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 /* 39 * Version Information 40 */ 41 #define DRIVER_VERSION "1.3.2" 42 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" 43 44 /* 45 * 16C50 UART register defines 46 */ 47 48 #define LCR_BITS_5 0x00 /* 5 bits/char */ 49 #define LCR_BITS_6 0x01 /* 6 bits/char */ 50 #define LCR_BITS_7 0x02 /* 7 bits/char */ 51 #define LCR_BITS_8 0x03 /* 8 bits/char */ 52 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ 53 54 #define LCR_STOP_1 0x00 /* 1 stop bit */ 55 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ 56 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ 57 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ 58 59 #define LCR_PAR_NONE 0x00 /* No parity */ 60 #define LCR_PAR_ODD 0x08 /* Odd parity */ 61 #define LCR_PAR_EVEN 0x18 /* Even parity */ 62 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ 63 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ 64 #define LCR_PAR_MASK 0x38 /* Mask for parity field */ 65 66 #define LCR_SET_BREAK 0x40 /* Set Break condition */ 67 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ 68 69 #define MCR_DTR 0x01 /* Assert DTR */ 70 #define MCR_RTS 0x02 /* Assert RTS */ 71 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ 72 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ 73 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ 74 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ 75 76 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ 77 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ 78 #define MOS7840_MSR_RI 0x40 /* Current state of RI */ 79 #define MOS7840_MSR_CD 0x80 /* Current state of CD */ 80 81 /* 82 * Defines used for sending commands to port 83 */ 84 85 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */ 86 87 #define MOS_PORT1 0x0200 88 #define MOS_PORT2 0x0300 89 #define MOS_VENREG 0x0000 90 #define MOS_MAX_PORT 0x02 91 #define MOS_WRITE 0x0E 92 #define MOS_READ 0x0D 93 94 /* Requests */ 95 #define MCS_RD_RTYPE 0xC0 96 #define MCS_WR_RTYPE 0x40 97 #define MCS_RDREQ 0x0D 98 #define MCS_WRREQ 0x0E 99 #define MCS_CTRL_TIMEOUT 500 100 #define VENDOR_READ_LENGTH (0x01) 101 102 #define MAX_NAME_LEN 64 103 104 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ 105 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ 106 107 /* For higher baud Rates use TIOCEXBAUD */ 108 #define TIOCEXBAUD 0x5462 109 110 /* vendor id and device id defines */ 111 112 /* The native mos7840/7820 component */ 113 #define USB_VENDOR_ID_MOSCHIP 0x9710 114 #define MOSCHIP_DEVICE_ID_7840 0x7840 115 #define MOSCHIP_DEVICE_ID_7820 0x7820 116 #define MOSCHIP_DEVICE_ID_7810 0x7810 117 /* The native component can have its vendor/device id's overridden 118 * in vendor-specific implementations. Such devices can be handled 119 * by making a change here, in id_table. 120 */ 121 #define USB_VENDOR_ID_BANDB 0x0856 122 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22 123 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00 124 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24 125 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01 126 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29 127 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30 128 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31 129 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32 130 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 131 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02 132 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 133 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03 134 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24 135 136 /* This driver also supports 137 * ATEN UC2324 device using Moschip MCS7840 138 * ATEN UC2322 device using Moschip MCS7820 139 */ 140 #define USB_VENDOR_ID_ATENINTL 0x0557 141 #define ATENINTL_DEVICE_ID_UC2324 0x2011 142 #define ATENINTL_DEVICE_ID_UC2322 0x7820 143 144 /* Interrupt Routine Defines */ 145 146 #define SERIAL_IIR_RLS 0x06 147 #define SERIAL_IIR_MS 0x00 148 149 /* 150 * Emulation of the bit mask on the LINE STATUS REGISTER. 151 */ 152 #define SERIAL_LSR_DR 0x0001 153 #define SERIAL_LSR_OE 0x0002 154 #define SERIAL_LSR_PE 0x0004 155 #define SERIAL_LSR_FE 0x0008 156 #define SERIAL_LSR_BI 0x0010 157 158 #define MOS_MSR_DELTA_CTS 0x10 159 #define MOS_MSR_DELTA_DSR 0x20 160 #define MOS_MSR_DELTA_RI 0x40 161 #define MOS_MSR_DELTA_CD 0x80 162 163 /* Serial Port register Address */ 164 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) 165 #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) 166 #define LINE_CONTROL_REGISTER ((__u16)(0x03)) 167 #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) 168 #define LINE_STATUS_REGISTER ((__u16)(0x05)) 169 #define MODEM_STATUS_REGISTER ((__u16)(0x06)) 170 #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) 171 #define DIVISOR_LATCH_LSB ((__u16)(0x00)) 172 #define DIVISOR_LATCH_MSB ((__u16)(0x01)) 173 174 #define CLK_MULTI_REGISTER ((__u16)(0x02)) 175 #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) 176 #define GPIO_REGISTER ((__u16)(0x07)) 177 178 #define SERIAL_LCR_DLAB ((__u16)(0x0080)) 179 180 /* 181 * URB POOL related defines 182 */ 183 #define NUM_URBS 16 /* URB Count */ 184 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 185 186 /* LED on/off milliseconds*/ 187 #define LED_ON_MS 500 188 #define LED_OFF_MS 500 189 190 static int device_type; 191 192 static const struct usb_device_id id_table[] = { 193 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 194 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 195 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)}, 196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, 197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, 198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, 199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, 200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, 201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, 202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, 203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, 204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, 206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 207 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, 208 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, 209 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 210 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 211 {} /* terminating entry */ 212 }; 213 MODULE_DEVICE_TABLE(usb, id_table); 214 215 /* This structure holds all of the local port information */ 216 217 struct moschip_port { 218 int port_num; /*Actual port number in the device(1,2,etc) */ 219 struct urb *write_urb; /* write URB for this port */ 220 struct urb *read_urb; /* read URB for this port */ 221 struct urb *int_urb; 222 __u8 shadowLCR; /* last LCR value received */ 223 __u8 shadowMCR; /* last MCR value received */ 224 char open; 225 char open_ports; 226 char zombie; 227 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 228 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 229 int delta_msr_cond; 230 struct async_icount icount; 231 struct usb_serial_port *port; /* loop back to the owner of this object */ 232 233 /* Offsets */ 234 __u8 SpRegOffset; 235 __u8 ControlRegOffset; 236 __u8 DcrRegOffset; 237 /* for processing control URBS in interrupt context */ 238 struct urb *control_urb; 239 struct usb_ctrlrequest *dr; 240 char *ctrl_buf; 241 int MsrLsr; 242 243 spinlock_t pool_lock; 244 struct urb *write_urb_pool[NUM_URBS]; 245 char busy[NUM_URBS]; 246 bool read_urb_busy; 247 248 /* For device(s) with LED indicator */ 249 bool has_led; 250 bool led_flag; 251 struct timer_list led_timer1; /* Timer for LED on */ 252 struct timer_list led_timer2; /* Timer for LED off */ 253 }; 254 255 /* 256 * mos7840_set_reg_sync 257 * To set the Control register by calling usb_fill_control_urb function 258 * by passing usb_sndctrlpipe function as parameter. 259 */ 260 261 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 262 __u16 val) 263 { 264 struct usb_device *dev = port->serial->dev; 265 val = val & 0x00ff; 266 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val); 267 268 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 269 MCS_WR_RTYPE, val, reg, NULL, 0, 270 MOS_WDR_TIMEOUT); 271 } 272 273 /* 274 * mos7840_get_reg_sync 275 * To set the Uart register by calling usb_fill_control_urb function by 276 * passing usb_rcvctrlpipe function as parameter. 277 */ 278 279 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 280 __u16 *val) 281 { 282 struct usb_device *dev = port->serial->dev; 283 int ret = 0; 284 u8 *buf; 285 286 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 287 if (!buf) 288 return -ENOMEM; 289 290 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 291 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, 292 MOS_WDR_TIMEOUT); 293 *val = buf[0]; 294 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val); 295 296 kfree(buf); 297 return ret; 298 } 299 300 /* 301 * mos7840_set_uart_reg 302 * To set the Uart register by calling usb_fill_control_urb function by 303 * passing usb_sndctrlpipe function as parameter. 304 */ 305 306 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 307 __u16 val) 308 { 309 310 struct usb_device *dev = port->serial->dev; 311 val = val & 0x00ff; 312 /* For the UART control registers, the application number need 313 to be Or'ed */ 314 if (port->serial->num_ports == 4) { 315 val |= (((__u16) port->number - 316 (__u16) (port->serial->minor)) + 1) << 8; 317 } else { 318 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 319 val |= (((__u16) port->number - 320 (__u16) (port->serial->minor)) + 1) << 8; 321 } else { 322 val |= (((__u16) port->number - 323 (__u16) (port->serial->minor)) + 2) << 8; 324 } 325 } 326 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val); 327 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 328 MCS_WR_RTYPE, val, reg, NULL, 0, 329 MOS_WDR_TIMEOUT); 330 331 } 332 333 /* 334 * mos7840_get_uart_reg 335 * To set the Control register by calling usb_fill_control_urb function 336 * by passing usb_rcvctrlpipe function as parameter. 