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; 879 880 if (urb == NULL) { 881 dev_err(&port->dev, "No more urbs???\n"); 882 continue; 883 } 884 885 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 886 GFP_KERNEL); 887 if (!urb->transfer_buffer) { 888 usb_free_urb(urb); 889 mos7840_port->write_urb_pool[j] = NULL; 890 dev_err(&port->dev, 891 "%s-out of memory for urb buffers.\n", 892 __func__); 893 continue; 894 } 895 } 896 897 /***************************************************************************** 898 * Initialize MCS7840 -- Write Init values to corresponding Registers 899 * 900 * Register Index 901 * 1 : IER 902 * 2 : FCR 903 * 3 : LCR 904 * 4 : MCR 905 * 906 * 0x08 : SP1/2 Control Reg 907 *****************************************************************************/ 908 909 /* NEED to check the following Block */ 910 911 Data = 0x0; 912 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 913 if (status < 0) { 914 dev_dbg(&port->dev, "Reading Spreg failed\n"); 915 goto err; 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 } 923 924 Data &= ~0x80; 925 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 926 if (status < 0) { 927 dev_dbg(&port->dev, "writing Spreg failed\n"); 928 goto err; 929 } 930 /* End of block to be checked */ 931 932 Data = 0x0; 933 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 934 &Data); 935 if (status < 0) { 936 dev_dbg(&port->dev, "Reading Controlreg failed\n"); 937 goto err; 938 } 939 Data |= 0x08; /* Driver done bit */ 940 Data |= 0x20; /* rx_disable */ 941 status = mos7840_set_reg_sync(port, 942 mos7840_port->ControlRegOffset, Data); 943 if (status < 0) { 944 dev_dbg(&port->dev, "writing Controlreg failed\n"); 945 goto err; 946 } 947 /* do register settings here */ 948 /* Set all regs to the device default values. */ 949 /*********************************** 950 * First Disable all interrupts. 951 ***********************************/ 952 Data = 0x00; 953 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 954 if (status < 0) { 955 dev_dbg(&port->dev, "disabling interrupts failed\n"); 956 goto err; 957 } 958 /* Set FIFO_CONTROL_REGISTER to the default value */ 959 Data = 0x00; 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 = 0xcf; 967 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 968 if (status < 0) { 969 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 970 goto err; 971 } 972 973 Data = 0x03; 974 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 975 mos7840_port->shadowLCR = Data; 976 977 Data = 0x0b; 978 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 979 mos7840_port->shadowMCR = Data; 980 981 Data = 0x00; 982 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 983 mos7840_port->shadowLCR = Data; 984 985 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 986 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 987 988 Data = 0x0c; 989 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 990 991 Data = 0x0; 992 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 993 994 Data = 0x00; 995 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 996 997 Data = Data & ~SERIAL_LCR_DLAB; 998 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 999 mos7840_port->shadowLCR = Data; 1000 1001 /* clearing Bulkin and Bulkout Fifo */ 1002 Data = 0x0; 1003 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 1004 1005 Data = Data | 0x0c; 1006 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1007 1008 Data = Data & ~0x0c; 1009 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1010 /* Finally enable all interrupts */ 1011 Data = 0x0c; 1012 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1013 1014 /* clearing rx_disable */ 1015 Data = 0x0; 1016 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1017 &Data); 1018 Data = Data & ~0x20; 1019 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1020 Data); 1021 1022 /* rx_negate */ 1023 Data = 0x0; 1024 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1025 &Data); 1026 Data = Data | 0x10; 1027 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1028 Data); 1029 1030 /* Check to see if we've set up our endpoint info yet * 1031 * (can't set it up in mos7840_startup as the structures * 1032 * were not set up at that time.) */ 1033 if (port0->open_ports == 1) { 1034 if (serial->port[0]->interrupt_in_buffer == NULL) { 1035 /* set up interrupt urb */ 1036 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1037 serial->dev, 1038 usb_rcvintpipe(serial->dev, 1039 serial->port[0]->interrupt_in_endpointAddress), 1040 serial->port[0]->interrupt_in_buffer, 1041 serial->port[0]->interrupt_in_urb-> 1042 transfer_buffer_length, 1043 mos7840_interrupt_callback, 1044 serial, 1045 serial->port[0]->interrupt_in_urb->interval); 1046 1047 /* start interrupt read for mos7840 * 1048 * will continue as long as mos7840 is connected */ 1049 1050 response = 1051 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1052 GFP_KERNEL); 1053 if (response) { 1054 dev_err(&port->dev, "%s - Error %d submitting " 1055 "interrupt urb\n", __func__, response); 1056 } 1057 1058 } 1059 1060 } 1061 1062 /* see if we've set up our endpoint info yet * 1063 * (can't set it up in mos7840_startup as the * 1064 * structures were not set up at that time.) */ 1065 1066 dev_dbg(&port->dev, "port number is %d\n", port->port_number); 1067 dev_dbg(&port->dev, "minor number is %d\n", port->minor); 1068 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress); 1069 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress); 1070 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress); 1071 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num); 1072 mos7840_port->read_urb = port->read_urb; 1073 1074 /* set up our bulk in urb */ 1075 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1076 usb_fill_bulk_urb(mos7840_port->read_urb, 1077 serial->dev, 1078 usb_rcvbulkpipe(serial->dev, 1079 (port->bulk_in_endpointAddress) + 2), 1080 port->bulk_in_buffer, 1081 mos7840_port->read_urb->transfer_buffer_length, 1082 mos7840_bulk_in_callback, mos7840_port); 1083 } else { 1084 usb_fill_bulk_urb(mos7840_port->read_urb, 1085 serial->dev, 1086 usb_rcvbulkpipe(serial->dev, 1087 port->bulk_in_endpointAddress), 1088 port->bulk_in_buffer, 1089 