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/slab.h> 28 #include <linux/tty.h> 29 #include <linux/tty_driver.h> 30 #include <linux/tty_flip.h> 31 #include <linux/module.h> 32 #include <linux/serial.h> 33 #include <linux/usb.h> 34 #include <linux/usb/serial.h> 35 #include <linux/uaccess.h> 36 37 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" 38 39 /* 40 * 16C50 UART register defines 41 */ 42 43 #define LCR_BITS_5 0x00 /* 5 bits/char */ 44 #define LCR_BITS_6 0x01 /* 6 bits/char */ 45 #define LCR_BITS_7 0x02 /* 7 bits/char */ 46 #define LCR_BITS_8 0x03 /* 8 bits/char */ 47 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ 48 49 #define LCR_STOP_1 0x00 /* 1 stop bit */ 50 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ 51 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ 52 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ 53 54 #define LCR_PAR_NONE 0x00 /* No parity */ 55 #define LCR_PAR_ODD 0x08 /* Odd parity */ 56 #define LCR_PAR_EVEN 0x18 /* Even parity */ 57 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ 58 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ 59 #define LCR_PAR_MASK 0x38 /* Mask for parity field */ 60 61 #define LCR_SET_BREAK 0x40 /* Set Break condition */ 62 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ 63 64 #define MCR_DTR 0x01 /* Assert DTR */ 65 #define MCR_RTS 0x02 /* Assert RTS */ 66 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ 67 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ 68 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ 69 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ 70 71 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ 72 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ 73 #define MOS7840_MSR_RI 0x40 /* Current state of RI */ 74 #define MOS7840_MSR_CD 0x80 /* Current state of CD */ 75 76 /* 77 * Defines used for sending commands to port 78 */ 79 80 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */ 81 82 #define MOS_PORT1 0x0200 83 #define MOS_PORT2 0x0300 84 #define MOS_VENREG 0x0000 85 #define MOS_MAX_PORT 0x02 86 #define MOS_WRITE 0x0E 87 #define MOS_READ 0x0D 88 89 /* Requests */ 90 #define MCS_RD_RTYPE 0xC0 91 #define MCS_WR_RTYPE 0x40 92 #define MCS_RDREQ 0x0D 93 #define MCS_WRREQ 0x0E 94 #define MCS_CTRL_TIMEOUT 500 95 #define VENDOR_READ_LENGTH (0x01) 96 97 #define MAX_NAME_LEN 64 98 99 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ 100 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ 101 102 /* For higher baud Rates use TIOCEXBAUD */ 103 #define TIOCEXBAUD 0x5462 104 105 /* vendor id and device id defines */ 106 107 /* The native mos7840/7820 component */ 108 #define USB_VENDOR_ID_MOSCHIP 0x9710 109 #define MOSCHIP_DEVICE_ID_7840 0x7840 110 #define MOSCHIP_DEVICE_ID_7820 0x7820 111 #define MOSCHIP_DEVICE_ID_7810 0x7810 112 /* The native component can have its vendor/device id's overridden 113 * in vendor-specific implementations. Such devices can be handled 114 * by making a change here, in id_table. 115 */ 116 #define USB_VENDOR_ID_BANDB 0x0856 117 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22 118 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00 119 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24 120 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01 121 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29 122 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30 123 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31 124 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32 125 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 126 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02 127 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 128 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03 129 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24 130 131 /* This driver also supports 132 * ATEN UC2324 device using Moschip MCS7840 133 * ATEN UC2322 device using Moschip MCS7820 134 */ 135 #define USB_VENDOR_ID_ATENINTL 0x0557 136 #define ATENINTL_DEVICE_ID_UC2324 0x2011 137 #define ATENINTL_DEVICE_ID_UC2322 0x7820 138 139 /* Interrupt Routine Defines */ 140 141 #define SERIAL_IIR_RLS 0x06 142 #define SERIAL_IIR_MS 0x00 143 144 /* 145 * Emulation of the bit mask on the LINE STATUS REGISTER. 146 */ 147 #define SERIAL_LSR_DR 0x0001 148 #define SERIAL_LSR_OE 0x0002 149 #define SERIAL_LSR_PE 0x0004 150 #define SERIAL_LSR_FE 0x0008 151 #define SERIAL_LSR_BI 0x0010 152 153 #define MOS_MSR_DELTA_CTS 0x10 154 #define MOS_MSR_DELTA_DSR 0x20 155 #define MOS_MSR_DELTA_RI 0x40 156 #define MOS_MSR_DELTA_CD 0x80 157 158 /* Serial Port register Address */ 159 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) 160 #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) 161 #define LINE_CONTROL_REGISTER ((__u16)(0x03)) 162 #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) 163 #define LINE_STATUS_REGISTER ((__u16)(0x05)) 164 #define MODEM_STATUS_REGISTER ((__u16)(0x06)) 165 #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) 166 #define DIVISOR_LATCH_LSB ((__u16)(0x00)) 167 #define DIVISOR_LATCH_MSB ((__u16)(0x01)) 168 169 #define CLK_MULTI_REGISTER ((__u16)(0x02)) 170 #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) 171 #define GPIO_REGISTER ((__u16)(0x07)) 172 173 #define SERIAL_LCR_DLAB ((__u16)(0x0080)) 174 175 /* 176 * URB POOL related defines 177 */ 178 #define NUM_URBS 16 /* URB Count */ 179 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 180 181 /* LED on/off milliseconds*/ 182 #define LED_ON_MS 500 183 #define LED_OFF_MS 500 184 185 enum mos7840_flag { 186 MOS7840_FLAG_CTRL_BUSY, 187 MOS7840_FLAG_LED_BUSY, 188 }; 189 190 static const struct usb_device_id id_table[] = { 191 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 192 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 193 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)}, 194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, 195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, 196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, 197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, 198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, 199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, 200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, 201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, 202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, 204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, 206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, 207 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 208 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 209 {} /* terminating entry */ 210 }; 211 MODULE_DEVICE_TABLE(usb, id_table); 212 213 /* This structure holds all of the local port information */ 214 215 struct moschip_port { 216 int port_num; /*Actual port number in the device(1,2,etc) */ 217 struct urb *write_urb; /* write URB for this port */ 218 struct urb *read_urb; /* read URB for this port */ 219 __u8 shadowLCR; /* last LCR value received */ 220 __u8 shadowMCR; /* last MCR value received */ 221 char open; 222 char open_ports; 223 struct usb_serial_port *port; /* loop back to the owner of this object */ 224 225 /* Offsets */ 226 __u8 SpRegOffset; 227 __u8 ControlRegOffset; 228 __u8 DcrRegOffset; 229 /* for processing control URBS in interrupt context */ 230 struct urb *control_urb; 231 struct usb_ctrlrequest *dr; 232 char *ctrl_buf; 233 int MsrLsr; 234 235 spinlock_t pool_lock; 236 struct urb *write_urb_pool[NUM_URBS]; 237 char busy[NUM_URBS]; 238 bool read_urb_busy; 239 240 /* For device(s) with LED indicator */ 241 bool has_led; 242 struct timer_list led_timer1; /* Timer for LED on */ 243 struct timer_list led_timer2; /* Timer for LED off */ 244 struct urb *led_urb; 245 struct usb_ctrlrequest *led_dr; 246 247 unsigned long flags; 248 }; 249 250 /* 251 * mos7840_set_reg_sync 252 * To set the Control register by calling usb_fill_control_urb function 253 * by passing usb_sndctrlpipe function as parameter. 254 */ 255 256 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 257 __u16 val) 258 { 259 struct usb_device *dev = port->serial->dev; 260 val = val & 0x00ff; 261 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val); 262 263 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 264 MCS_WR_RTYPE, val, reg, NULL, 0, 265 MOS_WDR_TIMEOUT); 266 } 267 268 /* 269 * mos7840_get_reg_sync 270 * To set the Uart register by calling usb_fill_control_urb function by 271 * passing usb_rcvctrlpipe function as parameter. 