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 __u8 shadowLCR; /* last LCR value received */ 222 __u8 shadowMCR; /* last MCR value received */ 223 char open; 224 char open_ports; 225 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 226 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 227 int delta_msr_cond; 228 struct async_icount icount; 229 struct usb_serial_port *port; /* loop back to the owner of this object */ 230 231 /* Offsets */ 232 __u8 SpRegOffset; 233 __u8 ControlRegOffset; 234 __u8 DcrRegOffset; 235 /* for processing control URBS in interrupt context */ 236 struct urb *control_urb; 237 struct usb_ctrlrequest *dr; 238 char *ctrl_buf; 239 int MsrLsr; 240 241 spinlock_t pool_lock; 242 struct urb *write_urb_pool[NUM_URBS]; 243 char busy[NUM_URBS]; 244 bool read_urb_busy; 245 246 /* For device(s) with LED indicator */ 247 bool has_led; 248 bool led_flag; 249 struct timer_list led_timer1; /* Timer for LED on */ 250 struct timer_list led_timer2; /* Timer for LED off */ 251 }; 252 253 /* 254 * mos7840_set_reg_sync 255 * To set the Control register by calling usb_fill_control_urb function 256 * by passing usb_sndctrlpipe function as parameter. 257 */ 258 259 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 260 __u16 val) 261 { 262 struct usb_device *dev = port->serial->dev; 263 val = val & 0x00ff; 264 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val); 265 266 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 267 MCS_WR_RTYPE, val, reg, NULL, 0, 268 MOS_WDR_TIMEOUT); 269 } 270 271 /* 272 * mos7840_get_reg_sync 273 * To set the Uart register by calling usb_fill_control_urb function by 274 * passing usb_rcvctrlpipe function as parameter. 275 */ 276 277 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 278 __u16 *val) 279 { 280 struct usb_device *dev = port->serial->dev; 281 int ret = 0; 282 u8 *buf; 283 284 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 285 if (!buf) 286 return -ENOMEM; 287 288 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 289 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, 290 MOS_WDR_TIMEOUT); 291 *val = buf[0]; 292 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val); 293 294 kfree(buf); 295 return ret; 296 } 297 298 /* 299 * mos7840_set_uart_reg 300 * To set the Uart register by calling usb_fill_control_urb function by 301 * passing usb_sndctrlpipe function as parameter. 302 */ 303 304 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 305 __u16 val) 306 { 307 308 struct usb_device *dev = port->serial->dev; 309 val = val & 0x00ff; 310 /* For the UART control registers, the application number need 311 to be Or'ed */ 312 if (port->serial->num_ports == 4) { 313 val |= (((__u16) port->number - 314 (__u16) (port->serial->minor)) + 1) << 8; 315 } else { 316 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 317 val |= (((__u16) port->number - 318 (__u16) (port->serial->minor)) + 1) << 8; 319 } else { 320 val |= (((__u16) port->number - 321 (__u16) (port->serial->minor)) + 2) << 8; 322 } 323 } 324 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val); 325 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 326 MCS_WR_RTYPE, val, reg, NULL, 0, 327 MOS_WDR_TIMEOUT); 328 329 } 330 331 /* 332 * mos7840_get_uart_reg 333 * To set the Control register by calling usb_fill_control_urb function 334 * by passing usb_rcvctrlpipe function as parameter. 335 */ 336 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 337 __u16 *val) 338 { 339 struct usb_device *dev = port->serial->dev; 340 int ret = 0; 341 __u16 Wval; 342 u8 *buf; 343 344 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 345 if (!buf) 346 return -ENOMEM; 347 348 /* Wval is same as application number */ 349 if (port->serial->num_ports == 4) { 350 Wval = 351 (((__u16) port->number - (__u16) (port->serial->minor)) + 352 1) << 8; 353 } else { 354 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 355 Wval = (((__u16) port->number - 356 (__u16) (port->serial->minor)) + 1) << 8; 357 } else { 358 Wval = (((__u16) port->number - 359 (__u16) (port->serial->minor)) + 2) << 8; 360 } 361 } 362 