1648 *clk_sel_val = 0x30; 1649 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1650 *divisor = 806400 / baudRate; 1651 *clk_sel_val = 0x40; 1652 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1653 *divisor = 921600 / baudRate; 1654 *clk_sel_val = 0x50; 1655 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1656 *divisor = 1572864 / baudRate; 1657 *clk_sel_val = 0x60; 1658 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1659 *divisor = 3145728 / baudRate; 1660 *clk_sel_val = 0x70; 1661 } 1662 return 0; 1663 1664 #ifdef NOTMCS7840 1665 1666 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1667 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1668 *divisor = mos7840_divisor_table[i].Divisor; 1669 return 0; 1670 } 1671 } 1672 1673 /* After trying for all the standard baud rates * 1674 * Try calculating the divisor for this baud rate */ 1675 1676 if (baudrate > 75 && baudrate < 230400) { 1677 /* get the divisor */ 1678 custom = (__u16) (230400L / baudrate); 1679 1680 /* Check for round off */ 1681 round1 = (__u16) (2304000L / baudrate); 1682 round = (__u16) (round1 - (custom * 10)); 1683 if (round > 4) 1684 custom++; 1685 *divisor = custom; 1686 1687 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom); 1688 return 0; 1689 } 1690 1691 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n"); 1692 return -1; 1693 #endif 1694 } 1695 1696 /***************************************************************************** 1697 * mos7840_send_cmd_write_baud_rate 1698 * this function sends the proper command to change the baud rate of the 1699 * specified port. 1700 *****************************************************************************/ 1701 1702 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1703 int baudRate) 1704 { 1705 int divisor = 0; 1706 int status; 1707 __u16 Data; 1708 unsigned char number; 1709 __u16 clk_sel_val; 1710 struct usb_serial_port *port; 1711 1712 if (mos7840_port == NULL) 1713 return -1; 1714 1715 port = mos7840_port->port; 1716 if (mos7840_port_paranoia_check(port, __func__)) 1717 return -1; 1718 1719 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1720 return -1; 1721 1722 number = mos7840_port->port->port_number; 1723 1724 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate); 1725 /* reset clk_uart_sel in spregOffset */ 1726 if (baudRate > 115200) { 1727 #ifdef HW_flow_control 1728 /* NOTE: need to see the pther register to modify */ 1729 /* setting h/w flow control bit to 1 */ 1730 Data = 0x2b; 1731 mos7840_port->shadowMCR = Data; 1732 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1733 Data); 1734 if (status < 0) { 1735 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1736 return -1; 1737 } 1738 #endif 1739 1740 } else { 1741 #ifdef HW_flow_control 1742 /* setting h/w flow control bit to 0 */ 1743 Data = 0xb; 1744 mos7840_port->shadowMCR = Data; 1745 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1746 Data); 1747 if (status < 0) { 1748 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1749 return -1; 1750 } 1751 #endif 1752 1753 } 1754 1755 if (1) { /* baudRate <= 115200) */ 1756 clk_sel_val = 0x0; 1757 Data = 0x0; 1758 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, 1759 &clk_sel_val); 1760 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1761 &Data); 1762 if (status < 0) { 1763 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); 1764 return -1; 1765 } 1766 Data = (Data & 0x8f) | clk_sel_val; 1767 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1768 Data); 1769 if (status < 0) { 1770 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1771 return -1; 1772 } 1773 /* Calculate the Divisor */ 1774 1775 if (status) { 1776 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1777 return status; 1778 } 1779 /* Enable access to divisor latch */ 1780 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1781 mos7840_port->shadowLCR = Data; 1782 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1783 1784 /* Write the divisor */ 1785 Data = (unsigned char)(divisor & 0xff); 1786 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); 1787 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1788 1789 Data = (unsigned char)((divisor & 0xff00) >> 8); 1790 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); 1791 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1792 1793 /* Disable access to divisor latch */ 1794 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1795 mos7840_port->shadowLCR = Data; 1796 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1797 1798 } 1799 return status; 1800 } 1801 1802 /***************************************************************************** 1803 * mos7840_change_port_settings 1804 * This routine is called to set the UART on the device to match 1805 * the specified new settings. 