272 */ 273 274 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 275 __u16 *val) 276 { 277 struct usb_device *dev = port->serial->dev; 278 int ret = 0; 279 u8 *buf; 280 281 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 282 if (!buf) 283 return -ENOMEM; 284 285 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 286 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, 287 MOS_WDR_TIMEOUT); 288 *val = buf[0]; 289 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val); 290 291 kfree(buf); 292 return ret; 293 } 294 295 /* 296 * mos7840_set_uart_reg 297 * To set the Uart register by calling usb_fill_control_urb function by 298 * passing usb_sndctrlpipe function as parameter. 299 */ 300 301 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 302 __u16 val) 303 { 304 305 struct usb_device *dev = port->serial->dev; 306 val = val & 0x00ff; 307 /* For the UART control registers, the application number need 308 to be Or'ed */ 309 if (port->serial->num_ports == 4) { 310 val |= ((__u16)port->port_number + 1) << 8; 311 } else { 312 if (port->port_number == 0) { 313 val |= ((__u16)port->port_number + 1) << 8; 314 } else { 315 val |= ((__u16)port->port_number + 2) << 8; 316 } 317 } 318 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val); 319 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 320 MCS_WR_RTYPE, val, reg, NULL, 0, 321 MOS_WDR_TIMEOUT); 322 323 } 324 325 /* 326 * mos7840_get_uart_reg 327 * To set the Control register by calling usb_fill_control_urb function 328 * by passing usb_rcvctrlpipe function as parameter. 329 */ 330 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 331 __u16 *val) 332 { 333 struct usb_device *dev = port->serial->dev; 334 int ret = 0; 335 __u16 Wval; 336 u8 *buf; 337 338 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 339 if (!buf) 340 return -ENOMEM; 341 342 /* Wval is same as application number */ 343 if (port->serial->num_ports == 4) { 344 Wval = ((__u16)port->port_number + 1) << 8; 345 } else { 346 if (port->port_number == 0) { 347 Wval = ((__u16)port->port_number + 1) << 8; 348 } else { 349 Wval = ((__u16)port->port_number + 2) << 8; 350 } 351 } 352 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval); 353 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 354 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, 355 MOS_WDR_TIMEOUT); 356 *val = buf[0]; 357 358 kfree(buf); 359 return ret; 360 } 361 362 static void mos7840_dump_serial_port(struct usb_serial_port *port, 363 struct moschip_port *mos7840_port) 364 { 365 366 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 367 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset); 368 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset); 369 370 } 371 372 /************************************************************************/ 373 /************************************************************************/ 374 /* I N T E R F A C E F U N C T I O N S */ 375 /* I N T E R F A C E F U N C T I O N S */ 376 /************************************************************************/ 377 /************************************************************************/ 378 379 static inline void mos7840_set_port_private(struct usb_serial_port *port, 380 struct moschip_port *data) 381 { 382 usb_set_serial_port_data(port, (void *)data); 383 } 384 385 static inline struct moschip_port *mos7840_get_port_private(struct 386 usb_serial_port 387 *port) 388 { 389 return (struct moschip_port *)usb_get_serial_port_data(port); 390 } 391 392 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 393 { 394 struct moschip_port *mos7840_port; 395 struct async_icount *icount; 396 mos7840_port = port; 397 if (new_msr & 398 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 399 MOS_MSR_DELTA_CD)) { 400 icount = &mos7840_port->port->icount; 401 402 /* update input line counters */ 403 if (new_msr & MOS_MSR_DELTA_CTS) 404 icount->cts++; 405 if (new_msr & MOS_MSR_DELTA_DSR) 406 icount->dsr++; 407 if (new_msr & MOS_MSR_DELTA_CD) 408 icount->dcd++; 409 if (new_msr & MOS_MSR_DELTA_RI) 410 icount->rng++; 411 412 wake_up_interruptible(&port->port->port.delta_msr_wait); 413 } 414 } 415 416 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 417 { 418 struct async_icount *icount; 419 420 if (new_lsr & SERIAL_LSR_BI) { 421 /* 422 * Parity and Framing errors only count if they 423 * occur exclusive of a break being 424 * received. 425 */ 426 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 427 } 428 429 /* update input line counters */ 430 icount = &port->port->icount; 431 if (new_lsr & SERIAL_LSR_BI) 432 icount->brk++; 433 if (new_lsr & SERIAL_LSR_OE) 434 icount->overrun++; 435 if (new_lsr & SERIAL_LSR_PE) 436 icount->parity++; 437 if (new_lsr & SERIAL_LSR_FE) 438 icount->frame++; 439 } 440 441 /************************************************************************/ 442 /************************************************************************/ 443 /* U S B C A L L B A C K F U N C T I O N S */ 444 /* U S B C A L L B A C K F U N C T I O N S */ 445 /************************************************************************/ 446 /************************************************************************/ 447 448 static void mos7840_control_callback(struct urb *urb) 449 { 450 unsigned char *data; 451 struct moschip_port *mos7840_port; 452 struct device *dev = &urb->dev->dev; 453 __u8 regval = 0x0; 454 int status = urb->status; 455 456 mos7840_port = urb->context; 457 458 switch (status) { 459 case 0: 460 /* success */ 461 break; 462 case -ECONNRESET: 463 case -ENOENT: 464 case -ESHUTDOWN: 465 /* this urb is terminated, clean up */ 466 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); 467 goto out; 468 default: 469 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); 470 goto out; 471 } 472 473 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length); 474 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__, 475 mos7840_port->MsrLsr, mos7840_port->port_num); 476 data = urb->transfer_buffer; 477 regval = (__u8) data[0]; 478 dev_dbg(dev, "%s data is %x\n", __func__, regval); 479 if (mos7840_port->MsrLsr == 0) 480 mos7840_handle_new_msr(mos7840_port, regval); 481 else if (mos7840_port->MsrLsr == 1) 482 mos7840_handle_new_lsr(mos7840_port, regval); 483 out: 484 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags); 485 } 486 487 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 488 __u16 *val) 489 { 490 struct usb_device *dev = mcs->port->serial->dev; 491 struct usb_ctrlrequest *dr = mcs->dr; 492 unsigned char *buffer = mcs->ctrl_buf; 493 int ret; 494 495 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags)) 496 return -EBUSY; 497 498 dr->bRequestType = MCS_RD_RTYPE; 499 dr->bRequest = MCS_RDREQ; 500 dr->wValue = cpu_to_le16(Wval); /* 0 */ 501 dr->wIndex = cpu_to_le16(reg); 502 dr->wLength = cpu_to_le16(2); 503 504 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 505 (unsigned char *)dr, buffer, 2, 506 mos7840_control_callback, mcs); 507 mcs->control_urb->transfer_buffer_length = 2; 508 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 509 if (ret) 510 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags); 511 512 return ret; 513 } 514 515 static void mos7840_set_led_callback(struct urb *urb) 516 { 517 switch (urb->status) { 518 case 0: 519 /* Success */ 520 break; 521 case -ECONNRESET: 522 case -ENOENT: 523 case -ESHUTDOWN: 524 /* This urb is terminated, clean up */ 525 dev_dbg(&urb->dev->dev, "%s - urb shutting down: %d\n", 526 __func__, urb->status); 527 break; 528 default: 529 dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n", 530 __func__, urb->status); 531 } 532 } 533 534 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, 535 __u16 reg) 536 { 537 struct usb_device *dev = mcs->port->serial->dev; 538 struct usb_ctrlrequest *dr = mcs->led_dr; 539 540 dr->bRequestType = MCS_WR_RTYPE; 541 dr->bRequest = MCS_WRREQ; 542 dr->wValue = cpu_to_le16(wval); 543 dr->wIndex = cpu_to_le16(reg); 544 dr->wLength = cpu_to_le16(0); 545 546 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0), 547 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL); 548 549 usb_submit_urb(mcs->led_urb, GFP_ATOMIC); 550 } 551 552 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, 553 __u16 val) 554 { 555 struct usb_device *dev = port->serial->dev; 556 557 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, 558 val, reg, NULL, 0, MOS_WDR_TIMEOUT); 559 } 560 561 static void mos7840_led_off(unsigned long arg) 562 { 563 struct moschip_port *mcs = (struct moschip_port *) arg; 564 565 /* Turn off LED */ 566 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER); 567 mod_timer(&mcs->led_timer2, 568 jiffies + msecs_to_jiffies(LED_OFF_MS)); 569 } 570 571 static void mos7840_led_flag_off(unsigned long arg) 572 { 573 struct moschip_port *mcs = (struct moschip_port *) arg; 574 575 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags); 576 } 577 578 static void mos7840_led_activity(struct usb_serial_port *port) 579 { 580 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 581 582 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags)) 583 return; 584 585 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER); 586 mod_timer(&mos7840_port->led_timer1, 587 jiffies + msecs_to_jiffies(LED_ON_MS)); 588 } 589 590 /***************************************************************************** 591 * mos7840_interrupt_callback 592 * this is the callback function for when we have received data on the 593 * interrupt endpoint. 