mos7840_port->read_urb->transfer_buffer_length, 1090 mos7840_bulk_in_callback, mos7840_port); 1091 } 1092 1093 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress); 1094 mos7840_port->read_urb_busy = true; 1095 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1096 if (response) { 1097 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1098 __func__, response); 1099 mos7840_port->read_urb_busy = false; 1100 } 1101 1102 /* initialize our port settings */ 1103 /* Must set to enable ints! */ 1104 mos7840_port->shadowMCR = MCR_MASTER_IE; 1105 /* send a open port command */ 1106 mos7840_port->open = 1; 1107 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1108 1109 return 0; 1110 err: 1111 for (j = 0; j < NUM_URBS; ++j) { 1112 urb = mos7840_port->write_urb_pool[j]; 1113 if (!urb) 1114 continue; 1115 kfree(urb->transfer_buffer); 1116 usb_free_urb(urb); 1117 } 1118 return status; 1119 } 1120 1121 /***************************************************************************** 1122 * mos7840_chars_in_buffer 1123 * this function is called by the tty driver when it wants to know how many 1124 * bytes of data we currently have outstanding in the port (data that has 1125 * been written, but hasn't made it out the port yet) 1126 * If successful, we return the number of bytes left to be written in the 1127 * system, 1128 * Otherwise we return zero. 1129 *****************************************************************************/ 1130 1131 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1132 { 1133 struct usb_serial_port *port = tty->driver_data; 1134 int i; 1135 int chars = 0; 1136 unsigned long flags; 1137 struct moschip_port *mos7840_port; 1138 1139 if (mos7840_port_paranoia_check(port, __func__)) 1140 return 0; 1141 1142 mos7840_port = mos7840_get_port_private(port); 1143 if (mos7840_port == NULL) 1144 return 0; 1145 1146 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1147 for (i = 0; i < NUM_URBS; ++i) { 1148 if (mos7840_port->busy[i]) { 1149 struct urb *urb = mos7840_port->write_urb_pool[i]; 1150 chars += urb->transfer_buffer_length; 1151 } 1152 } 1153 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1154 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 1155 return chars; 1156 1157 } 1158 1159 /***************************************************************************** 1160 * mos7840_close 1161 * this function is called by the tty driver when a port is closed 1162 *****************************************************************************/ 1163 1164 static void mos7840_close(struct usb_serial_port *port) 1165 { 1166 struct usb_serial *serial; 1167 struct moschip_port *mos7840_port; 1168 struct moschip_port *port0; 1169 int j; 1170 __u16 Data; 1171 1172 if (mos7840_port_paranoia_check(port, __func__)) 1173 return; 1174 1175 serial = mos7840_get_usb_serial(port, __func__); 1176 if (!serial) 1177 return; 1178 1179 mos7840_port = mos7840_get_port_private(port); 1180 port0 = mos7840_get_port_private(serial->port[0]); 1181 1182 if (mos7840_port == NULL || port0 == NULL) 1183 return; 1184 1185 for (j = 0; j < NUM_URBS; ++j) 1186 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1187 1188 /* Freeing Write URBs */ 1189 for (j = 0; j < NUM_URBS; ++j) { 1190 if (mos7840_port->write_urb_pool[j]) { 1191 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1192 kfree(mos7840_port->write_urb_pool[j]-> 1193 transfer_buffer); 1194 1195 usb_free_urb(mos7840_port->write_urb_pool[j]); 1196 } 1197 } 1198 1199 usb_kill_urb(mos7840_port->write_urb); 1200 usb_kill_urb(mos7840_port->read_urb); 1201 mos7840_port->read_urb_busy = false; 1202 1203 port0->open_ports--; 1204 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports); 1205 if (port0->open_ports == 0) { 1206 if (serial->port[0]->interrupt_in_urb) { 1207 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n"); 1208 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1209 } 1210 } 1211 1212 if (mos7840_port->write_urb) { 1213 /* if this urb had a transfer buffer already (old tx) free it */ 1214 kfree(mos7840_port->write_urb->transfer_buffer); 1215 usb_free_urb(mos7840_port->write_urb); 1216 } 1217 1218 Data = 0x0; 1219 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1220 1221 Data = 0x00; 1222 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1223 1224 mos7840_port->open = 0; 1225 } 1226 1227 /***************************************************************************** 1228 * mos7840_break 1229 * this function sends a break to the port 1230 *****************************************************************************/ 1231 static void mos7840_break(struct tty_struct *tty, int break_state) 1232 { 1233 struct usb_serial_port *port = tty->driver_data; 1234 unsigned char data; 1235 struct usb_serial *serial; 1236 struct moschip_port *mos7840_port; 1237 1238 if (mos7840_port_paranoia_check(port, __func__)) 1239 return; 1240 1241 serial = mos7840_get_usb_serial(port, __func__); 1242 if (!serial) 1243 return; 1244 1245 mos7840_port = mos7840_get_port_private(port); 1246 1247 if (mos7840_port == NULL) 1248 return; 1249 1250 if (break_state == -1) 1251 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1252 else 1253 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1254 1255 /* FIXME: no locking on shadowLCR anywhere in driver */ 1256 mos7840_port->shadowLCR = data; 1257 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1258 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1259 mos7840_port->shadowLCR); 1260 } 1261 1262 /***************************************************************************** 1263 * mos7840_write_room 1264 * this function is called by the tty driver when it wants to know how many 1265 * bytes of data we can accept for a specific port. 1266 * If successful, we return the amount of room that we have for this port 1267 * Otherwise we return a negative error number. 