1806 *****************************************************************************/ 1807 1808 static void mos7840_change_port_settings(struct tty_struct *tty, 1809 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1810 { 1811 int baud; 1812 unsigned cflag; 1813 unsigned iflag; 1814 __u8 lData; 1815 __u8 lParity; 1816 __u8 lStop; 1817 int status; 1818 __u16 Data; 1819 struct usb_serial_port *port; 1820 struct usb_serial *serial; 1821 1822 if (mos7840_port == NULL) 1823 return; 1824 1825 port = mos7840_port->port; 1826 1827 if (mos7840_port_paranoia_check(port, __func__)) 1828 return; 1829 1830 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1831 return; 1832 1833 serial = port->serial; 1834 1835 if (!mos7840_port->open) { 1836 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1837 return; 1838 } 1839 1840 lData = LCR_BITS_8; 1841 lStop = LCR_STOP_1; 1842 lParity = LCR_PAR_NONE; 1843 1844 cflag = tty->termios.c_cflag; 1845 iflag = tty->termios.c_iflag; 1846 1847 /* Change the number of bits */ 1848 if (cflag & CSIZE) { 1849 switch (cflag & CSIZE) { 1850 case CS5: 1851 lData = LCR_BITS_5; 1852 break; 1853 1854 case CS6: 1855 lData = LCR_BITS_6; 1856 break; 1857 1858 case CS7: 1859 lData = LCR_BITS_7; 1860 break; 1861 default: 1862 case CS8: 1863 lData = LCR_BITS_8; 1864 break; 1865 } 1866 } 1867 /* Change the Parity bit */ 1868 if (cflag & PARENB) { 1869 if (cflag & PARODD) { 1870 lParity = LCR_PAR_ODD; 1871 dev_dbg(&port->dev, "%s - parity = odd\n", __func__); 1872 } else { 1873 lParity = LCR_PAR_EVEN; 1874 dev_dbg(&port->dev, "%s - parity = even\n", __func__); 1875 } 1876 1877 } else { 1878 dev_dbg(&port->dev, "%s - parity = none\n", __func__); 1879 } 1880 1881 if (cflag & CMSPAR) 1882 lParity = lParity | 0x20; 1883 1884 /* Change the Stop bit */ 1885 if (cflag & CSTOPB) { 1886 lStop = LCR_STOP_2; 1887 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); 1888 } else { 1889 lStop = LCR_STOP_1; 1890 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); 1891 } 1892 1893 /* Update the LCR with the correct value */ 1894 mos7840_port->shadowLCR &= 1895 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1896 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1897 1898 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, 1899 mos7840_port->shadowLCR); 1900 /* Disable Interrupts */ 1901 Data = 0x00; 1902 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1903 1904 Data = 0x00; 1905 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1906 1907 Data = 0xcf; 1908 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1909 1910 /* Send the updated LCR value to the mos7840 */ 1911 Data = mos7840_port->shadowLCR; 1912 1913 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1914 1915 Data = 0x00b; 1916 mos7840_port->shadowMCR = Data; 1917 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1918 Data = 0x00b; 1919 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1920 1921 /* set up the MCR register and send it to the mos7840 */ 1922 1923 mos7840_port->shadowMCR = MCR_MASTER_IE; 1924 if (cflag & CBAUD) 1925 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1926 1927 if (cflag & CRTSCTS) 1928 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1929 else 1930 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 1931 1932 Data = mos7840_port->shadowMCR; 1933 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1934 1935 /* Determine divisor based on baud rate */ 1936 baud = tty_get_baud_rate(tty); 1937 1938 if (!baud) { 1939 /* pick a default, any default... */ 1940 dev_dbg(&port->dev, "%s", "Picked default baud...