337 */ 338 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 339 __u16 *val) 340 { 341 struct usb_device *dev = port->serial->dev; 342 int ret = 0; 343 __u16 Wval; 344 u8 *buf; 345 346 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 347 if (!buf) 348 return -ENOMEM; 349 350 /* Wval is same as application number */ 351 if (port->serial->num_ports == 4) { 352 Wval = 353 (((__u16) port->number - (__u16) (port->serial->minor)) + 354 1) << 8; 355 } else { 356 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 357 Wval = (((__u16) port->number - 358 (__u16) (port->serial->minor)) + 1) << 8; 359 } else { 360 Wval = (((__u16) port->number - 361 (__u16) (port->serial->minor)) + 2) << 8; 362 } 363 } 364 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval); 365 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 366 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, 367 MOS_WDR_TIMEOUT); 368 *val = buf[0]; 369 370 kfree(buf); 371 return ret; 372 } 373 374 static void mos7840_dump_serial_port(struct usb_serial_port *port, 375 struct moschip_port *mos7840_port) 376 { 377 378 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 379 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset); 380 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset); 381 382 } 383 384 /************************************************************************/ 385 /************************************************************************/ 386 /* I N T E R F A C E F U N C T I O N S */ 387 /* I N T E R F A C E F U N C T I O N S */ 388 /************************************************************************/ 389 /************************************************************************/ 390 391 static inline void mos7840_set_port_private(struct usb_serial_port *port, 392 struct moschip_port *data) 393 { 394 usb_set_serial_port_data(port, (void *)data); 395 } 396 397 static inline struct moschip_port *mos7840_get_port_private(struct 398 usb_serial_port 399 *port) 400 { 401 return (struct moschip_port *)usb_get_serial_port_data(port); 402 } 403 404 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 405 { 406 struct moschip_port *mos7840_port; 407 struct async_icount *icount; 408 mos7840_port = port; 409 icount = &mos7840_port->icount; 410 if (new_msr & 411 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 412 MOS_MSR_DELTA_CD)) { 413 icount = &mos7840_port->icount; 414 415 /* update input line counters */ 416 if (new_msr & MOS_MSR_DELTA_CTS) { 417 icount->cts++; 418 smp_wmb(); 419 } 420 if (new_msr & MOS_MSR_DELTA_DSR) { 421 icount->dsr++; 422 smp_wmb(); 423 } 424 if (new_msr & MOS_MSR_DELTA_CD) { 425 icount->dcd++; 426 smp_wmb(); 427 } 428 if (new_msr & MOS_MSR_DELTA_RI) { 429 icount->rng++; 430 smp_wmb(); 431 } 432 } 433 } 434 435 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 436 { 437 struct async_icount *icount; 438 439 if (new_lsr & SERIAL_LSR_BI) { 440 /* 441 * Parity and Framing errors only count if they 442 * occur exclusive of a break being 443 * received. 444 */ 445 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 446 } 447 448 /* update input line counters */ 449 icount = &port->icount; 450 if (new_lsr & SERIAL_LSR_BI) { 451 icount->brk++; 452 smp_wmb(); 453 } 454 if (new_lsr & SERIAL_LSR_OE) { 455 icount->overrun++; 456 smp_wmb(); 457 } 458 if (new_lsr & SERIAL_LSR_PE) { 459 icount->parity++; 460 smp_wmb(); 461 } 462 if (new_lsr & SERIAL_LSR_FE) { 463 icount->frame++; 464 smp_wmb(); 465 } 466 } 467 468 /************************************************************************/ 469 /************************************************************************/ 470 /* U S B C A L L B A C K F U N C T I O N S */ 471 /* U S B C A L L B A C K F U N C T I O N S */ 472 /************************************************************************/ 473 /************************************************************************/ 474 475 static void mos7840_control_callback(struct urb *urb) 476 { 477 unsigned char *data; 478 struct moschip_port *mos7840_port; 479 struct device *dev = &urb->dev->dev; 480 __u8 regval = 0x0; 481 int result = 0; 482 int status = urb->status; 483 484 mos7840_port = urb->context; 485 486 switch (status) { 487 case 0: 488 /* success */ 489 break; 490 case -ECONNRESET: 491 case -ENOENT: 492 case -ESHUTDOWN: 493 /* this urb is terminated, clean up */ 494 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); 495 return; 496 default: 497 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); 498 goto exit; 499 } 500 501 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length); 502 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__, 503 mos7840_port->MsrLsr, mos7840_port->port_num); 504 data = urb->transfer_buffer; 505 regval = (__u8) data[0]; 506 dev_dbg(dev, "%s data is %x\n", __func__, regval); 507 if (mos7840_port->MsrLsr == 0) 508 mos7840_handle_new_msr(mos7840_port, regval); 509 else if (mos7840_port->MsrLsr == 1) 510 mos7840_handle_new_lsr(mos7840_port, regval); 511 512 exit: 513 spin_lock(&mos7840_port->pool_lock); 514 if (!mos7840_port->zombie) 515 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC); 516 spin_unlock(&mos7840_port->pool_lock); 517 if (result) { 518 dev_err(dev, "%s - Error %d submitting interrupt urb\n", 519 __func__, result); 520 } 521 } 522 523 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 524 __u16 *val) 525 { 526 struct usb_device *dev = mcs->port->serial->dev; 527 struct usb_ctrlrequest *dr = mcs->dr; 528 unsigned char *buffer = mcs->ctrl_buf; 529 int ret; 530 531 dr->bRequestType = MCS_RD_RTYPE; 532 dr->bRequest = MCS_RDREQ; 533 dr->wValue = cpu_to_le16(Wval); /* 0 */ 534 dr->wIndex = cpu_to_le16(reg); 535 dr->wLength = cpu_to_le16(2); 536 537 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 538 (unsigned char *)dr, buffer, 2, 539 mos7840_control_callback, mcs); 540 mcs->control_urb->transfer_buffer_length = 2; 541 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 542 return ret; 543 } 544 545 static void mos7840_set_led_callback(struct urb *urb) 546 { 547 switch (urb->status) { 548 case 0: 549 /* Success */ 550 break; 551 case -ECONNRESET: 552 case -ENOENT: 553 case -ESHUTDOWN: 554 /* This urb is terminated, clean up */ 555 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d", 556 __func__, urb->status); 557 break; 558 default: 559 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d", 560 __func__, urb->status); 561 } 562 } 563 564 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, 565 __u16 reg) 566 { 567 struct usb_device *dev = mcs->port->serial->dev; 568 struct usb_ctrlrequest *dr = mcs->dr; 569 570 dr->bRequestType = MCS_WR_RTYPE; 571 dr->bRequest = MCS_WRREQ; 572 dr->wValue = cpu_to_le16(wval); 573 dr->wIndex = cpu_to_le16(reg); 574 dr->wLength = cpu_to_le16(0); 575 576 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0), 577 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL); 578 579 usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 580 } 581 582 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, 583 __u16 val) 584 { 585 struct usb_device *dev = port->serial->dev; 586 587 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, 588 val, reg, NULL, 0, MOS_WDR_TIMEOUT); 589 } 590 591 static void mos7840_led_off(unsigned long arg) 592 { 593 struct moschip_port *mcs = (struct moschip_port *) arg; 594 595 /* Turn off LED */ 596 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER); 597 mod_timer(&mcs->led_timer2, 598 jiffies + msecs_to_jiffies(LED_OFF_MS)); 599 } 600 601 static void mos7840_led_flag_off(unsigned long arg) 602 { 603 struct moschip_port *mcs = (struct moschip_port *) arg; 604 605 mcs->led_flag = false; 606 } 607 608 /***************************************************************************** 609 * mos7840_interrupt_callback 610 * this is the callback function for when we have received data on the 611 * interrupt endpoint. 612 *****************************************************************************/ 613 614 static void mos7840_interrupt_callback(struct urb *urb) 615 { 616 int result; 617 int length; 618 struct moschip_port *mos7840_port; 619 struct usb_serial *serial; 620 __u16 Data; 621 unsigned char *data; 622 __u8 sp[5], st; 623 int i, rv = 0; 624 __u16 wval, wreg = 0; 625 int status = urb->status; 626 627 switch (status) { 628 case 0: 629 /* success */ 630 break; 631 case -ECONNRESET: 632 case -ENOENT: 633 case -ESHUTDOWN: 634 /* this urb is terminated, clean up */ 635 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 636 __func__, status); 637 return; 638 default: 639 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", 640 __func__, status); 641 goto exit; 642 } 643 644 length = urb->actual_length; 645 data = urb->transfer_buffer; 646 647 serial = urb->context; 648 649 /* Moschip get 5 bytes 650 * Byte 1 IIR Port 1 (port.number is 0) 651 * Byte 2 IIR Port 2 (port.number is 1) 652 * Byte 3 IIR Port 3 (port.number is 2) 653 * Byte 4 IIR Port 4 (port.number is 3) 654 * Byte 5 FIFO status for both */ 655 656 if (length && length > 5) { 657 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n"); 658 return; 659 } 660 661 sp[0] = (__u8) data[0]; 662 sp[1] = (__u8) data[1]; 663 sp[2] = (__u8) data[2]; 664 sp[3] = (__u8) data[3]; 665 st = (__u8) data[4]; 666 667 for (i = 0; i < serial->num_ports; i++) { 668 mos7840_port = mos7840_get_port_private(serial->port[i]); 669 wval = 670 (((__u16) serial->port[i]->number - 671 (__u16) (serial->minor)) + 1) << 8; 672 if (mos7840_port->open) { 673 if (sp[i] & 0x01) { 674 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i); 675 } else { 676 switch (sp[i] & 0x0f) { 677 case SERIAL_IIR_RLS: 678 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i); 679 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n"); 680 mos7840_port->MsrLsr = 1; 681 wreg = LINE_STATUS_REGISTER; 682 break; 683 case SERIAL_IIR_MS: 684 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i); 685 mos7840_port->MsrLsr = 0; 686 wreg = MODEM_STATUS_REGISTER; 687 break; 688 } 689 spin_lock(&mos7840_port->pool_lock); 690 if (!mos7840_port->zombie) { 691 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 692 } else { 693 spin_unlock(&mos7840_port->pool_lock); 694 return; 695 } 696 spin_unlock(&mos7840_port->pool_lock); 697 } 698 } 699 } 700 if (!