1268 *****************************************************************************/ 1269 1270 static int mos7840_write_room(struct tty_struct *tty) 1271 { 1272 struct usb_serial_port *port = tty->driver_data; 1273 int i; 1274 int room = 0; 1275 unsigned long flags; 1276 struct moschip_port *mos7840_port; 1277 1278 if (mos7840_port_paranoia_check(port, __func__)) 1279 return -1; 1280 1281 mos7840_port = mos7840_get_port_private(port); 1282 if (mos7840_port == NULL) 1283 return -1; 1284 1285 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1286 for (i = 0; i < NUM_URBS; ++i) { 1287 if (!mos7840_port->busy[i]) 1288 room += URB_TRANSFER_BUFFER_SIZE; 1289 } 1290 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1291 1292 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1293 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); 1294 return room; 1295 1296 } 1297 1298 /***************************************************************************** 1299 * mos7840_write 1300 * this function is called by the tty driver when data should be written to 1301 * the port. 1302 * If successful, we return the number of bytes written, otherwise we 1303 * return a negative error number. 1304 *****************************************************************************/ 1305 1306 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1307 const unsigned char *data, int count) 1308 { 1309 int status; 1310 int i; 1311 int bytes_sent = 0; 1312 int transfer_size; 1313 unsigned long flags; 1314 1315 struct moschip_port *mos7840_port; 1316 struct usb_serial *serial; 1317 struct urb *urb; 1318 /* __u16 Data; */ 1319 const unsigned char *current_position = data; 1320 unsigned char *data1; 1321 1322 #ifdef NOTMOS7840 1323 Data = 0x00; 1324 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1325 mos7840_port->shadowLCR = Data; 1326 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data); 1327 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1328 1329 /* Data = 0x03; */ 1330 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1331 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1332 1333 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1334 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1335 1336 /* Data = 0x0c; */ 1337 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1338 Data = 0x00; 1339 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1340 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data); 1341 1342 Data = 0x0; 1343 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1344 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data); 1345 1346 Data = Data & ~SERIAL_LCR_DLAB; 1347 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1348 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1349 #endif 1350 1351 if (mos7840_port_paranoia_check(port, __func__)) 1352 return -1; 1353 1354 serial = port->serial; 1355 if (mos7840_serial_paranoia_check(serial, __func__)) 1356 return -1; 1357 1358 mos7840_port = mos7840_get_port_private(port); 1359 if (mos7840_port == NULL) 1360 return -1; 1361 1362 /* try to find a free urb in the list */ 1363 urb = NULL; 1364 1365 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1366 for (i = 0; i < NUM_URBS; ++i) { 1367 if (!mos7840_port->busy[i]) { 1368 mos7840_port->busy[i] = 1; 1369 urb = mos7840_port->write_urb_pool[i]; 1370 dev_dbg(&port->dev, "URB:%d\n", i); 1371 break; 1372 } 1373 } 1374 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1375 1376 if (urb == NULL) { 1377 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); 1378 goto exit; 1379 } 1380 1381 if (urb->transfer_buffer == NULL) { 1382 urb->transfer_buffer = 1383 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1384 1385 if (urb->transfer_buffer == NULL) { 1386 dev_err_console(port, "%s no more kernel memory...\n", 1387 __func__); 1388 goto exit; 1389 } 1390 } 1391 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1392 1393 memcpy(urb->transfer_buffer, current_position, transfer_size); 1394 1395 /* fill urb with data and submit */ 1396 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1397 usb_fill_bulk_urb(urb, 1398 serial->dev, 1399 usb_sndbulkpipe(serial->dev, 1400 (port->bulk_out_endpointAddress) + 2), 1401 urb->transfer_buffer, 1402 transfer_size, 1403 mos7840_bulk_out_data_callback, mos7840_port); 1404 } else { 1405 usb_fill_bulk_urb(urb, 1406 serial->dev, 1407 usb_sndbulkpipe(serial->dev, 1408 port->bulk_out_endpointAddress), 1409 urb->transfer_buffer, 1410 transfer_size, 1411 mos7840_bulk_out_data_callback, mos7840_port); 1412 } 1413 1414 data1 = urb->transfer_buffer; 1415 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); 1416 1417 if (mos7840_port->has_led) 1418 mos7840_led_activity(port); 1419 1420 /* send it down the pipe */ 1421 status = usb_submit_urb(urb, GFP_ATOMIC); 1422 1423 if (status) { 1424 mos7840_port->busy[i] = 0; 1425 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 1426 "with status = %d\n", __func__, status); 1427 bytes_sent = status; 1428 goto exit; 1429 } 1430 bytes_sent = transfer_size; 1431 port->icount.tx += transfer_size; 1432 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx); 1433 exit: 1434 return bytes_sent; 1435 1436 } 1437 1438 /***************************************************************************** 1439 * mos7840_throttle 1440 * this function is called by the tty driver when it wants to stop the data 1441 * being read from the port. 1442 *****************************************************************************/ 1443 1444 static void mos7840_throttle(struct tty_struct *tty) 1445 { 1446 struct usb_serial_port *port = tty->driver_data; 1447 struct moschip_port *mos7840_port; 1448 int status; 1449 1450 if (mos7840_port_paranoia_check(port, __func__)) 1451 return; 1452 1453 mos7840_port = mos7840_get_port_private(port); 1454 1455 if (mos7840_port == NULL) 1456 return; 1457 1458 if (!mos7840_port->open) { 1459 dev_dbg(&port->dev, "%s", "port not opened\n"); 1460 return; 1461 } 1462 1463 /* if we are implementing XON/XOFF, send the stop character */ 1464 if (I_IXOFF(tty)) { 1465 unsigned char stop_char = STOP_CHAR(tty); 1466 status = mos7840_write(tty, port, &stop_char, 1); 1467 if (status <= 0) 1468 return; 1469 } 1470 /* if we are implementing RTS/CTS, toggle that line */ 1471 if (tty->termios.c_cflag & CRTSCTS) { 1472 mos7840_port->shadowMCR &= ~MCR_RTS; 1473 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1474 mos7840_port->shadowMCR); 1475 if (status < 0) 1476 return; 1477 } 1478 } 1479 1480 /***************************************************************************** 1481 * mos7840_unthrottle 1482 * this function is called by the