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 enum mos7840_flag { 187 MOS7840_FLAG_CTRL_BUSY, 188 MOS7840_FLAG_LED_BUSY, 189 }; 190 191 static const struct usb_device_id id_table[] = { 192 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 193 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 194 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)}, 195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, 196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, 197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, 198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, 199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, 200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, 201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, 202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, 203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, 205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, 207 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, 208 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 209 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 210 {} /* terminating entry */ 211 }; 212 MODULE_DEVICE_TABLE(usb, id_table); 213 214 /* This structure holds all of the local port information */ 215 216 struct moschip_port { 217 int port_num; /*Actual port number in the device(1,2,etc) */ 218 struct urb *write_urb; /* write URB for this port */ 219 struct urb *read_urb; /* read URB for this port */ 220 __u8 shadowLCR; /* last LCR value received */ 221 __u8 shadowMCR; /* last MCR value received */ 222 char open; 223 char open_ports; 224 struct usb_serial_port *port; /* loop back to the owner of this object */ 225 226 /* Offsets */ 227 __u8 SpRegOffset; 228 __u8 ControlRegOffset; 229 __u8 DcrRegOffset; 230 /* for processing control URBS in interrupt context */ 231 struct urb *control_urb; 232 struct usb_ctrlrequest *dr; 233 char *ctrl_buf; 234 int MsrLsr; 235 236 spinlock_t pool_lock; 237 struct urb *write_urb_pool[NUM_URBS]; 238 char busy[NUM_URBS]; 239 bool read_urb_busy; 240 241 /* For device(s) with LED indicator */ 242 bool has_led; 243 struct timer_list led_timer1; /* Timer for LED on */ 244 struct timer_list led_timer2; /* Timer for LED off */ 245 struct urb *led_urb; 246 struct usb_ctrlrequest *led_dr; 247 248 unsigned long flags; 249 }; 250 251 /* 252 * mos7840_set_reg_sync 253 * To set the Control register by calling usb_fill_control_urb function 254 * by passing usb_sndctrlpipe function as parameter. 255 */ 256 257 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 258 __u16 val) 259 { 260 struct usb_device *dev = port->serial->dev; 261 val = val & 0x00ff; 262 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val); 263 264 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 265 MCS_WR_RTYPE, val, reg, NULL, 0, 266 MOS_WDR_TIMEOUT); 267 } 268 269 /* 270 * mos7840_get_reg_sync 271 * To set the Uart register by calling usb_fill_control_urb function by 272 * passing usb_rcvctrlpipe function as parameter. 273 */ 274 275 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 276 __u16 *val) 277 { 278 struct usb_device *dev = port->serial->dev; 279 int ret = 0; 280 u8 *buf; 281 282 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 283 if (!buf) 284 return -ENOMEM; 285 286 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 287 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, 288 MOS_WDR_TIMEOUT); 289 *val = buf[0]; 290 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val); 291 292 kfree(buf); 293 return ret; 294 } 295 296 /* 297 * mos7840_set_uart_reg 298 * To set the Uart register by calling usb_fill_control_urb function by 299 * passing usb_sndctrlpipe function as parameter. 300 */ 301 302 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 303 __u16 val) 304 { 305 306 struct usb_device *dev = port->serial->dev; 307 val = val & 0x00ff; 308 /* For the UART control registers, the application number need 309 to be Or'ed */ 310 if (port->serial->num_ports == 4) { 311 val |= ((__u16)port->port_number + 1) << 8; 312 } else { 313 if (port->port_number == 0) { 314 val |= ((__u16)port->port_number + 1) << 8; 315 } else { 316 val |= ((__u16)port->port_number + 2) << 8; 317 } 318 } 319 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val); 320 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 321 MCS_WR_RTYPE, val, reg, NULL, 0, 322 MOS_WDR_TIMEOUT); 323 324 } 325 326 /* 327 * mos7840_get_uart_reg 328 * To set the Control register by calling usb_fill_control_urb function 329 * by passing usb_rcvctrlpipe function as parameter. 330 */ 331 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 332 __u16 *val) 333 { 334 struct usb_device *dev = port->serial->dev; 335 int ret = 0; 336 __u16 Wval; 337 u8 *buf; 338 339 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 340 if (!buf) 341 return -ENOMEM; 342 343 /* Wval is same as application number */ 344 if (port->serial->num_ports == 4) { 345 Wval = ((__u16)port->port_number + 1) << 8; 346 } else { 347 if (port->port_number == 0) { 348 Wval = ((__u16)port->port_number + 1) << 8; 349 } else { 350 Wval = ((__u16)port->port_number + 2) << 8; 351 } 352 } 353 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval); 354 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 355 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, 356 MOS_WDR_TIMEOUT); 357 *val = buf[0]; 358 359 kfree(buf); 360 return ret; 361 } 362 363 static void mos7840_dump_serial_port(struct usb_serial_port *port, 364 struct moschip_port *mos7840_port) 365 { 366 367 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 368 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset); 369 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset); 370 371 } 372 373 /************************************************************************/ 374 /************************************************************************/ 375 /* I N T E R F A C E F U N C T I O N S */ 376 /* I N T E R F A C E F U N C T I O N S */ 377 /************************************************************************/ 378 /************************************************************************/ 379 380 static inline void mos7840_set_port_private(struct usb_serial_port *port, 381 struct moschip_port *data) 382 { 383 usb_set_serial_port_data(port, (void *)data); 384 } 385 386 static inline struct moschip_port *mos7840_get_port_private(struct 387 usb_serial_port 388 *port) 389 { 390 return (struct moschip_port *)usb_get_serial_port_data(port); 391 } 392 393 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 394 { 395 struct moschip_port *mos7840_port; 396 struct async_icount *icount; 397 mos7840_port = port; 398 if (new_msr & 399 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 400 MOS_MSR_DELTA_CD)) { 401 icount = &mos7840_port->port->icount; 402 403 /* update input line counters */ 404 if (new_msr & MOS_MSR_DELTA_CTS) 405 icount->cts++; 406 if (new_msr & MOS_MSR_DELTA_DSR) 407 icount->dsr++; 408 if (new_msr & MOS_MSR_DELTA_CD) 409 icount->dcd++; 410 if (new_msr & MOS_MSR_DELTA_RI) 411 icount->rng++; 412 413 wake_up_interruptible(&port->port->port.delta_msr_wait); 414 } 415 } 416 417 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 418 { 419 struct async_icount *icount; 420 421 if (new_lsr & SERIAL_LSR_BI) { 422 /* 423 * Parity and Framing errors only count if they 424 * occur exclusive of a break being 425 * received. 426 */ 427 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 428 } 429 430 /* update input line counters */ 431 icount = &port->port->icount; 432 if (new_lsr & SERIAL_LSR_BI) 433 icount->brk++; 434 if (new_lsr & SERIAL_LSR_OE) 435 icount->overrun++; 436 if (new_lsr & SERIAL_LSR_PE) 437 icount->parity++; 438 if (new_lsr & SERIAL_LSR_FE) 439 icount->frame++; 440 } 441 442 /************************************************************************/ 443 /************************************************************************/ 444 /* U S B C A L L B A C K F U N C T I O N S */ 445 /* U S B C A L L B A C K F U N C T I O N S */ 446 /************************************************************************/ 447 /************************************************************************/ 448 449 static void mos7840_control_callback(struct urb *urb) 450 { 451 unsigned char *data; 452 struct moschip_port *mos7840_port; 453 struct device *dev = &urb->dev->dev; 454 __u8 regval = 0x0; 455 int status = urb->status; 456 457 mos7840_port = urb->context; 458 459 switch (status) { 460 case 0: 461 /* success */ 462 break; 463 case -ECONNRESET: 464 case -ENOENT: 465 case -ESHUTDOWN: 466 /* this urb is terminated, clean up */ 467 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); 468 goto out; 469 default: 470 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); 471 goto