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 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 225 struct usb_serial_port *port; /* loop back to the owner of this object */ 226 227 /* Offsets */ 228 __u8 SpRegOffset; 229 __u8 ControlRegOffset; 230 __u8 DcrRegOffset; 231 /* for processing control URBS in interrupt context */ 232 struct urb *control_urb; 233 struct usb_ctrlrequest *dr; 234 char *ctrl_buf; 235 int MsrLsr; 236 237 spinlock_t pool_lock; 238 struct urb *write_urb_pool[NUM_URBS]; 239 char busy[NUM_URBS]; 240 bool read_urb_busy; 241 242 /* For device(s) with LED indicator */ 243 bool has_led; 244 struct timer_list led_timer1; /* Timer for LED on */ 245 struct timer_list led_timer2; /* Timer for LED off */ 246 struct urb *led_urb; 247 struct usb_ctrlrequest *led_dr; 248 249 unsigned long flags; 250 }; 251 252 /* 253 * mos7840_set_reg_sync 254 * To set the Control register by calling usb_fill_control_urb function 255 * by passing usb_sndctrlpipe function as parameter. 256 */ 257 258 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 259 __u16 val) 260 { 261 struct usb_device *dev = port->serial->dev; 262 val = val & 0x00ff; 263 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val); 264 265 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 266 MCS_WR_RTYPE, val, reg, NULL, 0, 267 MOS_WDR_TIMEOUT); 268 } 269 270 /* 271 * mos7840_get_reg_sync 272 * To set the Uart register by calling usb_fill_control_urb function by 273 * passing usb_rcvctrlpipe function as parameter. 274 */ 275 276 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 277 __u16 *val) 278 { 279 struct usb_device *dev = port->serial->dev; 280 int ret = 0; 281 u8 *buf; 282 283 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 284 if (!buf) 285 return -ENOMEM; 286 287 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 288 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, 289 MOS_WDR_TIMEOUT); 290 *val = buf[0]; 291 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val); 292 293 kfree(buf); 294 return ret; 295 } 296 297 /* 298 * mos7840_set_uart_reg 299 * To set the Uart register by calling usb_fill_control_urb function by 300 * passing usb_sndctrlpipe function as parameter. 301 */ 302 303 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 304 __u16 val) 305 { 306 307 struct usb_device *dev = port->serial->dev; 308 val = val & 0x00ff; 309 /* For the UART control registers, the application number need 310 to be Or'ed */ 311 if (port->serial->num_ports == 4) { 312 val |= ((__u16)port->port_number + 1) << 8; 313 } else { 314 if (port->port_number == 0) { 315 val |= ((__u16)port->port_number + 1) << 8; 316 } else { 317 val |= ((__u16)port->port_number + 2) << 8; 318 } 319 } 320 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val); 321 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 322 MCS_WR_RTYPE, val, reg, NULL, 0, 323 MOS_WDR_TIMEOUT); 324 325 } 326 327 /* 328 * mos7840_get_uart_reg 329 * To set the Control register by calling usb_fill_control_urb function 330 * by passing usb_rcvctrlpipe function as parameter. 331 */ 332 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 333 __u16 *val) 334 { 335 struct usb_device *dev = port->serial->dev; 336 int ret = 0; 337 __u16 Wval; 338 u8 *buf; 339 340 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 341 if (!buf) 342 return -ENOMEM; 343 344 /* Wval is same as application number */ 345 if (port->serial->num_ports == 4) { 346 Wval = ((__u16)port->port_number + 1) << 8; 347 } else { 348 if (port->port_number == 0) { 349 Wval = ((__u16)port->port_number + 1) << 8; 350 } else { 351 Wval = ((__u16)port->port_number + 2) << 8; 352 } 353 } 354 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval); 355 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 356 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, 357 MOS_WDR_TIMEOUT); 358 *val = buf[0]; 359 360 kfree(buf); 361 return ret; 362 } 363 364 static void mos7840_dump_serial_port(struct usb_serial_port *port, 365 struct moschip_port *mos7840_port) 366 { 367 368 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 369 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset); 370 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset); 371 372 } 373 374 /************************************************************************/ 375 /************************************************************************/ 376 /* I N T E R F A C E F U N C T I O N S */ 377 /* I N T E R F A C E F U N C T I O N S */ 378 /************************************************************************/ 379 /************************************************************************/ 380 381 static inline void mos7840_set_port_private(struct usb_serial_port *port, 382 struct moschip_port *data) 383 { 384 usb_set_serial_port_data(port, (void *)data); 385 } 386 387 static inline struct moschip_port *mos7840_get_port_private(struct 388 usb_serial_port 389 *port) 390 { 391 return (struct moschip_port *)usb_get_serial_port_data(port); 392 } 393 394 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 395 { 396 struct moschip_port *mos7840_port; 397 struct async_icount *icount; 398 mos7840_port = port; 399 if (new_msr & 400 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 401 MOS_MSR_DELTA_CD)) { 402 icount = &mos7840_port->port->icount; 403 404 /* update input line counters */ 405 if (new_msr & MOS_MSR_DELTA_CTS) 406 icount->cts++; 407 if (new_msr & MOS_MSR_DELTA_DSR) 408 icount->dsr++; 409 if (new_msr & MOS_MSR_DELTA_CD) 410 icount->dcd++; 411 if (new_msr & MOS_MSR_DELTA_RI) 412 icount->rng++; 413 414 wake_up_interruptible(&port->port->port.delta_msr_wait); 415 } 416 } 417 418 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 419 { 420 struct async_icount *icount; 421 422 if (new_lsr & SERIAL_LSR_BI) { 423 /* 424 * Parity and Framing errors only count if they 425 * occur exclusive of a break being 426 * received. 427 */ 428 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 429 } 430 431 /* update input line counters */ 432 icount = &port->port->icount; 433 if (new_lsr & SERIAL_LSR_BI) 434 icount->brk++; 435 if (new_lsr & SERIAL_LSR_OE) 436 icount->overrun++; 437 if (new_lsr & SERIAL_LSR_PE) 438 icount->parity++; 439 if (new_lsr & SERIAL_LSR_FE) 440 icount->frame++; 441 } 442 443 /************************************************************************/ 444 /************************************************************************/ 445 /* U S B C A L L B A C K F U N C T I O N S */ 446 /* U S B C A L L B A C K F U N C T I O N S */ 447 /************************************************************************/ 448 /************************************************************************/ 449 450 static void mos7840_control_callback(struct urb *urb) 451 { 452 unsigned char *data; 453 struct moschip_port *mos7840_port; 454 struct device *dev = &urb->dev->dev; 455 __u8 regval = 0x0; 456 int status = urb->status; 457 458 mos7840_port = urb->context; 459 460 switch (status) { 461 case 0: 462 /* success */ 463 break; 464 case -ECONNRESET: 465 case -ENOENT: 466 case -ESHUTDOWN: 467 /* this urb is terminated, clean up */ 468 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); 469 goto out; 470 default: 471 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); 472 goto out; 473 } 474 475 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length); 476 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__, 477 mos7840_port->MsrLsr, mos7840_port->port_num); 478 data = urb->transfer_buffer; 479 regval = (__u8) data[0]; 480 dev_dbg(dev, "%s data is %x\n", __func__, regval); 481 if (mos7840_port->MsrLsr == 0) 482 mos7840_handle_new_msr(mos7840_port, regval); 483 else if (mos7840_port->MsrLsr == 1) 484 mos7840_handle_new_lsr(mos7840_port, regval); 485 out: 486 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags); 487 } 488 489 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 490 __u16 *val) 491 { 492 struct usb_device *dev = mcs->port->serial->dev; 493 struct usb_ctrlrequest *dr = mcs->dr; 494 unsigned char *buffer = mcs->ctrl_buf; 495 int ret; 496 497 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags)) 498 return -EBUSY; 499 500 dr->bRequestType = MCS_RD_RTYPE; 501 dr->bRequest = MCS_RDREQ; 502 dr->wValue = cpu_to_le16(Wval); /* 0 */ 503 dr->wIndex = cpu_to_le16(reg); 504 dr->wLength = cpu_to_le16(2); 505 506 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 507 (unsigned char *)dr, buffer, 2, 508 mos7840_control_callback, mcs); 509 mcs->control_urb->transfer_buffer_length = 2; 510 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 511 if (ret) 512 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags); 513 514 return ret; 515 } 516 517 static void mos7840_set_led_callback(struct urb *urb) 518 { 519 switch (urb->status) { 