594 *****************************************************************************/ 595 596 static void mos7840_interrupt_callback(struct urb *urb) 597 { 598 int result; 599 int length; 600 struct moschip_port *mos7840_port; 601 struct usb_serial *serial; 602 __u16 Data; 603 unsigned char *data; 604 __u8 sp[5], st; 605 int i, rv = 0; 606 __u16 wval, wreg = 0; 607 int status = urb->status; 608 609 switch (status) { 610 case 0: 611 /* success */ 612 break; 613 case -ECONNRESET: 614 case -ENOENT: 615 case -ESHUTDOWN: 616 /* this urb is terminated, clean up */ 617 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 618 __func__, status); 619 return; 620 default: 621 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", 622 __func__, status); 623 goto exit; 624 } 625 626 length = urb->actual_length; 627 data = urb->transfer_buffer; 628 629 serial = urb->context; 630 631 /* Moschip get 5 bytes 632 * Byte 1 IIR Port 1 (port.number is 0) 633 * Byte 2 IIR Port 2 (port.number is 1) 634 * Byte 3 IIR Port 3 (port.number is 2) 635 * Byte 4 IIR Port 4 (port.number is 3) 636 * Byte 5 FIFO status for both */ 637 638 if (length && length > 5) { 639 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n"); 640 return; 641 } 642 643 sp[0] = (__u8) data[0]; 644 sp[1] = (__u8) data[1]; 645 sp[2] = (__u8) data[2]; 646 sp[3] = (__u8) data[3]; 647 st = (__u8) data[4]; 648 649 for (i = 0; i < serial->num_ports; i++) { 650 mos7840_port = mos7840_get_port_private(serial->port[i]); 651 wval = ((__u16)serial->port[i]->port_number + 1) << 8; 652 if (mos7840_port->open) { 653 if (sp[i] & 0x01) { 654 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i); 655 } else { 656 switch (sp[i] & 0x0f) { 657 case SERIAL_IIR_RLS: 658 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i); 659 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n"); 660 mos7840_port->MsrLsr = 1; 661 wreg = LINE_STATUS_REGISTER; 662 break; 663 case SERIAL_IIR_MS: 664 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i); 665 mos7840_port->MsrLsr = 0; 666 wreg = MODEM_STATUS_REGISTER; 667 break; 668 } 669 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 670 } 671 } 672 } 673 if (!(rv < 0)) 674 /* the completion handler for the control urb will resubmit */ 675 return; 676 exit: 677 result = usb_submit_urb(urb, GFP_ATOMIC); 678 if (result) { 679 dev_err(&urb->dev->dev, 680 "%s - Error %d submitting interrupt urb\n", 681 __func__, result); 682 } 683 } 684 685 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 686 const char *function) 687 { 688 if (!port) { 689 pr_debug("%s - port == NULL\n", function); 690 return -1; 691 } 692 if (!port->serial) { 693 pr_debug("%s - port->serial == NULL\n", function); 694 return -1; 695 } 696 697 return 0; 698 } 699 700 /* Inline functions to check the sanity of a pointer that is passed to us */ 701 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 702 const char *function) 703 { 704 if (!serial) { 705 pr_debug("%s - serial == NULL\n", function); 706 return -1; 707 } 708 if (!serial->type) { 709 pr_debug("%s - serial->type == NULL!\n", function); 710 return -1; 711 } 712 713 return 0; 714 } 715 716 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 717 const char *function) 718 { 719 /* if no port was specified, or it fails a paranoia check */ 720 if (!port || 721 mos7840_port_paranoia_check(port, function) || 722 mos7840_serial_paranoia_check(port->serial, function)) { 723 /* then say that we don't have a valid usb_serial thing, 724 * which will end up genrating -ENODEV return values */ 725 return NULL; 726 } 727 728 return port->serial; 729 } 730 731 /***************************************************************************** 732 * mos7840_bulk_in_callback 733 * this is the callback function for when we have received data on the 734 * bulk in endpoint. 735 *****************************************************************************/ 736 737 static void mos7840_bulk_in_callback(struct urb *urb) 738 { 739 int retval; 740 unsigned char *data; 741 struct usb_serial *serial; 742 struct usb_serial_port *port; 743 struct moschip_port *mos7840_port; 744 int status = urb->status; 745 746 mos7840_port = urb->context; 747 if (!mos7840_port) 748 return; 749 750 if (status) { 751 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); 752 mos7840_port->read_urb_busy = false; 753 return; 754 } 755 756 port = mos7840_port->port; 757 if (mos7840_port_paranoia_check(port, __func__)) { 758 mos7840_port->read_urb_busy = false; 759 return; 760 } 761 762 serial = mos7840_get_usb_serial(port, __func__); 763 if (!serial) { 764 mos7840_port->read_urb_busy = false; 765 return; 766 } 767 768 data = urb->transfer_buffer; 769 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); 770 771 if (urb->actual_length) { 772 struct tty_port *tport = &mos7840_port->port->port; 773 tty_insert_flip_string(tport, data, urb->actual_length); 774 tty_flip_buffer_push(tport); 775 port->icount.rx += urb->actual_length; 776 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx); 777 } 778 779 if (!mos7840_port->read_urb) { 780 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n"); 781 mos7840_port->read_urb_busy = false; 782 return; 783 } 784 785 if (mos7840_port->has_led) 786 mos7840_led_activity(port); 787 788 mos7840_port->read_urb_busy = true; 789 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 790 791 if (retval) { 792 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); 793 mos7840_port->read_urb_busy = false; 794 } 795 } 796 797 /***************************************************************************** 798 * mos7840_bulk_out_data_callback 799 * this is the callback function for when we have finished sending 800 * serial data on the bulk out endpoint. 801 *****************************************************************************/ 802 803 static void mos7840_bulk_out_data_callback(struct urb *urb) 804 { 805 struct moschip_port *mos7840_port; 806 struct usb_serial_port *port; 807 int status = urb->status; 808 int i; 809 810 mos7840_port = urb->context; 811 port = mos7840_port->port; 812 spin_lock(&mos7840_port->pool_lock); 813 for (i = 0; i < NUM_URBS; i++) { 814 if (urb == mos7840_port->write_urb_pool[i]) { 815 mos7840_port->busy[i] = 0; 816 break; 817 } 818 } 819 spin_unlock(&mos7840_port->pool_lock); 820 821 if (status) { 822 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status); 823 return; 824 } 825 826 if (mos7840_port_paranoia_check(port, __func__)) 827 return; 828 829 if (mos7840_port->open) 830 tty_port_tty_wakeup(&port->port); 831 832 } 833 834 /************************************************************************/ 835 /* 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 */ 836 /************************************************************************/ 837 838 /***************************************************************************** 839 * mos7840_open 840 * this function is called by the tty driver when a port is opened 841 * If successful, we return 0 842 * Otherwise we return a negative error number. 