\n"); 1941 baud = 9600; 1942 } 1943 1944 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); 1945 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 1946 1947 /* Enable Interrupts */ 1948 Data = 0x0c; 1949 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1950 1951 if (mos7840_port->read_urb_busy == false) { 1952 mos7840_port->read_urb_busy = true; 1953 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 1954 if (status) { 1955 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1956 status); 1957 mos7840_port->read_urb_busy = false; 1958 } 1959 } 1960 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, 1961 mos7840_port->shadowLCR); 1962 } 1963 1964 /***************************************************************************** 1965 * mos7840_set_termios 1966 * this function is called by the tty driver when it wants to change 1967 * the termios structure 1968 *****************************************************************************/ 1969 1970 static void mos7840_set_termios(struct tty_struct *tty, 1971 struct usb_serial_port *port, 1972 struct ktermios *old_termios) 1973 { 1974 int status; 1975 unsigned int cflag; 1976 struct usb_serial *serial; 1977 struct moschip_port *mos7840_port; 1978 1979 if (mos7840_port_paranoia_check(port, __func__)) 1980 return; 1981 1982 serial = port->serial; 1983 1984 if (mos7840_serial_paranoia_check(serial, __func__)) 1985 return; 1986 1987 mos7840_port = mos7840_get_port_private(port); 1988 1989 if (mos7840_port == NULL) 1990 return; 1991 1992 if (!mos7840_port->open) { 1993 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1994 return; 1995 } 1996 1997 dev_dbg(&port->dev, "%s", "setting termios - \n"); 1998 1999 cflag = tty->termios.c_cflag; 2000 2001 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, 2002 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); 2003 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, 2004 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2005 2006 /* change the port settings to the new ones specified */ 2007 2008 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2009 2010 if (!mos7840_port->read_urb) { 2011 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n"); 2012 return; 2013 } 2014 2015 if (mos7840_port->read_urb_busy == false) { 2016 mos7840_port->read_urb_busy = true; 2017 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2018 if (status) { 2019 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 2020 status); 2021 mos7840_port->read_urb_busy = false; 2022 } 2023 } 2024 } 2025 2026 /***************************************************************************** 2027 * mos7840_get_lsr_info - get line status register info 2028 * 2029 * Purpose: Let user call ioctl() to get info when the UART physically 2030 * is emptied. On bus types like RS485, the transmitter must 2031 * release the bus after transmitting. This must be done when 2032 * the transmit shift register is empty, not be done when the 2033 * transmit holding register is empty. This functionality 2034 * allows an RS485 driver to be written in user space. 2035 *****************************************************************************/ 2036 2037 static int mos7840_get_lsr_info(struct tty_struct *tty, 2038 unsigned int __user *value) 2039 { 2040 int count; 2041 unsigned int result = 0; 2042 2043 count = mos7840_chars_in_buffer(tty); 2044 if (count == 0) 2045 result = TIOCSER_TEMT; 2046 2047 if (copy_to_user(value, &result, sizeof(int))) 2048 return -EFAULT; 2049 return 0; 2050 } 2051 2052 /***************************************************************************** 2053 * mos7840_get_serial_info 2054 * function to get information about serial port 2055 *****************************************************************************/ 2056 2057 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2058 struct serial_struct __user *retinfo) 2059 { 2060 struct serial_struct tmp; 2061 2062 if (mos7840_port == NULL) 2063 return -1; 2064 2065 if (!retinfo) 2066 return -EFAULT; 2067 2068 memset(&tmp, 0, sizeof(tmp)); 2069 2070 tmp.type = PORT_16550A; 2071 tmp.line = mos7840_port->port->minor; 2072 tmp.port = mos7840_port->port->port_number; 2073 tmp.irq = 0; 2074 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2075 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2076 tmp.baud_base = 9600; 2077 tmp.close_delay = 5 * HZ; 2078 tmp.closing_wait = 30 * HZ; 2079 2080 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2081 return -EFAULT; 2082 return 0; 2083 } 2084 2085 /***************************************************************************** 2086 * SerialIoctl 2087 * this function handles any ioctl calls to the driver 2088 *****************************************************************************/ 2089 2090 static int mos7840_ioctl(struct tty_struct *tty, 2091 unsigned int cmd, unsigned long arg) 2092 { 2093 struct usb_serial_port *port = tty->driver_data; 2094 void __user *argp = (void __user *)arg; 2095 struct moschip_port *mos7840_port; 2096 2097 if (mos7840_port_paranoia_check(port, __func__)) 2098 return -1; 2099 2100 mos7840_port = mos7840_get_port_private(port); 2101 2102 if (mos7840_port == NULL) 2103 return -1; 2104 2105 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd); 2106 2107 switch (cmd) { 2108 /* return number of bytes available */ 2109 2110 case TIOCSERGETLSR: 2111 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 2112 return mos7840_get_lsr_info(tty, argp); 2113 2114 case TIOCGSERIAL: 2115 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); 2116 return mos7840_get_serial_info(mos7840_port, argp); 2117 2118 case TIOCSSERIAL: 2119 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__); 2120 break; 2121 default: 2122 break; 2123 } 2124 return -ENOIOCTLCMD; 2125 } 2126 2127 static int mos7810_check(struct usb_serial *serial) 2128 { 2129 int i, pass_count = 0; 2130 u8 *buf; 2131 __u16 data = 0, mcr_data = 0; 2132 __u16 test_pattern = 0x55AA; 2133 int res; 2134 2135 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2136 if (!buf) 2137 return 0; /* failed to identify 7810 */ 2138 2139 /* Store MCR setting */ 2140 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2141 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, 2142 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2143 if (res == VENDOR_READ_LENGTH) 2144 mcr_data = *buf; 2145 2146 for (i = 0; i < 16; i++) { 2147 /* Send the 1-bit test pattern out to MCS7810 test pin */ 2148 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2149 MCS_WRREQ, MCS_WR_RTYPE, 2150 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), 2151 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); 2152 2153 /* Read the test pattern back */ 2154 res = usb_control_msg(serial->dev, 2155 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, 2156 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2157 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2158 if (res == VENDOR_READ_LENGTH) 2159 data = *buf; 2160 2161 /* If this is a MCS7810 device, both test patterns must match */ 2162 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) 2163 break; 2164 2165 pass_count++; 2166 } 2167 2168 /* Restore MCR setting */ 2169 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, 2170 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 2171 0, MOS_WDR_TIMEOUT); 2172 2173 kfree(buf); 2174 2175 if (pass_count == 16) 2176 return 1; 2177 2178 return 0; 2179 } 2180 2181 static int mos7840_calc_num_ports(struct usb_serial *serial) 2182 { 2183 __u16 data = 0x00; 2184 u8 *buf; 2185 int mos7840_num_ports; 2186 2187 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2188 if (buf) { 2189 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2190 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2191 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2192 data = *buf; 2193 kfree(buf); 2194 } 2195 2196 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 || 2197 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) { 2198 device_type = serial->dev->descriptor.idProduct; 2199 } else { 2200 /* For a MCS7840 device GPIO0 must be set to 1 */ 2201 if ((data & 0x01) == 1) 2202 device_type = MOSCHIP_DEVICE_ID_7840; 2203 else if (mos7810_check(serial)) 2204 device_type = MOSCHIP_DEVICE_ID_7810; 2205 else 2206 device_type = MOSCHIP_DEVICE_ID_7820; 2207 } 2208 2209 mos7840_num_ports = (device_type >> 4) & 0x000F; 2210 serial->num_bulk_in = mos7840_num_ports; 2211 serial->num_bulk_out = mos7840_num_ports; 2212 serial->num_ports = mos7840_num_ports; 2213 2214 return mos7840_num_ports; 2215 } 2216 2217 static int mos7840_port_probe(struct usb_serial_port *port) 2218 { 2219 struct usb_serial *serial = port->serial; 2220 struct moschip_port *mos7840_port; 2221 int status; 2222 int pnum; 2223 __u16 Data; 2224 2225 /* we set up the pointers to the endpoints in the mos7840_open * 2226 * function, as the structures aren't created yet. */ 2227 2228 pnum = port->port_number; 2229 2230 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); 2231 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2232 if (mos7840_port == NULL) { 2233 dev_err(&port->dev, "%s - Out of memory\n", __func__); 2234 return -ENOMEM; 2235 } 2236 2237 /* Initialize all port interrupt end point to port 0 int 2238 * endpoint. Our device has only one