520 case 0: 521 /* Success */ 522 break; 523 case -ECONNRESET: 524 case -ENOENT: 525 case -ESHUTDOWN: 526 /* This urb is terminated, clean up */ 527 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d", 528 __func__, urb->status); 529 break; 530 default: 531 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d", 532 __func__, urb->status); 533 } 534 } 535 536 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, 537 __u16 reg) 538 { 539 struct usb_device *dev = mcs->port->serial->dev; 540 struct usb_ctrlrequest *dr = mcs->led_dr; 541 542 dr->bRequestType = MCS_WR_RTYPE; 543 dr->bRequest = MCS_WRREQ; 544 dr->wValue = cpu_to_le16(wval); 545 dr->wIndex = cpu_to_le16(reg); 546 dr->wLength = cpu_to_le16(0); 547 548 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0), 549 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL); 550 551 usb_submit_urb(mcs->led_urb, GFP_ATOMIC); 552 } 553 554 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, 555 __u16 val) 556 { 557 struct usb_device *dev = port->serial->dev; 558 559 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, 560 val, reg, NULL, 0, MOS_WDR_TIMEOUT); 561 } 562 563 static void mos7840_led_off(unsigned long arg) 564 { 565 struct moschip_port *mcs = (struct moschip_port *) arg; 566 567 /* Turn off LED */ 568 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER); 569 mod_timer(&mcs->led_timer2, 570 jiffies + msecs_to_jiffies(LED_OFF_MS)); 571 } 572 573 static void mos7840_led_flag_off(unsigned long arg) 574 { 575 struct moschip_port *mcs = (struct moschip_port *) arg; 576 577 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags); 578 } 579 580 static void mos7840_led_activity(struct usb_serial_port *port) 581 { 582 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 583 584 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags)) 585 return; 586 587 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER); 588 mod_timer(&mos7840_port->led_timer1, 589 jiffies + msecs_to_jiffies(LED_ON_MS)); 590 } 591 592 /***************************************************************************** 593 * mos7840_interrupt_callback 594 * this is the callback function for when we have received data on the 595 * interrupt endpoint. 596 *****************************************************************************/ 597 598 static void mos7840_interrupt_callback(struct urb *urb) 599 { 600 int result; 601 int length; 602 struct moschip_port *mos7840_port; 603 struct usb_serial *serial; 604 __u16 Data; 605 unsigned char *data; 606 __u8 sp[5], st; 607 int i, rv = 0; 608 __u16 wval, wreg = 0; 609 int status = urb->status; 610 611 switch (status) { 612 case 0: 613 /* success */ 614 break; 615 case -ECONNRESET: 616 case -ENOENT: 617 case -ESHUTDOWN: 618 /* this urb is terminated, clean up */ 619 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 620 __func__, status); 621 return; 622 default: 623 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", 624 __func__, status); 625 goto exit; 626 } 627 628 length = urb->actual_length; 629 data = urb->transfer_buffer; 630 631 serial = urb->context; 632 633 /* Moschip get 5 bytes 634 * Byte 1 IIR Port 1 (port.number is 0) 635 * Byte 2 IIR Port 2 (port.number is 1) 636 * Byte 3 IIR Port 3 (port.number is 2) 637 * Byte 4 IIR Port 4 (port.number is 3) 638 * Byte 5 FIFO status for both */ 639 640 if (length && length > 5) { 641 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n"); 642 return; 643 } 644 645 sp[0] = (__u8) data[0]; 646 sp[1] = (__u8) data[1]; 647 sp[2] = (__u8) data[2]; 648 sp[3] = (__u8) data[3]; 649 st = (__u8) data[4]; 650 651 for (i = 0; i < serial->num_ports; i++) { 652 mos7840_port = mos7840_get_port_private(serial->port[i]); 653 wval = ((__u16)serial->port[i]->port_number + 1) << 8; 654 if (mos7840_port->open) { 655 if (sp[i] & 0x01) { 656 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i); 657 } else { 658 switch (sp[i] & 0x0f) { 659 case SERIAL_IIR_RLS: 660 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i); 661 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n"); 662 mos7840_port->MsrLsr = 1; 663 wreg = LINE_STATUS_REGISTER; 664 break; 665 case SERIAL_IIR_MS: 666 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i); 667 mos7840_port->MsrLsr = 0; 668 wreg = MODEM_STATUS_REGISTER; 669 break; 670 } 671 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 672 } 673 } 674 } 675 if (!(rv < 0)) 676 /* the completion handler for the control urb will resubmit */ 677 return; 678 exit: 679 result = usb_submit_urb(urb, GFP_ATOMIC); 680 if (result) { 681 dev_err(&urb->dev->dev, 682 "%s - Error %d submitting interrupt urb\n", 683 __func__, result); 684 } 685 } 686 687 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 688 const char *function) 689 { 690 if (!port) { 691 pr_debug("%s - port == NULL\n", function); 692 return -1; 693 } 694 if (!port->serial) { 695 pr_debug("%s - port->serial == NULL\n", function); 696 return -1; 697 } 698 699 return 0; 700 } 701 702 /* Inline functions to check the sanity of a pointer that is passed to us */ 703 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 704 const char *function) 705 { 706 if (!serial) { 707 pr_debug("%s - serial == NULL\n", function); 708 return -1; 709 } 710 if (!serial->type) { 711 pr_debug("%s - serial->type == NULL!\n", function); 712 return -1; 713 } 714 715 return 0; 716 } 717 718 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 719 const char *function) 720 { 721 /* if no port was specified, or it fails a paranoia check */ 722 if (!port || 723 mos7840_port_paranoia_check(port, function) || 724 mos7840_serial_paranoia_check(port->serial, function)) { 725 /* then say that we don't have a valid usb_serial thing, 726 * which will end up genrating -ENODEV return values */ 727 return NULL; 728 } 729 730 return port->serial; 731 } 732 733 /***************************************************************************** 734 * mos7840_bulk_in_callback 735 * this is the callback function for when we have received data on the 736 * bulk in endpoint. 737 *****************************************************************************/ 738 739 static void mos7840_bulk_in_callback(struct urb *urb) 740 { 741 int retval; 742 unsigned char *data; 743 struct usb_serial *serial; 744 struct usb_serial_port *port; 745 struct moschip_port *mos7840_port; 746 int status = urb->status; 747 748 mos7840_port = urb->context; 749 if (!mos7840_port) 750 return; 751 752 if (status) { 753 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); 754 mos7840_port->read_urb_busy = false; 755 return; 756 } 757 758 port = mos7840_port->port; 759 if (mos7840_port_paranoia_check(port, __func__)) { 760 mos7840_port->read_urb_busy = false; 761 return; 762 } 763 764 serial = mos7840_get_usb_serial(port, __func__); 765 if (!serial) { 766 mos7840_port->read_urb_busy = false; 767 return; 768 } 769 770 data = urb->transfer_buffer; 771 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); 772 773 if (urb->actual_length) { 774 struct tty_port *tport = &mos7840_port->port->port; 775 tty_insert_flip_string(tport, data, urb->actual_length); 776 tty_flip_buffer_push(tport); 777 port->icount.rx += urb->actual_length; 778 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx); 779 } 780 781 if (!mos7840_port->read_urb) { 782 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n"); 783 mos7840_port->read_urb_busy = false; 784 return; 785 } 786 787 if (mos7840_port->has_led) 788 mos7840_led_activity(port); 789 790 mos7840_port->read_urb_busy = true; 791 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 792 793 if (retval) { 794 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); 795 mos7840_port->read_urb_busy = false; 796 } 797 } 798 799 /***************************************************************************** 800 * mos7840_bulk_out_data_callback 801 * this is the callback function for when we have finished sending 802 * serial data on the bulk out endpoint. 803 *****************************************************************************/ 804 805 static void mos7840_bulk_out_data_callback(struct urb *urb) 806 { 807 struct moschip_port *mos7840_port; 808 struct usb_serial_port *port; 809 int status = urb->status; 810 int i; 811 812 mos7840_port = urb->context; 813 port = mos7840_port->port; 814 spin_lock(&mos7840_port->pool_lock); 815 for (i = 0; i < NUM_URBS; i++) { 816 if (urb == mos7840_port->write_urb_pool[i]) { 817 mos7840_port->busy[i] = 0; 818 break; 819 } 820 } 821 spin_unlock(&mos7840_port->pool_lock); 822 823 if (status) { 824 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status); 825 return; 826 } 827 828 if (mos7840_port_paranoia_check(port, __func__)) 829 return; 830 831 if (mos7840_port->open) 832 tty_port_tty_wakeup(&port->port); 833 834 } 835 836 /************************************************************************/ 837 /* 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 */ 838 /************************************************************************/ 839 840 /***************************************************************************** 841 * mos7840_open 842 * this function is called by the tty driver when a port is opened 843 * If successful, we return 0 844 * Otherwise we return a negative error number. 