(rv < 0)) 701 /* the completion handler for the control urb will resubmit */ 702 return; 703 exit: 704 result = usb_submit_urb(urb, GFP_ATOMIC); 705 if (result) { 706 dev_err(&urb->dev->dev, 707 "%s - Error %d submitting interrupt urb\n", 708 __func__, result); 709 } 710 } 711 712 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 713 const char *function) 714 { 715 if (!port) { 716 pr_debug("%s - port == NULL\n", function); 717 return -1; 718 } 719 if (!port->serial) { 720 pr_debug("%s - port->serial == NULL\n", function); 721 return -1; 722 } 723 724 return 0; 725 } 726 727 /* Inline functions to check the sanity of a pointer that is passed to us */ 728 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 729 const char *function) 730 { 731 if (!serial) { 732 pr_debug("%s - serial == NULL\n", function); 733 return -1; 734 } 735 if (!serial->type) { 736 pr_debug("%s - serial->type == NULL!\n", function); 737 return -1; 738 } 739 740 return 0; 741 } 742 743 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 744 const char *function) 745 { 746 /* if no port was specified, or it fails a paranoia check */ 747 if (!port || 748 mos7840_port_paranoia_check(port, function) || 749 mos7840_serial_paranoia_check(port->serial, function)) { 750 /* then say that we don't have a valid usb_serial thing, 751 * which will end up genrating -ENODEV return values */ 752 return NULL; 753 } 754 755 return port->serial; 756 } 757 758 /***************************************************************************** 759 * mos7840_bulk_in_callback 760 * this is the callback function for when we have received data on the 761 * bulk in endpoint. 762 *****************************************************************************/ 763 764 static void mos7840_bulk_in_callback(struct urb *urb) 765 { 766 int retval; 767 unsigned char *data; 768 struct usb_serial *serial; 769 struct usb_serial_port *port; 770 struct moschip_port *mos7840_port; 771 struct tty_struct *tty; 772 int status = urb->status; 773 774 mos7840_port = urb->context; 775 if (!mos7840_port) 776 return; 777 778 if (status) { 779 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); 780 mos7840_port->read_urb_busy = false; 781 return; 782 } 783 784 port = mos7840_port->port; 785 if (mos7840_port_paranoia_check(port, __func__)) { 786 mos7840_port->read_urb_busy = false; 787 return; 788 } 789 790 serial = mos7840_get_usb_serial(port, __func__); 791 if (!serial) { 792 mos7840_port->read_urb_busy = false; 793 return; 794 } 795 796 data = urb->transfer_buffer; 797 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); 798 799 if (urb->actual_length) { 800 tty = tty_port_tty_get(&mos7840_port->port->port); 801 if (tty) { 802 tty_insert_flip_string(tty, data, urb->actual_length); 803 tty_flip_buffer_push(tty); 804 tty_kref_put(tty); 805 } 806 mos7840_port->icount.rx += urb->actual_length; 807 smp_wmb(); 808 dev_dbg(&port->dev, "mos7840_port->icount.rx is %d:\n", mos7840_port->icount.rx); 809 } 810 811 if (!mos7840_port->read_urb) { 812 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n"); 813 mos7840_port->read_urb_busy = false; 814 return; 815 } 816 817 /* Turn on LED */ 818 if (mos7840_port->has_led && !mos7840_port->led_flag) { 819 mos7840_port->led_flag = true; 820 mos7840_set_led_async(mos7840_port, 0x0301, 821 MODEM_CONTROL_REGISTER); 822 mod_timer(&mos7840_port->led_timer1, 823 jiffies + msecs_to_jiffies(LED_ON_MS)); 824 } 825 826 mos7840_port->read_urb_busy = true; 827 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 828 829 if (retval) { 830 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); 831 mos7840_port->read_urb_busy = false; 832 } 833 } 834 835 /***************************************************************************** 836 * mos7840_bulk_out_data_callback 837 * this is the callback function for when we have finished sending 838 * serial data on the bulk out endpoint. 839 *****************************************************************************/ 840 841 static void mos7840_bulk_out_data_callback(struct urb *urb) 842 { 843 struct moschip_port *mos7840_port; 844 struct usb_serial_port *port; 845 struct tty_struct *tty; 846 int status = urb->status; 847 int i; 848 849 mos7840_port = urb->context; 850 port = mos7840_port->port; 851 spin_lock(&mos7840_port->pool_lock); 852 for (i = 0; i < NUM_URBS; i++) { 853 if (urb == mos7840_port->write_urb_pool[i]) { 854 mos7840_port->busy[i] = 0; 855 break; 856 } 857 } 858 spin_unlock(&mos7840_port->pool_lock); 859 860 if (status) { 861 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status); 862 return; 863 } 864 865 if (mos7840_port_paranoia_check(port, __func__)) 866 return; 867 868 tty = tty_port_tty_get(&port->port); 869 if (tty && mos7840_port->open) 870 tty_wakeup(tty); 871 tty_kref_put(tty); 872 873 } 874 875 /************************************************************************/ 876 /* 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 */ 877 /************************************************************************/ 878 #ifdef MCSSerialProbe 879 static int mos7840_serial_probe(struct usb_serial *serial, 880 const struct usb_device_id *id) 881 { 882 883 /*need to implement the mode_reg reading and updating\ 884 structures usb_serial_ device_type\ 885 (i.e num_ports, num_bulkin,bulkout etc) */ 886 /* Also we can update the changes attach */ 887 return 1; 888 } 889 #endif 890 891 /***************************************************************************** 892 * mos7840_open 893 * this function is called by the tty driver when a port is opened 894 * If successful, we return 0 895 * Otherwise we return a negative error number. 896 *****************************************************************************/ 897 898 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 899 { 900 int response; 901 int j; 902 struct usb_serial *serial; 903 struct urb *urb; 904 __u16 Data; 905 int status; 906 struct moschip_port *mos7840_port; 907 struct moschip_port *port0; 908 909 if (mos7840_port_paranoia_check(port, __func__)) 910 return -ENODEV; 911 912 serial = port->serial; 913 914 if (mos7840_serial_paranoia_check(serial, __func__)) 915 return -ENODEV; 916 917 mos7840_port = mos7840_get_port_private(port); 918 port0 = mos7840_get_port_private(serial->port[0]); 919 920 if (mos7840_port == NULL || port0 == NULL) 921 return -ENODEV; 922 923 usb_clear_halt(serial->dev, port->write_urb->pipe); 924 usb_clear_halt(serial->dev, port->read_urb->pipe); 925 port0->open_ports++; 926 927 /* Initialising the write urb pool */ 928 for (j = 0; j < NUM_URBS; ++j) { 929 urb = usb_alloc_urb(0, GFP_KERNEL); 930 mos7840_port->write_urb_pool[j] = urb; 931 932 if (urb == NULL) { 933 dev_err(&port->dev, "No more urbs???\n"); 934 continue; 935 } 936 937 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 938 GFP_KERNEL); 939 if (!urb->transfer_buffer) { 940 usb_free_urb(urb); 941 mos7840_port->write_urb_pool[j] = NULL; 942 dev_err(&port->dev, 943 "%s-out of memory for urb buffers.\n", 944 __func__); 945 continue; 946 } 947 } 948 949 /***************************************************************************** 950 * Initialize MCS7840 -- Write Init values to corresponding Registers 951 * 952 * Register Index 953 * 1 : IER 954 * 2 : FCR 955 * 3 : LCR 956 * 4 : MCR 957 * 958 * 0x08 : SP1/2 Control Reg 959 *****************************************************************************/ 960 961 /* NEED to check the following Block */ 962 963 Data = 0x0; 964 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 965 if (status < 0) { 966 dev_dbg(&port->dev, "Reading Spreg failed\n"); 967 return -1; 968 } 969 Data |= 0x80; 970 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 971 if (status < 0) { 972 dev_dbg(&port->dev, "writing Spreg failed\n"); 973 return -1; 974 } 975 976 Data &= ~0x80; 977 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 978 if (status < 0) { 979 dev_dbg(&port->dev, "writing Spreg failed\n"); 980 return -1; 981 } 982 /* End of block to be checked */ 983 984 Data = 0x0; 985 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 986 &Data); 987 if (status < 0) { 988 dev_dbg(&port->dev, "Reading Controlreg failed\n"); 989 return -1; 990 } 991 Data |= 0x08; /* Driver done bit */ 992 Data |= 0x20; /* rx_disable */ 993 status = mos7840_set_reg_sync(port, 994 mos7840_port->ControlRegOffset, Data); 995 if (status < 0) { 996 dev_dbg(&port->dev, "writing Controlreg failed\n"); 997 return -1; 998 } 999 /* do register settings here */ 1000 /* Set all regs to the device default values. */ 1001 /*********************************** 1002 * First Disable all interrupts. 1003 ***********************************/ 1004 Data = 0x00; 1005 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1006 if (status < 0) { 1007 dev_dbg(&port->dev, "disabling interrupts failed\n"); 1008 return -1; 1009 } 1010 /* Set FIFO_CONTROL_REGISTER to the default value */ 1011 Data = 0x00; 1012 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1013 if (status < 0) { 1014 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 1015 return -1; 1016 } 1017 1018 Data = 0xcf; 1019 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1020 if (status < 0) { 1021 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 1022 return -1; 1023 } 1024 1025 Data = 0x03; 1026 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1027 mos7840_port->shadowLCR = Data; 1028 1029 Data = 0x0b; 1030 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1031 mos7840_port->shadowMCR = Data; 1032 1033 Data = 0x00; 1034 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1035 mos7840_port->shadowLCR = Data; 1036 1037 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1038 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1039 1040 Data = 0x0c; 1041 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1042 1043 Data = 0x0; 1044 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1045 1046 Data = 0x00; 1047 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1048 1049 Data = Data & ~SERIAL_LCR_DLAB; 1050 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1051 mos7840_port->shadowLCR = Data; 1052 1053 /* clearing Bulkin and Bulkout Fifo */ 1054 Data = 0x0; 1055 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 1056 1057 Data = Data | 0x0c; 1058 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1059 1060 Data = Data & ~0x0c; 1061 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1062 /* Finally enable all interrupts */ 1063 Data = 0x0c; 1064 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1065 1066 /* clearing rx_disable */ 1067 Data = 0x0; 1068 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1069 &Data); 1070 Data = Data & ~0x20; 1071 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1072 Data); 1073 1074 /* rx_negate */ 1075 Data = 0x0; 1076 