interrupt end point 2239 * common to all port */ 2240 2241 mos7840_port->port = port; 2242 mos7840_set_port_private(port, mos7840_port); 2243 spin_lock_init(&mos7840_port->pool_lock); 2244 2245 /* minor is not initialised until later by 2246 * usb-serial.c:get_free_serial() and cannot therefore be used 2247 * to index device instances */ 2248 mos7840_port->port_num = pnum + 1; 2249 dev_dbg(&port->dev, "port->minor = %d\n", port->minor); 2250 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); 2251 2252 if (mos7840_port->port_num == 1) { 2253 mos7840_port->SpRegOffset = 0x0; 2254 mos7840_port->ControlRegOffset = 0x1; 2255 mos7840_port->DcrRegOffset = 0x4; 2256 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) { 2257 mos7840_port->SpRegOffset = 0x8; 2258 mos7840_port->ControlRegOffset = 0x9; 2259 mos7840_port->DcrRegOffset = 0x16; 2260 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) { 2261 mos7840_port->SpRegOffset = 0xa; 2262 mos7840_port->ControlRegOffset = 0xb; 2263 mos7840_port->DcrRegOffset = 0x19; 2264 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) { 2265 mos7840_port->SpRegOffset = 0xa; 2266 mos7840_port->ControlRegOffset = 0xb; 2267 mos7840_port->DcrRegOffset = 0x19; 2268 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) { 2269 mos7840_port->SpRegOffset = 0xc; 2270 mos7840_port->ControlRegOffset = 0xd; 2271 mos7840_port->DcrRegOffset = 0x1c; 2272 } 2273 mos7840_dump_serial_port(port, mos7840_port); 2274 mos7840_set_port_private(port, mos7840_port); 2275 2276 /* enable rx_disable bit in control register */ 2277 status = mos7840_get_reg_sync(port, 2278 mos7840_port->ControlRegOffset, &Data); 2279 if (status < 0) { 2280 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); 2281 goto out; 2282 } else 2283 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); 2284 Data |= 0x08; /* setting driver done bit */ 2285 Data |= 0x04; /* sp1_bit to have cts change reflect in 2286 modem status reg */ 2287 2288 /* Data |= 0x20; //rx_disable bit */ 2289 status = mos7840_set_reg_sync(port, 2290 mos7840_port->ControlRegOffset, Data); 2291 if (status < 0) { 2292 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2293 goto out; 2294 } else 2295 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); 2296 2297 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2298 and 0x24 in DCR3 */ 2299 Data = 0x01; 2300 status = mos7840_set_reg_sync(port, 2301 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2302 if (status < 0) { 2303 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); 2304 goto out; 2305 } else 2306 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); 2307 2308 Data = 0x05; 2309 status = mos7840_set_reg_sync(port, 2310 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2311 if (status < 0) { 2312 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); 2313 goto out; 2314 } else 2315 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); 2316 2317 Data = 0x24; 2318 status = mos7840_set_reg_sync(port, 2319 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2320 if (status < 0) { 2321 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); 2322 goto out; 2323 } else 2324 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); 2325 2326 /* write values in clkstart0x0 and clkmulti 0x20 */ 2327 Data = 0x0; 2328 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); 2329 if (status < 0) { 2330 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2331 goto out; 2332 } else 2333 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2334 2335 Data = 0x20; 2336 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); 2337 if (status < 0) { 2338 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); 2339 goto error; 2340 } else 2341 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); 2342 2343 /* write value 0x0 to scratchpad register */ 2344 Data = 0x00; 2345 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); 2346 if (status < 0) { 2347 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); 2348 goto out; 2349 } else 2350 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); 2351 2352 /* Zero Length flag register */ 2353 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { 2354 Data = 0xff; 2355 status = mos7840_set_reg_sync(port, 2356 (__u16) (ZLP_REG1 + 2357 ((__u16)mos7840_port->port_num)), Data); 2358 dev_dbg(&port->dev, "ZLIP offset %x\n", 2359 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); 2360 