845 *****************************************************************************/ 846 847 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 848 { 849 int response; 850 int j; 851 struct usb_serial *serial; 852 struct urb *urb; 853 __u16 Data; 854 int status; 855 struct moschip_port *mos7840_port; 856 struct moschip_port *port0; 857 858 if (mos7840_port_paranoia_check(port, __func__)) 859 return -ENODEV; 860 861 serial = port->serial; 862 863 if (mos7840_serial_paranoia_check(serial, __func__)) 864 return -ENODEV; 865 866 mos7840_port = mos7840_get_port_private(port); 867 port0 = mos7840_get_port_private(serial->port[0]); 868 869 if (mos7840_port == NULL || port0 == NULL) 870 return -ENODEV; 871 872 usb_clear_halt(serial->dev, port->write_urb->pipe); 873 usb_clear_halt(serial->dev, port->read_urb->pipe); 874 port0->open_ports++; 875 876 /* Initialising the write urb pool */ 877 for (j = 0; j < NUM_URBS; ++j) { 878 urb = usb_alloc_urb(0, GFP_KERNEL); 879 mos7840_port->write_urb_pool[j] = urb; 880 881 if (urb == NULL) { 882 dev_err(&port->dev, "No more urbs???\n"); 883 continue; 884 } 885 886 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 887 GFP_KERNEL); 888 if (!urb->transfer_buffer) { 889 usb_free_urb(urb); 890 mos7840_port->write_urb_pool[j] = NULL; 891 dev_err(&port->dev, 892 "%s-out of memory for urb buffers.\n", 893 __func__); 894 continue; 895 } 896 } 897 898 /***************************************************************************** 899 * Initialize MCS7840 -- Write Init values to corresponding Registers 900 * 901 * Register Index 902 * 1 : IER 903 * 2 : FCR 904 * 3 : LCR 905 * 4 : MCR 906 * 907 * 0x08 : SP1/2 Control Reg 908 *****************************************************************************/ 909 910 /* NEED to check the following Block */ 911 912 Data = 0x0; 913 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 914 if (status < 0) { 915 dev_dbg(&port->dev, "Reading Spreg failed\n"); 916 goto err; 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 } 924 925 Data &= ~0x80; 926 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 927 if (status < 0) { 928 dev_dbg(&port->dev, "writing Spreg failed\n"); 929 goto err; 930 } 931 /* End of block to be checked */ 932 933 Data = 0x0; 934 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 935 &Data); 936 if (status < 0) { 937 dev_dbg(&port->dev, "Reading Controlreg failed\n"); 938 goto err; 939 } 940 Data |= 0x08; /* Driver done bit */ 941 Data |= 0x20; /* rx_disable */ 942 status = mos7840_set_reg_sync(port, 943 mos7840_port->ControlRegOffset, Data); 944 if (status < 0) { 945 dev_dbg(&port->dev, "writing Controlreg failed\n"); 946 goto err; 947 } 948 /* do register settings here */ 949 /* Set all regs to the device default values. */ 950 /*********************************** 951 * First Disable all interrupts. 952 ***********************************/ 953 Data = 0x00; 954 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 955 if (status < 0) { 956 dev_dbg(&port->dev, "disabling interrupts failed\n"); 957 goto err; 958 } 959 /* Set FIFO_CONTROL_REGISTER to the default value */ 960 Data = 0x00; 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 = 0xcf; 968 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 969 if (status < 0) { 970 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 971 goto err; 972 } 973 974 Data = 0x03; 975 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 976 mos7840_port->shadowLCR = Data; 977 978 Data = 0x0b; 979 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 980 mos7840_port->shadowMCR = Data; 981 982 Data = 0x00; 983 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 984 mos7840_port->shadowLCR = Data; 985 986 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 987 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 988 989 Data = 0x0c; 990 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 991 992 Data = 0x0; 993 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 994 995 Data = 0x00; 996 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 997 998 Data = Data & ~SERIAL_LCR_DLAB; 999 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1000 mos7840_port->shadowLCR = Data; 1001 1002 /* clearing Bulkin and Bulkout Fifo */ 1003 Data = 0x0; 1004 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 1005 1006 Data = Data | 0x0c; 1007 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1008 1009 Data = Data & ~0x0c; 1010 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1011 /* Finally enable all interrupts */ 1012 Data = 0x0c; 1013 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1014 1015 /* clearing rx_disable */ 1016 Data = 0x0; 1017 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1018 &Data); 1019 Data = Data & ~0x20; 1020 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1021 Data); 1022 1023 /* rx_negate */ 1024 Data = 0x0; 1025 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1026 &Data); 1027 Data = Data | 0x10; 1028 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1029 Data); 1030 1031 /* Check to see if we've set up our endpoint info yet * 1032 * (can't set it up in mos7840_startup as the structures * 1033 * were not set up at that time.) */ 1034 if (port0->open_ports == 1) { 1035 if (serial->port[0]->interrupt_in_buffer == NULL) { 1036 /* set up interrupt urb */ 1037 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1038 serial->dev, 1039 usb_rcvintpipe(serial->dev, 1040 serial->port[0]->interrupt_in_endpointAddress), 1041 serial->port[0]->interrupt_in_buffer, 1042 serial->port[0]->interrupt_in_urb-> 1043 transfer_buffer_length, 1044 mos7840_interrupt_callback, 1045 serial, 1046 serial->port[0]->interrupt_in_urb->interval); 1047 1048 /* start interrupt read for mos7840 * 1049 * will continue as long as mos7840 is connected */ 1050 1051 response = 1052 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1053 GFP_KERNEL); 1054 if (response) { 1055 dev_err(&port->dev, "%s - Error %d submitting " 1056 "interrupt urb\n", __func__, response); 1057 } 1058 1059 } 1060 1061 } 1062 1063 /* see if we've set up our endpoint info yet * 1064 * (can't set it up in mos7840_startup as the * 1065 * structures were not set up at that time.) */ 1066 1067 dev_dbg(&port->dev, "port number is %d\n", port->port_number); 1068 dev_dbg(&port->dev, "minor number is %d\n", port->minor); 1069 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress); 1070 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress); 1071 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress); 1072 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num); 1073 mos7840_port->read_urb = port->read_urb; 1074 1075 /* set up our bulk in urb */ 1076 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1077 usb_fill_bulk_urb(mos7840_port->read_urb, 1078 serial->dev, 1079 usb_rcvbulkpipe(serial->dev, 1080 (port->bulk_in_endpointAddress) + 2), 1081 port->bulk_in_buffer, 1082 mos7840_port->read_urb->transfer_buffer_length, 1083 mos7840_bulk_in_callback, mos7840_port); 1084 } else { 1085 usb_fill_bulk_urb(mos7840_port->read_urb, 1086 serial->dev, 1087 usb_rcvbulkpipe(serial->dev, 1088 port->bulk_in_endpointAddress), 1089 port->bulk_in_buffer, 1090 mos7840_port->read_urb->transfer_buffer_length, 1091 mos7840_bulk_in_callback, mos7840_port); 1092 } 1093 1094 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress); 1095 mos7840_port->read_urb_busy = true; 1096 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1097 if (response) { 1098 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1099 __func__, response); 1100 mos7840_port->read_urb_busy = false; 1101 } 1102 1103 /* initialize our wait queues */ 1104 init_waitqueue_head(&mos7840_port->wait_chase); 1105 1106 /* initialize our port settings */ 1107 /* Must set to enable ints! */ 1108 mos7840_port->shadowMCR = MCR_MASTER_IE; 1109 /* send a open port command */ 1110 mos7840_port->open = 1; 1111 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1112 1113 return 0; 1114 err: 1115 for (j = 0; j < NUM_URBS; ++j) { 1116 urb = mos7840_port->write_urb_pool[j]; 1117 if (!urb) 1118 continue; 1119 kfree(urb->transfer_buffer); 1120 usb_free_urb(urb); 1121 } 1122 return status; 1123 } 1124 1125 /***************************************************************************** 1126 * mos7840_chars_in_buffer 1127 * this function is called by the tty driver when it wants to know how many 1128 * bytes of data we currently have outstanding in the port (data that has 1129 * been written, but hasn't made it out the port yet) 1130 * If successful, we return the number of bytes left to be written in the 1131 * system, 1132 * Otherwise we return zero. 1133 *****************************************************************************/ 1134 1135 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1136 { 1137 struct usb_serial_port *port = tty->driver_data; 1138 int i; 1139 int chars = 0; 1140 unsigned long flags; 1141 struct moschip_port *mos7840_port; 1142 1143 if (mos7840_port_paranoia_check(port, __func__)) 1144 return 0; 1145 1146 mos7840_port = mos7840_get_port_private(port); 1147 if (mos7840_port == NULL) 1148 return 0; 1149 1150 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1151 for (i = 0; i < NUM_URBS; ++i) { 1152 if (mos7840_port->busy[i]) { 1153 struct urb *urb = mos7840_port->write_urb_pool[i]; 1154 chars += urb->transfer_buffer_length; 1155 } 1156 } 1157 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1158 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 1159 return chars; 1160 1161 } 1162 1163 /***************************************************************************** 1164 * mos7840_close 1165 * this function is called by the tty driver when a port is closed 1166 *****************************************************************************/ 1167 1168 static void mos7840_close(struct usb_serial_port *port) 1169 { 1170 struct usb_serial *serial; 1171 struct moschip_port *mos7840_port; 1172 struct moschip_port *port0; 1173 int j; 1174 __u16 Data; 1175 1176 if (mos7840_port_paranoia_check(port, __func__)) 1177 return; 1178 1179 serial = mos7840_get_usb_serial(port, __func__); 1180 if (!serial) 1181 return; 1182 1183 mos7840_port = mos7840_get_port_private(port); 1184 port0 = mos7840_get_port_private(serial->port[0]); 1185 1186 if (mos7840_port == NULL || port0 == NULL) 1187 return; 1188 1189 for (j = 0; j < NUM_URBS; ++j) 1190 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1191 1192 /* Freeing Write URBs */ 1193 for (j = 0; j < NUM_URBS; ++j) { 1194 if (mos7840_port->write_urb_pool[j]) { 1195 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1196 kfree(mos7840_port->write_urb_pool[j]-> 1197 transfer_buffer); 1198 1199 usb_free_urb(mos7840_port->write_urb_pool[j]); 1200 } 1201 } 1202 1203 usb_kill_urb(mos7840_port->write_urb); 1204 usb_kill_urb(mos7840_port->read_urb); 1205 mos7840_port->read_urb_busy = false; 1206 1207 port0->open_ports--; 1208 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports); 1209 if (port0->open_ports == 0) { 1210 if (serial->port[0]->interrupt_in_urb) { 1211 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n"); 1212 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1213 } 1214 } 1215 1216 if (mos7840_port->write_urb) { 1217 /* if this urb had a transfer buffer already (old tx) free it */ 1218 kfree(mos7840_port->write_urb->transfer_buffer); 1219 usb_free_urb(mos7840_port->write_urb); 1220 } 1221 1222 Data = 0x0; 1223 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1224 1225 Data = 0x00; 1226 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1227 1228 mos7840_port->open = 0; 1229 } 1230 1231 /************************************************************************ 1232 * 1233 * mos7840_block_until_chase_response 1234 * 1235 * This function will block the close until one of the following: 1236 * 1. Response to our Chase comes from mos7840 1237 * 2. A timeout of 10 seconds without activity has expired 1238 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1239 * 1240 ************************************************************************/ 1241 1242 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1243 struct moschip_port *mos7840_port) 1244 { 1245 int timeout = msecs_to_jiffies(1000); 1246 int wait = 10; 1247 int count; 1248 1249 while (1) { 1250 count = mos7840_chars_in_buffer(tty); 1251 1252 /* Check for Buffer status */ 1253 if (count <= 0) 1254 return; 1255 1256 /* Block the thread for a while */ 1257 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1258 timeout); 1259 /* No activity.. count down section */ 1260 wait--; 1261 if (wait == 0) { 1262 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__); 1263 return; 1264 } else { 1265 /* Reset timeout value back to seconds */ 1266 wait = 10; 1267 } 1268 } 1269 1270 } 1271 1272 /***************************************************************************** 1273 * mos7840_break 1274 * this function sends a break to the port 1275 *****************************************************************************/ 1276 static void mos7840_break(struct tty_struct *tty, int break_state) 1277 { 1278 struct usb_serial_port *port = tty->driver_data; 1279 unsigned char data; 1280 struct usb_serial *serial; 1281 struct moschip_port *mos7840_port; 1282 1283 if (mos7840_port_paranoia_check(port, __func__)) 1284 return; 1285 1286 serial = mos7840_get_usb_serial(port, __func__); 1287 if (!serial) 1288 return; 1289 1290 mos7840_port = mos7840_get_port_private(port); 1291 1292 if (mos7840_port == NULL) 1293 return; 1294 1295 /* flush and block until tx is empty */ 1296 mos7840_block_until_chase_response(tty, mos7840_port); 1297 1298 if (break_state == -1) 1299 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1300 else 1301 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1302 1303 /* FIXME: no locking on shadowLCR anywhere in driver */ 1304 mos7840_port->shadowLCR = data; 1305 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1306 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1307 mos7840_port->shadowLCR); 1308 } 1309 1310 /***************************************************************************** 1311 * mos7840_write_room 1312 * this function is called by the tty driver when it wants to know how many 1313 * bytes of data we can accept for a specific port. 1314 * If successful, we return the amount of room that we have for this port 1315 * Otherwise we return a negative error number. 1316 *****************************************************************************/ 1317 1318 static int mos7840_write_room(struct tty_struct *tty) 1319 { 1320 struct usb_serial_port *port = tty->driver_data; 1321 int i; 1322 int room = 0; 1323 unsigned long flags; 1324 struct moschip_port *mos7840_port; 1325 1326 if (mos7840_port_paranoia_check(port, __func__)) 1327 return -1; 1328 1329 mos7840_port = mos7840_get_port_private(port); 1330 if (mos7840_port == NULL) 1331 return -1; 1332 1333 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1334 for (i = 0; i < NUM_URBS; ++i) { 1335 if (!mos7840_port->busy[i]) 1336 room += URB_TRANSFER_BUFFER_SIZE; 1337 } 1338 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1339 1340 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1341 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); 1342 return room; 1343 1344 } 1345 1346 /***************************************************************************** 1347 * mos7840_write 1348 * this function is called by the tty driver when data should be written to 1349 * the port. 1350 * If successful, we return the number of bytes written, otherwise we 1351 * return a negative error number. 1352 *****************************************************************************/ 1353 1354 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1355 const unsigned char *data, int count) 1356 { 1357 int status; 1358 int i; 1359 int bytes_sent = 0; 1360 int transfer_size; 1361 unsigned long flags; 1362 1363 struct moschip_port *mos7840_port; 1364 struct usb_serial *serial; 1365 struct urb *urb; 1366 /* __u16 Data; */ 1367 const unsigned char *current_position = data; 1368 unsigned char *data1; 1369 1370 #ifdef NOTMOS7840 1371 Data = 0x00; 1372 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1373 mos7840_port->shadowLCR = Data; 1374 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data); 1375 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1376 1377 /* Data = 0x03; */ 1378 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1379 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1380 1381 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1382 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1383 1384 /* Data = 0x0c; */ 1385 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1386 Data = 0x00; 1387 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1388 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data); 1389 1390 Data = 0x0; 1391 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1392 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data); 1393 1394 Data = Data & ~SERIAL_LCR_DLAB; 1395 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1396 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1397 #endif 1398 1399 if (mos7840_port_paranoia_check(port, __func__)) 1400 return -1; 1401 1402 serial = port->serial; 1403 if (mos7840_serial_paranoia_check(serial, __func__)) 1404 return -1; 1405 1406 mos7840_port = mos7840_get_port_private(port); 1407 if (mos7840_port == NULL) 1408 return -1; 1409 1410 /* try to find a free urb in the list */ 1411 urb = NULL; 1412 1413 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1414 for (i = 0; i < NUM_URBS; ++i) { 1415 if (!mos7840_port->busy[i]) { 1416 mos7840_port->busy[i] = 1; 1417 urb = mos7840_port->write_urb_pool[i]; 1418 dev_dbg(&port->dev, "URB:%d\n", i); 1419 break; 1420 } 1421 } 1422 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1423 1424 if (urb == NULL) { 1425 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); 1426 goto exit; 1427 } 1428 1429 if (urb->transfer_buffer == NULL) { 1430 urb->transfer_buffer = 1431 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1432 1433 if (urb->transfer_buffer == NULL) { 1434 dev_err_console(port, "%s no more kernel memory...