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1077 &Data); 1078 Data = Data | 0x10; 1079 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1080 Data); 1081 1082 /* Check to see if we've set up our endpoint info yet * 1083 * (can't set it up in mos7840_startup as the structures * 1084 * were not set up at that time.) */ 1085 if (port0->open_ports == 1) { 1086 if (serial->port[0]->interrupt_in_buffer == NULL) { 1087 /* set up interrupt urb */ 1088 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1089 serial->dev, 1090 usb_rcvintpipe(serial->dev, 1091 serial->port[0]->interrupt_in_endpointAddress), 1092 serial->port[0]->interrupt_in_buffer, 1093 serial->port[0]->interrupt_in_urb-> 1094 transfer_buffer_length, 1095 mos7840_interrupt_callback, 1096 serial, 1097 serial->port[0]->interrupt_in_urb->interval); 1098 1099 /* start interrupt read for mos7840 * 1100 * will continue as long as mos7840 is connected */ 1101 1102 response = 1103 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1104 GFP_KERNEL); 1105 if (response) { 1106 dev_err(&port->dev, "%s - Error %d submitting " 1107 "interrupt urb\n", __func__, response); 1108 } 1109 1110 } 1111 1112 } 1113 1114 /* see if we've set up our endpoint info yet * 1115 * (can't set it up in mos7840_startup as the * 1116 * structures were not set up at that time.) */ 1117 1118 dev_dbg(&port->dev, "port number is %d\n", port->number); 1119 dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor); 1120 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress); 1121 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress); 1122 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress); 1123 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num); 1124 mos7840_port->read_urb = port->read_urb; 1125 1126 /* set up our bulk in urb */ 1127 if ((serial->num_ports == 2) 1128 && ((((__u16)port->number - 1129 (__u16)(port->serial->minor)) % 2) != 0)) { 1130 usb_fill_bulk_urb(mos7840_port->read_urb, 1131 serial->dev, 1132 usb_rcvbulkpipe(serial->dev, 1133 (port->bulk_in_endpointAddress) + 2), 1134 port->bulk_in_buffer, 1135 mos7840_port->read_urb->transfer_buffer_length, 1136 mos7840_bulk_in_callback, mos7840_port); 1137 } else { 1138 usb_fill_bulk_urb(mos7840_port->read_urb, 1139 serial->dev, 1140 usb_rcvbulkpipe(serial->dev, 1141 port->bulk_in_endpointAddress), 1142 port->bulk_in_buffer, 1143 mos7840_port->read_urb->transfer_buffer_length, 1144 mos7840_bulk_in_callback, mos7840_port); 1145 } 1146 1147 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress); 1148 mos7840_port->read_urb_busy = true; 1149 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1150 if (response) { 1151 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1152 __func__, response); 1153 mos7840_port->read_urb_busy = false; 1154 } 1155 1156 /* initialize our wait queues */ 1157 init_waitqueue_head(&mos7840_port->wait_chase); 1158 init_waitqueue_head(&mos7840_port->delta_msr_wait); 1159 1160 /* initialize our icount structure */ 1161 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); 1162 1163 /* initialize our port settings */ 1164 /* Must set to enable ints! */ 1165 mos7840_port->shadowMCR = MCR_MASTER_IE; 1166 /* send a open port command */ 1167 mos7840_port->open = 1; 1168 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1169 mos7840_port->icount.tx = 0; 1170 mos7840_port->icount.rx = 0; 1171 1172 return 0; 1173 } 1174 1175 /***************************************************************************** 1176 * mos7840_chars_in_buffer 1177 * this function is called by the tty driver when it wants to know how many 1178 * bytes of data we currently have outstanding in the port (data that has 1179 * been written, but hasn't made it out the port yet) 1180 * If successful, we return the number of bytes left to be written in the 1181 * system, 1182 * Otherwise we return zero. 1183 *****************************************************************************/ 1184 1185 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1186 { 1187 struct usb_serial_port *port = tty->driver_data; 1188 int i; 1189 int chars = 0; 1190 unsigned long flags; 1191 struct moschip_port *mos7840_port; 1192 1193 if (mos7840_port_paranoia_check(port, __func__)) 1194 return 0; 1195 1196 mos7840_port = mos7840_get_port_private(port); 1197 if (mos7840_port == NULL) 1198 return 0; 1199 1200 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1201 for (i = 0; i < NUM_URBS; ++i) { 1202 if (mos7840_port->busy[i]) { 1203 struct urb *urb = mos7840_port->write_urb_pool[i]; 1204 chars += urb->transfer_buffer_length; 1205 } 1206 } 1207 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1208 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 1209 return chars; 1210 1211 } 1212 1213 /***************************************************************************** 1214 * mos7840_close 1215 * this function is called by the tty driver when a port is closed 1216 *****************************************************************************/ 1217 1218 static void mos7840_close(struct usb_serial_port *port) 1219 { 1220 struct usb_serial *serial; 1221 struct moschip_port *mos7840_port; 1222 struct moschip_port *port0; 1223 int j; 1224 __u16 Data; 1225 1226 if (mos7840_port_paranoia_check(port, __func__)) 1227 return; 1228 1229 serial = mos7840_get_usb_serial(port, __func__); 1230 if (!serial) 1231 return; 1232 1233 mos7840_port = mos7840_get_port_private(port); 1234 port0 = mos7840_get_port_private(serial->port[0]); 1235 1236 if (mos7840_port == NULL || port0 == NULL) 1237 return; 1238 1239 for (j = 0; j < NUM_URBS; ++j) 1240 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1241 1242 /* Freeing Write URBs */ 1243 for (j = 0; j < NUM_URBS; ++j) { 1244 if (mos7840_port->write_urb_pool[j]) { 1245 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1246 kfree(mos7840_port->write_urb_pool[j]-> 1247 transfer_buffer); 1248 1249 usb_free_urb(mos7840_port->write_urb_pool[j]); 1250 } 1251 } 1252 1253 /* While closing port, shutdown all bulk read, write * 1254 * and interrupt read if they exists */ 1255 if (serial->dev) { 1256 if (mos7840_port->write_urb) { 1257 dev_dbg(&port->dev, "%s", "Shutdown bulk write\n"); 1258 usb_kill_urb(mos7840_port->write_urb); 1259 } 1260 if (mos7840_port->read_urb) { 1261 dev_dbg(&port->dev, "%s", "Shutdown bulk read\n"); 1262 usb_kill_urb(mos7840_port->read_urb); 1263 mos7840_port->read_urb_busy = false; 1264 } 1265 if ((&mos7840_port->control_urb)) { 1266 dev_dbg(&port->dev, "%s", "Shutdown control read\n"); 1267 /*/ usb_kill_urb (mos7840_port->control_urb); */ 1268 } 1269 } 1270 /* if(mos7840_port->ctrl_buf != NULL) */ 1271 /* kfree(mos7840_port->ctrl_buf); */ 1272 port0->open_ports--; 1273 dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number); 1274 if (port0->open_ports == 0) { 1275 if (serial->port[0]->interrupt_in_urb) { 1276 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n"); 1277 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1278 } 1279 } 1280 1281 if (mos7840_port->write_urb) { 1282 /* if this urb had a transfer buffer already (old tx) free it */ 1283 if (mos7840_port->write_urb->transfer_buffer != NULL) 1284 kfree(mos7840_port->write_urb->transfer_buffer); 1285 usb_free_urb(mos7840_port->write_urb); 1286 } 1287 1288 Data = 0x0; 1289 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1290 1291 Data = 0x00; 1292 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1293 1294 mos7840_port->open = 0; 1295 } 1296 1297 /************************************************************************ 1298 * 1299 * mos7840_block_until_chase_response 1300 * 1301 * This function will block the close until one of the following: 1302 * 1. Response to our Chase comes from mos7840 1303 * 2. A timeout of 10 seconds without activity has expired 1304 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1305 * 1306 ************************************************************************/ 1307 1308 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1309 struct moschip_port *mos7840_port) 1310 { 1311 int timeout = msecs_to_jiffies(1000); 1312 int wait = 10; 1313 int count; 1314 1315 while (1) { 1316 count = mos7840_chars_in_buffer(tty); 1317 1318 /* Check for Buffer status */ 1319 if (count <= 0) 1320 return; 1321 1322 /* Block the thread for a while */ 1323 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1324 timeout); 1325 /* No activity.. count down section */ 1326 wait--; 1327 if (wait == 0) { 1328 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__); 1329 return; 1330 } else { 1331 /* Reset timeout value back to seconds */ 1332 wait = 10; 1333 } 1334 } 1335 1336 } 1337 1338 /***************************************************************************** 1339 * mos7840_break 1340 * this function sends a break to the port 1341 *****************************************************************************/ 1342 static void mos7840_break(struct tty_struct *tty, int break_state) 1343 { 1344 struct usb_serial_port *port = tty->driver_data; 1345 unsigned char data; 1346 struct usb_serial *serial; 1347 struct moschip_port *mos7840_port; 1348 1349 if (mos7840_port_paranoia_check(port, __func__)) 1350 return; 1351 1352 serial = mos7840_get_usb_serial(port, __func__); 1353 if (!serial) 1354 return; 1355 1356 mos7840_port = mos7840_get_port_private(port); 1357 1358 if (mos7840_port == NULL) 1359 return; 1360 1361 if (serial->dev) 1362 /* flush and block until tx is empty */ 1363 mos7840_block_until_chase_response(tty, mos7840_port); 1364 1365 if (break_state == -1) 1366 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1367 else 1368 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1369 1370 /* FIXME: no locking on shadowLCR anywhere in driver */ 1371 mos7840_port->shadowLCR = data; 1372 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1373 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1374 mos7840_port->shadowLCR); 1375 } 1376 1377 /***************************************************************************** 1378 * mos7840_write_room 1379 * this function is called by the tty driver when it wants to know how many 1380 * bytes of data we can accept for a specific port. 1381 * If successful, we return the amount of room that we have for this port 1382 * Otherwise we return a negative error number. 