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval); 363 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 364 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, 365 MOS_WDR_TIMEOUT); 366 *val = buf[0]; 367 368 kfree(buf); 369 return ret; 370 } 371 372 static void mos7840_dump_serial_port(struct usb_serial_port *port, 373 struct moschip_port *mos7840_port) 374 { 375 376 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 377 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset); 378 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset); 379 380 } 381 382 /************************************************************************/ 383 /************************************************************************/ 384 /* I N T E R F A C E F U N C T I O N S */ 385 /* I N T E R F A C E F U N C T I O N S */ 386 /************************************************************************/ 387 /************************************************************************/ 388 389 static inline void mos7840_set_port_private(struct usb_serial_port *port, 390 struct moschip_port *data) 391 { 392 usb_set_serial_port_data(port, (void *)data); 393 } 394 395 static inline struct moschip_port *mos7840_get_port_private(struct 396 usb_serial_port 397 *port) 398 { 399 return (struct moschip_port *)usb_get_serial_port_data(port); 400 } 401 402 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 403 { 404 struct moschip_port *mos7840_port; 405 struct async_icount *icount; 406 mos7840_port = port; 407 icount = &mos7840_port->icount; 408 if (new_msr & 409 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 410 MOS_MSR_DELTA_CD)) { 411 icount = &mos7840_port->icount; 412 413 /* update input line counters */ 414 if (new_msr & MOS_MSR_DELTA_CTS) { 415 icount->cts++; 416 smp_wmb(); 417 } 418 if (new_msr & MOS_MSR_DELTA_DSR) { 419 icount->dsr++; 420 smp_wmb(); 421 } 422 if (new_msr & MOS_MSR_DELTA_CD) { 423 icount->dcd++; 424 smp_wmb(); 425 } 426 if (new_msr & MOS_MSR_DELTA_RI) { 427 icount->rng++; 428 smp_wmb(); 429 } 430 } 431 } 432 433 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 434 { 435 struct async_icount *icount; 436 437 if (new_lsr & SERIAL_LSR_BI) { 438 /* 439 * Parity and Framing errors only count if they 440 * occur exclusive of a break being 441 * received. 442 */ 443 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 444 } 445 446 /* update input line counters */ 447 icount = &port->icount; 448 if (new_lsr & SERIAL_LSR_BI) { 449 icount->brk++; 450 smp_wmb(); 451 } 452 if (new_lsr & SERIAL_LSR_OE) { 453 icount->overrun++; 454 smp_wmb(); 455 } 456 if (new_lsr & SERIAL_LSR_PE) { 457 icount->parity++; 458 smp_wmb(); 459 } 460 if (new_lsr & SERIAL_LSR_FE) { 461 icount->frame++; 462 smp_wmb(); 463 } 464 } 465 466 /************************************************************************/ 467 /************************************************************************/ 468 /* U S B C A L L B A C K F U N C T I O N S */ 469 /* U S B C A L L B A C K F U N C T I O N S */ 470 /************************************************************************/ 471 /************************************************************************/ 472 473 static void mos7840_control_callback(struct urb *urb) 474 { 475 unsigned char *data; 476 struct moschip_port *mos7840_port; 477 struct device *dev = &urb->dev->dev; 478 __u8 regval = 0x0; 479 int status = urb->status; 480 481 mos7840_port = urb->context; 482 483 switch (status) { 484 case 0: 485 /* success */ 486 break; 487 case -ECONNRESET: 488 case -ENOENT: 489 case -ESHUTDOWN: 490 /* this urb is terminated, clean up */ 491 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); 492 return; 493 default: 494 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); 495 return; 496 } 497 498 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length); 499 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__, 500 mos7840_port->MsrLsr, mos7840_port->port_num); 501 data = urb->transfer_buffer; 502 regval = (__u8) data[0]; 503 dev_dbg(dev, "%s data is %x\n", __func__, regval); 504 if (mos7840_port->MsrLsr == 0) 505 mos7840_handle_new_msr(mos7840_port, regval); 