\n", 1435 __func__); 1436 goto exit; 1437 } 1438 } 1439 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1440 1441 memcpy(urb->transfer_buffer, current_position, transfer_size); 1442 1443 /* fill urb with data and submit */ 1444 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1445 usb_fill_bulk_urb(urb, 1446 serial->dev, 1447 usb_sndbulkpipe(serial->dev, 1448 (port->bulk_out_endpointAddress) + 2), 1449 urb->transfer_buffer, 1450 transfer_size, 1451 mos7840_bulk_out_data_callback, mos7840_port); 1452 } else { 1453 usb_fill_bulk_urb(urb, 1454 serial->dev, 1455 usb_sndbulkpipe(serial->dev, 1456 port->bulk_out_endpointAddress), 1457 urb->transfer_buffer, 1458 transfer_size, 1459 mos7840_bulk_out_data_callback, mos7840_port); 1460 } 1461 1462 data1 = urb->transfer_buffer; 1463 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); 1464 1465 if (mos7840_port->has_led) 1466 mos7840_led_activity(port); 1467 1468 /* send it down the pipe */ 1469 status = usb_submit_urb(urb, GFP_ATOMIC); 1470 1471 if (status) { 1472 mos7840_port->busy[i] = 0; 1473 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 1474 "with status = %d\n", __func__, status); 1475 bytes_sent = status; 1476 goto exit; 1477 } 1478 bytes_sent = transfer_size; 1479 port->icount.tx += transfer_size; 1480 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx); 1481 exit: 1482 return bytes_sent; 1483 1484 } 1485 1486 /***************************************************************************** 1487 * mos7840_throttle 1488 * this function is called by the tty driver when it wants to stop the data 1489 * being read from the port. 1490 *****************************************************************************/ 1491 1492 static void mos7840_throttle(struct tty_struct *tty) 1493 { 1494 struct usb_serial_port *port = tty->driver_data; 1495 struct moschip_port *mos7840_port; 1496 int status; 1497 1498 if (mos7840_port_paranoia_check(port, __func__)) 1499 return; 1500 1501 mos7840_port = mos7840_get_port_private(port); 1502 1503 if (mos7840_port == NULL) 1504 return; 1505 1506 if (!mos7840_port->open) { 1507 dev_dbg(&port->dev, "%s", "port not opened\n"); 1508 return; 1509 } 1510 1511 /* if we are implementing XON/XOFF, send the stop character */ 1512 if (I_IXOFF(tty)) { 1513 unsigned char stop_char = STOP_CHAR(tty); 1514 status = mos7840_write(tty, port, &stop_char, 1); 1515 if (status <= 0) 1516 return; 1517 } 1518 /* if we are implementing RTS/CTS, toggle that line */ 1519 if (tty->termios.c_cflag & CRTSCTS) { 1520 mos7840_port->shadowMCR &= ~MCR_RTS; 1521 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1522 mos7840_port->shadowMCR); 1523 if (status < 0) 1524 return; 1525 } 1526 } 1527 1528 /***************************************************************************** 1529 * mos7840_unthrottle 1530 * this function is called by the tty driver when it wants to resume 1531 * the data being read from the port (called after mos7840_throttle is 1532 * called) 1533 *****************************************************************************/ 1534 static void mos7840_unthrottle(struct tty_struct *tty) 1535 { 1536 struct usb_serial_port *port = tty->driver_data; 1537 int status; 1538 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1539 1540 if (mos7840_port_paranoia_check(port, __func__)) 1541 return; 1542 1543 if (mos7840_port == NULL) 1544 return; 1545 1546 if (!mos7840_port->open) { 1547 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1548 return; 1549 } 1550 1551 /* if we are implementing XON/XOFF, send the start character */ 1552 if (I_IXOFF(tty)) { 1553 unsigned char start_char = START_CHAR(tty); 1554 status = mos7840_write(tty, port, &start_char, 1); 1555 if (status <= 0) 1556 return; 1557 } 1558 1559 /* if we are implementing RTS/CTS, toggle that line */ 1560 if (tty->termios.c_cflag & CRTSCTS) { 1561 mos7840_port->shadowMCR |= MCR_RTS; 1562 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1563 mos7840_port->shadowMCR); 1564 if (status < 0) 1565 return; 1566 } 1567 } 1568 1569 static int mos7840_tiocmget(struct tty_struct *tty) 1570 { 1571 struct usb_serial_port *port = tty->driver_data; 1572 struct moschip_port *mos7840_port; 1573 unsigned int result; 1574 __u16 msr; 1575 __u16 mcr; 1576 int status; 1577 mos7840_port = mos7840_get_port_private(port); 1578 1579 if (mos7840_port == NULL) 1580 return -ENODEV; 1581 1582 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1583 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1584 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1585 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1586 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1587 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1588 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1589 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1590 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1591 1592 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 1593 1594 return result; 1595 } 1596 1597 static int mos7840_tiocmset(struct tty_struct *tty, 1598 unsigned int set, unsigned int clear) 1599 { 1600 struct usb_serial_port *port = tty->driver_data; 1601 struct moschip_port *mos7840_port; 1602 unsigned int mcr; 1603 int status; 1604 1605 mos7840_port = mos7840_get_port_private(port); 1606 1607 if (mos7840_port == NULL) 1608 return -ENODEV; 1609 1610 /* FIXME: What locks the port registers ? */ 1611 mcr = mos7840_port->shadowMCR; 1612 if (clear & TIOCM_RTS) 1613 mcr &= ~MCR_RTS; 1614 if (clear & TIOCM_DTR) 1615 mcr &= ~MCR_DTR; 1616 if (clear & TIOCM_LOOP) 1617 mcr &= ~MCR_LOOPBACK; 1618 1619 if (set & TIOCM_RTS) 1620 mcr |= MCR_RTS; 1621 if (set & TIOCM_DTR) 1622 mcr |= MCR_DTR; 1623 if (set & TIOCM_LOOP) 1624 mcr |= MCR_LOOPBACK; 1625 1626 mos7840_port->shadowMCR = mcr; 1627 1628 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1629 if (status < 0) { 1630 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); 1631 return status; 1632 } 1633 1634 return 0; 1635 } 1636 1637 /***************************************************************************** 1638 * mos7840_calc_baud_rate_divisor 1639 * this function calculates the proper baud rate divisor for the specified 1640 * baud rate. 1641 *****************************************************************************/ 1642 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, 1643 int baudRate, int *divisor, 1644 __u16 *clk_sel_val) 1645 { 1646 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); 1647 1648 if (baudRate <= 115200) { 1649 *divisor = 115200 / baudRate; 1650 *clk_sel_val = 0x0; 1651 } 1652 if ((baudRate > 115200) && (baudRate <= 230400)) { 1653 *divisor = 230400 / baudRate; 1654 *clk_sel_val = 0x10; 1655 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1656 *divisor = 403200 / baudRate; 1657 *clk_sel_val = 0x20; 1658 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1659 *divisor = 460800 / baudRate; 1660 *clk_sel_val = 0x30; 1661 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1662 *divisor = 806400 / baudRate; 1663 *clk_sel_val = 0x40; 1664 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1665 *divisor = 921600 / baudRate; 1666 *clk_sel_val = 0x50; 1667 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1668 *divisor = 1572864 / baudRate; 1669 *clk_sel_val = 0x60; 1670 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1671 *divisor = 3145728 / baudRate; 1672 *clk_sel_val = 0x70; 1673 } 1674 return 0; 1675 1676 #ifdef NOTMCS7840 1677 1678 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1679 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1680 *divisor = mos7840_divisor_table[i].Divisor; 1681 return 0; 1682 } 1683 } 