out; 472 } 473 474 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length); 475 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__, 476 mos7840_port->MsrLsr, mos7840_port->port_num); 477 data = urb->transfer_buffer; 478 regval = (__u8) data[0]; 479 dev_dbg(dev, "%s data is %x\n", __func__, regval); 480 if (mos7840_port->MsrLsr == 0) 481 mos7840_handle_new_msr(mos7840_port, regval); 482 else if (mos7840_port->MsrLsr == 1) 483 mos7840_handle_new_lsr(mos7840_port, regval); 484 out: 485 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags); 486 } 487 488 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 489 __u16 *val) 490 { 491 struct usb_device *dev = mcs->port->serial->dev; 492 struct usb_ctrlrequest *dr = mcs->dr; 493 unsigned char *buffer = mcs->ctrl_buf; 494 int ret; 495 496 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags)) 497 return -EBUSY; 498 499 dr->bRequestType = MCS_RD_RTYPE; 500 dr->bRequest = MCS_RDREQ; 501 dr->wValue = cpu_to_le16(Wval); /* 0 */ 502 dr->wIndex = cpu_to_le16(reg); 503 dr->wLength = cpu_to_le16(2); 504 505 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 506 (unsigned char *)dr, buffer, 2, 507 mos7840_control_callback, mcs); 508 mcs->control_urb->transfer_buffer_length = 2; 509 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 510 if (ret) 511 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags); 512 513 return ret; 514 } 515 516 static void mos7840_set_led_callback(struct urb *urb) 517 { 518 switch (urb->status) { 519 case 0: 520 /* Success */ 521 break; 522 case -ECONNRESET: 523 case -ENOENT: 524 case -ESHUTDOWN: 525 /* This urb is terminated, clean up */ 526 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d", 527 __func__, urb->status); 528 break; 529 default: 530 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d", 531 __func__, urb->status); 532 } 533 } 534 535 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, 536 __u16 reg) 537 { 538 struct usb_device *dev = mcs->port->serial->dev; 539 struct usb_ctrlrequest *dr = mcs->led_dr; 540 541 dr->bRequestType = MCS_WR_RTYPE; 542 dr->bRequest = MCS_WRREQ; 543 dr->wValue = cpu_to_le16(wval); 544 dr->wIndex = cpu_to_le16(reg); 545 dr->wLength = cpu_to_le16(0); 546 547 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0), 548 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL); 549 550 usb_submit_urb(mcs->led_urb, GFP_ATOMIC); 551 } 552 553 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, 554 __u16 val) 555 { 556 struct usb_device *dev = port->serial->dev; 557 558 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, 559 val, reg, NULL, 0, MOS_WDR_TIMEOUT); 560 } 561 562 static void mos7840_led_off(unsigned long arg) 563 { 564 struct moschip_port *mcs = (struct moschip_port *) arg; 565 566 /* Turn off LED */ 567 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER); 568 mod_timer(&mcs->led_timer2, 569 jiffies + msecs_to_jiffies(LED_OFF_MS)); 570 } 571 572 static void mos7840_led_flag_off(unsigned long arg) 573 { 574 struct moschip_port *mcs = (struct moschip_port *) arg; 575 576 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags); 577 } 578 579 static void mos7840_led_activity(struct usb_serial_port *port) 580 { 581 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 582 583 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags)) 584 return; 585 586 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER); 587 mod_timer(&mos7840_port->led_timer1, 588 jiffies + msecs_to_jiffies(LED_ON_MS)); 589 } 590 591 /***************************************************************************** 592 * mos7840_interrupt_callback 593 * this is the callback function for when we have received data on the 594 * interrupt endpoint. 595 *****************************************************************************/ 596 597 static void mos7840_interrupt_callback(struct urb *urb) 598 { 599 int result; 600 int length; 601 struct moschip_port *mos7840_port; 602 struct usb_serial *serial; 603 __u16 Data; 604 unsigned char *data; 605 __u8 sp[5], st; 606 int i, rv = 0; 607 __u16 wval, wreg = 0; 608 int status = urb->status; 609 610 switch (status) { 611 case 0: 612 /* success */ 613 break; 614 case -ECONNRESET: 615 case -ENOENT: 616 case -ESHUTDOWN: 617 /* this urb is terminated, clean up */ 618 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 619 __func__, status); 620 return; 621 default: 622 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", 623 __func__, status); 624 goto exit; 625 } 626 627 length = urb->actual_length; 628 data = urb->transfer_buffer; 629 630 serial = urb->context; 631 632 /* Moschip get 5 bytes 633 * Byte 1 IIR Port 1 (port.number is 0) 634 * Byte 2 IIR Port 2 (port.number is 1) 635 * Byte 3 IIR Port 3 (port.number is 2) 636 * Byte 4 IIR Port 4 (port.number is 3) 637 * Byte 5 FIFO status for both */ 638 639 if (length && length > 5) { 640 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n"); 641 return; 642 } 643 644 sp[0] = (__u8) data[0]; 645 sp[1] = (__u8) data[1]; 646 sp[2] = (__u8) data[2]; 647 sp[3] = (__u8) data[3]; 648 st = (__u8) data[4]; 649 650 for (i = 0; i < serial->num_ports; i++) { 651 mos7840_port = mos7840_get_port_private(serial->port[i]); 652 wval = ((__u16)serial->port[i]->port_number + 1) << 8; 653 if (mos7840_port->open) { 654 if (sp[i] & 0x01) { 655 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i); 656 } else { 657 switch (sp[i] & 0x0f) { 658 case SERIAL_IIR_RLS: 659 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i); 660 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n"); 661 mos7840_port->MsrLsr = 1; 662 wreg = LINE_STATUS_REGISTER; 663 break; 664 case SERIAL_IIR_MS: 665 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i); 666 mos7840_port->MsrLsr = 0; 667 wreg = MODEM_STATUS_REGISTER; 668 break; 669 } 670 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 671 } 672 } 673 } 674 if (!(rv < 0)) 675 /* the completion handler for the control urb will resubmit */ 676 return; 677 exit: 678 result = usb_submit_urb(urb, GFP_ATOMIC); 679 if (result) { 680 dev_err(&urb->dev->dev, 681 "%s - Error %d submitting interrupt urb\n", 682 __func__, result); 683 } 684 } 685 686 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 687 const char *function) 688 { 689 if (!port) { 690 pr_debug("%s - port == NULL\n", function); 691 return -1; 692 } 693 if (!port->serial) { 694 pr_debug("%s - port->serial == NULL\n", function); 695 return -1; 696 } 697 698 return 0; 699 } 700 701 /* Inline functions to check the sanity of a pointer that is passed to us */ 702 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 703 const char *function) 704 { 705 if (!serial) { 706 pr_debug("%s - serial == NULL\n", function); 707 return -1; 708 } 709 if (!serial->type) { 710 pr_debug("%s - serial->type == NULL!\n", function); 711 return -1; 712 } 713 714 return 0; 715 } 716 717 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 718 const char *function) 719 { 720 /* if no port was specified, or it fails a paranoia check */ 721 if (!port || 722 mos7840_port_paranoia_check(port, function) || 723 mos7840_serial_paranoia_check(port->serial, function)) { 724 /* then say that we don't have a valid usb_serial thing, 725 * which will end up genrating -ENODEV return values */ 726 return NULL; 727 } 728 729 return port->serial; 730 } 731 732 /***************************************************************************** 733 * mos7840_bulk_in_callback 734 * this is the callback function for when we have received data on the 735 * bulk in endpoint. 736 *****************************************************************************/ 737 738 static void mos7840_bulk_in_callback(struct urb *urb) 739 { 740 int retval; 741 unsigned char *data; 742 struct usb_serial *serial; 743 struct usb_serial_port *port; 744 struct moschip_port *mos7840_port; 745 int status = urb->status; 746 747 mos7840_port = urb->context; 748 if (!mos7840_port) 749 return; 750 751 if (status) { 752 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); 753 mos7840_port->read_urb_busy = false; 754 return; 755 } 756 757 port = mos7840_port->port; 758 if (mos7840_port_paranoia_check(port, __func__)) { 759 mos7840_port->read_urb_busy = false; 760 return; 761 } 762 763 serial = mos7840_get_usb_serial(port, __func__); 764 if (!serial) { 765 mos7840_port->read_urb_busy = false; 766 return; 767 } 768 769 data = urb->transfer_buffer; 770 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); 771 772 if (urb->actual_length) { 773 struct tty_port *tport = &mos7840_port->port->port; 774 tty_insert_flip_string(tport, data, urb->actual_length); 775 tty_flip_buffer_push(tport); 776 port->icount.rx += urb->actual_length; 777 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx); 778 } 779 780 if (!mos7840_port->read_urb) { 781 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n"); 782 mos7840_port->read_urb_busy = false; 783 return; 784 } 785 786 if (mos7840_port->has_led) 787 mos7840_led_activity(port); 788 789 mos7840_port->read_urb_busy = true; 790 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 791 792 if (retval) { 793 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); 794 mos7840_port->read_urb_busy = false; 795 } 796 } 797 798 /***************************************************************************** 799 * mos7840_bulk_out_data_callback 800 * this is the callback function for when we have finished sending 801 * serial data on the bulk out endpoint. 