if (status < 0) { 2361 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); 2362 goto out; 2363 } else 2364 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); 2365 } else { 2366 Data = 0xff; 2367 status = mos7840_set_reg_sync(port, 2368 (__u16) (ZLP_REG1 + 2369 ((__u16)mos7840_port->port_num) - 0x1), Data); 2370 dev_dbg(&port->dev, "ZLIP offset %x\n", 2371 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); 2372 if (status < 0) { 2373 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); 2374 goto out; 2375 } else 2376 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); 2377 2378 } 2379 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2380 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2381 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2382 GFP_KERNEL); 2383 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2384 !mos7840_port->dr) { 2385 status = -ENOMEM; 2386 goto error; 2387 } 2388 2389 mos7840_port->has_led = false; 2390 2391 /* Initialize LED timers */ 2392 if (device_type == MOSCHIP_DEVICE_ID_7810) { 2393 mos7840_port->has_led = true; 2394 2395 init_timer(&mos7840_port->led_timer1); 2396 mos7840_port->led_timer1.function = mos7840_led_off; 2397 mos7840_port->led_timer1.expires = 2398 jiffies + msecs_to_jiffies(LED_ON_MS); 2399 mos7840_port->led_timer1.data = (unsigned long)mos7840_port; 2400 2401 init_timer(&mos7840_port->led_timer2); 2402 mos7840_port->led_timer2.function = mos7840_led_flag_off; 2403 mos7840_port->led_timer2.expires = 2404 jiffies + msecs_to_jiffies(LED_OFF_MS); 2405 mos7840_port->led_timer2.data = (unsigned long)mos7840_port; 2406 2407 mos7840_port->led_flag = false; 2408 2409 /* Turn off LED */ 2410 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2411 } 2412 out: 2413 if (pnum == serial->num_ports - 1) { 2414 /* Zero Length flag enable */ 2415 Data = 0x0f; 2416 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2417 if (status < 0) { 2418 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status); 2419 goto error; 2420 } else 2421 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status); 2422 2423 /* setting configuration feature to one */ 2424 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2425 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 2426 MOS_WDR_TIMEOUT); 2427 } 2428 return 0; 2429 error: 2430 kfree(mos7840_port->dr); 2431 kfree(mos7840_port->ctrl_buf); 2432 usb_free_urb(mos7840_port->control_urb); 2433 kfree(mos7840_port); 2434 2435 return status; 2436 } 2437 2438 static int mos7840_port_remove(struct usb_serial_port *port) 2439 { 2440 struct moschip_port *mos7840_port; 2441 2442 mos7840_port = mos7840_get_port_private(port); 2443 2444 if (mos7840_port->has_led) { 2445 /* Turn off LED */ 2446 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2447 2448 del_timer_sync(&mos7840_port->led_timer1); 2449 del_timer_sync(&mos7840_port->led_timer2); 2450 } 2451 usb_kill_urb(mos7840_port->control_urb); 2452 usb_free_urb(mos7840_port->control_urb); 2453 kfree(mos7840_port->ctrl_buf); 2454 kfree(mos7840_port->dr); 2455 kfree(mos7840_port); 2456 2457 return 0; 2458 } 2459 2460 static struct usb_serial_driver moschip7840_4port_device = { 2461 .driver = { 2462 .owner = THIS_MODULE, 2463 .name = "mos7840", 2464 }, 2465 .description = DRIVER_DESC, 2466 .id_table = id_table, 2467 .num_ports = 4, 2468 .open = mos7840_open, 2469 .close = mos7840_close, 2470 .write = mos7840_write, 2471 .write_room = mos7840_write_room, 2472 .chars_in_buffer = mos7840_chars_in_buffer, 2473 .throttle = mos7840_throttle, 2474 .unthrottle = mos7840_unthrottle, 2475 .calc_num_ports = mos7840_calc_num_ports, 2476 #ifdef MCSSerialProbe 2477 .probe = mos7840_serial_probe, 2478 #endif 2479 .ioctl = mos7840_ioctl, 2480 .set_termios = mos7840_set_termios, 2481 .break_ctl = mos7840_break, 2482 .tiocmget = mos7840_tiocmget, 2483 .tiocmset = mos7840_tiocmset, 2484 .tiocmiwait = usb_serial_generic_tiocmiwait, 2485 .get_icount = usb_serial_generic_get_icount, 2486 .port_probe = mos7840_port_probe, 2487 .port_remove = mos7840_port_remove, 2488 .read_bulk_callback = mos7840_bulk_in_callback, 2489 .read_int_callback = mos7840_interrupt_callback, 2490 }; 2491 2492 static struct usb_serial_driver * const serial_drivers[] = { 2493 &moschip7840_4port_device, NULL 2494 }; 2495 2496 module_usb_serial_driver(serial_drivers, id_table); 2497 2498 MODULE_DESCRIPTION(DRIVER_DESC); 2499 MODULE_LICENSE("GPL"); 2500