1684 1685 /* After trying for all the standard baud rates * 1686 * Try calculating the divisor for this baud rate */ 1687 1688 if (baudrate > 75 && baudrate < 230400) { 1689 /* get the divisor */ 1690 custom = (__u16) (230400L / baudrate); 1691 1692 /* Check for round off */ 1693 round1 = (__u16) (2304000L / baudrate); 1694 round = (__u16) (round1 - (custom * 10)); 1695 if (round > 4) 1696 custom++; 1697 *divisor = custom; 1698 1699 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom); 1700 return 0; 1701 } 1702 1703 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n"); 1704 return -1; 1705 #endif 1706 } 1707 1708 /***************************************************************************** 1709 * mos7840_send_cmd_write_baud_rate 1710 * this function sends the proper command to change the baud rate of the 1711 * specified port. 1712 *****************************************************************************/ 1713 1714 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1715 int baudRate) 1716 { 1717 int divisor = 0; 1718 int status; 1719 __u16 Data; 1720 unsigned char number; 1721 __u16 clk_sel_val; 1722 struct usb_serial_port *port; 1723 1724 if (mos7840_port == NULL) 1725 return -1; 1726 1727 port = mos7840_port->port; 1728 if (mos7840_port_paranoia_check(port, __func__)) 1729 return -1; 1730 1731 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1732 return -1; 1733 1734 number = mos7840_port->port->port_number; 1735 1736 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate); 1737 /* reset clk_uart_sel in spregOffset */ 1738 if (baudRate > 115200) { 1739 #ifdef HW_flow_control 1740 /* NOTE: need to see the pther register to modify */ 1741 /* setting h/w flow control bit to 1 */ 1742 Data = 0x2b; 1743 mos7840_port->shadowMCR = Data; 1744 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1745 Data); 1746 if (status < 0) { 1747 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1748 return -1; 1749 } 1750 #endif 1751 1752 } else { 1753 #ifdef HW_flow_control 1754 /* setting h/w flow control bit to 0 */ 1755 Data = 0xb; 1756 mos7840_port->shadowMCR = Data; 1757 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1758 Data); 1759 if (status < 0) { 1760 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1761 return -1; 1762 } 1763 #endif 1764 1765 } 1766 1767 if (1) { /* baudRate <= 115200) */ 1768 clk_sel_val = 0x0; 1769 Data = 0x0; 1770 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, 1771 &clk_sel_val); 1772 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1773 &Data); 1774 if (status < 0) { 1775 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); 1776 return -1; 1777 } 1778 Data = (Data & 0x8f) | clk_sel_val; 1779 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1780 Data); 1781 if (status < 0) { 1782 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1783 return -1; 1784 } 1785 /* Calculate the Divisor */ 1786 1787 if (status) { 1788 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1789 return status; 1790 } 1791 /* Enable access to divisor latch */ 1792 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1793 mos7840_port->shadowLCR = Data; 1794 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1795 1796 /* Write the divisor */ 1797 Data = (unsigned char)(divisor & 0xff); 1798 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); 1799 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1800 1801 Data = (unsigned char)((divisor & 0xff00) >> 8); 1802 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); 1803 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1804 1805 /* Disable access to divisor latch */ 1806 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1807 mos7840_port->shadowLCR = Data; 1808 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1809 1810 } 1811 return status; 1812 } 1813 1814 /***************************************************************************** 1815 * mos7840_change_port_settings 1816 * This routine is called to set the UART on the device to match 1817 * the specified new settings. 1818 *****************************************************************************/ 1819 1820 static void mos7840_change_port_settings(struct tty_struct *tty, 1821 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1822 { 1823 int baud; 1824 unsigned cflag; 1825 unsigned iflag; 1826 __u8 lData; 1827 __u8 lParity; 1828 __u8 lStop; 1829 int status; 1830 __u16 Data; 1831 struct usb_serial_port *port; 1832 struct usb_serial *serial; 1833 1834 if (mos7840_port == NULL) 1835 return; 1836 1837 port = mos7840_port->port; 1838 1839 if (mos7840_port_paranoia_check(port, __func__)) 1840 return; 1841 1842 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1843 return; 1844 1845 serial = port->serial; 1846 1847 if (!mos7840_port->open) { 1848 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1849 return; 1850 } 1851 1852 lData = LCR_BITS_8; 1853 lStop = LCR_STOP_1; 1854 lParity = LCR_PAR_NONE; 1855 1856 cflag = tty->termios.c_cflag; 1857 iflag = tty->termios.c_iflag; 1858 1859 /* Change the number of bits */ 1860 if (cflag & CSIZE) { 1861 switch (cflag & CSIZE) { 1862 case CS5: 1863 lData = LCR_BITS_5; 1864 break; 1865 1866 case CS6: 1867 lData = LCR_BITS_6; 1868 break; 1869 1870 case CS7: 1871 lData = LCR_BITS_7; 1872 break; 1873 default: 1874 case CS8: 1875 lData = LCR_BITS_8; 1876 break; 1877 } 1878 } 1879 /* Change the Parity bit */ 1880 if (cflag & PARENB) { 1881 if (cflag & PARODD) { 1882 lParity = LCR_PAR_ODD; 1883 dev_dbg(&port->dev, "%s - parity = odd\n", __func__); 1884 } else { 1885 lParity = LCR_PAR_EVEN; 1886 dev_dbg(&port->dev, "%s - parity = even\n", __func__); 1887 } 1888 1889 } else { 1890 dev_dbg(&port->dev, "%s - parity = none\n", __func__); 1891 } 1892 1893 if (cflag & CMSPAR) 1894 lParity = lParity | 0x20; 1895 1896 /* Change the Stop bit */ 1897 if (cflag & CSTOPB) { 1898 lStop = LCR_STOP_2; 1899 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); 1900 } else { 1901 lStop = LCR_STOP_1; 1902 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); 1903 } 1904 1905 /* Update the LCR with the correct value */ 1906 mos7840_port->shadowLCR &= 1907 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1908 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1909 1910 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, 1911 mos7840_port->shadowLCR); 1912 /* Disable Interrupts */ 1913 Data = 0x00; 1914 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1915 1916 Data = 0x00; 1917 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1918 1919 Data = 0xcf; 1920 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1921 1922 /* Send the updated LCR value to the mos7840 */ 1923 Data = mos7840_port->shadowLCR; 1924 1925 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1926 1927 Data = 0x00b; 1928 mos7840_port->shadowMCR = Data; 1929 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1930 Data = 0x00b; 1931 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1932 1933 /* set up the MCR register and send it to the mos7840 */ 1934 1935 mos7840_port->shadowMCR = MCR_MASTER_IE; 1936 if (cflag & CBAUD) 1937 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1938 1939 if (cflag & CRTSCTS) 1940 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1941 else 1942 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 1943 1944 Data = mos7840_port->shadowMCR; 1945 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1946 1947 /* Determine divisor based on baud rate */ 1948 baud = tty_get_baud_rate(tty); 1949 1950 if (!baud) { 1951 /* pick a default, any default... */ 1952 dev_dbg(&port->dev, "%s", "Picked default baud...