tty driver when it wants to resume 1483 * the data being read from the port (called after mos7840_throttle is 1484 * called) 1485 *****************************************************************************/ 1486 static void mos7840_unthrottle(struct tty_struct *tty) 1487 { 1488 struct usb_serial_port *port = tty->driver_data; 1489 int status; 1490 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1491 1492 if (mos7840_port_paranoia_check(port, __func__)) 1493 return; 1494 1495 if (mos7840_port == NULL) 1496 return; 1497 1498 if (!mos7840_port->open) { 1499 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1500 return; 1501 } 1502 1503 /* if we are implementing XON/XOFF, send the start character */ 1504 if (I_IXOFF(tty)) { 1505 unsigned char start_char = START_CHAR(tty); 1506 status = mos7840_write(tty, port, &start_char, 1); 1507 if (status <= 0) 1508 return; 1509 } 1510 1511 /* if we are implementing RTS/CTS, toggle that line */ 1512 if (tty->termios.c_cflag & CRTSCTS) { 1513 mos7840_port->shadowMCR |= MCR_RTS; 1514 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1515 mos7840_port->shadowMCR); 1516 if (status < 0) 1517 return; 1518 } 1519 } 1520 1521 static int mos7840_tiocmget(struct tty_struct *tty) 1522 { 1523 struct usb_serial_port *port = tty->driver_data; 1524 struct moschip_port *mos7840_port; 1525 unsigned int result; 1526 __u16 msr; 1527 __u16 mcr; 1528 int status; 1529 mos7840_port = mos7840_get_port_private(port); 1530 1531 if (mos7840_port == NULL) 1532 return -ENODEV; 1533 1534 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1535 if (status != 1) 1536 return -EIO; 1537 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1538 if (status != 1) 1539 return -EIO; 1540 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1541 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1542 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1543 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1544 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1545 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1546 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1547 1548 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 1549 1550 return result; 1551 } 1552 1553 static int mos7840_tiocmset(struct tty_struct *tty, 1554 unsigned int set, unsigned int clear) 1555 { 1556 struct usb_serial_port *port = tty->driver_data; 1557 struct moschip_port *mos7840_port; 1558 unsigned int mcr; 1559 int status; 1560 1561 mos7840_port = mos7840_get_port_private(port); 1562 1563 if (mos7840_port == NULL) 1564 return -ENODEV; 1565 1566 /* FIXME: What locks the port registers ? */ 1567 mcr = mos7840_port->shadowMCR; 1568 if (clear & TIOCM_RTS) 1569 mcr &= ~MCR_RTS; 1570 if (clear & TIOCM_DTR) 1571 mcr &= ~MCR_DTR; 1572 if (clear & TIOCM_LOOP) 1573 mcr &= ~MCR_LOOPBACK; 1574 1575 if (set & TIOCM_RTS) 1576 mcr |= MCR_RTS; 1577 if (set & TIOCM_DTR) 1578 mcr |= MCR_DTR; 1579 if (set & TIOCM_LOOP) 1580 mcr |= MCR_LOOPBACK; 1581 1582 mos7840_port->shadowMCR = mcr; 1583 1584 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1585 if (status < 0) { 1586 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); 1587 return status; 1588 } 1589 1590 return 0; 1591 } 1592 1593 /***************************************************************************** 1594 * mos7840_calc_baud_rate_divisor 1595 * this function calculates the proper baud rate divisor for the specified 1596 * baud rate. 1597 *****************************************************************************/ 1598 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, 1599 int baudRate, int *divisor, 1600 __u16 *clk_sel_val) 1601 { 1602 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); 1603 1604 if (baudRate <= 115200) { 1605 *divisor = 115200 / baudRate; 1606 *clk_sel_val = 0x0; 1607 } 1608 if ((baudRate > 115200) && (baudRate <= 230400)) { 1609 *divisor = 230400 / baudRate; 1610 *clk_sel_val = 0x10; 1611 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1612 *divisor = 403200 / baudRate; 1613 *clk_sel_val = 0x20; 1614 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1615 *divisor = 460800 / baudRate; 1616 *clk_sel_val = 0x30; 1617 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1618 *divisor = 806400 / baudRate; 1619 *clk_sel_val = 0x40; 1620 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1621 *divisor = 921600 / baudRate; 1622 *clk_sel_val = 0x50; 1623 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1624 *divisor = 1572864 / baudRate; 1625 *clk_sel_val = 0x60; 1626 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1627 *divisor = 3145728 / baudRate; 1628 *clk_sel_val = 0x70; 1629 } 1630 return 0; 1631 1632 #ifdef NOTMCS7840 1633 1634 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1635 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1636 *divisor = mos7840_divisor_table[i].Divisor; 1637 return 0; 1638 } 1639 } 1640 1641 /* After trying for all the standard baud rates * 1642 * Try calculating the divisor for this baud rate */ 1643 1644 if (baudrate > 75 && baudrate < 230400) { 1645 /* get the divisor */ 1646 custom = (__u16) (230400L / baudrate); 1647 1648 /* Check for round off */ 1649 round1 = (__u16) (2304000L / baudrate); 1650 round = (__u16) (round1 - (custom * 10)); 1651 if (round > 4) 1652 custom++; 1653 *divisor = custom; 1654 1655 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom); 1656 return 0; 1657 } 1658 1659 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n"); 1660 return -1; 1661 #endif 1662 } 1663 1664 /***************************************************************************** 1665 * mos7840_send_cmd_write_baud_rate 1666 * this function sends the proper command to change the baud rate of the 1667 * specified port. 1668 *****************************************************************************/ 1669 1670 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1671 int baudRate) 1672 { 1673 int divisor = 0; 1674 int status; 1675 __u16 Data; 1676 unsigned char number; 1677 __u16 clk_sel_val; 1678 struct usb_serial_port *port; 1679 1680 if (mos7840_port == NULL) 1681 return -1; 1682 1683 port = mos7840_port->port; 1684 if (mos7840_port_paranoia_check(port, __func__)) 1685 return -1; 1686 1687 