506 else if (mos7840_port->MsrLsr == 1) 507 mos7840_handle_new_lsr(mos7840_port, regval); 508 } 509 510 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 511 __u16 *val) 512 { 513 struct usb_device *dev = mcs->port->serial->dev; 514 struct usb_ctrlrequest *dr = mcs->dr; 515 unsigned char *buffer = mcs->ctrl_buf; 516 int ret; 517 518 dr->bRequestType = MCS_RD_RTYPE; 519 dr->bRequest = MCS_RDREQ; 520 dr->wValue = cpu_to_le16(Wval); /* 0 */ 521 dr->wIndex = cpu_to_le16(reg); 522 dr->wLength = cpu_to_le16(2); 523 524 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 525 (unsigned char *)dr, buffer, 2, 526 mos7840_control_callback, mcs); 527 mcs->control_urb->transfer_buffer_length = 2; 528 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 529 return ret; 530 } 531 532 static void mos7840_set_led_callback(struct urb *urb) 533 { 534 switch (urb->status) { 535 case 0: 536 /* Success */ 537 break; 538 case -ECONNRESET: 539 case -ENOENT: 540 case -ESHUTDOWN: 541 /* This urb is terminated, clean up */ 542 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d", 543 __func__, urb->status); 544 break; 545 default: 546 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d", 547 __func__, urb->status); 548 } 549 } 550 551 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, 552 __u16 reg) 553 { 554 struct usb_device *dev = mcs->port->serial->dev; 555 struct usb_ctrlrequest *dr = mcs->dr; 556 557 dr->bRequestType = MCS_WR_RTYPE; 558 dr->bRequest = MCS_WRREQ; 559 dr->wValue = cpu_to_le16(wval); 560 dr->wIndex = cpu_to_le16(reg); 561 dr->wLength = cpu_to_le16(0); 562 563 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0), 564 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL); 565 566 usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 567 } 568 569 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, 570 __u16 val) 571 { 572 struct usb_device *dev = port->serial->dev; 573 574 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, 575 val, reg, NULL, 0, MOS_WDR_TIMEOUT); 576 } 577 578 static void mos7840_led_off(unsigned long arg) 579 { 580 struct moschip_port *mcs = (struct moschip_port *) arg; 581 582 /* Turn off LED */ 583 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER); 584 mod_timer(&mcs->led_timer2, 585 jiffies + msecs_to_jiffies(LED_OFF_MS)); 586 } 587 588 static void mos7840_led_flag_off(unsigned long arg) 589 { 590 struct moschip_port *mcs = (struct moschip_port *) arg; 591 592 mcs->led_flag = false; 593 } 594 595 /***************************************************************************** 596 * mos7840_interrupt_callback 597 * this is the callback function for when we have received data on the 598 * interrupt endpoint. 599 *****************************************************************************/ 600 601 static void mos7840_interrupt_callback(struct urb *urb) 602 { 603 int result; 604 int length; 605 struct moschip_port *mos7840_port; 606 struct usb_serial *serial; 607 __u16 Data; 608 unsigned char *data; 609 __u8 sp[5], st; 610 int i, rv = 0; 611 __u16 wval, wreg = 0; 612 int status = urb->status; 613 614 switch (status) { 615 case 0: 616 /* success */ 617 break; 618 case -ECONNRESET: 619 case -ENOENT: 620 case -ESHUTDOWN: 621 /* this urb is terminated, clean up */ 622 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 623 __func__, status); 624 return; 625 default: 626 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", 627 __func__, status); 628 goto exit; 629 } 630 631 length = urb->actual_length; 632 data = urb->transfer_buffer; 633 634 serial = urb->context; 635 636 /* Moschip get 5 bytes 637 * Byte 1 IIR Port 1 (port.number is 0) 638 * Byte 2 IIR Port 2 (port.number is 1) 639 * Byte 3 IIR Port 3 (port.number is 2) 640 * Byte 4 IIR Port 4 (port.number is 3) 641 * Byte 5 FIFO status for both */ 642 643 if (length && length > 5) { 644 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n"); 645 return; 646 } 647 648 sp[0] = (__u8) data[0]; 649 sp[1] = (__u8) data[1]; 650 sp[2] = (__u8) data[2]; 651 sp[3] = (__u8) data[3]; 652 st = (__u8) data[4]; 653 654 for (i = 0; i < serial->num_ports; i++) { 