\n"); 1953 baud = 9600; 1954 } 1955 1956 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); 1957 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 1958 1959 /* Enable Interrupts */ 1960 Data = 0x0c; 1961 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1962 1963 if (mos7840_port->read_urb_busy == false) { 1964 mos7840_port->read_urb_busy = true; 1965 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 1966 if (status) { 1967 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1968 status); 1969 mos7840_port->read_urb_busy = false; 1970 } 1971 } 1972 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, 1973 mos7840_port->shadowLCR); 1974 } 1975 1976 /***************************************************************************** 1977 * mos7840_set_termios 1978 * this function is called by the tty driver when it wants to change 1979 * the termios structure 1980 *****************************************************************************/ 1981 1982 static void mos7840_set_termios(struct tty_struct *tty, 1983 struct usb_serial_port *port, 1984 struct ktermios *old_termios) 1985 { 1986 int status; 1987 unsigned int cflag; 1988 struct usb_serial *serial; 1989 struct moschip_port *mos7840_port; 1990 1991 if (mos7840_port_paranoia_check(port, __func__)) 1992 return; 1993 1994 serial = port->serial; 1995 1996 if (mos7840_serial_paranoia_check(serial, __func__)) 1997 return; 1998 1999 mos7840_port = mos7840_get_port_private(port); 2000 2001 if (mos7840_port == NULL) 2002 return; 2003 2004 if (!mos7840_port->open) { 2005 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 2006 return; 2007 } 2008 2009 dev_dbg(&port->dev, "%s", "setting termios - \n"); 2010 2011 cflag = tty->termios.c_cflag; 2012 2013 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, 2014 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); 2015 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, 2016 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2017 2018 /* change the port settings to the new ones specified */ 2019 2020 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2021 2022 if (!mos7840_port->read_urb) { 2023 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n"); 2024 return; 2025 } 2026 2027 if (mos7840_port->read_urb_busy == false) { 2028 mos7840_port->read_urb_busy = true; 2029 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2030 if (status) { 2031 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 2032 status); 2033 mos7840_port->read_urb_busy = false; 2034 } 2035 } 2036 } 2037 2038 /***************************************************************************** 2039 * mos7840_get_lsr_info - get line status register info 2040 * 2041 * Purpose: Let user call ioctl() to get info when the UART physically 2042 * is emptied. On bus types like RS485, the transmitter must 2043 * release the bus after transmitting. This must be done when 2044 * the transmit shift register is empty, not be done when the 2045 * transmit holding register is empty. This functionality 2046 * allows an RS485 driver to be written in user space. 2047 *****************************************************************************/ 2048 2049 static int mos7840_get_lsr_info(struct tty_struct *tty, 2050 unsigned int __user *value) 2051 { 2052 int count; 2053 unsigned int result = 0; 2054 2055 count = mos7840_chars_in_buffer(tty); 2056 if (count == 0) 2057 result = TIOCSER_TEMT; 2058 2059 if (copy_to_user(value, &result, sizeof(int))) 2060 return -EFAULT; 2061 return 0; 2062 } 2063 2064 /***************************************************************************** 2065 * mos7840_get_serial_info 2066 * function to get information about serial port 2067 *****************************************************************************/ 2068 2069 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2070 struct serial_struct __user *retinfo) 2071 { 2072 struct serial_struct tmp; 2073 2074 if (mos7840_port == NULL) 2075 return -1; 2076 2077 if (!retinfo) 2078 return -EFAULT; 2079 2080 memset(&tmp, 0, sizeof(tmp)); 2081 2082 tmp.type = PORT_16550A; 2083 tmp.line = mos7840_port->port->minor; 2084 tmp.port = mos7840_port->port->port_number; 2085 tmp.irq = 0; 2086 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2087 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2088 tmp.baud_base = 9600; 2089 tmp.close_delay = 5 * HZ; 2090 tmp.closing_wait = 30 * HZ; 2091 2092 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2093 return -EFAULT; 2094 return 0; 2095 } 2096 2097 /***************************************************************************** 2098 * SerialIoctl 2099 * this function handles any ioctl calls to the driver 2100 *****************************************************************************/ 2101 2102 static int mos7840_ioctl(struct tty_struct *tty, 2103 unsigned int cmd, unsigned long arg) 2104 { 2105 struct usb_serial_port *port = tty->driver_data; 2106 void __user *argp = (void __user *)arg; 2107 struct moschip_port *mos7840_port; 2108 2109 if (mos7840_port_paranoia_check(port, __func__)) 2110 return -1; 2111 2112 mos7840_port = mos7840_get_port_private(port); 2113 2114 if (mos7840_port == NULL) 2115 return -1; 2116 2117 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd); 2118 2119 switch (cmd) { 2120 /* return number of bytes available */ 2121 2122 case TIOCSERGETLSR: 2123 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 2124 return mos7840_get_lsr_info(tty, argp); 2125 2126 case TIOCGSERIAL: 2127 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); 2128 return mos7840_get_serial_info(mos7840_port, argp); 2129 2130 case TIOCSSERIAL: 2131 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__); 2132 break; 2133 default: 2134 break; 2135 } 2136 return -ENOIOCTLCMD; 2137 } 2138 2139 static int mos7810_check(struct usb_serial *serial) 2140 { 2141 int i, pass_count = 0; 2142 u8 *buf; 2143 __u16 data = 0, mcr_data = 0; 2144 __u16 test_pattern = 0x55AA; 2145 int res; 2146 2147 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2148 if (!buf) 2149 return 0; /* failed to identify 7810 */ 2150 2151 /* Store MCR setting */ 2152 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2153 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, 2154 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2155 if (res == VENDOR_READ_LENGTH) 2156 mcr_data = *buf; 2157 2158 for (i = 0; i < 16; i++) { 2159 /* Send the 1-bit test pattern out to MCS7810 test pin */ 2160 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2161 MCS_WRREQ, MCS_WR_RTYPE, 2162 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), 2163 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); 2164 2165 /* Read the test pattern back */ 2166 res = usb_control_msg(serial->dev, 2167 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, 2168 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2169 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2170 if (res == VENDOR_READ_LENGTH) 2171 data = *buf; 2172 2173 /* If this is a MCS7810 device, both test patterns must match */ 2174 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) 2175 break; 2176 2177 pass_count++; 2178 } 2179 2180 /* Restore MCR setting */ 2181 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, 2182 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 2183 0, MOS_WDR_TIMEOUT); 2184 2185 kfree(buf); 2186 2187 if (pass_count == 16) 2188 return 1; 2189 2190 return 0; 2191 } 2192 2193 static int mos7840_probe(struct usb_serial *serial, 2194 const struct usb_device_id *id) 2195 { 2196 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); 2197 u8 *buf; 2198 int device_type; 2199 2200 if (product == MOSCHIP_DEVICE_ID_7810 || 2201 product == MOSCHIP_DEVICE_ID_7820) { 2202 device_type = product; 2203 goto out; 2204 } 2205 2206 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2207 if (!buf) 2208 return -ENOMEM; 2209 2210 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2211 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2212 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2213 2214 /* For a MCS7840 device GPIO0 must be set to 1 */ 2215 if (buf[0] & 0x01) 2216 device_type = MOSCHIP_DEVICE_ID_7840; 2217 else if (mos7810_check(serial)) 2218 device_type = MOSCHIP_DEVICE_ID_7810; 2219 else 2220 device_type = MOSCHIP_DEVICE_ID_7820; 2221 2222 kfree(buf); 2223 out: 2224 usb_set_serial_data(serial, (void *)(unsigned long)device_type); 2225 2226 return 0; 2227 } 2228 2229 static int mos7840_calc_num_ports(struct usb_serial *serial) 2230 { 2231 int device_type = (unsigned long)usb_get_serial_data(serial); 2232 int mos7840_num_ports; 2233 2234 mos7840_num_ports = (device_type >> 4) & 0x000F; 2235 2236 return mos7840_num_ports; 2237 } 2238 2239 static int mos7840_port_probe(struct usb_serial_port *port) 2240 { 2241 struct usb_serial *serial = port->serial; 2242 int device_type = (unsigned long)usb_get_serial_data(serial); 2243 struct moschip_port *mos7840_port; 2244 int status; 2245 int pnum; 2246 __u16 Data; 2247 2248 /* we set up the pointers to the endpoints in the mos7840_open * 2249 * function, as the structures aren't created yet. */ 2250 2251 pnum = port->port_number; 2252 2253 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); 2254 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2255 if (mos7840_port == NULL) { 2256 dev_err(&port->dev, "%s - Out of memory\n", __func__); 2257 return -ENOMEM; 2258 } 2259 2260 /* Initialize all port interrupt end point to port 0 int 2261 * endpoint. Our device has only one interrupt end point 2262 * common to all port */ 2263 2264 mos7840_port->port = port; 2265 mos7840_set_port_private(port, mos7840_port); 2266 spin_lock_init(&mos7840_port->pool_lock); 2267 2268 /* minor is not initialised until later by 2269 * usb-serial.c:get_free_serial() and cannot therefore be used 2270 * to index device instances */ 2271 mos7840_port->port_num = pnum + 1; 2272 dev_dbg(&port->dev, "port->minor = %d\n", port->minor); 2273 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); 2274 2275 if (mos7840_port->port_num == 1) { 2276 mos7840_port->SpRegOffset = 0x0; 2277 mos7840_port->ControlRegOffset = 0x1; 2278 mos7840_port->DcrRegOffset = 0x4; 2279 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) { 2280 mos7840_port->SpRegOffset = 0x8; 2281 mos7840_port->ControlRegOffset = 0x9; 2282 mos7840_port->DcrRegOffset = 0x16; 2283 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) { 2284 mos7840_port->SpRegOffset = 0xa; 2285 mos7840_port->ControlRegOffset = 0xb; 2286 mos7840_port->DcrRegOffset = 0x19; 2287 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) { 2288 mos7840_port->SpRegOffset = 0xa; 2289 mos7840_port->ControlRegOffset = 0xb; 2290 mos7840_port->DcrRegOffset = 0x19; 2291 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) { 2292 mos7840_port->SpRegOffset = 0xc; 2293 mos7840_port->ControlRegOffset = 0xd; 2294 mos7840_port->DcrRegOffset = 0x1c; 2295 } 2296 mos7840_dump_serial_port(port, mos7840_port); 2297 mos7840_set_port_private(port, mos7840_port); 2298 2299 /* enable rx_disable bit in control register */ 2300 status = mos7840_get_reg_sync(port, 2301 mos7840_port->ControlRegOffset, &Data); 2302 if (status < 0) { 2303 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); 2304 goto out; 2305 } else 2306 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); 2307 Data |= 0x08; /* setting driver done bit */ 2308 Data |= 0x04; /* sp1_bit to have cts change reflect in 2309 modem status reg */ 2310 2311 /* Data |= 0x20; //rx_disable bit */ 2312 status = mos7840_set_reg_sync(port, 2313 mos7840_port->ControlRegOffset, Data); 2314 if (status < 0) { 2315 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2316 goto out; 2317 } else 2318 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); 2319 2320 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2321 and 0x24 in DCR3 */ 2322 Data = 0x01; 2323 status = mos7840_set_reg_sync(port, 2324 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2325 if (status < 0) { 2326 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); 2327 goto out; 2328 } else 2329 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); 2330 2331 Data = 0x05; 2332 status = mos7840_set_reg_sync(port, 2333 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2334 if (status < 0) { 2335 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); 2336 goto out; 2337 } else 2338 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); 2339 2340 Data = 0x24; 2341 status = mos7840_set_reg_sync(port, 2342 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2343 if (status < 0) { 2344 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); 2345 goto out; 2346 } else 2347 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); 2348 2349 /* write values in clkstart0x0 and clkmulti 0x20 */ 2350 Data = 0x0; 2351 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); 2352 if (status < 0) { 2353 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2354 goto out; 2355 } else 2356 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2357 2358 Data = 0x20; 2359 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); 2360 if (status < 0) { 2361 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); 2362 goto error; 2363 } else 2364 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); 2365 2366 /* write value 0x0 to scratchpad register */ 2367 Data = 0x00; 2368 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); 2369 if (status < 0) { 2370 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); 2371 goto out; 2372 } else 2373 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); 2374 2375 /* Zero Length flag register */ 2376 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { 2377 Data = 0xff; 2378 status = mos7840_set_reg_sync(port, 2379 (__u16) (ZLP_REG1 + 2380 ((__u16)mos7840_port->port_num)), Data); 2381 dev_dbg(&port->dev, "ZLIP offset %x\n", 2382 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); 2383 if (status < 0) { 2384 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); 2385 goto out; 2386 } else 2387 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); 2388 } else { 2389 Data = 0xff; 2390 status = mos7840_set_reg_sync(port, 2391 (__u16) (ZLP_REG1 + 2392 ((__u16)mos7840_port->port_num) - 0x1), Data); 2393 dev_dbg(&port->dev, "ZLIP offset %x\n", 2394 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); 2395 if (status < 0) { 2396 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); 2397 goto out; 2398 } else 2399 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); 2400 2401 } 2402 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2403 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2404 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2405 GFP_KERNEL); 2406 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2407 !mos7840_port->dr) { 2408 status = -ENOMEM; 2409 goto error; 2410 } 2411 2412 mos7840_port->has_led = false; 2413 2414 /* Initialize LED timers */ 2415 if (device_type == MOSCHIP_DEVICE_ID_7810) { 2416 mos7840_port->has_led = true; 2417 2418 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL); 2419 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr), 2420 GFP_KERNEL); 2421 if (!mos7840_port->led_urb || !mos7840_port->led_dr) { 2422 status = -ENOMEM; 2423 goto error; 2424 } 2425 2426 init_timer(&mos7840_port->led_timer1); 2427 mos7840_port->led_timer1.function = mos7840_led_off; 2428 mos7840_port->led_timer1.expires = 2429 jiffies + msecs_to_jiffies(LED_ON_MS); 2430 mos7840_port->led_timer1.data = (unsigned long)mos7840_port; 2431 2432 init_timer(&mos7840_port->led_timer2); 2433 mos7840_port->led_timer2.function = mos7840_led_flag_off; 2434 mos7840_port->led_timer2.expires = 2435 jiffies + msecs_to_jiffies(LED_OFF_MS); 2436 mos7840_port->led_timer2.data = (unsigned long)mos7840_port; 2437 2438 /* Turn off LED */ 2439 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2440 } 2441 out: 2442 if (pnum == serial->num_ports - 1) { 2443 /* Zero Length flag enable */ 2444 Data = 0x0f; 2445 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2446 if (status < 0) { 2447 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status); 2448 goto error; 2449 } else 2450 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status); 2451 2452 /* setting configuration feature to one */ 2453 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2454 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 2455 MOS_WDR_TIMEOUT); 2456 } 2457 return 0; 2458 error: 2459 kfree(mos7840_port->led_dr); 2460 usb_free_urb(mos7840_port->led_urb); 2461 kfree(mos7840_port->dr); 2462 kfree(mos7840_port->ctrl_buf); 2463 usb_free_urb(mos7840_port->control_urb); 2464 kfree(mos7840_port); 2465 2466 return status; 2467 } 2468 2469 static int mos7840_port_remove(struct usb_serial_port *port) 2470 { 2471 struct moschip_port *mos7840_port; 2472 2473 mos7840_port = mos7840_get_port_private(port); 2474 2475 if (mos7840_port->has_led) { 2476 /* Turn off LED */ 2477 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2478 2479 del_timer_sync(&mos7840_port->led_timer1); 2480 del_timer_sync(&mos7840_port->led_timer2); 2481 2482 usb_kill_urb(mos7840_port->led_urb); 2483 usb_free_urb(mos7840_port->led_urb); 2484 kfree(mos7840_port->led_dr); 2485 } 2486 usb_kill_urb(mos7840_port->control_urb); 2487 usb_free_urb(mos7840_port->control_urb); 2488 kfree(mos7840_port->ctrl_buf); 2489 kfree(mos7840_port->dr); 2490 kfree(mos7840_port); 2491 2492 return 0; 2493 } 2494 2495 static struct usb_serial_driver moschip7840_4port_device = { 2496 .driver = { 2497 .owner = THIS_MODULE, 2498 .name = "mos7840", 2499 }, 2500 .description = DRIVER_DESC, 2501 .id_table = id_table, 2502 .num_ports = 4, 2503 .open = mos7840_open, 2504 .close = mos7840_close, 2505 .write = mos7840_write, 2506 .write_room = mos7840_write_room, 2507 .chars_in_buffer = mos7840_chars_in_buffer, 2508 .throttle = mos7840_throttle, 2509 .unthrottle = mos7840_unthrottle, 2510 .calc_num_ports = mos7840_calc_num_ports, 2511 .probe = mos7840_probe, 2512 .ioctl = mos7840_ioctl, 2513 .set_termios = mos7840_set_termios, 2514 .break_ctl = mos7840_break, 2515 .tiocmget = mos7840_tiocmget, 2516 .tiocmset = mos7840_tiocmset, 2517 .tiocmiwait = usb_serial_generic_tiocmiwait, 2518 .get_icount = usb_serial_generic_get_icount, 2519 .port_probe = mos7840_port_probe, 2520 .port_remove = mos7840_port_remove, 2521 .read_bulk_callback = mos7840_bulk_in_callback, 2522 .read_int_callback = mos7840_interrupt_callback, 2523 }; 2524 2525 static struct usb_serial_driver * const serial_drivers[] = { 2526 &moschip7840_4port_device, NULL 2527 }; 2528 2529 module_usb_serial_driver(serial_drivers, id_table); 2530 2531 MODULE_DESCRIPTION(DRIVER_DESC); 2532 MODULE_LICENSE("GPL"); 2533