843 *****************************************************************************/ 844 845 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 846 { 847 int response; 848 int j; 849 struct usb_serial *serial; 850 struct urb *urb; 851 __u16 Data; 852 int status; 853 struct moschip_port *mos7840_port; 854 struct moschip_port *port0; 855 856 if (mos7840_port_paranoia_check(port, __func__)) 857 return -ENODEV; 858 859 serial = port->serial; 860 861 if (mos7840_serial_paranoia_check(serial, __func__)) 862 return -ENODEV; 863 864 mos7840_port = mos7840_get_port_private(port); 865 port0 = mos7840_get_port_private(serial->port[0]); 866 867 if (mos7840_port == NULL || port0 == NULL) 868 return -ENODEV; 869 870 usb_clear_halt(serial->dev, port->write_urb->pipe); 871 usb_clear_halt(serial->dev, port->read_urb->pipe); 872 port0->open_ports++; 873 874 /* Initialising the write urb pool */ 875 for (j = 0; j < NUM_URBS; ++j) { 876 urb = usb_alloc_urb(0, GFP_KERNEL); 877 mos7840_port->write_urb_pool[j] = urb; 878 if (!urb) 879 continue; 880 881 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 882 GFP_KERNEL); 883 if (!urb->transfer_buffer) { 884 usb_free_urb(urb); 885 mos7840_port->write_urb_pool[j] = NULL; 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 port settings */ 1096 /* Must set to enable ints! */ 1097 mos7840_port->shadowMCR = MCR_MASTER_IE; 1098 /* send a open port command */ 1099 mos7840_port->open = 1; 1100 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1101 1102 return 0; 1103 err: 1104 for (j = 0; j < NUM_URBS; ++j) { 1105 urb = mos7840_port->write_urb_pool[j]; 1106 if (!urb) 1107 continue; 1108 kfree(urb->transfer_buffer); 1109 usb_free_urb(urb); 1110 } 1111 return status; 1112 } 1113 1114 /***************************************************************************** 1115 * mos7840_chars_in_buffer 1116 * this function is called by the tty driver when it wants to know how many 1117 * bytes of data we currently have outstanding in the port (data that has 1118 * been written, but hasn't made it out the port yet) 1119 * If successful, we return the number of bytes left to be written in the 1120 * system, 1121 * Otherwise we return zero. 1122 *****************************************************************************/ 1123 1124 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1125 { 1126 struct usb_serial_port *port = tty->driver_data; 1127 int i; 1128 int chars = 0; 1129 unsigned long flags; 1130 struct moschip_port *mos7840_port; 1131 1132 if (mos7840_port_paranoia_check(port, __func__)) 1133 return 0; 1134 1135 mos7840_port = mos7840_get_port_private(port); 1136 if (mos7840_port == NULL) 1137 return 0; 1138 1139 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1140 for (i = 0; i < NUM_URBS; ++i) { 1141 if (mos7840_port->busy[i]) { 1142 struct urb *urb = mos7840_port->write_urb_pool[i]; 1143 chars += urb->transfer_buffer_length; 1144 } 1145 } 1146 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1147 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 1148 return chars; 1149 1150 } 1151 1152 /***************************************************************************** 1153 * mos7840_close 1154 * this function is called by the tty driver when a port is closed 1155 *****************************************************************************/ 1156 1157 static void mos7840_close(struct usb_serial_port *port) 1158 { 1159 struct usb_serial *serial; 1160 struct moschip_port *mos7840_port; 1161 struct moschip_port *port0; 1162 int j; 1163 __u16 Data; 1164 1165 if (mos7840_port_paranoia_check(port, __func__)) 1166 return; 1167 1168 serial = mos7840_get_usb_serial(port, __func__); 1169 if (!serial) 1170 return; 1171 1172 mos7840_port = mos7840_get_port_private(port); 1173 port0 = mos7840_get_port_private(serial->port[0]); 1174 1175 if (mos7840_port == NULL || port0 == NULL) 1176 return; 1177 1178 for (j = 0; j < NUM_URBS; ++j) 1179 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1180 1181 /* Freeing Write URBs */ 1182 for (j = 0; j < NUM_URBS; ++j) { 1183 if (mos7840_port->write_urb_pool[j]) { 1184 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1185 kfree(mos7840_port->write_urb_pool[j]-> 1186 transfer_buffer); 1187 1188 usb_free_urb(mos7840_port->write_urb_pool[j]); 1189 } 1190 } 1191 1192 usb_kill_urb(mos7840_port->write_urb); 1193 usb_kill_urb(mos7840_port->read_urb); 1194 mos7840_port->read_urb_busy = false; 1195 1196 port0->open_ports--; 1197 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports); 1198 if (port0->open_ports == 0) { 1199 if (serial->port[0]->interrupt_in_urb) { 1200 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n"); 1201 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1202 } 1203 } 1204 1205 if (mos7840_port->write_urb) { 1206 /* if this urb had a transfer buffer already (old tx) free it */ 1207 kfree(mos7840_port->write_urb->transfer_buffer); 1208 usb_free_urb(mos7840_port->write_urb); 1209 } 1210 1211 Data = 0x0; 1212 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1213 1214 Data = 0x00; 1215 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1216 1217 mos7840_port->open = 0; 1218 } 1219 1220 /***************************************************************************** 1221 * mos7840_break 1222 * this function sends a break to the port 1223 *****************************************************************************/ 1224 static void mos7840_break(struct tty_struct *tty, int break_state) 1225 { 1226 struct usb_serial_port *port = tty->driver_data; 1227 unsigned char data; 1228 struct usb_serial *serial; 1229 struct moschip_port *mos7840_port; 1230 1231 if (mos7840_port_paranoia_check(port, __func__)) 1232 return; 1233 1234 serial = mos7840_get_usb_serial(port, __func__); 1235 if (!serial) 1236 return; 1237 1238 mos7840_port = mos7840_get_port_private(port); 1239 1240 if (mos7840_port == NULL) 1241 return; 1242 1243 if (break_state == -1) 1244 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1245 else 1246 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1247 1248 /* FIXME: no locking on shadowLCR anywhere in driver */ 1249 mos7840_port->shadowLCR = data; 1250 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1251 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1252 mos7840_port->shadowLCR); 1253 } 1254 1255 /***************************************************************************** 1256 * mos7840_write_room 1257 * this function is called by the tty driver when it wants to know how many 1258 * bytes of data we can accept for a specific port. 1259 * If successful, we return the amount of room that we have for this port 1260 * Otherwise we return a negative error number. 1261 *****************************************************************************/ 1262 1263 static int mos7840_write_room(struct tty_struct *tty) 1264 { 1265 struct usb_serial_port *port = tty->driver_data; 1266 int i; 1267 int room = 0; 1268 unsigned long flags; 1269 struct moschip_port *mos7840_port; 1270 1271 if (mos7840_port_paranoia_check(port, __func__)) 1272 return -1; 1273 1274 mos7840_port = mos7840_get_port_private(port); 1275 if (mos7840_port == NULL) 1276 return -1; 1277 1278 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1279 for (i = 0; i < NUM_URBS; ++i) { 1280 if (!mos7840_port->busy[i]) 1281 room += URB_TRANSFER_BUFFER_SIZE; 1282 } 1283 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1284 1285 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1286 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); 1287 return room; 1288 1289 } 1290 1291 /***************************************************************************** 1292 * mos7840_write 1293 * this function is called by the tty driver when data should be written to 1294 * the port. 1295 * If successful, we return the number of bytes written, otherwise we 1296 * return a negative error number. 1297 *****************************************************************************/ 1298 1299 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1300 const unsigned char *data, int count) 1301 { 1302 int status; 1303 int i; 1304 int bytes_sent = 0; 1305 int transfer_size; 1306 unsigned long flags; 1307 1308 struct moschip_port *mos7840_port; 1309 struct usb_serial *serial; 1310 struct urb *urb; 1311 /* __u16 Data; */ 1312 const unsigned char *current_position = data; 1313 unsigned char *data1; 1314 1315 #ifdef NOTMOS7840 1316 Data = 0x00; 1317 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1318 mos7840_port->shadowLCR = Data; 1319 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data); 1320 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1321 1322 /* Data = 0x03; */ 1323 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1324 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1325 1326 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1327 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1328 1329 /* Data = 0x0c; */ 1330 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1331 Data = 0x00; 1332 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1333 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data); 1334 1335 Data = 0x0; 1336 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1337 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data); 1338 1339 Data = Data & ~SERIAL_LCR_DLAB; 1340 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1341 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1342 #endif 1343 1344 if (mos7840_port_paranoia_check(port, __func__)) 1345 return -1; 1346 1347 serial = port->serial; 1348 if (mos7840_serial_paranoia_check(serial, __func__)) 1349 return -1; 1350 1351 