655 mos7840_port = mos7840_get_port_private(serial->port[i]); 656 wval = 657 (((__u16) serial->port[i]->number - 658 (__u16) (serial->minor)) + 1) << 8; 659 if (mos7840_port->open) { 660 if (sp[i] & 0x01) { 661 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i); 662 } else { 663 switch (sp[i] & 0x0f) { 664 case SERIAL_IIR_RLS: 665 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i); 666 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n"); 667 mos7840_port->MsrLsr = 1; 668 wreg = LINE_STATUS_REGISTER; 669 break; 670 case SERIAL_IIR_MS: 671 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i); 672 mos7840_port->MsrLsr = 0; 673 wreg = MODEM_STATUS_REGISTER; 674 break; 675 } 676 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 677 } 678 } 679 } 680 if (!(rv < 0)) 681 /* the completion handler for the control urb will resubmit */ 682 return; 683 exit: 684 result = usb_submit_urb(urb, GFP_ATOMIC); 685 if (result) { 686 dev_err(&urb->dev->dev, 687 "%s - Error %d submitting interrupt urb\n", 688 __func__, result); 689 } 690 } 691 692 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 693 const char *function) 694 { 695 if (!port) { 696 pr_debug("%s - port == NULL\n", function); 697 return -1; 698 } 699 if (!port->serial) { 700 pr_debug("%s - port->serial == NULL\n", function); 701 return -1; 702 } 703 704 return 0; 705 } 706 707 /* Inline functions to check the sanity of a pointer that is passed to us */ 708 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 709 const char *function) 710 { 711 if (!serial) { 712 pr_debug("%s - serial == NULL\n", function); 713 return -1; 714 } 715 if (!serial->type) { 716 pr_debug("%s - serial->type == NULL!\n", function); 717 return -1; 718 } 719 720 return 0; 721 } 722 723 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 724 const char *function) 725 { 726 /* if no port was specified, or it fails a paranoia check */ 727 if (!port || 728 mos7840_port_paranoia_check(port, function) || 729 mos7840_serial_paranoia_check(port->serial, function)) { 730 /* then say that we don't have a valid usb_serial thing, 731 * which will end up genrating -ENODEV return values */ 732 return NULL; 733 } 734 735 return port->serial; 736 } 737 738 /***************************************************************************** 739 * mos7840_bulk_in_callback 740 * this is the callback function for when we have received data on the 741 * bulk in endpoint. 742 *****************************************************************************/ 743 744 static void mos7840_bulk_in_callback(struct urb *urb) 745 { 746 int retval; 747 unsigned char *data; 748 struct usb_serial *serial; 749 struct usb_serial_port *port; 750 struct moschip_port *mos7840_port; 751 struct tty_struct *tty; 752 int status = urb->status; 753 754 mos7840_port = urb->context; 755 if (!mos7840_port) 756 return; 757 758 if (status) { 759 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); 760 mos7840_port->read_urb_busy = false; 761 return; 762 } 763 764 port = mos7840_port->port; 765 if (mos7840_port_paranoia_check(port, __func__)) { 766 mos7840_port->read_urb_busy = false; 767 return; 768 } 769 770 serial = mos7840_get_usb_serial(port, __func__); 771 if (!serial) { 772 mos7840_port->read_urb_busy = false; 773 return; 774 } 775 776 data = urb->transfer_buffer; 777 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); 778 779 if (urb->actual_length) { 780 tty = tty_port_tty_get(&mos7840_port->port->port); 781 if (tty) { 782 tty_insert_flip_string(tty, data, urb->actual_length); 783 tty_flip_buffer_push(tty); 784 tty_kref_put(tty); 785 } 786 mos7840_port->icount.rx += urb->actual_length; 787 smp_wmb(); 788 dev_dbg(&port->dev, "mos7840_port->icount.rx is %d:\n", mos7840_port->icount.rx); 789 } 790 791 if (!mos7840_port->read_urb) { 792 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n"); 793 mos7840_port->read_urb_busy = false; 794 return; 795 } 796 797 /* Turn on LED */ 798 if (mos7840_port->has_led && !mos7840_port->led_flag) { 799 mos7840_port->led_flag = true; 800 mos7840_set_led_async(mos7840_port, 0x0301, 801 MODEM_CONTROL_REGISTER); 802 mod_timer(&mos7840_port->led_timer1, 803 jiffies + msecs_to_jiffies(LED_ON_MS)); 804 } 805 806 mos7840_port->read_urb_busy = true; 807 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 808 809 if (retval) { 810 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); 811 mos7840_port->read_urb_busy = false; 812 } 813 } 814 815 /***************************************************************************** 816 * mos7840_bulk_out_data_callback 817 * this is the callback function for when we have finished sending 818 * serial data on the bulk out endpoint. 