802 *****************************************************************************/ 803 804 static void mos7840_bulk_out_data_callback(struct urb *urb) 805 { 806 struct moschip_port *mos7840_port; 807 struct usb_serial_port *port; 808 int status = urb->status; 809 int i; 810 811 mos7840_port = urb->context; 812 port = mos7840_port->port; 813 spin_lock(&mos7840_port->pool_lock); 814 for (i = 0; i < NUM_URBS; i++) { 815 if (urb == mos7840_port->write_urb_pool[i]) { 816 mos7840_port->busy[i] = 0; 817 break; 818 } 819 } 820 spin_unlock(&mos7840_port->pool_lock); 821 822 if (status) { 823 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status); 824 return; 825 } 826 827 if (mos7840_port_paranoia_check(port, __func__)) 828 return; 829 830 if (mos7840_port->open) 831 tty_port_tty_wakeup(&port->port); 832 833 } 834 835 /************************************************************************/ 836 /* 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 */ 837 /************************************************************************/ 838 839 /***************************************************************************** 840 * mos7840_open 841 * this function is called by the tty driver when a port is opened 842 * If successful, we return 0 843 * Otherwise we return a negative error number. 844 *****************************************************************************/ 845 846 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 847 { 848 int response; 849 int j; 850 struct usb_serial *serial; 851 struct urb *urb; 852 __u16 Data; 853 int status; 854 struct moschip_port *mos7840_port; 855 struct moschip_port *port0; 856 857 if (mos7840_port_paranoia_check(port, __func__)) 858 return -ENODEV; 859 860 serial = port->serial; 861 862 if (mos7840_serial_paranoia_check(serial, __func__)) 863 return -ENODEV; 864 865 mos7840_port = mos7840_get_port_private(port); 866 port0 = mos7840_get_port_private(serial->port[0]); 867 868 if (mos7840_port == NULL || port0 == NULL) 869 return -ENODEV; 870 871 usb_clear_halt(serial->dev, port->write_urb->pipe); 872 usb_clear_halt(serial->dev, port->read_urb->pipe); 873 port0->open_ports++; 874 875 /* Initialising the write urb pool */ 876 for (j = 0; j < NUM_URBS; ++j) { 877 urb = usb_alloc_urb(0, GFP_KERNEL); 878 mos7840_port->write_urb_pool[j] = urb; 879 if (!urb) 880 continue; 881 882 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 883 GFP_KERNEL); 884 if (!urb->transfer_buffer) { 885 usb_free_urb(urb); 886 mos7840_port->write_urb_pool[j] = NULL; 887 continue; 888 } 889 } 890 891 /***************************************************************************** 892 * Initialize MCS7840 -- Write Init values to corresponding Registers 893 * 894 * Register Index 895 * 1 : IER 896 * 2 : FCR 897 * 3 : LCR 898 * 4 : MCR 899 * 900 * 0x08 : SP1/2 Control Reg 901 *****************************************************************************/ 902 903 /* NEED to check the following Block */ 904 905 Data = 0x0; 906 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 907 if (status < 0) { 908 dev_dbg(&port->dev, "Reading Spreg failed\n"); 909 goto err; 910 } 911 Data |= 0x80; 912 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 913 if (status < 0) { 914 dev_dbg(&port->dev, "writing Spreg failed\n"); 915 goto err; 916 } 917 918 Data &= ~0x80; 919 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 920 if (status < 0) { 921 dev_dbg(&port->dev, "writing Spreg failed\n"); 922 goto err; 923 } 924 /* End of block to be checked */ 925 926 Data = 0x0; 927 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 928 &Data); 929 if (status < 0) { 930 dev_dbg(&port->dev, "Reading Controlreg failed\n"); 931 goto err; 932 } 933 Data |= 0x08; /* Driver done bit */ 934 Data |= 0x20; /* rx_disable */ 935 status = mos7840_set_reg_sync(port, 936 mos7840_port->ControlRegOffset, Data); 937 if (status < 0) { 938 dev_dbg(&port->dev, "writing Controlreg failed\n"); 939 goto err; 940 } 941 /* do register settings here */ 942 /* Set all regs to the device default values. */ 943 /*********************************** 944 * First Disable all interrupts. 945 ***********************************/ 946 Data = 0x00; 947 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 948 if (status < 0) { 949 dev_dbg(&port->dev, "disabling interrupts failed\n"); 950 goto err; 951 } 952 /* Set FIFO_CONTROL_REGISTER to the default value */ 953 Data = 0x00; 954 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 955 if (status < 0) { 956 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 957 goto err; 958 } 959 960 Data = 0xcf; 961 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 962 if (status < 0) { 963 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 964 goto err; 965 } 966 967 Data = 0x03; 968 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 969 mos7840_port->shadowLCR = Data; 970 971 Data = 0x0b; 972 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 973 mos7840_port->shadowMCR = Data; 974 975 Data = 0x00; 976 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 977 mos7840_port->shadowLCR = Data; 978 979 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 980 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 981 982 Data = 0x0c; 983 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 984 985 Data = 0x0; 986 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 987 988 Data = 0x00; 989 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 990 991 Data = Data & ~SERIAL_LCR_DLAB; 992 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 993 mos7840_port->shadowLCR = Data; 994 995 /* clearing Bulkin and Bulkout Fifo */ 996 Data = 0x0; 997 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 998 999 Data = Data | 0x0c; 1000 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1001 1002 Data = Data & ~0x0c; 1003 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1004 /* Finally enable all interrupts */ 1005 Data = 0x0c; 1006 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1007 1008 /* clearing rx_disable */ 1009 Data = 0x0; 1010 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1011 &Data); 1012 Data = Data & ~0x20; 1013 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1014 Data); 1015 1016 /* rx_negate */ 1017 Data = 0x0; 1018 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1019 &Data); 1020 Data = Data | 0x10; 1021 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1022 Data); 1023 1024 /* Check to see if we've set up our endpoint info yet * 1025 * (can't set it up in mos7840_startup as the structures * 1026 * were not set up at that time.) */ 1027 if (port0->open_ports == 1) { 1028 if (serial->port[0]->interrupt_in_buffer == NULL) { 1029 /* set up interrupt urb */ 1030 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1031 serial->dev, 1032 usb_rcvintpipe(serial->dev, 1033 serial->port[0]->interrupt_in_endpointAddress), 1034 serial->port[0]->interrupt_in_buffer, 1035 serial->port[0]->interrupt_in_urb-> 1036 transfer_buffer_length, 1037 mos7840_interrupt_callback, 1038 serial, 1039 serial->port[0]->interrupt_in_urb->interval); 1040 1041 /* start interrupt read for mos7840 * 1042 * will continue as long as mos7840 is connected */ 1043 1044 response = 1045 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1046 GFP_KERNEL); 1047 if (response) { 1048 dev_err(&port->dev, "%s - Error %d submitting " 1049 "interrupt urb\n", __func__, response); 1050 } 1051 1052 } 1053 1054 } 1055 1056 /* see if we've set up our endpoint info yet * 1057 * (can't set it up in mos7840_startup as the * 1058 * structures were not set up at that time.) */ 1059 1060 dev_dbg(&port->dev, "port number is %d\n", port->port_number); 1061 dev_dbg(&port->dev, "minor number is %d\n", port->minor); 1062 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress); 1063 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress); 1064 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress); 1065 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num); 1066 mos7840_port->read_urb = port->read_urb; 1067 1068 /* set up our bulk in urb */ 1069 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1070 