mos7840_port = mos7840_get_port_private(port); 1352 if (mos7840_port == NULL) 1353 return -1; 1354 1355 /* try to find a free urb in the list */ 1356 urb = NULL; 1357 1358 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1359 for (i = 0; i < NUM_URBS; ++i) { 1360 if (!mos7840_port->busy[i]) { 1361 mos7840_port->busy[i] = 1; 1362 urb = mos7840_port->write_urb_pool[i]; 1363 dev_dbg(&port->dev, "URB:%d\n", i); 1364 break; 1365 } 1366 } 1367 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1368 1369 if (urb == NULL) { 1370 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); 1371 goto exit; 1372 } 1373 1374 if (urb->transfer_buffer == NULL) { 1375 urb->transfer_buffer = 1376 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1377 if (!urb->transfer_buffer) 1378 goto exit; 1379 } 1380 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1381 1382 memcpy(urb->transfer_buffer, current_position, transfer_size); 1383 1384 /* fill urb with data and submit */ 1385 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1386 usb_fill_bulk_urb(urb, 1387 serial->dev, 1388 usb_sndbulkpipe(serial->dev, 1389 (port->bulk_out_endpointAddress) + 2), 1390 urb->transfer_buffer, 1391 transfer_size, 1392 mos7840_bulk_out_data_callback, mos7840_port); 1393 } else { 1394 usb_fill_bulk_urb(urb, 1395 serial->dev, 1396 usb_sndbulkpipe(serial->dev, 1397 port->bulk_out_endpointAddress), 1398 urb->transfer_buffer, 1399 transfer_size, 1400 mos7840_bulk_out_data_callback, mos7840_port); 1401 } 1402 1403 data1 = urb->transfer_buffer; 1404 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); 1405 1406 if (mos7840_port->has_led) 1407 mos7840_led_activity(port); 1408 1409 /* send it down the pipe */ 1410 status = usb_submit_urb(urb, GFP_ATOMIC); 1411 1412 if (status) { 1413 mos7840_port->busy[i] = 0; 1414 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 1415 "with status = %d\n", __func__, status); 1416 bytes_sent = status; 1417 goto exit; 1418 } 1419 bytes_sent = transfer_size; 1420 port->icount.tx += transfer_size; 1421 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx); 1422 exit: 1423 return bytes_sent; 1424 1425 } 1426 1427 /***************************************************************************** 1428 * mos7840_throttle 1429 * this function is called by the tty driver when it wants to stop the data 1430 * being read from the port. 1431 *****************************************************************************/ 1432 1433 static void mos7840_throttle(struct tty_struct *tty) 1434 { 1435 struct usb_serial_port *port = tty->driver_data; 1436 struct moschip_port *mos7840_port; 1437 int status; 1438 1439 if (mos7840_port_paranoia_check(port, __func__)) 1440 return; 1441 1442 mos7840_port = mos7840_get_port_private(port); 1443 1444 if (mos7840_port == NULL) 1445 return; 1446 1447 if (!mos7840_port->open) { 1448 dev_dbg(&port->dev, "%s", "port not opened\n"); 1449 return; 1450 } 1451 1452 /* if we are implementing XON/XOFF, send the stop character */ 1453 if (I_IXOFF(tty)) { 1454 unsigned char stop_char = STOP_CHAR(tty); 1455 status = mos7840_write(tty, port, &stop_char, 1); 1456 if (status <= 0) 1457 return; 1458 } 1459 /* if we are implementing RTS/CTS, toggle that line */ 1460 if (tty->termios.c_cflag & CRTSCTS) { 1461 mos7840_port->shadowMCR &= ~MCR_RTS; 1462 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1463 mos7840_port->shadowMCR); 1464 if (status < 0) 1465 return; 1466 } 1467 } 1468 1469 /***************************************************************************** 1470 * mos7840_unthrottle 1471 * this function is called by the tty driver when it wants to resume 1472 * the data being read from the port (called after mos7840_throttle is 1473 * called) 1474 *****************************************************************************/ 1475 static void mos7840_unthrottle(struct tty_struct *tty) 1476 { 1477 struct usb_serial_port *port = tty->driver_data; 1478 int status; 1479 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1480 1481 if (mos7840_port_paranoia_check(port, __func__)) 1482 return; 1483 1484 if (mos7840_port == NULL) 1485 return; 1486 1487 if (!mos7840_port->open) { 1488 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1489 return; 1490 } 1491 1492 /* if we are implementing XON/XOFF, send the start character */ 1493 if (I_IXOFF(tty)) { 1494 unsigned char start_char = START_CHAR(tty); 1495 status = mos7840_write(tty, port, &start_char, 1); 1496 if (status <= 0) 1497 return; 1498 } 1499 1500 /* if we are implementing RTS/CTS, toggle that line */ 1501 if (tty->termios.c_cflag & CRTSCTS) { 1502 mos7840_port->shadowMCR |= MCR_RTS; 1503 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1504 mos7840_port->shadowMCR); 1505 if (status < 0) 1506 return; 1507 } 1508 } 1509 1510 static int mos7840_tiocmget(struct tty_struct *tty) 1511 { 1512 struct usb_serial_port *port = tty->driver_data; 1513 struct moschip_port *mos7840_port; 1514 unsigned int result; 1515 __u16 msr; 1516 __u16 mcr; 1517 int status; 1518 mos7840_port = mos7840_get_port_private(port); 1519 1520 if (mos7840_port == NULL) 1521 return -ENODEV; 1522 1523 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1524 if (status != 1) 1525 return -EIO; 1526 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1527 if (status != 1) 1528 return -EIO; 1529 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1530 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1531 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1532 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1533 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1534 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1535 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1536 1537 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 1538 1539 return result; 1540 } 1541 1542 static int mos7840_tiocmset(struct tty_struct *tty, 1543 unsigned int set, unsigned int clear) 1544 { 1545 struct usb_serial_port *port = tty->driver_data; 1546 struct moschip_port *mos7840_port; 1547 unsigned int mcr; 1548 int status; 1549 1550 mos7840_port = mos7840_get_port_private(port); 1551 1552 if (mos7840_port == NULL) 1553 return -ENODEV; 1554 1555 /* FIXME: What locks the port registers ? */ 1556 mcr = mos7840_port->shadowMCR; 1557 if (clear & TIOCM_RTS) 1558 mcr &= ~MCR_RTS; 1559 if (clear & TIOCM_DTR) 1560 mcr &= ~MCR_DTR; 1561 if (clear & TIOCM_LOOP) 1562 mcr &= ~MCR_LOOPBACK; 1563 1564 if (set & TIOCM_RTS) 1565 mcr |= MCR_RTS; 1566 if (set & TIOCM_DTR) 1567 mcr |= MCR_DTR; 1568 if (set & TIOCM_LOOP) 1569 mcr |= MCR_LOOPBACK; 1570 1571 mos7840_port->shadowMCR = mcr; 1572 1573 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1574 if (status < 0) { 1575 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); 1576 return status; 1577 } 1578 1579 return 0; 1580 } 1581 1582 /***************************************************************************** 1583 * mos7840_calc_baud_rate_divisor 1584 * this function calculates the proper baud rate divisor for the specified 1585 * baud rate. 1586 *****************************************************************************/ 1587 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, 1588 int baudRate, int *divisor, 1589 __u16 *clk_sel_val) 1590 { 1591 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); 1592 1593 if (baudRate <= 115200) { 1594 *divisor = 115200 / baudRate; 1595 *clk_sel_val = 0x0; 1596 } 1597 if ((baudRate > 115200) && (baudRate <= 230400)) { 1598 *divisor = 230400 / baudRate; 1599 *clk_sel_val = 0x10; 1600 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1601 *divisor = 403200 / baudRate; 1602 *clk_sel_val = 0x20; 1603 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1604 *divisor = 460800 / baudRate; 1605 *clk_sel_val = 0x30; 1606 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1607 *divisor = 806400 / baudRate; 1608 *clk_sel_val = 0x40; 1609 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1610 *divisor = 921600 / baudRate; 1611 *clk_sel_val = 0x50; 1612 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1613 *divisor = 1572864 / baudRate; 1614 *clk_sel_val = 0x60; 1615 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1616 *divisor = 3145728 / baudRate; 1617 *clk_sel_val = 0x70; 1618 } 1619 return 0; 1620 1621 #ifdef NOTMCS7840 1622 1623 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1624 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1625 *divisor = mos7840_divisor_table[i].Divisor; 1626 return 0; 1627 } 1628 } 1629 1630 /* After trying for all the standard baud rates * 1631 * Try calculating the divisor for this baud rate */ 1632 1633 if (baudrate > 75 && baudrate < 230400) { 1634 /* get the divisor */ 1635 custom = (__u16) (230400L / baudrate); 1636 1637 /* Check for round off */ 1638 round1 = (__u16) (2304000L / baudrate); 1639 round = (__u16) (round1 - (custom * 10)); 1640 if (round > 4) 1641 custom++; 1642 *divisor = custom; 1643 1644 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom); 1645 return 0; 1646 } 1647 1648 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n"); 1649 return -1; 1650 #endif 1651 } 1652 1653 /***************************************************************************** 1654 * mos7840_send_cmd_write_baud_rate 1655 * this function sends the proper command to change the baud rate of the 1656 * specified port. 1657 *****************************************************************************/ 1658 1659 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1660 int baudRate) 1661 { 1662 int divisor = 0; 1663 int status; 1664 __u16 Data; 1665 unsigned char number; 1666 __u16 clk_sel_val; 1667 struct usb_serial_port *port; 1668 1669 if (mos7840_port == NULL) 1670 return -1; 1671 1672 port = mos7840_port->port; 1673 if (mos7840_port_paranoia_check(port, __func__)) 1674 return -1; 1675 1676 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1677 return -1; 1678 1679 number = mos7840_port->port->port_number; 1680 1681 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate); 1682 /* reset clk_uart_sel in spregOffset */ 1683 if (baudRate > 115200) { 1684 #ifdef HW_flow_control 1685 /* NOTE: need to see the pther register to modify */ 1686 /* setting h/w flow control bit to 1 */ 1687 Data = 0x2b; 1688 mos7840_port->shadowMCR = Data; 1689 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1690 Data); 1691 if (status < 0) { 1692 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1693 return -1; 1694 } 1695 #endif 1696 1697 } else { 1698 #ifdef HW_flow_control 1699 /* setting h/w flow control bit to 0 */ 1700 Data = 0xb; 1701 mos7840_port->shadowMCR = Data; 1702 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1703 Data); 1704 if (status < 0) { 1705 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1706 return -1; 1707 } 1708 #endif 1709 1710 } 1711 1712 if (1) { /* baudRate <= 115200) */ 1713 clk_sel_val = 0x0; 1714 Data = 0x0; 1715 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, 1716 &clk_sel_val); 1717 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1718 &Data); 1719 if (status < 0) { 1720 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); 1721 return -1; 1722 } 1723 Data = (Data & 0x8f) | clk_sel_val; 1724 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1725 Data); 1726 if (status < 0) { 1727 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1728 return -1; 1729 } 1730 /* Calculate the Divisor */ 1731 1732 if (status) { 1733 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1734 return status; 1735 } 1736 /* Enable access to divisor latch */ 1737 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1738 mos7840_port->shadowLCR = Data; 1739 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1740 1741 /* Write the divisor */ 1742 Data = (unsigned char)(divisor & 0xff); 1743 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); 1744 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1745 1746 Data = (unsigned char)((divisor & 0xff00) >> 8); 1747 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); 1748 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1749 1750 /* Disable access to divisor latch */ 1751 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1752 mos7840_port->shadowLCR = Data; 1753 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1754 1755 } 1756 return status; 1757 } 1758 1759 /***************************************************************************** 1760 * mos7840_change_port_settings 1761 * This routine is called to set the UART on the device to match 1762 * the specified new settings. 1763 *****************************************************************************/ 1764 1765 static void mos7840_change_port_settings(struct tty_struct *tty, 1766 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1767 { 1768 int baud; 1769 unsigned cflag; 1770 unsigned iflag; 1771 __u8 lData; 1772 __u8 lParity; 1773 __u8 lStop; 1774 int status; 1775 __u16 Data; 1776 struct usb_serial_port *port; 1777 struct usb_serial *serial; 1778 1779 if (mos7840_port == NULL) 1780 return; 1781 1782 port = mos7840_port->port; 1783 1784 if (mos7840_port_paranoia_check(port, __func__)) 1785 return; 1786 1787 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1788 return; 1789 1790 serial = port->serial; 1791 1792 if (!mos7840_port->open) { 1793 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1794 return; 1795 } 1796 1797 lData = LCR_BITS_8; 1798 lStop = LCR_STOP_1; 1799 lParity = LCR_PAR_NONE; 1800 1801 cflag = tty->termios.c_cflag; 1802 iflag = tty->termios.c_iflag; 1803 1804 /* Change the number of bits */ 1805 switch (cflag & CSIZE) { 1806 case CS5: 1807 lData = LCR_BITS_5; 1808 break; 1809 1810 case CS6: 1811 lData = LCR_BITS_6; 1812 break; 1813 1814 case CS7: 1815 lData = LCR_BITS_7; 1816 break; 1817 1818 default: 1819 case CS8: 1820 lData = LCR_BITS_8; 1821 break; 1822 } 1823 1824 /* Change the Parity bit */ 1825 if (cflag & PARENB) { 1826 if (cflag & PARODD) { 1827 lParity = LCR_PAR_ODD; 1828 dev_dbg(&port->dev, "%s - parity = odd\n", __func__); 1829 } else { 1830 lParity = LCR_PAR_EVEN; 1831 dev_dbg(&port->dev, "%s - parity = even\n", __func__); 1832 } 1833 1834 } else { 1835 dev_dbg(&port->dev, "%s - parity = none\n", __func__); 1836 } 1837 1838 if (cflag & CMSPAR) 1839 lParity = lParity | 0x20; 1840 1841 /* Change the Stop bit */ 1842 if (cflag & CSTOPB) { 1843 lStop = LCR_STOP_2; 1844 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); 1845 } else { 1846 lStop = LCR_STOP_1; 1847 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); 1848 } 1849 1850 /* Update the LCR with the correct value */ 1851 mos7840_port->shadowLCR &= 1852 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1853 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1854 1855 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, 1856 mos7840_port->shadowLCR); 1857 /* Disable Interrupts */ 1858 Data = 0x00; 1859 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1860 1861 Data = 0x00; 1862 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1863 1864 Data = 0xcf; 1865 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1866 1867 /* Send the updated LCR value to the mos7840 */ 1868 Data = mos7840_port->shadowLCR; 1869 1870 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1871 1872 Data = 0x00b; 1873 mos7840_port->shadowMCR = Data; 1874 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1875 Data = 0x00b; 1876 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1877 1878 /* set up the MCR register and send it to the mos7840 */ 1879 1880 mos7840_port->shadowMCR = MCR_MASTER_IE; 1881 if (cflag & CBAUD) 1882 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1883 1884 if (cflag & CRTSCTS) 1885 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1886 else 1887 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 1888 1889 Data = mos7840_port->shadowMCR; 1890 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1891 1892 /* Determine divisor based on baud rate */ 1893 baud = tty_get_baud_rate(tty); 1894 1895 if (!baud) { 1896 /* pick a default, any default... */ 1897 dev_dbg(&port->dev, "%s", "Picked default baud...