1383 *****************************************************************************/ 1384 1385 static int mos7840_write_room(struct tty_struct *tty) 1386 { 1387 struct usb_serial_port *port = tty->driver_data; 1388 int i; 1389 int room = 0; 1390 unsigned long flags; 1391 struct moschip_port *mos7840_port; 1392 1393 if (mos7840_port_paranoia_check(port, __func__)) 1394 return -1; 1395 1396 mos7840_port = mos7840_get_port_private(port); 1397 if (mos7840_port == NULL) 1398 return -1; 1399 1400 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1401 for (i = 0; i < NUM_URBS; ++i) { 1402 if (!mos7840_port->busy[i]) 1403 room += URB_TRANSFER_BUFFER_SIZE; 1404 } 1405 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1406 1407 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1408 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); 1409 return room; 1410 1411 } 1412 1413 /***************************************************************************** 1414 * mos7840_write 1415 * this function is called by the tty driver when data should be written to 1416 * the port. 1417 * If successful, we return the number of bytes written, otherwise we 1418 * return a negative error number. 1419 *****************************************************************************/ 1420 1421 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1422 const unsigned char *data, int count) 1423 { 1424 int status; 1425 int i; 1426 int bytes_sent = 0; 1427 int transfer_size; 1428 unsigned long flags; 1429 1430 struct moschip_port *mos7840_port; 1431 struct usb_serial *serial; 1432 struct urb *urb; 1433 /* __u16 Data; */ 1434 const unsigned char *current_position = data; 1435 unsigned char *data1; 1436 1437 #ifdef NOTMOS7840 1438 Data = 0x00; 1439 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1440 mos7840_port->shadowLCR = Data; 1441 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data); 1442 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1443 1444 /* Data = 0x03; */ 1445 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1446 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1447 1448 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1449 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1450 1451 /* Data = 0x0c; */ 1452 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1453 Data = 0x00; 1454 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1455 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data); 1456 1457 Data = 0x0; 1458 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1459 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data); 1460 1461 Data = Data & ~SERIAL_LCR_DLAB; 1462 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1463 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1464 #endif 1465 1466 if (mos7840_port_paranoia_check(port, __func__)) 1467 return -1; 1468 1469 serial = port->serial; 1470 if (mos7840_serial_paranoia_check(serial, __func__)) 1471 return -1; 1472 1473 mos7840_port = mos7840_get_port_private(port); 1474 if (mos7840_port == NULL) 1475 return -1; 1476 1477 /* try to find a free urb in the list */ 1478 urb = NULL; 1479 1480 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1481 for (i = 0; i < NUM_URBS; ++i) { 1482 if (!mos7840_port->busy[i]) { 1483 mos7840_port->busy[i] = 1; 1484 urb = mos7840_port->write_urb_pool[i]; 1485 dev_dbg(&port->dev, "URB:%d\n", i); 1486 break; 1487 } 1488 } 1489 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1490 1491 if (urb == NULL) { 1492 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); 1493 goto exit; 1494 } 1495 1496 if (urb->transfer_buffer == NULL) { 1497 urb->transfer_buffer = 1498 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1499 1500 if (urb->transfer_buffer == NULL) { 1501 dev_err_console(port, "%s no more kernel memory...\n", 1502 __func__); 1503 goto exit; 1504 } 1505 } 1506 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1507 1508 memcpy(urb->transfer_buffer, current_position, transfer_size); 1509 1510 /* fill urb with data and submit */ 1511 if ((serial->num_ports == 2) 1512 && ((((__u16)port->number - 1513 (__u16)(port->serial->minor)) % 2) != 0)) { 1514 usb_fill_bulk_urb(urb, 1515 serial->dev, 1516 usb_sndbulkpipe(serial->dev, 1517 (port->bulk_out_endpointAddress) + 2), 1518 urb->transfer_buffer, 1519 transfer_size, 1520 mos7840_bulk_out_data_callback, mos7840_port); 1521 } else { 1522 usb_fill_bulk_urb(urb, 1523 serial->dev, 1524 usb_sndbulkpipe(serial->dev, 1525 port->bulk_out_endpointAddress), 1526 urb->transfer_buffer, 1527 transfer_size, 1528 mos7840_bulk_out_data_callback, mos7840_port); 1529 } 1530 1531 data1 = urb->transfer_buffer; 1532 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); 1533 1534 /* Turn on LED */ 1535 if (mos7840_port->has_led && !mos7840_port->led_flag) { 1536 mos7840_port->led_flag = true; 1537 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301); 1538 mod_timer(&mos7840_port->led_timer1, 1539 jiffies + msecs_to_jiffies(LED_ON_MS)); 1540 } 1541 1542 /* send it down the pipe */ 1543 status = usb_submit_urb(urb, GFP_ATOMIC); 1544 1545 if (status) { 1546 mos7840_port->busy[i] = 0; 1547 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 1548 "with status = %d\n", __func__, status); 1549 bytes_sent = status; 1550 goto exit; 1551 } 1552 bytes_sent = transfer_size; 1553 mos7840_port->icount.tx += transfer_size; 1554 smp_wmb(); 1555 dev_dbg(&port->dev, "mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx); 1556 exit: 1557 return bytes_sent; 1558 1559 } 1560 1561 /***************************************************************************** 1562 * mos7840_throttle 1563 * this function is called by the tty driver when it wants to stop the data 1564 * being read from the port. 1565 *****************************************************************************/ 1566 1567 static void mos7840_throttle(struct tty_struct *tty) 1568 { 1569 struct usb_serial_port *port = tty->driver_data; 1570 struct moschip_port *mos7840_port; 1571 int status; 1572 1573 if (mos7840_port_paranoia_check(port, __func__)) 1574 return; 1575 1576 mos7840_port = mos7840_get_port_private(port); 1577 1578 if (mos7840_port == NULL) 1579 return; 1580 1581 if (!mos7840_port->open) { 1582 dev_dbg(&port->dev, "%s", "port not opened\n"); 1583 return; 1584 } 1585 1586 /* if we are implementing XON/XOFF, send the stop character */ 1587 if (I_IXOFF(tty)) { 1588 unsigned char stop_char = STOP_CHAR(tty); 1589 status = mos7840_write(tty, port, &stop_char, 1); 1590 if (status <= 0) 1591 return; 1592 } 1593 /* if we are implementing RTS/CTS, toggle that line */ 1594 if (tty->termios.c_cflag & CRTSCTS) { 1595 mos7840_port->shadowMCR &= ~MCR_RTS; 1596 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1597 mos7840_port->shadowMCR); 1598 if (status < 0) 1599 return; 1600 } 1601 } 1602 1603 /***************************************************************************** 1604 * mos7840_unthrottle 1605 * this function is called by the tty driver when it wants to resume 1606 * the data being read from the port (called after mos7840_throttle is 1607 * called) 1608 *****************************************************************************/ 1609 static void mos7840_unthrottle(struct tty_struct *tty) 1610 { 1611 struct usb_serial_port *port = tty->driver_data; 1612 int status; 1613 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1614 1615 if (mos7840_port_paranoia_check(port, __func__)) 1616 return; 1617 1618 if (mos7840_port == NULL) 1619 return; 1620 1621 if (!mos7840_port->open) { 1622 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1623 return; 1624 } 1625 1626 /* if we are implementing XON/XOFF, send the start character */ 1627 if (I_IXOFF(tty)) { 1628 unsigned char start_char = START_CHAR(tty); 1629 status = mos7840_write(tty, port, &start_char, 1); 1630 if (status <= 0) 1631 return; 1632 } 1633 1634 /* if we are implementing RTS/CTS, toggle that line */ 1635 if (tty->termios.c_cflag & CRTSCTS) { 1636 mos7840_port->shadowMCR |= MCR_RTS; 1637 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1638 mos7840_port->shadowMCR); 1639 if (status < 0) 1640 return; 1641 } 1642 } 1643 1644 static int mos7840_tiocmget(struct tty_struct *tty) 1645 { 1646 struct usb_serial_port *port = tty->driver_data; 1647 struct moschip_port *mos7840_port; 1648 unsigned int result; 1649 __u16 msr; 1650 __u16 mcr; 1651 int status; 1652 mos7840_port = mos7840_get_port_private(port); 1653 1654 if (mos7840_port == NULL) 1655 return -ENODEV; 1656 1657 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1658 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1659 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1660 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1661 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1662 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1663 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1664 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1665 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1666 1667 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 1668 1669 return result; 1670 } 1671 1672 static int mos7840_tiocmset(struct tty_struct *tty, 1673 unsigned int set, unsigned int clear) 1674 { 1675 struct usb_serial_port *port = tty->driver_data; 1676 struct moschip_port *mos7840_port; 1677 unsigned int mcr; 1678 int status; 1679 1680 mos7840_port = mos7840_get_port_private(port); 1681 1682 if (mos7840_port == NULL) 1683 return -ENODEV; 1684 1685 /* FIXME: What locks the port registers ? */ 1686 mcr = mos7840_port->shadowMCR; 1687 if (clear & TIOCM_RTS) 1688 mcr &= ~MCR_RTS; 1689 if (clear & TIOCM_DTR) 1690 mcr &= ~MCR_DTR; 1691 if (clear & TIOCM_LOOP) 1692 mcr &= ~MCR_LOOPBACK; 1693 1694 if (set & TIOCM_RTS) 1695 mcr |= MCR_RTS; 1696 if (set & TIOCM_DTR) 1697 mcr |= MCR_DTR; 1698 if (set & TIOCM_LOOP) 1699 mcr |= MCR_LOOPBACK; 1700 1701 mos7840_port->shadowMCR = mcr; 1702 1703 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1704 if (status < 0) { 1705 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); 1706 return status; 1707 } 1708 1709 return 0; 1710 } 1711 1712 /***************************************************************************** 1713 * mos7840_calc_baud_rate_divisor 1714 * this function calculates the proper baud rate divisor for the specified 1715 * baud rate. 1716 *****************************************************************************/ 1717 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, 1718 int baudRate, int *divisor, 1719 __u16 *clk_sel_val) 1720 { 1721 