usb_fill_bulk_urb(mos7840_port->read_urb, 1071 serial->dev, 1072 usb_rcvbulkpipe(serial->dev, 1073 (port->bulk_in_endpointAddress) + 2), 1074 port->bulk_in_buffer, 1075 mos7840_port->read_urb->transfer_buffer_length, 1076 mos7840_bulk_in_callback, mos7840_port); 1077 } else { 1078 usb_fill_bulk_urb(mos7840_port->read_urb, 1079 serial->dev, 1080 usb_rcvbulkpipe(serial->dev, 1081 port->bulk_in_endpointAddress), 1082 port->bulk_in_buffer, 1083 mos7840_port->read_urb->transfer_buffer_length, 1084 mos7840_bulk_in_callback, mos7840_port); 1085 } 1086 1087 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress); 1088 mos7840_port->read_urb_busy = true; 1089 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1090 if (response) { 1091 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1092 __func__, response); 1093 mos7840_port->read_urb_busy = false; 1094 } 1095 1096 /* initialize our port settings */ 1097 /* Must set to enable ints! */ 1098 mos7840_port->shadowMCR = MCR_MASTER_IE; 1099 /* send a open port command */ 1100 mos7840_port->open = 1; 1101 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1102 1103 return 0; 1104 err: 1105 for (j = 0; j < NUM_URBS; ++j) { 1106 urb = mos7840_port->write_urb_pool[j]; 1107 if (!urb) 1108 continue; 1109 kfree(urb->transfer_buffer); 1110 usb_free_urb(urb); 1111 } 1112 return status; 1113 } 1114 1115 /***************************************************************************** 1116 * mos7840_chars_in_buffer 1117 * this function is called by the tty driver when it wants to know how many 1118 * bytes of data we currently have outstanding in the port (data that has 1119 * been written, but hasn't made it out the port yet) 1120 * If successful, we return the number of bytes left to be written in the 1121 * system, 1122 * Otherwise we return zero. 1123 *****************************************************************************/ 1124 1125 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1126 { 1127 struct usb_serial_port *port = tty->driver_data; 1128 int i; 1129 int chars = 0; 1130 unsigned long flags; 1131 struct moschip_port *mos7840_port; 1132 1133 if (mos7840_port_paranoia_check(port, __func__)) 1134 return 0; 1135 1136 mos7840_port = mos7840_get_port_private(port); 1137 if (mos7840_port == NULL) 1138 return 0; 1139 1140 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1141 for (i = 0; i < NUM_URBS; ++i) { 1142 if (mos7840_port->busy[i]) { 1143 struct urb *urb = mos7840_port->write_urb_pool[i]; 1144 chars += urb->transfer_buffer_length; 1145 } 1146 } 1147 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1148 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 1149 return chars; 1150 1151 } 1152 1153 /***************************************************************************** 1154 * mos7840_close 1155 * this function is called by the tty driver when a port is closed 1156 *****************************************************************************/ 1157 1158 static void mos7840_close(struct usb_serial_port *port) 1159 { 1160 struct usb_serial *serial; 1161 struct moschip_port *mos7840_port; 1162 struct moschip_port *port0; 1163 int j; 1164 __u16 Data; 1165 1166 if (mos7840_port_paranoia_check(port, __func__)) 1167 return; 1168 1169 serial = mos7840_get_usb_serial(port, __func__); 1170 if (!serial) 1171 return; 1172 1173 mos7840_port = mos7840_get_port_private(port); 1174 port0 = mos7840_get_port_private(serial->port[0]); 1175 1176 if (mos7840_port == NULL || port0 == NULL) 1177 return; 1178 1179 for (j = 0; j < NUM_URBS; ++j) 1180 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1181 1182 /* Freeing Write URBs */ 1183 for (j = 0; j < NUM_URBS; ++j) { 1184 if (mos7840_port->write_urb_pool[j]) { 1185 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1186 kfree(mos7840_port->write_urb_pool[j]-> 1187 transfer_buffer); 1188 1189 usb_free_urb(mos7840_port->write_urb_pool[j]); 1190 } 1191 } 1192 1193 usb_kill_urb(mos7840_port->write_urb); 1194 usb_kill_urb(mos7840_port->read_urb); 1195 mos7840_port->read_urb_busy = false; 1196 1197 port0->open_ports--; 1198 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports); 1199 if (port0->open_ports == 0) { 1200 if (serial->port[0]->interrupt_in_urb) { 1201 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n"); 1202 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1203 } 1204 } 1205 1206 if (mos7840_port->write_urb) { 1207 /* if this urb had a transfer buffer already (old tx) free it */ 1208 kfree(mos7840_port->write_urb->transfer_buffer); 1209 usb_free_urb(mos7840_port->write_urb); 1210 } 1211 1212 Data = 0x0; 1213 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1214 1215 Data = 0x00; 1216 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1217 1218 mos7840_port->open = 0; 1219 } 1220 1221 /***************************************************************************** 1222 * mos7840_break 1223 * this function sends a break to the port 1224 *****************************************************************************/ 1225 static void mos7840_break(struct tty_struct *tty, int break_state) 1226 { 1227 struct usb_serial_port *port = tty->driver_data; 1228 unsigned char data; 1229 struct usb_serial *serial; 1230 struct moschip_port *mos7840_port; 1231 1232 if (mos7840_port_paranoia_check(port, __func__)) 1233 return; 1234 1235 serial = mos7840_get_usb_serial(port, __func__); 1236 if (!serial) 1237 return; 1238 1239 mos7840_port = mos7840_get_port_private(port); 1240 1241 if (mos7840_port == NULL) 1242 return; 1243 1244 if (break_state == -1) 1245 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1246 else 1247 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1248 1249 /* FIXME: no locking on shadowLCR anywhere in driver */ 1250 mos7840_port->shadowLCR = data; 1251 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1252 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1253 mos7840_port->shadowLCR); 1254 } 1255 1256 /***************************************************************************** 1257 * mos7840_write_room 1258 * this function is called by the tty driver when it wants to know how many 1259 * bytes of data we can accept for a specific port. 1260 * If successful, we return the amount of room that we have for this port 1261 * Otherwise we return a negative error number. 1262 *****************************************************************************/ 1263 1264 static int mos7840_write_room(struct tty_struct *tty) 1265 { 1266 struct usb_serial_port *port = tty->driver_data; 1267 int i; 1268 int room = 0; 1269 unsigned long flags; 1270 struct moschip_port *mos7840_port; 1271 1272 if (mos7840_port_paranoia_check(port, __func__)) 1273 return -1; 1274 1275 mos7840_port = mos7840_get_port_private(port); 1276 if (mos7840_port == NULL) 1277 return -1; 1278 1279 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1280 for (i = 0; i < NUM_URBS; ++i) { 1281 if (!mos7840_port->busy[i]) 1282 room += URB_TRANSFER_BUFFER_SIZE; 1283 } 1284 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1285 1286 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1287 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); 1288 return room; 1289 1290 } 1291 1292 /***************************************************************************** 1293 * mos7840_write 1294 * this function is called by the tty driver when data should be written to 1295 * the port. 1296 * If successful, we return the number of bytes written, otherwise we 1297 * return a negative error number. 