\n"); 1898 baud = 9600; 1899 } 1900 1901 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); 1902 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 1903 1904 /* Enable Interrupts */ 1905 Data = 0x0c; 1906 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1907 1908 if (mos7840_port->read_urb_busy == false) { 1909 mos7840_port->read_urb_busy = true; 1910 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 1911 if (status) { 1912 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1913 status); 1914 mos7840_port->read_urb_busy = false; 1915 } 1916 } 1917 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, 1918 mos7840_port->shadowLCR); 1919 } 1920 1921 /***************************************************************************** 1922 * mos7840_set_termios 1923 * this function is called by the tty driver when it wants to change 1924 * the termios structure 1925 *****************************************************************************/ 1926 1927 static void mos7840_set_termios(struct tty_struct *tty, 1928 struct usb_serial_port *port, 1929 struct ktermios *old_termios) 1930 { 1931 int status; 1932 unsigned int cflag; 1933 struct usb_serial *serial; 1934 struct moschip_port *mos7840_port; 1935 1936 if (mos7840_port_paranoia_check(port, __func__)) 1937 return; 1938 1939 serial = port->serial; 1940 1941 if (mos7840_serial_paranoia_check(serial, __func__)) 1942 return; 1943 1944 mos7840_port = mos7840_get_port_private(port); 1945 1946 if (mos7840_port == NULL) 1947 return; 1948 1949 if (!mos7840_port->open) { 1950 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1951 return; 1952 } 1953 1954 dev_dbg(&port->dev, "%s", "setting termios - \n"); 1955 1956 cflag = tty->termios.c_cflag; 1957 1958 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, 1959 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); 1960 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, 1961 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 1962 1963 /* change the port settings to the new ones specified */ 1964 1965 mos7840_change_port_settings(tty, mos7840_port, old_termios); 1966 1967 if (!mos7840_port->read_urb) { 1968 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n"); 1969 return; 1970 } 1971 1972 if (mos7840_port->read_urb_busy == false) { 1973 mos7840_port->read_urb_busy = true; 1974 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 1975 if (status) { 1976 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1977 status); 1978 mos7840_port->read_urb_busy = false; 1979 } 1980 } 1981 } 1982 1983 /***************************************************************************** 1984 * mos7840_get_lsr_info - get line status register info 1985 * 1986 * Purpose: Let user call ioctl() to get info when the UART physically 1987 * is emptied. On bus types like RS485, the transmitter must 1988 * release the bus after transmitting. This must be done when 1989 * the transmit shift register is empty, not be done when the 1990 * transmit holding register is empty. This functionality 1991 * allows an RS485 driver to be written in user space. 1992 *****************************************************************************/ 1993 1994 static int mos7840_get_lsr_info(struct tty_struct *tty, 1995 unsigned int __user *value) 1996 { 1997 int count; 1998 unsigned int result = 0; 1999 2000 count = mos7840_chars_in_buffer(tty); 2001 if (count == 0) 2002 result = TIOCSER_TEMT; 2003 2004 if (copy_to_user(value, &result, sizeof(int))) 2005 return -EFAULT; 2006 return 0; 2007 } 2008 2009 /***************************************************************************** 2010 * mos7840_get_serial_info 2011 * function to get information about serial port 2012 *****************************************************************************/ 2013 2014 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2015 struct serial_struct __user *retinfo) 2016 { 2017 struct serial_struct tmp; 2018 2019 if (mos7840_port == NULL) 2020 return -1; 2021 2022 if (!retinfo) 2023 return -EFAULT; 2024 2025 memset(&tmp, 0, sizeof(tmp)); 2026 2027 tmp.type = PORT_16550A; 2028 tmp.line = mos7840_port->port->minor; 2029 tmp.port = mos7840_port->port->port_number; 2030 tmp.irq = 0; 2031 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2032 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2033 tmp.baud_base = 9600; 2034 tmp.close_delay = 5 * HZ; 2035 tmp.closing_wait = 30 * HZ; 2036 2037 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2038 return -EFAULT; 2039 return 0; 2040 } 2041 2042 /***************************************************************************** 2043 * SerialIoctl 2044 * this function handles any ioctl calls to the driver 2045 *****************************************************************************/ 2046 2047 static int mos7840_ioctl(struct tty_struct *tty, 2048 unsigned int cmd, unsigned long arg) 2049 { 2050 struct usb_serial_port *port = tty->driver_data; 2051 void __user *argp = (void __user *)arg; 2052 struct moschip_port *mos7840_port; 2053 2054 if (mos7840_port_paranoia_check(port, __func__)) 2055 return -1; 2056 2057 mos7840_port = mos7840_get_port_private(port); 2058 2059 if (mos7840_port == NULL) 2060 return -1; 2061 2062 switch (cmd) { 2063 /* return number of bytes available */ 2064 2065 case TIOCSERGETLSR: 2066 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 2067 return mos7840_get_lsr_info(tty, argp); 2068 2069 case TIOCGSERIAL: 2070 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); 2071 return mos7840_get_serial_info(mos7840_port, argp); 2072 2073 case TIOCSSERIAL: 2074 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__); 2075 break; 2076 default: 2077 break; 2078 } 2079 return -ENOIOCTLCMD; 2080 } 2081 2082 static int mos7810_check(struct usb_serial *serial) 2083 { 2084 int i, pass_count = 0; 2085 u8 *buf; 2086 __u16 data = 0, mcr_data = 0; 2087 __u16 test_pattern = 0x55AA; 2088 int res; 2089 2090 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2091 if (!buf) 2092 return 0; /* failed to identify 7810 */ 2093 2094 /* Store MCR setting */ 2095 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2096 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, 2097 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2098 if (res == VENDOR_READ_LENGTH) 2099 mcr_data = *buf; 2100 2101 for (i = 0; i < 16; i++) { 2102 /* Send the 1-bit test pattern out to MCS7810 test pin */ 2103 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2104 MCS_WRREQ, MCS_WR_RTYPE, 2105 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), 2106 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); 2107 2108 /* Read the test pattern back */ 2109 res = usb_control_msg(serial->dev, 2110 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, 2111 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2112 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2113 if (res == VENDOR_READ_LENGTH) 2114 data = *buf; 2115 2116 /* If this is a MCS7810 device, both test patterns must match */ 2117 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) 2118 break; 2119 2120 pass_count++; 2121 } 2122 2123 /* Restore MCR setting */ 2124 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, 2125 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 2126 0, MOS_WDR_TIMEOUT); 2127 2128 kfree(buf); 2129 2130 if (pass_count == 16) 2131 return 1; 2132 2133 return 0; 2134 } 2135 2136 static int mos7840_probe(struct usb_serial *serial, 2137 const struct usb_device_id *id) 2138 { 2139 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); 2140 u8 *buf; 2141 int device_type; 2142 2143 if (product == MOSCHIP_DEVICE_ID_7810 || 2144 product == MOSCHIP_DEVICE_ID_7820) { 2145 device_type = product; 2146 goto out; 2147 } 2148 2149 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2150 if (!buf) 2151 return -ENOMEM; 2152 2153 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2154 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2155 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2156 2157 /* For a MCS7840 device GPIO0 must be set to 1 */ 2158 if (buf[0] & 0x01) 2159 device_type = MOSCHIP_DEVICE_ID_7840; 2160 else if (mos7810_check(serial)) 2161 device_type = MOSCHIP_DEVICE_ID_7810; 2162 else 2163 device_type = MOSCHIP_DEVICE_ID_7820; 2164 2165 kfree(buf); 2166 out: 2167 usb_set_serial_data(serial, (void *)(unsigned long)device_type); 2168 2169 return 0; 2170 } 2171 2172 static int mos7840_calc_num_ports(struct usb_serial *serial) 2173 { 2174 int device_type = (unsigned long)usb_get_serial_data(serial); 2175 int mos7840_num_ports; 2176 2177 mos7840_num_ports = (device_type >> 4) & 0x000F; 2178 2179 return mos7840_num_ports; 2180 } 2181 2182 static int mos7840_port_probe(struct usb_serial_port *port) 2183 { 2184 struct usb_serial *serial = port->serial; 2185 int device_type = (unsigned long)usb_get_serial_data(serial); 2186 struct moschip_port *mos7840_port; 2187 int status; 2188 int pnum; 2189 __u16 Data; 2190 2191 /* we set up the pointers to the endpoints in the mos7840_open * 2192 * function, as the structures aren't created yet. */ 2193 2194 pnum = port->port_number; 2195 2196 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); 2197 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2198 if (!mos7840_port) 2199 return -ENOMEM; 2200 2201 /* Initialize all port interrupt end point to port 0 int 2202 * endpoint. Our device has only one interrupt end point 2203 * common to all port */ 2204 2205 mos7840_port->port = port; 2206 mos7840_set_port_private(port, mos7840_port); 2207 spin_lock_init(&mos7840_port->pool_lock); 2208 2209 /* minor is not initialised until later by 2210 * usb-serial.c:get_free_serial() and cannot therefore be used 2211 * to index device instances */ 2212 mos7840_port->port_num = pnum + 1; 2213 dev_dbg(&port->dev, "port->minor = %d\n", port->minor); 2214 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); 2215 2216 if (mos7840_port->port_num == 