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1688 return -1; 1689 1690 number = mos7840_port->port->port_number; 1691 1692 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate); 1693 /* reset clk_uart_sel in spregOffset */ 1694 if (baudRate > 115200) { 1695 #ifdef HW_flow_control 1696 /* NOTE: need to see the pther register to modify */ 1697 /* setting h/w flow control bit to 1 */ 1698 Data = 0x2b; 1699 mos7840_port->shadowMCR = Data; 1700 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1701 Data); 1702 if (status < 0) { 1703 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1704 return -1; 1705 } 1706 #endif 1707 1708 } else { 1709 #ifdef HW_flow_control 1710 /* setting h/w flow control bit to 0 */ 1711 Data = 0xb; 1712 mos7840_port->shadowMCR = Data; 1713 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1714 Data); 1715 if (status < 0) { 1716 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1717 return -1; 1718 } 1719 #endif 1720 1721 } 1722 1723 if (1) { /* baudRate <= 115200) */ 1724 clk_sel_val = 0x0; 1725 Data = 0x0; 1726 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, 1727 &clk_sel_val); 1728 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1729 &Data); 1730 if (status < 0) { 1731 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); 1732 return -1; 1733 } 1734 Data = (Data & 0x8f) | clk_sel_val; 1735 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1736 Data); 1737 if (status < 0) { 1738 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1739 return -1; 1740 } 1741 /* Calculate the Divisor */ 1742 1743 if (status) { 1744 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1745 return status; 1746 } 1747 /* Enable access to divisor latch */ 1748 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1749 mos7840_port->shadowLCR = Data; 1750 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1751 1752 /* Write the divisor */ 1753 Data = (unsigned char)(divisor & 0xff); 1754 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); 1755 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1756 1757 Data = (unsigned char)((divisor & 0xff00) >> 8); 1758 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); 1759 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1760 1761 /* Disable access to divisor latch */ 1762 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1763 mos7840_port->shadowLCR = Data; 1764 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1765 1766 } 1767 return status; 1768 } 1769 1770 /***************************************************************************** 1771 * mos7840_change_port_settings 1772 * This routine is called to set the UART on the device to match 1773 * the specified new settings. 1774 *****************************************************************************/ 1775 1776 static void mos7840_change_port_settings(struct tty_struct *tty, 1777 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1778 { 1779 int baud; 1780 unsigned cflag; 1781 unsigned iflag; 1782 __u8 lData; 1783 __u8 lParity; 1784 __u8 lStop; 1785 int status; 1786 __u16 Data; 1787 struct usb_serial_port *port; 1788 struct usb_serial *serial; 1789 1790 if (mos7840_port == NULL) 1791 return; 1792 1793 port = mos7840_port->port; 1794 1795 if (mos7840_port_paranoia_check(port, __func__)) 1796 return; 1797 1798 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1799 return; 1800 1801 serial = port->serial; 1802 1803 if (!mos7840_port->open) { 1804 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1805 return; 1806 } 1807 1808 lData = LCR_BITS_8; 1809 lStop = LCR_STOP_1; 1810 lParity = LCR_PAR_NONE; 1811 1812 cflag = tty->termios.c_cflag; 1813 iflag = tty->termios.c_iflag; 1814 1815 /* Change the number of bits */ 1816 switch (cflag & CSIZE) { 1817 case CS5: 1818 lData = LCR_BITS_5; 1819 break; 1820 1821 case CS6: 1822 lData = LCR_BITS_6; 1823 break; 1824 1825 case CS7: 1826 lData = LCR_BITS_7; 1827 break; 1828 1829 default: 1830 case CS8: 1831 lData = LCR_BITS_8; 1832 break; 1833 } 1834 1835 /* Change the Parity bit */ 1836 if (cflag & PARENB) { 1837 if (cflag & PARODD) { 1838 lParity = LCR_PAR_ODD; 1839 dev_dbg(&port->dev, "%s - parity = odd\n", __func__); 1840 } else { 1841 lParity = LCR_PAR_EVEN; 1842 dev_dbg(&port->dev, "%s - parity = even\n", __func__); 1843 } 1844 1845 } else { 1846 dev_dbg(&port->dev, "%s - parity = none\n", __func__); 1847 } 1848 1849 if (cflag & CMSPAR) 1850 lParity = lParity | 0x20; 1851 1852 /* Change the Stop bit */ 1853 if (cflag & CSTOPB) { 1854 lStop = LCR_STOP_2; 1855 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); 1856 } else { 1857 lStop = LCR_STOP_1; 1858 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); 1859 } 1860 1861 /* Update the LCR with the correct value */ 1862 mos7840_port->shadowLCR &= 1863 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1864 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1865 1866 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, 1867 mos7840_port->shadowLCR); 1868 /* Disable Interrupts */ 1869 Data = 0x00; 1870 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1871 1872 Data = 0x00; 1873 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1874 1875 Data = 0xcf; 1876 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1877 1878 /* Send the updated LCR value to the mos7840 */ 1879 Data = mos7840_port->shadowLCR; 1880 1881 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1882 1883 Data = 0x00b; 1884 mos7840_port->shadowMCR = Data; 1885 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1886 Data = 0x00b; 1887 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1888 1889 /* set up the MCR register and send it to the mos7840 */ 1890 1891 mos7840_port->shadowMCR = MCR_MASTER_IE; 1892 if (cflag & CBAUD) 1893 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1894 1895 if (cflag & CRTSCTS) 1896 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1897 else 1898 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 1899 1900 Data = mos7840_port->shadowMCR; 1901 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1902 1903 /* Determine divisor based on baud rate */ 1904 baud = tty_get_baud_rate(tty); 1905 1906 if (!baud) { 1907 /* pick a default, any default... */ 1908 dev_dbg(&port->dev, "%s", "Picked default baud...