1298 *****************************************************************************/ 1299 1300 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1301 const unsigned char *data, int count) 1302 { 1303 int status; 1304 int i; 1305 int bytes_sent = 0; 1306 int transfer_size; 1307 unsigned long flags; 1308 1309 struct moschip_port *mos7840_port; 1310 struct usb_serial *serial; 1311 struct urb *urb; 1312 /* __u16 Data; */ 1313 const unsigned char *current_position = data; 1314 unsigned char *data1; 1315 1316 #ifdef NOTMOS7840 1317 Data = 0x00; 1318 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1319 mos7840_port->shadowLCR = Data; 1320 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data); 1321 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1322 1323 /* Data = 0x03; */ 1324 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1325 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1326 1327 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1328 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1329 1330 /* Data = 0x0c; */ 1331 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1332 Data = 0x00; 1333 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1334 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data); 1335 1336 Data = 0x0; 1337 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1338 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data); 1339 1340 Data = Data & ~SERIAL_LCR_DLAB; 1341 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1342 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1343 #endif 1344 1345 if (mos7840_port_paranoia_check(port, __func__)) 1346 return -1; 1347 1348 serial = port->serial; 1349 if (mos7840_serial_paranoia_check(serial, __func__)) 1350 return -1; 1351 1352 mos7840_port = mos7840_get_port_private(port); 1353 if (mos7840_port == NULL) 1354 return -1; 1355 1356 /* try to find a free urb in the list */ 1357 urb = NULL; 1358 1359 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1360 for (i = 0; i < NUM_URBS; ++i) { 1361 if (!mos7840_port->busy[i]) { 1362 mos7840_port->busy[i] = 1; 1363 urb = mos7840_port->write_urb_pool[i]; 1364 dev_dbg(&port->dev, "URB:%d\n", i); 1365 break; 1366 } 1367 } 1368 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1369 1370 if (urb == NULL) { 1371 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); 1372 goto exit; 1373 } 1374 1375 if (urb->transfer_buffer == NULL) { 1376 urb->transfer_buffer = 1377 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1378 if (!urb->transfer_buffer) 1379 goto exit; 1380 } 1381 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1382 1383 memcpy(urb->transfer_buffer, current_position, transfer_size); 1384 1385 /* fill urb with data and submit */ 1386 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1387 usb_fill_bulk_urb(urb, 1388 serial->dev, 1389 usb_sndbulkpipe(serial->dev, 1390 (port->bulk_out_endpointAddress) + 2), 1391 urb->transfer_buffer, 1392 transfer_size, 1393 mos7840_bulk_out_data_callback, mos7840_port); 1394 } else { 1395 usb_fill_bulk_urb(urb, 1396 serial->dev, 1397 usb_sndbulkpipe(serial->dev, 1398 port->bulk_out_endpointAddress), 1399 urb->transfer_buffer, 1400 transfer_size, 1401 mos7840_bulk_out_data_callback, mos7840_port); 1402 } 1403 1404 data1 = urb->transfer_buffer; 1405 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); 1406 1407 if (mos7840_port->has_led) 1408 mos7840_led_activity(port); 1409 1410 /* send it down the pipe */ 1411 status = usb_submit_urb(urb, GFP_ATOMIC); 1412 1413 if (status) { 1414 mos7840_port->busy[i] = 0; 1415 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 1416 "with status = %d\n", __func__, status); 1417 bytes_sent = status; 1418 goto exit; 1419 } 1420 bytes_sent = transfer_size; 1421 port->icount.tx += transfer_size; 1422 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx); 1423 exit: 1424 return bytes_sent; 1425 1426 } 1427 1428 /***************************************************************************** 1429 * mos7840_throttle 1430 * this function is called by the tty driver when it wants to stop the data 1431 * being read from the port. 1432 *****************************************************************************/ 1433 1434 static void mos7840_throttle(struct tty_struct *tty) 1435 { 1436 struct usb_serial_port *port = tty->driver_data; 1437 struct moschip_port *mos7840_port; 1438 int status; 1439 1440 if (mos7840_port_paranoia_check(port, __func__)) 1441 return; 1442 1443 mos7840_port = mos7840_get_port_private(port); 1444 1445 if (mos7840_port == NULL) 1446 return; 1447 1448 if (!mos7840_port->open) { 1449 dev_dbg(&port->dev, "%s", "port not opened\n"); 1450 return; 1451 } 1452 1453 /* if we are implementing XON/XOFF, send the stop character */ 1454 if (I_IXOFF(tty)) { 1455 unsigned char stop_char = STOP_CHAR(tty); 1456 status = mos7840_write(tty, port, &stop_char, 1); 1457 if (status <= 0) 1458 return; 1459 } 1460 /* if we are implementing RTS/CTS, toggle that line */ 1461 if (tty->termios.c_cflag & CRTSCTS) { 1462 mos7840_port->shadowMCR &= ~MCR_RTS; 1463 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1464 mos7840_port->shadowMCR); 1465 if (status < 0) 1466 return; 1467 } 1468 } 1469 1470 /***************************************************************************** 1471 * mos7840_unthrottle 1472 * this function is called by the tty driver when it wants to resume 1473 * the data being read from the port (called after mos7840_throttle is 1474 * called) 1475 *****************************************************************************/ 1476 static void mos7840_unthrottle(struct tty_struct *tty) 1477 { 1478 struct usb_serial_port *port = tty->driver_data; 1479 int status; 1480 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1481 1482 if (mos7840_port_paranoia_check(port, __func__)) 1483 return; 1484 1485 if (mos7840_port == NULL) 1486 return; 1487 1488 if (!mos7840_port->open) { 1489 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1490 return; 1491 } 1492 1493 /* if we are implementing XON/XOFF, send the start character */ 1494 if (I_IXOFF(tty)) { 1495 unsigned char start_char = START_CHAR(tty); 1496 status = mos7840_write(tty, port, &start_char, 1); 1497 if (status <= 0) 1498 return; 1499 } 1500 1501 /* if we are implementing RTS/CTS, toggle that line */ 1502 if (tty->termios.c_cflag & CRTSCTS) { 1503 mos7840_port->shadowMCR |= MCR_RTS; 1504 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1505 mos7840_port->shadowMCR); 1506 if (status < 0) 1507 return; 1508 } 1509 } 1510 1511 static int mos7840_tiocmget(struct tty_struct *tty) 1512 { 1513 struct usb_serial_port *port = tty->driver_data; 1514 struct moschip_port *mos7840_port; 1515 unsigned int result; 1516 __u16 msr; 1517 __u16 mcr; 1518 int status; 1519 mos7840_port = mos7840_get_port_private(port); 1520 1521 if (mos7840_port == NULL) 1522 return -ENODEV; 1523 1524 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1525 if (status != 1) 1526 return -EIO; 1527 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1528 if (status != 1) 1529 return -EIO; 1530 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1531 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1532 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1533 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1534 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1535 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1536 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1537 1538 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 1539 1540 return result; 1541 } 1542 1543 static int mos7840_tiocmset(struct tty_struct *tty, 1544 unsigned int set, unsigned int clear) 1545 { 1546 struct usb_serial_port *port = tty->driver_data; 1547 struct moschip_port *mos7840_port; 1548 unsigned int mcr; 1549 int status; 1550 1551 mos7840_port = mos7840_get_port_private(port); 1552 1553 if (mos7840_port == NULL) 1554 return -ENODEV; 1555 1556 /* FIXME: What locks the port registers ? */ 1557 mcr = mos7840_port->shadowMCR; 1558 if (clear & TIOCM_RTS) 1559 mcr &= ~MCR_RTS; 1560 if (clear & TIOCM_DTR) 1561 mcr &= ~MCR_DTR; 1562 if (clear & TIOCM_LOOP) 1563 mcr &= ~MCR_LOOPBACK; 1564 1565 if (set & TIOCM_RTS) 1566 mcr |= MCR_RTS; 1567 if (set & TIOCM_DTR) 1568 mcr |= MCR_DTR; 1569 if (set & TIOCM_LOOP) 1570 mcr |= MCR_LOOPBACK; 1571 1572 mos7840_port->shadowMCR = mcr; 1573 1574 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1575 if (status < 0) { 1576 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); 1577 return status; 1578 } 1579 1580 return 0; 1581 } 1582 1583 /***************************************************************************** 1584 * mos7840_calc_baud_rate_divisor 1585 * this function calculates the proper baud rate divisor for the specified 1586 * baud rate. 1587 *****************************************************************************/ 1588 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, 1589 int baudRate, int *divisor, 1590 __u16 *clk_sel_val) 1591 { 1592 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); 1593 1594 if (baudRate <= 115200) { 1595 *divisor = 115200 / baudRate; 1596 *clk_sel_val = 0x0; 1597 } 1598 if ((baudRate > 115200) && (baudRate <= 230400)) { 1599 *divisor = 230400 / baudRate; 1600 *clk_sel_val = 0x10; 1601 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1602 *divisor = 403200 / baudRate; 1603 *clk_sel_val = 0x20; 1604 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1605 *divisor = 460800 / baudRate; 1606 *clk_sel_val = 0x30; 1607 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1608 *divisor = 806400 / baudRate; 1609 *clk_sel_val = 0x40; 1610 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1611 *divisor = 921600 / baudRate; 1612 *clk_sel_val = 0x50; 1613 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1614 *divisor = 1572864 / baudRate; 1615 *clk_sel_val = 0x60; 1616 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1617 *divisor = 3145728 / baudRate; 1618 *clk_sel_val = 0x70; 1619 } 1620 return 0; 1621 1622 #ifdef NOTMCS7840 1623 1624 