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); 1722 1723 if (baudRate <= 115200) { 1724 *divisor = 115200 / baudRate; 1725 *clk_sel_val = 0x0; 1726 } 1727 if ((baudRate > 115200) && (baudRate <= 230400)) { 1728 *divisor = 230400 / baudRate; 1729 *clk_sel_val = 0x10; 1730 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1731 *divisor = 403200 / baudRate; 1732 *clk_sel_val = 0x20; 1733 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1734 *divisor = 460800 / baudRate; 1735 *clk_sel_val = 0x30; 1736 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1737 *divisor = 806400 / baudRate; 1738 *clk_sel_val = 0x40; 1739 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1740 *divisor = 921600 / baudRate; 1741 *clk_sel_val = 0x50; 1742 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1743 *divisor = 1572864 / baudRate; 1744 *clk_sel_val = 0x60; 1745 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1746 *divisor = 3145728 / baudRate; 1747 *clk_sel_val = 0x70; 1748 } 1749 return 0; 1750 1751 #ifdef NOTMCS7840 1752 1753 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1754 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1755 *divisor = mos7840_divisor_table[i].Divisor; 1756 return 0; 1757 } 1758 } 1759 1760 /* After trying for all the standard baud rates * 1761 * Try calculating the divisor for this baud rate */ 1762 1763 if (baudrate > 75 && baudrate < 230400) { 1764 /* get the divisor */ 1765 custom = (__u16) (230400L / baudrate); 1766 1767 /* Check for round off */ 1768 round1 = (__u16) (2304000L / baudrate); 1769 round = (__u16) (round1 - (custom * 10)); 1770 if (round > 4) 1771 custom++; 1772 *divisor = custom; 1773 1774 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom); 1775 return 0; 1776 } 1777 1778 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n"); 1779 return -1; 1780 #endif 1781 } 1782 1783 /***************************************************************************** 1784 * mos7840_send_cmd_write_baud_rate 1785 * this function sends the proper command to change the baud rate of the 1786 * specified port. 1787 *****************************************************************************/ 1788 1789 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1790 int baudRate) 1791 { 1792 int divisor = 0; 1793 int status; 1794 __u16 Data; 1795 unsigned char number; 1796 __u16 clk_sel_val; 1797 struct usb_serial_port *port; 1798 1799 if (mos7840_port == NULL) 1800 return -1; 1801 1802 port = mos7840_port->port; 1803 if (mos7840_port_paranoia_check(port, __func__)) 1804 return -1; 1805 1806 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1807 return -1; 1808 1809 number = mos7840_port->port->number - mos7840_port->port->serial->minor; 1810 1811 dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__, 1812 mos7840_port->port->number, baudRate); 1813 /* reset clk_uart_sel in spregOffset */ 1814 if (baudRate > 115200) { 1815 #ifdef HW_flow_control 1816 /* NOTE: need to see the pther register to modify */ 1817 /* setting h/w flow control bit to 1 */ 1818 Data = 0x2b; 1819 mos7840_port->shadowMCR = Data; 1820 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1821 Data); 1822 if (status < 0) { 1823 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1824 return -1; 1825 } 1826 #endif 1827 1828 } else { 1829 #ifdef HW_flow_control 1830 /* setting h/w flow control bit to 0 */ 1831 Data = 0xb; 1832 mos7840_port->shadowMCR = Data; 1833 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1834 Data); 1835 if (status < 0) { 1836 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1837 return -1; 1838 } 1839 #endif 1840 1841 } 1842 1843 if (1) { /* baudRate <= 115200) */ 1844 clk_sel_val = 0x0; 1845 Data = 0x0; 1846 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, 1847 &clk_sel_val); 1848 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1849 &Data); 1850 if (status < 0) { 1851 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); 1852 return -1; 1853 } 1854 Data = (Data & 0x8f) | clk_sel_val; 1855 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1856 Data); 1857 if (status < 0) { 1858 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1859 return -1; 1860 } 1861 /* Calculate the Divisor */ 1862 1863 if (status) { 1864 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1865 return status; 1866 } 1867 /* Enable access to divisor latch */ 1868 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1869 mos7840_port->shadowLCR = Data; 1870 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1871 1872 /* Write the divisor */ 1873 Data = (unsigned char)(divisor & 0xff); 1874 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); 1875 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1876 1877 Data = (unsigned char)((divisor & 0xff00) >> 8); 1878 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); 1879 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1880 1881 /* Disable access to divisor latch */ 1882 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1883 mos7840_port->shadowLCR = Data; 1884 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1885 1886 } 1887 return status; 1888 } 1889 1890 /***************************************************************************** 1891 * mos7840_change_port_settings 1892 * This routine is called to set the UART on the device to match 1893 * the specified new settings. 1894 *****************************************************************************/ 1895 1896 static void mos7840_change_port_settings(struct tty_struct *tty, 1897 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1898 { 1899 int baud; 1900 unsigned cflag; 1901 unsigned iflag; 1902 __u8 lData; 1903 __u8 lParity; 1904 __u8 lStop; 1905 int status; 1906 __u16 Data; 1907 struct usb_serial_port *port; 1908 struct usb_serial *serial; 1909 1910 if (mos7840_port == NULL) 1911 return; 1912 1913 port = mos7840_port->port; 1914 1915 if (mos7840_port_paranoia_check(port, __func__)) 1916 return; 1917 1918 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1919 return; 1920 1921 serial = port->serial; 1922 1923 if (!mos7840_port->open) { 1924 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1925 return; 1926 } 1927 1928 lData = LCR_BITS_8; 1929 lStop = LCR_STOP_1; 1930 lParity = LCR_PAR_NONE; 1931 1932 cflag = tty->termios.c_cflag; 1933 iflag = tty->termios.c_iflag; 1934 1935 /* Change the number of bits */ 1936 if (cflag & CSIZE) { 1937 switch (cflag & CSIZE) { 1938 case CS5: 1939 lData = LCR_BITS_5; 1940 break; 1941 1942 case CS6: 1943 lData = LCR_BITS_6; 1944 break; 1945 1946 case CS7: 1947 lData = LCR_BITS_7; 1948 break; 1949 default: 1950 case CS8: 1951 lData = LCR_BITS_8; 1952 break; 1953 } 1954 } 1955 /* Change the Parity bit */ 1956 if (cflag & PARENB) { 1957 if (cflag & PARODD) { 1958 lParity = LCR_PAR_ODD; 1959 dev_dbg(&port->dev, "%s - parity = odd\n", __func__); 1960 } else { 1961 lParity = LCR_PAR_EVEN; 1962 dev_dbg(&port->dev, "%s - parity = even\n", __func__); 1963 } 1964 1965 } else { 1966 dev_dbg(&port->dev, "%s - parity = none\n", __func__); 1967 } 1968 1969 if (cflag & CMSPAR) 1970 lParity = lParity | 0x20; 1971 1972 /* Change the Stop bit */ 1973 if (cflag & CSTOPB) { 1974 lStop = LCR_STOP_2; 1975 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); 1976 } else { 1977 lStop = LCR_STOP_1; 1978 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); 1979 } 1980 1981 /* Update the LCR with the correct value */ 1982 mos7840_port->shadowLCR &= 1983 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1984 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1985 1986 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, 1987 mos7840_port->shadowLCR); 1988 /* Disable Interrupts */ 1989 Data = 0x00; 1990 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1991 1992 Data = 0x00; 1993 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1994 1995 Data = 0xcf; 1996 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1997 1998 /* Send the updated LCR value to the mos7840 */ 1999 Data = mos7840_port->shadowLCR; 2000 2001 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 2002 2003 Data = 0x00b; 2004 mos7840_port->shadowMCR = Data; 2005 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2006 Data = 0x00b; 2007 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2008 2009 /* set up the MCR register and send it to the mos7840 */ 2010 2011 mos7840_port->shadowMCR = MCR_MASTER_IE; 2012 if (cflag & CBAUD) 2013 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 2014 2015 if (cflag & CRTSCTS) 2016 mos7840_port->shadowMCR |= (MCR_XON_ANY); 2017 else 2018 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 2019 2020 Data = mos7840_port->shadowMCR; 2021 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2022 2023 /* Determine divisor based on baud rate */ 2024 baud = tty_get_baud_rate(tty); 2025 2026 if (!baud) { 2027 /* pick a default, any default... */ 2028 dev_dbg(&port->dev, "%s", "Picked default baud...