1) { 2217 mos7840_port->SpRegOffset = 0x0; 2218 mos7840_port->ControlRegOffset = 0x1; 2219 mos7840_port->DcrRegOffset = 0x4; 2220 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) { 2221 mos7840_port->SpRegOffset = 0x8; 2222 mos7840_port->ControlRegOffset = 0x9; 2223 mos7840_port->DcrRegOffset = 0x16; 2224 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) { 2225 mos7840_port->SpRegOffset = 0xa; 2226 mos7840_port->ControlRegOffset = 0xb; 2227 mos7840_port->DcrRegOffset = 0x19; 2228 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) { 2229 mos7840_port->SpRegOffset = 0xa; 2230 mos7840_port->ControlRegOffset = 0xb; 2231 mos7840_port->DcrRegOffset = 0x19; 2232 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) { 2233 mos7840_port->SpRegOffset = 0xc; 2234 mos7840_port->ControlRegOffset = 0xd; 2235 mos7840_port->DcrRegOffset = 0x1c; 2236 } 2237 mos7840_dump_serial_port(port, mos7840_port); 2238 mos7840_set_port_private(port, mos7840_port); 2239 2240 /* enable rx_disable bit in control register */ 2241 status = mos7840_get_reg_sync(port, 2242 mos7840_port->ControlRegOffset, &Data); 2243 if (status < 0) { 2244 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); 2245 goto out; 2246 } else 2247 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); 2248 Data |= 0x08; /* setting driver done bit */ 2249 Data |= 0x04; /* sp1_bit to have cts change reflect in 2250 modem status reg */ 2251 2252 /* Data |= 0x20; //rx_disable bit */ 2253 status = mos7840_set_reg_sync(port, 2254 mos7840_port->ControlRegOffset, Data); 2255 if (status < 0) { 2256 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2257 goto out; 2258 } else 2259 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); 2260 2261 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2262 and 0x24 in DCR3 */ 2263 Data = 0x01; 2264 status = mos7840_set_reg_sync(port, 2265 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2266 if (status < 0) { 2267 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); 2268 goto out; 2269 } else 2270 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); 2271 2272 Data = 0x05; 2273 status = mos7840_set_reg_sync(port, 2274 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2275 if (status < 0) { 2276 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); 2277 goto out; 2278 } else 2279 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); 2280 2281 Data = 0x24; 2282 status = mos7840_set_reg_sync(port, 2283 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2284 if (status < 0) { 2285 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); 2286 goto out; 2287 } else 2288 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); 2289 2290 /* write values in clkstart0x0 and clkmulti 0x20 */ 2291 Data = 0x0; 2292 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); 2293 if (status < 0) { 2294 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2295 goto out; 2296 } else 2297 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2298 2299 Data = 0x20; 2300 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); 2301 if (status < 0) { 2302 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); 2303 goto error; 2304 } else 2305 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); 2306 2307 /* write value 0x0 to scratchpad register */ 2308 Data = 0x00; 2309 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); 2310 if (status < 0) { 2311 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); 2312 goto out; 2313 } else 2314 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); 2315 2316 /* Zero Length flag register */ 2317 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { 2318 Data = 0xff; 2319 status = mos7840_set_reg_sync(port, 2320 (__u16) (ZLP_REG1 + 2321 ((__u16)mos7840_port->port_num)), Data); 2322 dev_dbg(&port->dev, "ZLIP offset %x\n", 2323 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); 2324 if (status < 0) { 2325 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); 2326 goto out; 2327 } else 2328 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); 2329 } else { 2330 Data = 0xff; 2331 status = mos7840_set_reg_sync(port, 2332 (__u16) (ZLP_REG1 + 2333 ((__u16)mos7840_port->port_num) - 0x1), Data); 2334 dev_dbg(&port->dev, "ZLIP offset %x\n", 2335 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); 2336 if (status < 0) { 2337 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); 2338 goto out; 2339 } else 2340 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); 2341 2342 } 2343 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2344 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2345 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2346 GFP_KERNEL); 2347 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2348 !mos7840_port->dr) { 2349 status = -ENOMEM; 2350 goto error; 2351 } 2352 2353 mos7840_port->has_led = false; 2354 2355 /* Initialize LED timers */ 2356 if (device_type == MOSCHIP_DEVICE_ID_7810) { 2357 mos7840_port->has_led = true; 2358 2359 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL); 2360 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr), 2361 GFP_KERNEL); 2362 if (!mos7840_port->led_urb || !mos7840_port->led_dr) { 2363 status = -ENOMEM; 2364 goto error; 2365 } 2366 2367 init_timer(&mos7840_port->led_timer1); 2368 mos7840_port->led_timer1.function = mos7840_led_off; 2369 mos7840_port->led_timer1.expires = 2370 jiffies + msecs_to_jiffies(LED_ON_MS); 2371 mos7840_port->led_timer1.data = (unsigned long)mos7840_port; 2372 2373 init_timer(&mos7840_port->led_timer2); 2374 mos7840_port->led_timer2.function = mos7840_led_flag_off; 2375 mos7840_port->led_timer2.expires = 2376 jiffies + msecs_to_jiffies(LED_OFF_MS); 2377 mos7840_port->led_timer2.data = (unsigned long)mos7840_port; 2378 2379 /* Turn off LED */ 2380 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2381 } 2382 out: 2383 if (pnum == serial->num_ports - 1) { 2384 /* Zero Length flag enable */ 2385 Data = 0x0f; 2386 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2387 if (status < 0) { 2388 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status); 2389 goto error; 2390 } else 2391 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status); 2392 2393 /* setting configuration feature to one */ 2394 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2395 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 2396 MOS_WDR_TIMEOUT); 2397 } 2398 return 0; 2399 error: 2400 kfree(mos7840_port->led_dr); 2401 usb_free_urb(mos7840_port->led_urb); 2402 kfree(mos7840_port->dr); 2403 kfree(mos7840_port->ctrl_buf); 2404 usb_free_urb(mos7840_port->control_urb); 2405 kfree(mos7840_port); 2406 2407 return status; 2408 } 2409 2410 static int mos7840_port_remove(struct usb_serial_port *port) 2411 { 2412 struct moschip_port *mos7840_port; 2413 2414 mos7840_port = mos7840_get_port_private(port); 2415 2416 if (mos7840_port->has_led) { 2417 /* Turn off LED */ 2418 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2419 2420 del_timer_sync(&mos7840_port->led_timer1); 2421 del_timer_sync(&mos7840_port->led_timer2); 2422 2423 usb_kill_urb(mos7840_port->led_urb); 2424 usb_free_urb(mos7840_port->led_urb); 2425 kfree(mos7840_port->led_dr); 2426 } 2427 usb_kill_urb(mos7840_port->control_urb); 2428 usb_free_urb(mos7840_port->control_urb); 2429 kfree(mos7840_port->ctrl_buf); 2430 kfree(mos7840_port->dr); 2431 kfree(mos7840_port); 2432 2433 return 0; 2434 } 2435 2436 static struct usb_serial_driver moschip7840_4port_device = { 2437 .driver = { 2438 .owner = THIS_MODULE, 2439 .name = "mos7840", 2440 }, 2441 .description = DRIVER_DESC, 2442 .id_table = id_table, 2443 .num_ports = 4, 2444 .open = mos7840_open, 2445 .close = mos7840_close, 2446 .write = mos7840_write, 2447 .write_room = mos7840_write_room, 2448 .chars_in_buffer = mos7840_chars_in_buffer, 2449 .throttle = mos7840_throttle, 2450 .unthrottle = mos7840_unthrottle, 2451 .calc_num_ports = mos7840_calc_num_ports, 2452 .probe = mos7840_probe, 2453 .ioctl = mos7840_ioctl, 2454 .set_termios = mos7840_set_termios, 2455 .break_ctl = mos7840_break, 2456 .tiocmget = mos7840_tiocmget, 2457 .tiocmset = mos7840_tiocmset, 2458 .tiocmiwait = usb_serial_generic_tiocmiwait, 2459 .get_icount = usb_serial_generic_get_icount, 2460 .port_probe = mos7840_port_probe, 2461 .port_remove = mos7840_port_remove, 2462 .read_bulk_callback = mos7840_bulk_in_callback, 2463 .read_int_callback = mos7840_interrupt_callback, 2464 }; 2465 2466 static struct usb_serial_driver * const serial_drivers[] = { 2467 &moschip7840_4port_device, NULL 2468 }; 2469 2470 module_usb_serial_driver(serial_drivers, id_table); 2471 2472 MODULE_DESCRIPTION(DRIVER_DESC); 2473 MODULE_LICENSE("GPL"); 2474