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1625 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1626 *divisor = mos7840_divisor_table[i].Divisor; 1627 return 0; 1628 } 1629 } 1630 1631 /* After trying for all the standard baud rates * 1632 * Try calculating the divisor for this baud rate */ 1633 1634 if (baudrate > 75 && baudrate < 230400) { 1635 /* get the divisor */ 1636 custom = (__u16) (230400L / baudrate); 1637 1638 /* Check for round off */ 1639 round1 = (__u16) (2304000L / baudrate); 1640 round = (__u16) (round1 - (custom * 10)); 1641 if (round > 4) 1642 custom++; 1643 *divisor = custom; 1644 1645 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom); 1646 return 0; 1647 } 1648 1649 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n"); 1650 return -1; 1651 #endif 1652 } 1653 1654 /***************************************************************************** 1655 * mos7840_send_cmd_write_baud_rate 1656 * this function sends the proper command to change the baud rate of the 1657 * specified port. 1658 *****************************************************************************/ 1659 1660 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1661 int baudRate) 1662 { 1663 int divisor = 0; 1664 int status; 1665 __u16 Data; 1666 unsigned char number; 1667 __u16 clk_sel_val; 1668 struct usb_serial_port *port; 1669 1670 if (mos7840_port == NULL) 1671 return -1; 1672 1673 port = mos7840_port->port; 1674 if (mos7840_port_paranoia_check(port, __func__)) 1675 return -1; 1676 1677 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1678 return -1; 1679 1680 number = mos7840_port->port->port_number; 1681 1682 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate); 1683 /* reset clk_uart_sel in spregOffset */ 1684 if (baudRate > 115200) { 1685 #ifdef HW_flow_control 1686 /* NOTE: need to see the pther register to modify */ 1687 /* setting h/w flow control bit to 1 */ 1688 Data = 0x2b; 1689 mos7840_port->shadowMCR = Data; 1690 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1691 Data); 1692 if (status < 0) { 1693 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1694 return -1; 1695 } 1696 #endif 1697 1698 } else { 1699 #ifdef HW_flow_control 1700 /* setting h/w flow control bit to 0 */ 1701 Data = 0xb; 1702 mos7840_port->shadowMCR = Data; 1703 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1704 Data); 1705 if (status < 0) { 1706 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1707 return -1; 1708 } 1709 #endif 1710 1711 } 1712 1713 if (1) { /* baudRate <= 115200) */ 1714 clk_sel_val = 0x0; 1715 Data = 0x0; 1716 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, 1717 &clk_sel_val); 1718 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1719 &Data); 1720 if (status < 0) { 1721 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); 1722 return -1; 1723 } 1724 Data = (Data & 0x8f) | clk_sel_val; 1725 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1726 Data); 1727 if (status < 0) { 1728 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1729 return -1; 1730 } 1731 /* Calculate the Divisor */ 1732 1733 if (status) { 1734 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1735 return status; 1736 } 1737 /* Enable access to divisor latch */ 1738 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1739 mos7840_port->shadowLCR = Data; 1740 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1741 1742 /* Write the divisor */ 1743 Data = (unsigned char)(divisor & 0xff); 1744 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); 1745 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1746 1747 Data = (unsigned char)((divisor & 0xff00) >> 8); 1748 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); 1749 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1750 1751 /* Disable access to divisor latch */ 1752 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1753 mos7840_port->shadowLCR = Data; 1754 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1755 1756 } 1757 return status; 1758 } 1759 1760 /***************************************************************************** 1761 * mos7840_change_port_settings 1762 * This routine is called to set the UART on the device to match 1763 * the specified new settings. 1764 *****************************************************************************/ 1765 1766 static void mos7840_change_port_settings(struct tty_struct *tty, 1767 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1768 { 1769 int baud; 1770 unsigned cflag; 1771 unsigned iflag; 1772 __u8 lData; 1773 __u8 lParity; 1774 __u8 lStop; 1775 int status; 1776 __u16 Data; 1777 struct usb_serial_port *port; 1778 struct usb_serial *serial; 1779 1780 if (mos7840_port == NULL) 1781 return; 1782 1783 port = mos7840_port->port; 1784 1785 if (mos7840_port_paranoia_check(port, __func__)) 1786 return; 1787 1788 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1789 return; 1790 1791 serial = port->serial; 1792 1793 if (!mos7840_port->open) { 1794 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1795 return; 1796 } 1797 1798 lData = LCR_BITS_8; 1799 lStop = LCR_STOP_1; 1800 lParity = LCR_PAR_NONE; 1801 1802 cflag = tty->termios.c_cflag; 1803 iflag = tty->termios.c_iflag; 1804 1805 /* Change the number of bits */ 1806 switch (cflag & CSIZE) { 1807 case CS5: 1808 lData = LCR_BITS_5; 1809 break; 1810 1811 case CS6: 1812 lData = LCR_BITS_6; 1813 break; 1814 1815 case CS7: 1816 lData = LCR_BITS_7; 1817 break; 1818 1819 default: 1820 case CS8: 1821 lData = LCR_BITS_8; 1822 break; 1823 } 1824 1825 /* Change the Parity bit */ 1826 if (cflag & PARENB) { 1827 if (cflag & PARODD) { 1828 lParity = LCR_PAR_ODD; 1829 dev_dbg(&port->dev, "%s - parity = odd\n", __func__); 1830 } else { 1831 lParity = LCR_PAR_EVEN; 1832 dev_dbg(&port->dev, "%s - parity = even\n", __func__); 1833 } 1834 1835 } else { 1836 dev_dbg(&port->dev, "%s - parity = none\n", __func__); 1837 } 1838 1839 if (cflag & CMSPAR) 1840 lParity = lParity | 0x20; 1841 1842 /* Change the Stop bit */ 1843 if (cflag & CSTOPB) { 1844 lStop = LCR_STOP_2; 1845 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); 1846 } else { 1847 lStop = LCR_STOP_1; 1848 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); 1849 } 1850 1851 /* Update the LCR with the correct value */ 1852 mos7840_port->shadowLCR &= 1853 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1854 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1855 1856 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, 1857 mos7840_port->shadowLCR); 1858 /* Disable Interrupts */ 1859 Data = 0x00; 1860 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1861 1862 Data = 0x00; 1863 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1864 1865 Data = 0xcf; 1866 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1867 1868 /* Send the updated LCR value to the mos7840 */ 1869 Data = mos7840_port->shadowLCR; 1870 1871 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1872 1873 Data = 0x00b; 1874 mos7840_port->shadowMCR = Data; 1875 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1876 Data = 0x00b; 1877 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1878 1879 /* set up the MCR register and send it to the mos7840 */ 1880 1881 mos7840_port->shadowMCR = MCR_MASTER_IE; 1882 if (cflag & CBAUD) 1883 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1884 1885 if (cflag & CRTSCTS) 1886 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1887 else 1888 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 1889 1890 Data = mos7840_port->shadowMCR; 1891 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1892 1893 /* Determine divisor based on baud rate */ 1894 baud = tty_get_baud_rate(tty); 1895 1896 if (!baud) { 1897 /* pick a default, any default... */ 1898 dev_dbg(&port->dev, "%s", "Picked default baud...