\n"); 2029 baud = 9600; 2030 } 2031 2032 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); 2033 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 2034 2035 /* Enable Interrupts */ 2036 Data = 0x0c; 2037 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2038 2039 if (mos7840_port->read_urb_busy == false) { 2040 mos7840_port->read_urb_busy = true; 2041 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2042 if (status) { 2043 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 2044 status); 2045 mos7840_port->read_urb_busy = false; 2046 } 2047 } 2048 wake_up(&mos7840_port->delta_msr_wait); 2049 mos7840_port->delta_msr_cond = 1; 2050 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, 2051 mos7840_port->shadowLCR); 2052 } 2053 2054 /***************************************************************************** 2055 * mos7840_set_termios 2056 * this function is called by the tty driver when it wants to change 2057 * the termios structure 2058 *****************************************************************************/ 2059 2060 static void mos7840_set_termios(struct tty_struct *tty, 2061 struct usb_serial_port *port, 2062 struct ktermios *old_termios) 2063 { 2064 int status; 2065 unsigned int cflag; 2066 struct usb_serial *serial; 2067 struct moschip_port *mos7840_port; 2068 2069 if (mos7840_port_paranoia_check(port, __func__)) 2070 return; 2071 2072 serial = port->serial; 2073 2074 if (mos7840_serial_paranoia_check(serial, __func__)) 2075 return; 2076 2077 mos7840_port = mos7840_get_port_private(port); 2078 2079 if (mos7840_port == NULL) 2080 return; 2081 2082 if (!mos7840_port->open) { 2083 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 2084 return; 2085 } 2086 2087 dev_dbg(&port->dev, "%s", "setting termios - \n"); 2088 2089 cflag = tty->termios.c_cflag; 2090 2091 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, 2092 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); 2093 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, 2094 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2095 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number); 2096 2097 /* change the port settings to the new ones specified */ 2098 2099 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2100 2101 if (!mos7840_port->read_urb) { 2102 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n"); 2103 return; 2104 } 2105 2106 if (mos7840_port->read_urb_busy == false) { 2107 mos7840_port->read_urb_busy = true; 2108 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2109 if (status) { 2110 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 2111 status); 2112 mos7840_port->read_urb_busy = false; 2113 } 2114 } 2115 } 2116 2117 /***************************************************************************** 2118 * mos7840_get_lsr_info - get line status register info 2119 * 2120 * Purpose: Let user call ioctl() to get info when the UART physically 2121 * is emptied. On bus types like RS485, the transmitter must 2122 * release the bus after transmitting. This must be done when 2123 * the transmit shift register is empty, not be done when the 2124 * transmit holding register is empty. This functionality 2125 * allows an RS485 driver to be written in user space. 2126 *****************************************************************************/ 2127 2128 static int mos7840_get_lsr_info(struct tty_struct *tty, 2129 unsigned int __user *value) 2130 { 2131 int count; 2132 unsigned int result = 0; 2133 2134 count = mos7840_chars_in_buffer(tty); 2135 if (count == 0) 2136 result = TIOCSER_TEMT; 2137 2138 if (copy_to_user(value, &result, sizeof(int))) 2139 return -EFAULT; 2140 return 0; 2141 } 2142 2143 /***************************************************************************** 2144 * mos7840_get_serial_info 2145 * function to get information about serial port 2146 *****************************************************************************/ 2147 2148 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2149 struct serial_struct __user *retinfo) 2150 { 2151 struct serial_struct tmp; 2152 2153 if (mos7840_port == NULL) 2154 return -1; 2155 2156 if (!retinfo) 2157 return -EFAULT; 2158 2159 memset(&tmp, 0, sizeof(tmp)); 2160 2161 tmp.type = PORT_16550A; 2162 tmp.line = mos7840_port->port->serial->minor; 2163 tmp.port = mos7840_port->port->number; 2164 tmp.irq = 0; 2165 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2166 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2167 tmp.baud_base = 9600; 2168 tmp.close_delay = 5 * HZ; 2169 tmp.closing_wait = 30 * HZ; 2170 2171 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2172 return -EFAULT; 2173 return 0; 2174 } 2175 2176 static int mos7840_get_icount(struct tty_struct *tty, 2177 struct serial_icounter_struct *icount) 2178 { 2179 struct usb_serial_port *port = tty->driver_data; 2180 struct moschip_port *mos7840_port; 2181 struct async_icount cnow; 2182 2183 mos7840_port = mos7840_get_port_private(port); 2184 cnow = mos7840_port->icount; 2185 2186 smp_rmb(); 2187 icount->cts = cnow.cts; 2188 icount->dsr = cnow.dsr; 2189 icount->rng = cnow.rng; 2190 icount->dcd = cnow.dcd; 2191 icount->rx = cnow.rx; 2192 icount->tx = cnow.tx; 2193 icount->frame = cnow.frame; 2194 icount->overrun = cnow.overrun; 2195 icount->parity = cnow.parity; 2196 icount->brk = cnow.brk; 2197 icount->buf_overrun = cnow.buf_overrun; 2198 2199 dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", __func__, 2200 icount->rx, icount->tx); 2201 return 0; 2202 } 2203 2204 /***************************************************************************** 2205 * SerialIoctl 2206 * this function handles any ioctl calls to the driver 2207 *****************************************************************************/ 2208 2209 static int mos7840_ioctl(struct tty_struct *tty, 2210 unsigned int cmd, unsigned long arg) 2211 { 2212 struct usb_serial_port *port = tty->driver_data; 2213 void __user *argp = (void __user *)arg; 2214 struct moschip_port *mos7840_port; 2215 2216 struct async_icount cnow; 2217 struct async_icount cprev; 2218 2219 if (mos7840_port_paranoia_check(port, __func__)) 2220 return -1; 2221 2222 mos7840_port = mos7840_get_port_private(port); 2223 2224 if (mos7840_port == NULL) 2225 return -1; 2226 2227 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd); 2228 2229 switch (cmd) { 2230 /* return number of bytes available */ 2231 2232 case TIOCSERGETLSR: 2233 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 2234 return mos7840_get_lsr_info(tty, argp); 2235 2236 case TIOCGSERIAL: 2237 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); 2238 return mos7840_get_serial_info(mos7840_port, argp); 2239 2240 case TIOCSSERIAL: 2241 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__); 2242 break; 2243 2244 case TIOCMIWAIT: 2245 dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__); 2246 cprev = mos7840_port->icount; 2247 while (1) { 2248 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ 2249 mos7840_port->delta_msr_cond = 0; 2250 wait_event_interruptible(mos7840_port->delta_msr_wait, 2251 (mos7840_port-> 2252 delta_msr_cond == 1)); 2253 2254 /* see if a signal did it */ 2255 if (signal_pending(current)) 2256 return -ERESTARTSYS; 2257 cnow = mos7840_port->icount; 2258 smp_rmb(); 2259 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2260 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2261 return -EIO; /* no change => error */ 2262 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2263 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2264 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2265 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2266 return 0; 2267 } 2268 cprev = cnow; 2269 } 2270 /* NOTREACHED */ 2271 break; 2272 2273 default: 2274 break; 2275 } 2276 return -ENOIOCTLCMD; 2277 } 2278 2279 static int mos7810_check(struct usb_serial *serial) 2280 { 2281 int i, pass_count = 0; 2282 __u16 data = 0, mcr_data = 0; 2283 __u16 test_pattern = 0x55AA; 2284 2285 /* Store MCR setting */ 2286 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2287 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, 2288 &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2289 2290 for (i = 0; i < 16; i++) { 2291 /* Send the 1-bit test pattern out to MCS7810 test pin */ 2292 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2293 MCS_WRREQ, MCS_WR_RTYPE, 2294 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), 2295 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); 2296 2297 /* Read the test pattern back */ 2298 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2299 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data, 2300 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2301 2302 /* If this is a MCS7810 device, both test patterns must match */ 2303 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) 2304 break; 2305 2306 pass_count++; 2307 } 2308 2309 /* Restore MCR setting */ 2310 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, 2311 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 2312 0, MOS_WDR_TIMEOUT); 2313 2314 if (pass_count == 16) 2315 return 1; 2316 2317 return 0; 2318 } 2319 2320 static int mos7840_calc_num_ports(struct usb_serial *serial) 2321 { 2322 __u16 data = 0x00; 2323 int mos7840_num_ports; 2324 2325 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2326 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data, 2327 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2328 2329 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 || 2330 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) { 2331 device_type = serial->dev->descriptor.idProduct; 2332 } else { 2333 /* For a MCS7840 device GPIO0 must be set to 1 */ 2334 if ((data & 0x01) == 1) 2335 device_type = MOSCHIP_DEVICE_ID_7840; 2336 else if (mos7810_check(serial)) 2337 device_type = MOSCHIP_DEVICE_ID_7810; 2338 else 2339 device_type = MOSCHIP_DEVICE_ID_7820; 2340 } 2341 2342 mos7840_num_ports = (device_type >> 4) & 0x000F; 2343 serial->num_bulk_in = mos7840_num_ports; 2344 serial->num_bulk_out = mos7840_num_ports; 2345 serial->num_ports = mos7840_num_ports; 2346 2347 return mos7840_num_ports; 2348 } 2349 2350 /**************************************************************************** 2351 * mos7840_startup 2352 ****************************************************************************/ 2353 2354 static int mos7840_startup(struct usb_serial *serial) 2355 { 2356 struct moschip_port *mos7840_port; 2357 struct usb_device *dev; 2358 int i, status; 2359 __u16 Data; 2360 2361 dev = serial->dev; 2362 2363 /* we set up the pointers to the endpoints in the mos7840_open * 2364 * function, as the structures aren't created yet. */ 2365 2366 /* set up port private structures */ 2367 for (i = 0; i < serial->num_ports; ++i) { 2368 dev_dbg(&dev->dev, "mos7840_startup: configuring port %d............