\n"); 1909 baud = 9600; 1910 } 1911 1912 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); 1913 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 1914 1915 /* Enable Interrupts */ 1916 Data = 0x0c; 1917 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1918 1919 if (mos7840_port->read_urb_busy == false) { 1920 mos7840_port->read_urb_busy = true; 1921 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 1922 if (status) { 1923 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1924 status); 1925 mos7840_port->read_urb_busy = false; 1926 } 1927 } 1928 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, 1929 mos7840_port->shadowLCR); 1930 } 1931 1932 /***************************************************************************** 1933 * mos7840_set_termios 1934 * this function is called by the tty driver when it wants to change 1935 * the termios structure 1936 *****************************************************************************/ 1937 1938 static void mos7840_set_termios(struct tty_struct *tty, 1939 struct usb_serial_port *port, 1940 struct ktermios *old_termios) 1941 { 1942 int status; 1943 unsigned int cflag; 1944 struct usb_serial *serial; 1945 struct moschip_port *mos7840_port; 1946 1947 if (mos7840_port_paranoia_check(port, __func__)) 1948 return; 1949 1950 serial = port->serial; 1951 1952 if (mos7840_serial_paranoia_check(serial, __func__)) 1953 return; 1954 1955 mos7840_port = mos7840_get_port_private(port); 1956 1957 if (mos7840_port == NULL) 1958 return; 1959 1960 if (!mos7840_port->open) { 1961 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1962 return; 1963 } 1964 1965 dev_dbg(&port->dev, "%s", "setting termios - \n"); 1966 1967 cflag = tty->termios.c_cflag; 1968 1969 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, 1970 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); 1971 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, 1972 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 1973 1974 /* change the port settings to the new ones specified */ 1975 1976 mos7840_change_port_settings(tty, mos7840_port, old_termios); 1977 1978 if (!mos7840_port->read_urb) { 1979 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n"); 1980 return; 1981 } 1982 1983 if (mos7840_port->read_urb_busy == false) { 1984 mos7840_port->read_urb_busy = true; 1985 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 1986 if (status) { 1987 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1988 status); 1989 mos7840_port->read_urb_busy = false; 1990 } 1991 } 1992 } 1993 1994 /***************************************************************************** 1995 * mos7840_get_lsr_info - get line status register info 1996 * 1997 * Purpose: Let user call ioctl() to get info when the UART physically 1998 * is emptied. On bus types like RS485, the transmitter must 1999 * release the bus after transmitting. This must be done when 2000 * the transmit shift register is empty, not be done when the 2001 * transmit holding register is empty. This functionality 2002 * allows an RS485 driver to be written in user space. 2003 *****************************************************************************/ 2004 2005 static int mos7840_get_lsr_info(struct tty_struct *tty, 2006 unsigned int __user *value) 2007 { 2008 int count; 2009 unsigned int result = 0; 2010 2011 count = mos7840_chars_in_buffer(tty); 2012 if (count == 0) 2013 result = TIOCSER_TEMT; 2014 2015 if (copy_to_user(value, &result, sizeof(int))) 2016 return -EFAULT; 2017 return 0; 2018 } 2019 2020 /***************************************************************************** 2021 * mos7840_get_serial_info 2022 * function to get information about serial port 2023 *****************************************************************************/ 2024 2025 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2026 struct serial_struct __user *retinfo) 2027 { 2028 struct serial_struct tmp; 2029 2030 if (mos7840_port == NULL) 2031 return -1; 2032 2033 if (!retinfo) 2034 return -EFAULT; 2035 2036 memset(&tmp, 0, sizeof(tmp)); 2037 2038 tmp.type = PORT_16550A; 2039 tmp.line = mos7840_port->port->minor; 2040 tmp.port = mos7840_port->port->port_number; 2041 tmp.irq = 0; 2042 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2043 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2044 tmp.baud_base = 9600; 2045 tmp.close_delay = 5 * HZ; 2046 tmp.closing_wait = 30 * HZ; 2047 2048 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2049 return -EFAULT; 2050 return 0; 2051 } 2052 2053 /***************************************************************************** 2054 * SerialIoctl 2055 * this function handles any ioctl calls to the driver 2056 *****************************************************************************/ 2057 2058 static int mos7840_ioctl(struct tty_struct *tty, 2059 unsigned int cmd, unsigned long arg) 2060 { 2061 struct usb_serial_port *port = tty->driver_data; 2062 void __user *argp = (void __user *)arg; 2063 struct moschip_port *mos7840_port; 2064 2065 if (mos7840_port_paranoia_check(port, __func__)) 2066 return -1; 2067 2068 mos7840_port = mos7840_get_port_private(port); 2069 2070 if (mos7840_port == NULL) 2071 return -1; 2072 2073 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd); 2074 2075 switch (cmd) { 2076 /* return number of bytes available */ 2077 2078 case TIOCSERGETLSR: 2079 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 2080 return mos7840_get_lsr_info(tty, argp); 2081 2082 case TIOCGSERIAL: 2083 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); 2084 return mos7840_get_serial_info(mos7840_port, argp); 2085 2086 case TIOCSSERIAL: 2087 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__); 2088 break; 2089 default: 2090 break; 2091 } 2092 return -ENOIOCTLCMD; 2093 } 2094 2095 static int mos7810_check(struct usb_serial *serial) 2096 { 2097 int i, pass_count = 0; 2098 u8 *buf; 2099 __u16 data = 0, mcr_data = 0; 2100 __u16 test_pattern = 0x55AA; 2101 int res; 2102 2103 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2104 if (!buf) 2105 return 0; /* failed to identify 7810 */ 2106 2107 /* Store MCR setting */ 2108 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2109 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, 