\n"); 1899 baud = 9600; 1900 } 1901 1902 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); 1903 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 1904 1905 /* Enable Interrupts */ 1906 Data = 0x0c; 1907 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1908 1909 if (mos7840_port->read_urb_busy == false) { 1910 mos7840_port->read_urb_busy = true; 1911 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 1912 if (status) { 1913 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1914 status); 1915 mos7840_port->read_urb_busy = false; 1916 } 1917 } 1918 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, 1919 mos7840_port->shadowLCR); 1920 } 1921 1922 /***************************************************************************** 1923 * mos7840_set_termios 1924 * this function is called by the tty driver when it wants to change 1925 * the termios structure 1926 *****************************************************************************/ 1927 1928 static void mos7840_set_termios(struct tty_struct *tty, 1929 struct usb_serial_port *port, 1930 struct ktermios *old_termios) 1931 { 1932 int status; 1933 unsigned int cflag; 1934 struct usb_serial *serial; 1935 struct moschip_port *mos7840_port; 1936 1937 if (mos7840_port_paranoia_check(port, __func__)) 1938 return; 1939 1940 serial = port->serial; 1941 1942 if (mos7840_serial_paranoia_check(serial, __func__)) 1943 return; 1944 1945 mos7840_port = mos7840_get_port_private(port); 1946 1947 if (mos7840_port == NULL) 1948 return; 1949 1950 if (!mos7840_port->open) { 1951 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1952 return; 1953 } 1954 1955 dev_dbg(&port->dev, "%s", "setting termios - \n"); 1956 1957 cflag = tty->termios.c_cflag; 1958 1959 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, 1960 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); 1961 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, 1962 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 1963 1964 /* change the port settings to the new ones specified */ 1965 1966 mos7840_change_port_settings(tty, mos7840_port, old_termios); 1967 1968 if (!mos7840_port->read_urb) { 1969 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n"); 1970 return; 1971 } 1972 1973 if (mos7840_port->read_urb_busy == false) { 1974 mos7840_port->read_urb_busy = true; 1975 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 1976 if (status) { 1977 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1978 status); 1979 mos7840_port->read_urb_busy = false; 1980 } 1981 } 1982 } 1983 1984 /***************************************************************************** 1985 * mos7840_get_lsr_info - get line status register info 1986 * 1987 * Purpose: Let user call ioctl() to get info when the UART physically 1988 * is emptied. On bus types like RS485, the transmitter must 1989 * release the bus after transmitting. This must be done when 1990 * the transmit shift register is empty, not be done when the 1991 * transmit holding register is empty. This functionality 1992 * allows an RS485 driver to be written in user space. 1993 *****************************************************************************/ 1994 1995 static int mos7840_get_lsr_info(struct tty_struct *tty, 1996 unsigned int __user *value) 1997 { 1998 int count; 1999 unsigned int result = 0; 2000 2001 count = mos7840_chars_in_buffer(tty); 2002 if (count == 0) 2003 result = TIOCSER_TEMT; 2004 2005 if (copy_to_user(value, &result, sizeof(int))) 2006 return -EFAULT; 2007 return 0; 2008 } 2009 2010 /***************************************************************************** 2011 * mos7840_get_serial_info 2012 * function to get information about serial port 2013 *****************************************************************************/ 2014 2015 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2016 struct serial_struct __user *retinfo) 2017 { 2018 struct serial_struct tmp; 2019 2020 if (mos7840_port == NULL) 2021 return -1; 2022 2023 if (!retinfo) 2024 return -EFAULT; 2025 2026 memset(&tmp, 0, sizeof(tmp)); 2027 2028 tmp.type = PORT_16550A; 2029 tmp.line = mos7840_port->port->minor; 2030 tmp.port = mos7840_port->port->port_number; 2031 tmp.irq = 0; 2032 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2033 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2034 tmp.baud_base = 9600; 2035 tmp.close_delay = 5 * HZ; 2036 tmp.closing_wait = 30 * HZ; 2037 2038 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2039 return -EFAULT; 2040 return 0; 2041 } 2042 2043 /***************************************************************************** 2044 * SerialIoctl 2045 * this function handles any ioctl calls to the driver 2046 *****************************************************************************/ 2047 2048 static int mos7840_ioctl(struct tty_struct *tty, 2049 unsigned int cmd, unsigned long arg) 2050 { 2051 struct usb_serial_port *port = tty->driver_data; 2052 void __user *argp = (void __user *)arg; 2053 struct moschip_port *mos7840_port; 2054 2055 if (mos7840_port_paranoia_check(port, __func__)) 2056 return -1; 2057 2058 mos7840_port = mos7840_get_port_private(port); 2059 2060 if (mos7840_port == NULL) 2061 return -1; 2062 2063 switch (cmd) { 2064 /* return number of bytes available */ 2065 2066 case TIOCSERGETLSR: 2067 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 2068 return mos7840_get_lsr_info(tty, argp); 2069 2070 case TIOCGSERIAL: 2071 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); 2072 return mos7840_get_serial_info(mos7840_port, argp); 2073 2074 case TIOCSSERIAL: 2075 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__); 2076 break; 2077 default: 2078 break; 2079 } 2080 return -ENOIOCTLCMD; 2081 } 2082 2083 static int mos7810_check(struct usb_serial *serial) 2084 { 2085 int i, pass_count = 0; 2086 u8 *buf; 2087 __u16 data = 0, mcr_data = 0; 2088 __u16 test_pattern = 0x55AA; 2089 int res; 2090 2091 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2092 if (!buf) 2093 return 0; /* failed to identify 7810 */ 2094 2095 /* Store MCR setting */ 2096 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2097 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, 2098 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2099 if (res == VENDOR_READ_LENGTH) 2100 mcr_data = *buf; 2101 2102 for (i = 0; i < 16; i++) { 2103 /* Send the 1-bit test pattern out to MCS7810 test pin */ 2104 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2105 MCS_WRREQ, MCS_WR_RTYPE, 2106 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), 2107 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); 2108 2109 /* Read the test pattern back */ 2110 res = usb_control_msg(serial->dev, 2111 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, 2112 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2113 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2114 if (res == VENDOR_READ_LENGTH) 2115 data = *buf; 2116 2117 /* If this is a MCS7810 device, both test patterns must match */ 2118 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) 2119 break; 2120 2121 pass_count++; 2122 } 2123 2124 /* Restore MCR setting */ 2125 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, 2126 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 2127 0, MOS_WDR_TIMEOUT); 2128 2129 kfree(buf); 2130 2131 if (pass_count == 16) 2132 return 1; 2133 2134 return 0; 2135 } 2136 2137 static int mos7840_probe(struct usb_serial *serial, 2138 const struct usb_device_id *id) 2139 { 2140 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); 2141 u8 *buf; 2142 int device_type; 2143 2144 if (product == MOSCHIP_DEVICE_ID_7810 || 2145 product == MOSCHIP_DEVICE_ID_7820) { 2146 device_type = product; 2147 goto out; 2148 } 2149 2150 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2151 if (!buf) 2152 return -ENOMEM; 2153 2154 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2155 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2156 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2157 2158 /* For a MCS7840 device GPIO0 must be set to 1 */ 2159 if (buf[0] & 0x01) 2160 device_type = MOSCHIP_DEVICE_ID_7840; 2161 else if (mos7810_check(serial)) 2162 device_type = MOSCHIP_DEVICE_ID_7810; 2163 else 2164 device_type = MOSCHIP_DEVICE_ID_7820; 2165 2166 kfree(buf); 2167 out: 2168 usb_set_serial_data(serial, (void *)(unsigned long)device_type); 2169 2170 return 0; 2171 } 2172 2173 static int mos7840_calc_num_ports(struct usb_serial *serial) 2174 { 2175 int device_type = (unsigned long)usb_get_serial_data(serial); 2176 int mos7840_num_ports; 2177 2178 mos7840_num_ports = (device_type >> 4) & 0x000F; 2179 2180 return mos7840_num_ports; 2181 } 2182 2183 static int mos7840_port_probe(struct usb_serial_port *port) 2184 { 2185 struct usb_serial *serial = port->serial; 2186 int device_type = (unsigned long)usb_get_serial_data(serial); 2187 struct moschip_port *mos7840_port; 2188 int status; 2189 int pnum; 2190 __u16 Data; 2191 2192 /* we set up the pointers to the endpoints in the mos7840_open * 2193 * function, as the structures aren't created yet. */ 2194 2195 pnum = port->port_number; 2196 2197 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); 2198 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2199 if (!mos7840_port) 2200 return -ENOMEM; 2201 2202 /* Initialize all port interrupt end point to port 0 int 2203 * endpoint. Our device has only one interrupt end point 2204 * common to all port */ 2205 2206 mos7840_port->port = port; 2207 mos7840_set_port_private(port, mos7840_port); 2208 spin_lock_init(&mos7840_port->pool_lock); 2209 2210 /* minor is not initialised until later by 2211 * usb-serial.c:get_free_serial() and cannot therefore be used 2212 * to index device instances */ 2213 mos7840_port->port_num = pnum + 1; 2214 dev_dbg(&port->dev, "port->minor = %d\n", port->minor); 2215 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); 2216 2217 if (mos7840_port->port_num == 1) { 2218 mos7840_port->SpRegOffset = 0x0; 2219 mos7840_port->ControlRegOffset = 0x1; 2220 mos7840_port->DcrRegOffset = 0x4; 2221 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) { 2222 mos7840_port->SpRegOffset = 0x8; 2223 mos7840_port->ControlRegOffset = 0x9; 2224 mos7840_port->DcrRegOffset = 0x16; 2225 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) { 2226 mos7840_port->SpRegOffset = 0xa; 2227 mos7840_port->ControlRegOffset = 0xb; 2228 mos7840_port->DcrRegOffset = 0x19; 2229 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) { 2230 mos7840_port->SpRegOffset = 0xa; 2231 mos7840_port->ControlRegOffset = 0xb; 2232 mos7840_port->DcrRegOffset = 0x19; 2233 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) { 2234 mos7840_port->SpRegOffset = 0xc; 2235 mos7840_port->ControlRegOffset = 0xd; 2236 mos7840_port->DcrRegOffset = 0x1c; 2237 } 2238 mos7840_dump_serial_port(port, mos7840_port); 2239 mos7840_set_port_private(port, mos7840_port); 2240 2241 /* enable rx_disable bit in control register */ 2242 status = mos7840_get_reg_sync(port, 2243 mos7840_port->ControlRegOffset, &Data); 2244 if (status < 0) { 2245 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); 2246 goto out; 2247 } else 2248 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); 2249 Data |= 0x08; /* setting driver done bit */ 2250 Data |= 0x04; /* sp1_bit to have cts change reflect in 2251 modem status reg */ 2252 2253 /* Data |= 0x20; //rx_disable bit */ 2254 status = mos7840_set_reg_sync(port, 2255 mos7840_port->ControlRegOffset, Data); 2256 if (status < 0) { 2257 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2258 goto out; 2259 } else 2260 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); 2261 2262 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2263 and 0x24 in DCR3 */ 2264 Data = 0x01; 2265 status = mos7840_set_reg_sync(port, 2266 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2267 if (status < 0) { 2268 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); 2269 goto out; 2270 } else 2271 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); 2272 2273 Data = 0x05; 2274 status = mos7840_set_reg_sync(port, 2275 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2276 if (status < 0) { 2277 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); 2278 goto out; 2279 } else 2280 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); 2281 2282 Data = 0x24; 2283 status = mos7840_set_reg_sync(port, 2284 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2285 if (status < 0) { 2286 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); 2287 goto out; 2288 } else 2289 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); 2290 2291 /* write values in clkstart0x0 and clkmulti 0x20 */ 2292 Data = 0x0; 2293 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); 2294 if (status < 0) { 2295 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2296 goto out; 2297 } else 2298 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2299 2300 Data = 0x20; 2301 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); 2302 if (status < 0) { 2303 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); 2304 goto error; 2305 } else 2306 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); 2307 2308 /* write value 0x0 to scratchpad register */ 2309 Data = 0x00; 2310 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); 2311 if (status < 0) { 2312 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); 2313 goto out; 2314 } else 2315 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); 2316 2317 /* Zero Length flag register */ 2318 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { 2319 Data = 0xff; 2320 status = mos7840_set_reg_sync(port, 2321 (__u16) (ZLP_REG1 + 2322 ((__u16)mos7840_port->port_num)), Data); 2323 dev_dbg(&port->dev, "ZLIP offset %x\n", 2324 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); 2325 if (status < 0) { 2326 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); 2327 goto out; 2328 } else 2329 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); 2330 } else { 2331 Data = 0xff; 2332 status = mos7840_set_reg_sync(port, 2333 (__u16) (ZLP_REG1 + 2334 ((__u16)mos7840_port->port_num) - 0x1), Data); 2335 dev_dbg(&port->dev, "ZLIP offset %x\n", 2336 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); 2337 if (status < 0) { 2338 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); 2339 goto out; 2340 } else 2341 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); 2342 2343 } 2344 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2345 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2346 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2347 GFP_KERNEL); 2348 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2349 !mos7840_port->dr) { 2350 status = -ENOMEM; 2351 goto error; 2352 } 2353 2354 mos7840_port->has_led = false; 2355 2356 /* Initialize LED timers */ 2357 if (device_type == MOSCHIP_DEVICE_ID_7810) { 2358 mos7840_port->has_led = true; 2359 2360 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL); 2361 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr), 2362 GFP_KERNEL); 2363 if (!mos7840_port->led_urb || !mos7840_port->led_dr) { 2364 status = -ENOMEM; 2365 goto error; 2366 } 2367 2368 init_timer(&mos7840_port->led_timer1); 2369 mos7840_port->led_timer1.function = mos7840_led_off; 2370 mos7840_port->led_timer1.expires = 2371 jiffies + msecs_to_jiffies(LED_ON_MS); 2372 mos7840_port->led_timer1.data = (unsigned long)mos7840_port; 2373 2374 init_timer(&mos7840_port->led_timer2); 2375 mos7840_port->led_timer2.function = mos7840_led_flag_off; 2376 mos7840_port->led_timer2.expires = 2377 jiffies + msecs_to_jiffies(LED_OFF_MS); 2378 mos7840_port->led_timer2.data = (unsigned long)mos7840_port; 2379 2380 /* Turn off LED */ 2381 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2382 } 2383 out: 2384 if (pnum == serial->num_ports - 1) { 2385 /* Zero Length flag enable */ 2386 Data = 0x0f; 2387 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2388 if (status < 0) { 2389 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status); 2390 goto error; 2391 } else 2392 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status); 2393 2394 /* setting configuration feature to one */ 2395 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2396 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 2397 MOS_WDR_TIMEOUT); 2398 } 2399 return 0; 2400 error: 2401 kfree(mos7840_port->led_dr); 2402 usb_free_urb(mos7840_port->led_urb); 2403 kfree(mos7840_port->dr); 2404 kfree(mos7840_port->ctrl_buf); 2405 usb_free_urb(mos7840_port->control_urb); 2406 kfree(mos7840_port); 2407 2408 return status; 2409 } 2410 2411 static int mos7840_port_remove(struct usb_serial_port *port) 2412 { 2413 struct moschip_port *mos7840_port; 2414 2415 mos7840_port = mos7840_get_port_private(port); 2416 2417 if (mos7840_port->has_led) { 2418 /* Turn off LED */ 2419 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2420 2421 del_timer_sync(&mos7840_port->led_timer1); 2422 del_timer_sync(&mos7840_port->led_timer2); 2423 2424 usb_kill_urb(mos7840_port->led_urb); 2425 usb_free_urb(mos7840_port->led_urb); 2426 kfree(mos7840_port->led_dr); 2427 } 2428 usb_kill_urb(mos7840_port->control_urb); 2429 usb_free_urb(mos7840_port->control_urb); 2430 kfree(mos7840_port->ctrl_buf); 2431 kfree(mos7840_port->dr); 2432 kfree(mos7840_port); 2433 2434 return 0; 2435 } 2436 2437 static struct usb_serial_driver moschip7840_4port_device = { 2438 .driver = { 2439 .owner = THIS_MODULE, 2440 .name = "mos7840", 2441 }, 2442 .description = DRIVER_DESC, 2443 .id_table = id_table, 2444 .num_ports = 4, 2445 .open = mos7840_open, 2446 .close = mos7840_close, 2447 .write = mos7840_write, 2448 .write_room = mos7840_write_room, 2449 .chars_in_buffer = mos7840_chars_in_buffer, 2450 .throttle = mos7840_throttle, 2451 .unthrottle = mos7840_unthrottle, 2452 .calc_num_ports = mos7840_calc_num_ports, 2453 .probe = mos7840_probe, 2454 .ioctl = mos7840_ioctl, 2455 .set_termios = mos7840_set_termios, 2456 .break_ctl = mos7840_break, 2457 .tiocmget = mos7840_tiocmget, 2458 .tiocmset = mos7840_tiocmset, 2459 .tiocmiwait = usb_serial_generic_tiocmiwait, 2460 .get_icount = usb_serial_generic_get_icount, 2461 .port_probe = mos7840_port_probe, 2462 .port_remove = mos7840_port_remove, 2463 .read_bulk_callback = mos7840_bulk_in_callback, 2464 .read_int_callback = mos7840_interrupt_callback, 2465 }; 2466 2467 static struct usb_serial_driver * const serial_drivers[] = { 2468 &moschip7840_4port_device, NULL 2469 }; 2470 2471 module_usb_serial_driver(serial_drivers, id_table); 2472 2473 MODULE_DESCRIPTION(DRIVER_DESC); 2474 MODULE_LICENSE("GPL"); 2475