\n", i); 2369 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2370 if (mos7840_port == NULL) { 2371 dev_err(&dev->dev, "%s - Out of memory\n", __func__); 2372 status = -ENOMEM; 2373 i--; /* don't follow NULL pointer cleaning up */ 2374 goto error; 2375 } 2376 2377 /* Initialize all port interrupt end point to port 0 int 2378 * endpoint. Our device has only one interrupt end point 2379 * common to all port */ 2380 2381 mos7840_port->port = serial->port[i]; 2382 mos7840_set_port_private(serial->port[i], mos7840_port); 2383 spin_lock_init(&mos7840_port->pool_lock); 2384 2385 /* minor is not initialised until later by 2386 * usb-serial.c:get_free_serial() and cannot therefore be used 2387 * to index device instances */ 2388 mos7840_port->port_num = i + 1; 2389 dev_dbg(&dev->dev, "serial->port[i]->number = %d\n", serial->port[i]->number); 2390 dev_dbg(&dev->dev, "serial->port[i]->serial->minor = %d\n", serial->port[i]->serial->minor); 2391 dev_dbg(&dev->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); 2392 dev_dbg(&dev->dev, "serial->minor = %d\n", serial->minor); 2393 2394 if (mos7840_port->port_num == 1) { 2395 mos7840_port->SpRegOffset = 0x0; 2396 mos7840_port->ControlRegOffset = 0x1; 2397 mos7840_port->DcrRegOffset = 0x4; 2398 } else if ((mos7840_port->port_num == 2) 2399 && (serial->num_ports == 4)) { 2400 mos7840_port->SpRegOffset = 0x8; 2401 mos7840_port->ControlRegOffset = 0x9; 2402 mos7840_port->DcrRegOffset = 0x16; 2403 } else if ((mos7840_port->port_num == 2) 2404 && (serial->num_ports == 2)) { 2405 mos7840_port->SpRegOffset = 0xa; 2406 mos7840_port->ControlRegOffset = 0xb; 2407 mos7840_port->DcrRegOffset = 0x19; 2408 } else if ((mos7840_port->port_num == 3) 2409 && (serial->num_ports == 4)) { 2410 mos7840_port->SpRegOffset = 0xa; 2411 mos7840_port->ControlRegOffset = 0xb; 2412 mos7840_port->DcrRegOffset = 0x19; 2413 } else if ((mos7840_port->port_num == 4) 2414 && (serial->num_ports == 4)) { 2415 mos7840_port->SpRegOffset = 0xc; 2416 mos7840_port->ControlRegOffset = 0xd; 2417 mos7840_port->DcrRegOffset = 0x1c; 2418 } 2419 mos7840_dump_serial_port(serial->port[i], mos7840_port); 2420 mos7840_set_port_private(serial->port[i], mos7840_port); 2421 2422 /* enable rx_disable bit in control register */ 2423 status = mos7840_get_reg_sync(serial->port[i], 2424 mos7840_port->ControlRegOffset, &Data); 2425 if (status < 0) { 2426 dev_dbg(&dev->dev, "Reading ControlReg failed status-0x%x\n", status); 2427 break; 2428 } else 2429 dev_dbg(&dev->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); 2430 Data |= 0x08; /* setting driver done bit */ 2431 Data |= 0x04; /* sp1_bit to have cts change reflect in 2432 modem status reg */ 2433 2434 /* Data |= 0x20; //rx_disable bit */ 2435 status = mos7840_set_reg_sync(serial->port[i], 2436 mos7840_port->ControlRegOffset, Data); 2437 if (status < 0) { 2438 dev_dbg(&dev->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2439 break; 2440 } else 2441 dev_dbg(&dev->dev, "ControlReg Writing success(rx_disable) status%d\n", status); 2442 2443 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2444 and 0x24 in DCR3 */ 2445 Data = 0x01; 2446 status = mos7840_set_reg_sync(serial->port[i], 2447 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2448 if (status < 0) { 2449 dev_dbg(&dev->dev, "Writing DCR0 failed status-0x%x\n", status); 2450 break; 2451 } else 2452 dev_dbg(&dev->dev, "DCR0 Writing success status%d\n", status); 2453 2454 Data = 0x05; 2455 status = mos7840_set_reg_sync(serial->port[i], 2456 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2457 if (status < 0) { 2458 dev_dbg(&dev->dev, "Writing DCR1 failed status-0x%x\n", status); 2459 break; 2460 } else 2461 dev_dbg(&dev->dev, "DCR1 Writing success status%d\n", status); 2462 2463 Data = 0x24; 2464 status = mos7840_set_reg_sync(serial->port[i], 2465 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2466 if (status < 0) { 2467 dev_dbg(&dev->dev, "Writing DCR2 failed status-0x%x\n", status); 2468 break; 2469 } else 2470 dev_dbg(&dev->dev, "DCR2 Writing success status%d\n", status); 2471 2472 /* write values in clkstart0x0 and clkmulti 0x20 */ 2473 Data = 0x0; 2474 status = mos7840_set_reg_sync(serial->port[i], 2475 CLK_START_VALUE_REGISTER, Data); 2476 if (status < 0) { 2477 dev_dbg(&dev->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2478 break; 2479 } else 2480 dev_dbg(&dev->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2481 2482 Data = 0x20; 2483 status = mos7840_set_reg_sync(serial->port[i], 2484 CLK_MULTI_REGISTER, Data); 2485 if (status < 0) { 2486 dev_dbg(&dev->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); 2487 goto error; 2488 } else 2489 dev_dbg(&dev->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); 2490 2491 /* write value 0x0 to scratchpad register */ 2492 Data = 0x00; 2493 status = mos7840_set_uart_reg(serial->port[i], 2494 SCRATCH_PAD_REGISTER, Data); 2495 if (status < 0) { 2496 dev_dbg(&dev->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); 2497 break; 2498 } else 2499 dev_dbg(&dev->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); 2500 2501 /* Zero Length flag register */ 2502 if ((mos7840_port->port_num != 1) 2503 && (serial->num_ports == 2)) { 2504 2505 Data = 0xff; 2506 status = mos7840_set_reg_sync(serial->port[i], 2507 (__u16) (ZLP_REG1 + 2508 ((__u16)mos7840_port->port_num)), Data); 2509 dev_dbg(&dev->dev, "ZLIP offset %x\n", 2510 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); 2511 if (status < 0) { 2512 dev_dbg(&dev->dev, "Writing ZLP_REG%d failed status-0x%x\n", i + 2, status); 2513 break; 2514 } else 2515 dev_dbg(&dev->dev, "ZLP_REG%d Writing success status%d\n", i + 2, status); 2516 } else { 2517 Data = 0xff; 2518 status = mos7840_set_reg_sync(serial->port[i], 2519 (__u16) (ZLP_REG1 + 2520 ((__u16)mos7840_port->port_num) - 0x1), Data); 2521 dev_dbg(&dev->dev, "ZLIP offset %x\n", 2522 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); 2523 if (status < 0) { 2524 dev_dbg(&dev->dev, "Writing ZLP_REG%d failed status-0x%x\n", i + 1, status); 2525 break; 2526 } else 2527 dev_dbg(&dev->dev, "ZLP_REG%d Writing success status%d\n", i + 1, status); 2528 2529 } 2530 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2531 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2532 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2533 GFP_KERNEL); 2534 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2535 !mos7840_port->dr) { 2536 status = -ENOMEM; 2537 goto error; 2538 } 2539 2540 mos7840_port->has_led = false; 2541 2542 /* Initialize LED timers */ 2543 if (device_type == MOSCHIP_DEVICE_ID_7810) { 2544 mos7840_port->has_led = true; 2545 2546 init_timer(&mos7840_port->led_timer1); 2547 mos7840_port->led_timer1.function = mos7840_led_off; 2548 mos7840_port->led_timer1.expires = 2549 jiffies + msecs_to_jiffies(LED_ON_MS); 2550 mos7840_port->led_timer1.data = 2551 (unsigned long)mos7840_port; 2552 2553 init_timer(&mos7840_port->led_timer2); 2554 mos7840_port->led_timer2.function = 2555 mos7840_led_flag_off; 2556 mos7840_port->led_timer2.expires = 2557 jiffies + msecs_to_jiffies(LED_OFF_MS); 2558 mos7840_port->led_timer2.data = 2559 (unsigned long)mos7840_port; 2560 2561 mos7840_port->led_flag = false; 2562 2563 /* Turn off LED */ 2564 mos7840_set_led_sync(serial->port[i], 2565 MODEM_CONTROL_REGISTER, 0x0300); 2566 } 2567 } 2568 2569 /* Zero Length flag enable */ 2570 Data = 0x0f; 2571 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2572 if (status < 0) { 2573 dev_dbg(&dev->dev, "Writing ZLP_REG5 failed status-0x%x\n", status); 2574 goto error; 2575 } else 2576 dev_dbg(&dev->dev, "ZLP_REG5 Writing success status%d\n", status); 2577 2578 /* setting configuration feature to one */ 2579 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2580 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, MOS_WDR_TIMEOUT); 2581 return 0; 2582 error: 2583 for (/* nothing */; i >= 0; i--) { 2584 mos7840_port = mos7840_get_port_private(serial->port[i]); 2585 2586 kfree(mos7840_port->dr); 2587 kfree(mos7840_port->ctrl_buf); 2588 usb_free_urb(mos7840_port->control_urb); 2589 kfree(mos7840_port); 2590 serial->port[i] = NULL; 2591 } 2592 return status; 2593 } 2594 2595 /**************************************************************************** 2596 * mos7840_disconnect 2597 * This function is called whenever the device is removed from the usb bus. 2598 ****************************************************************************/ 2599 2600 static void mos7840_disconnect(struct usb_serial *serial) 2601 { 2602 int i; 2603 unsigned long flags; 2604 struct moschip_port *mos7840_port; 2605 2606 /* check for the ports to be closed,close the ports and disconnect */ 2607 2608 /* free private structure allocated for serial port * 2609 * stop reads and writes on all ports */ 2610 2611 for (i = 0; i < serial->num_ports; ++i) { 2612 mos7840_port = mos7840_get_port_private(serial->port[i]); 2613 if (mos7840_port) { 2614 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 2615 mos7840_port->zombie = 1; 2616 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 2617 usb_kill_urb(mos7840_port->control_urb); 2618 } 2619 } 2620 } 2621 2622 /**************************************************************************** 2623 * mos7840_release 2624 * This function is called when the usb_serial structure is freed. 2625 ****************************************************************************/ 2626 2627 static void mos7840_release(struct usb_serial *serial) 2628 { 2629 int i; 2630 struct moschip_port *mos7840_port; 2631 2632 /* check for the ports to be closed,close the ports and disconnect */ 2633 2634 /* free private structure allocated for serial port * 2635 * stop reads and writes on all ports */ 2636 2637 for (i = 0; i < serial->num_ports; ++i) { 2638 mos7840_port = mos7840_get_port_private(serial->port[i]); 2639 if (mos7840_port) { 2640 if (mos7840_port->has_led) { 2641 /* Turn off LED */ 2642 mos7840_set_led_sync(mos7840_port->port, 2643 MODEM_CONTROL_REGISTER, 0x0300); 2644 2645 del_timer_sync(&mos7840_port->led_timer1); 2646 del_timer_sync(&mos7840_port->led_timer2); 2647 } 2648 kfree(mos7840_port->ctrl_buf); 2649 kfree(mos7840_port->dr); 2650 kfree(mos7840_port); 2651 } 2652 } 2653 } 2654 2655 static struct usb_serial_driver moschip7840_4port_device = { 2656 .driver = { 2657 .owner = THIS_MODULE, 2658 .name = "mos7840", 2659 }, 2660 .description = DRIVER_DESC, 2661 .id_table = id_table, 2662 .num_ports = 4, 2663 .open = mos7840_open, 2664 .close = mos7840_close, 2665 .write = mos7840_write, 2666 .write_room = mos7840_write_room, 2667 .chars_in_buffer = mos7840_chars_in_buffer, 2668 .throttle = mos7840_throttle, 2669 .unthrottle = mos7840_unthrottle, 2670 .calc_num_ports = mos7840_calc_num_ports, 2671 #ifdef MCSSerialProbe 2672 .probe = mos7840_serial_probe, 2673 #endif 2674 .ioctl = mos7840_ioctl, 2675 .set_termios = mos7840_set_termios, 2676 .break_ctl = mos7840_break, 2677 .tiocmget = mos7840_tiocmget, 2678 .tiocmset = mos7840_tiocmset, 2679 .get_icount = mos7840_get_icount, 2680 .attach = mos7840_startup, 2681 .disconnect = mos7840_disconnect, 2682 .release = mos7840_release, 2683 .read_bulk_callback = mos7840_bulk_in_callback, 2684 .read_int_callback = mos7840_interrupt_callback, 2685 }; 2686 2687 static struct usb_serial_driver * const serial_drivers[] = { 2688 &moschip7840_4port_device, NULL 2689 }; 2690 2691 module_usb_serial_driver(serial_drivers, id_table); 2692 2693 MODULE_DESCRIPTION(DRIVER_DESC); 2694 MODULE_LICENSE("GPL"); 2695