2110 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2111 if (res == VENDOR_READ_LENGTH) 2112 mcr_data = *buf; 2113 2114 for (i = 0; i < 16; i++) { 2115 /* Send the 1-bit test pattern out to MCS7810 test pin */ 2116 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2117 MCS_WRREQ, MCS_WR_RTYPE, 2118 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), 2119 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); 2120 2121 /* Read the test pattern back */ 2122 res = usb_control_msg(serial->dev, 2123 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, 2124 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2125 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2126 if (res == VENDOR_READ_LENGTH) 2127 data = *buf; 2128 2129 /* If this is a MCS7810 device, both test patterns must match */ 2130 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) 2131 break; 2132 2133 pass_count++; 2134 } 2135 2136 /* Restore MCR setting */ 2137 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, 2138 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 2139 0, MOS_WDR_TIMEOUT); 2140 2141 kfree(buf); 2142 2143 if (pass_count == 16) 2144 return 1; 2145 2146 return 0; 2147 } 2148 2149 static int mos7840_probe(struct usb_serial *serial, 2150 const struct usb_device_id *id) 2151 { 2152 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); 2153 u8 *buf; 2154 int device_type; 2155 2156 if (product == MOSCHIP_DEVICE_ID_7810 || 2157 product == MOSCHIP_DEVICE_ID_7820) { 2158 device_type = product; 2159 goto out; 2160 } 2161 2162 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2163 if (!buf) 2164 return -ENOMEM; 2165 2166 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2167 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2168 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2169 2170 /* For a MCS7840 device GPIO0 must be set to 1 */ 2171 if (buf[0] & 0x01) 2172 device_type = MOSCHIP_DEVICE_ID_7840; 2173 else if (mos7810_check(serial)) 2174 device_type = MOSCHIP_DEVICE_ID_7810; 2175 else 2176 device_type = MOSCHIP_DEVICE_ID_7820; 2177 2178 kfree(buf); 2179 out: 2180 usb_set_serial_data(serial, (void *)(unsigned long)device_type); 2181 2182 return 0; 2183 } 2184 2185 static int mos7840_calc_num_ports(struct usb_serial *serial) 2186 { 2187 int device_type = (unsigned long)usb_get_serial_data(serial); 2188 int mos7840_num_ports; 2189 2190 mos7840_num_ports = (device_type >> 4) & 0x000F; 2191 2192 return mos7840_num_ports; 2193 } 2194 2195 static int mos7840_port_probe(struct usb_serial_port *port) 2196 { 2197 struct usb_serial *serial = port->serial; 2198 int device_type = (unsigned long)usb_get_serial_data(serial); 2199 struct moschip_port *mos7840_port; 2200 int status; 2201 int pnum; 2202 __u16 Data; 2203 2204 /* we set up the pointers to the endpoints in the mos7840_open * 2205 * function, as the structures aren't created yet. */ 2206 2207 pnum = port->port_number; 2208 2209 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); 2210 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2211 if (mos7840_port == NULL) { 2212 dev_err(&port->dev, "%s - Out of memory\n", __func__); 2213 return -ENOMEM; 2214 } 2215 2216 /* Initialize all port interrupt end point to port 0 int 2217 * endpoint. Our device has only one interrupt end point 2218 * common to all port */ 2219 2220 mos7840_port->port = port; 2221 mos7840_set_port_private(port, mos7840_port); 2222 spin_lock_init(&mos7840_port->pool_lock); 2223 2224 /* minor is not initialised until later by 2225 * usb-serial.c:get_free_serial() and cannot therefore be used 2226 * to index device instances */ 2227 mos7840_port->port_num = pnum + 1; 2228 dev_dbg(&port->dev, "port->minor = %d\n", port->minor); 2229 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); 2230 2231 if (mos7840_port->port_num == 1) { 2232 mos7840_port->SpRegOffset = 0x0; 2233 mos7840_port->ControlRegOffset = 0x1; 2234 mos7840_port->DcrRegOffset = 0x4; 2235 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) { 2236 mos7840_port->SpRegOffset = 0x8; 2237 mos7840_port->ControlRegOffset = 0x9; 2238 mos7840_port->DcrRegOffset = 0x16; 2239 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) { 2240 mos7840_port->SpRegOffset = 0xa; 2241 mos7840_port->ControlRegOffset = 0xb; 2242 mos7840_port->DcrRegOffset = 0x19; 2243 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) { 2244 mos7840_port->SpRegOffset = 0xa; 2245 mos7840_port->ControlRegOffset = 0xb; 2246 mos7840_port->DcrRegOffset = 0x19; 2247 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) { 2248 mos7840_port->SpRegOffset = 0xc; 2249 mos7840_port->ControlRegOffset = 0xd; 2250 mos7840_port->DcrRegOffset = 0x1c; 2251 } 2252 mos7840_dump_serial_port(port, mos7840_port); 2253 mos7840_set_port_private(port, mos7840_port); 2254 2255 /* enable rx_disable bit in control register */ 2256 status = mos7840_get_reg_sync(port, 2257 mos7840_port->ControlRegOffset, &Data); 2258 if (status < 0) { 2259 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); 2260 goto out; 2261 } else 2262 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); 2263 Data |= 0x08; /* setting driver done bit */ 2264 Data |= 0x04; /* sp1_bit to have cts change reflect in 2265 modem status reg */ 2266 2267 /* Data |= 0x20; //rx_disable bit */ 2268 status = mos7840_set_reg_sync(port, 2269 mos7840_port->ControlRegOffset, Data); 2270 if (status < 0) { 2271 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2272 goto out; 2273 } else 2274 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); 2275 2276 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2277 and 0x24 in DCR3 */ 2278 Data = 0x01; 2279 status = mos7840_set_reg_sync(port, 2280 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2281 if (status < 0) { 2282 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); 2283 goto out; 2284 } else 2285 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); 2286 2287 Data = 0x05; 2288 status = mos7840_set_reg_sync(port, 2289 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2290 if (status < 0) { 2291 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); 2292 goto out; 2293 } else 2294 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); 2295 2296 Data = 0x24; 2297 status = mos7840_set_reg_sync(port, 2298 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2299 if (status < 0) { 2300 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); 2301 goto out; 2302 } else 2303 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); 2304 2305 /* write values in clkstart0x0 and clkmulti 0x20 */ 2306 Data = 0x0; 2307 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); 2308 if (status < 0) { 2309 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2310 goto out; 2311 } else 2312 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2313 2314 Data = 0x20; 2315 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); 2316 if (status < 0) { 2317 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); 2318 goto error; 2319 } else 2320 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); 2321 2322 /* write value 0x0 to scratchpad register */ 2323 Data = 0x00; 2324 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); 2325 if (status < 0) { 2326 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); 2327 goto out; 2328 } else 2329 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); 2330 2331 /* Zero Length flag register */ 2332 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { 2333 Data = 0xff; 2334 status = mos7840_set_reg_sync(port, 2335 (__u16) (ZLP_REG1 + 2336 ((__u16)mos7840_port->port_num)), Data); 2337 dev_dbg(&port->dev, "ZLIP offset %x\n", 2338 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); 2339 if (status < 0) { 2340 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); 2341 goto out; 2342 } else 2343 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); 2344 } else { 2345 Data = 0xff; 2346 status = mos7840_set_reg_sync(port, 2347 (__u16) (ZLP_REG1 + 2348 ((__u16)mos7840_port->port_num) - 0x1), Data); 2349 dev_dbg(&port->dev, "ZLIP offset %x\n", 2350 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); 2351 if (status < 0) { 2352 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); 2353 goto out; 2354 } else 2355 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); 2356 2357 } 2358 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2359 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2360 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2361 GFP_KERNEL); 2362 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2363 !mos7840_port->dr) { 2364 status = -ENOMEM; 2365 goto error; 2366 } 2367 2368 mos7840_port->has_led = false; 2369 2370 /* Initialize LED timers */ 2371 if (device_type == MOSCHIP_DEVICE_ID_7810) { 2372 mos7840_port->has_led = true; 2373 2374 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL); 2375 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr), 2376 GFP_KERNEL); 2377 if (!mos7840_port->led_urb || !mos7840_port->led_dr) { 2378 status = -ENOMEM; 2379 goto error; 2380 } 2381 2382 init_timer(&mos7840_port->led_timer1); 2383 mos7840_port->led_timer1.function = mos7840_led_off; 2384 mos7840_port->led_timer1.expires = 2385 jiffies + msecs_to_jiffies(LED_ON_MS); 2386 mos7840_port->led_timer1.data = (unsigned long)mos7840_port; 2387 2388 init_timer(&mos7840_port->led_timer2); 2389 mos7840_port->led_timer2.function = mos7840_led_flag_off; 2390 mos7840_port->led_timer2.expires = 2391 jiffies + msecs_to_jiffies(LED_OFF_MS); 2392 mos7840_port->led_timer2.data = (unsigned long)mos7840_port; 2393 2394 /* Turn off LED */ 2395 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2396 } 2397 out: 2398 if (pnum == serial->num_ports - 1) { 2399 /* Zero Length flag enable */ 2400 Data = 0x0f; 2401 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2402 if (status < 0) { 2403 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status); 2404 goto error; 2405 } else 2406 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status); 2407 2408 /* setting configuration feature to one */ 2409 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2410 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 2411 MOS_WDR_TIMEOUT); 2412 } 2413 return 0; 2414 error: 2415 kfree(mos7840_port->led_dr); 2416 usb_free_urb(mos7840_port->led_urb); 2417 kfree(mos7840_port->dr); 2418 kfree(mos7840_port->ctrl_buf); 2419 usb_free_urb(mos7840_port->control_urb); 2420 kfree(mos7840_port); 2421 2422 return status; 2423 } 2424 2425 static int mos7840_port_remove(struct usb_serial_port *port) 2426 { 2427 struct moschip_port *mos7840_port; 2428 2429 mos7840_port = mos7840_get_port_private(port); 2430 2431 if (mos7840_port->has_led) { 2432 /* Turn off LED */ 2433 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2434 2435 del_timer_sync(&mos7840_port->led_timer1); 2436 del_timer_sync(&mos7840_port->led_timer2); 2437 2438 usb_kill_urb(mos7840_port->led_urb); 2439 usb_free_urb(mos7840_port->led_urb); 2440 kfree(mos7840_port->led_dr); 2441 } 2442 usb_kill_urb(mos7840_port->control_urb); 2443 usb_free_urb(mos7840_port->control_urb); 2444 kfree(mos7840_port->ctrl_buf); 2445 kfree(mos7840_port->dr); 2446 kfree(mos7840_port); 2447 2448 return 0; 2449 } 2450 2451 static struct usb_serial_driver moschip7840_4port_device = { 2452 .driver = { 2453 .owner = THIS_MODULE, 2454 .name = "mos7840", 2455 }, 2456 .description = DRIVER_DESC, 2457 .id_table = id_table, 2458 .num_ports = 4, 2459 .open = mos7840_open, 2460 .close = mos7840_close, 2461 .write = mos7840_write, 2462 .write_room = mos7840_write_room, 2463 .chars_in_buffer = mos7840_chars_in_buffer, 2464 .throttle = mos7840_throttle, 2465 .unthrottle = mos7840_unthrottle, 2466 .calc_num_ports = mos7840_calc_num_ports, 2467 .probe = mos7840_probe, 2468 .ioctl = mos7840_ioctl, 2469 .set_termios = mos7840_set_termios, 2470 .break_ctl = mos7840_break, 2471 .tiocmget = mos7840_tiocmget, 2472 .tiocmset = mos7840_tiocmset, 2473 .tiocmiwait = usb_serial_generic_tiocmiwait, 2474 .get_icount = usb_serial_generic_get_icount, 2475 .port_probe = mos7840_port_probe, 2476 .port_remove = mos7840_port_remove, 2477 .read_bulk_callback = mos7840_bulk_in_callback, 2478 .read_int_callback = mos7840_interrupt_callback, 2479 }; 2480 2481 static struct usb_serial_driver * const serial_drivers[] = { 2482 &moschip7840_4port_device, NULL 2483 }; 2484 2485 module_usb_serial_driver(serial_drivers, id_table); 2486 2487 MODULE_DESCRIPTION(DRIVER_DESC); 2488 MODULE_LICENSE("GPL"); 2489