819 *****************************************************************************/ 820 821 static void mos7840_bulk_out_data_callback(struct urb *urb) 822 { 823 struct moschip_port *mos7840_port; 824 struct usb_serial_port *port; 825 struct tty_struct *tty; 826 int status = urb->status; 827 int i; 828 829 mos7840_port = urb->context; 830 port = mos7840_port->port; 831 spin_lock(&mos7840_port->pool_lock); 832 for (i = 0; i < NUM_URBS; i++) { 833 if (urb == mos7840_port->write_urb_pool[i]) { 834 mos7840_port->busy[i] = 0; 835 break; 836 } 837 } 838 spin_unlock(&mos7840_port->pool_lock); 839 840 if (status) { 841 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status); 842 return; 843 } 844 845 if (mos7840_port_paranoia_check(port, __func__)) 846 return; 847 848 tty = tty_port_tty_get(&port->port); 849 if (tty && mos7840_port->open) 850 tty_wakeup(tty); 851 tty_kref_put(tty); 852 853 } 854 855 /************************************************************************/ 856 /* 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 */ 857 /************************************************************************/ 858 #ifdef MCSSerialProbe 859 static int mos7840_serial_probe(struct usb_serial *serial, 860 const struct usb_device_id *id) 861 { 862 863 /*need to implement the mode_reg reading and updating\ 864 structures usb_serial_ device_type\ 865 (i.e num_ports, num_bulkin,bulkout etc) */ 866 /* Also we can update the changes attach */ 867 return 1; 868 } 869 #endif 870 871 /***************************************************************************** 872 * mos7840_open 873 * this function is called by the tty driver when a port is opened 874 * If successful, we return 0 875 * Otherwise we return a negative error number. 876 *****************************************************************************/ 877 878 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 879 { 880 int response; 881 int j; 882 struct usb_serial *serial; 883 struct urb *urb; 884 __u16 Data; 885 int status; 886 struct moschip_port *mos7840_port; 887 struct moschip_port *port0; 888 889 if (mos7840_port_paranoia_check(port, __func__)) 890 return -ENODEV; 891 892 serial = port->serial; 893 894 if (mos7840_serial_paranoia_check(serial, __func__)) 895 return -ENODEV; 896 897 mos7840_port = mos7840_get_port_private(port); 898 port0 = mos7840_get_port_private(serial->port[0]); 899 900 if (mos7840_port == NULL || port0 == NULL) 901 return -ENODEV; 902 903 usb_clear_halt(serial->dev, port->write_urb->pipe); 904 usb_clear_halt(serial->dev, port->read_urb->pipe); 905 port0->open_ports++; 906 907 /* Initialising the write urb pool */ 908 for (j = 0; j < NUM_URBS; ++j) { 909 urb = usb_alloc_urb(0, GFP_KERNEL); 910 mos7840_port->write_urb_pool[j] = urb; 911 912 if (urb == NULL) { 913 dev_err(&port->dev, "No more urbs???\n"); 914 continue; 915 } 916 917 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 918 GFP_KERNEL); 919 if (!urb->transfer_buffer) { 920 usb_free_urb(urb); 921 mos7840_port->write_urb_pool[j] = NULL; 922 dev_err(&port->dev, 923 "%s-out of memory for urb buffers.\n", 924 __func__); 925 continue; 926 } 927 } 928 929 /***************************************************************************** 930 * Initialize MCS7840 -- Write Init values to corresponding Registers 931 * 932 * Register Index 933 * 1 : IER 934 * 2 : FCR 935 * 3 : LCR 936 * 4 : MCR 937 * 938 * 0x08 : SP1/2 Control Reg 939 *****************************************************************************/ 940 941 /* NEED to check the following Block */ 942 943 Data = 0x0; 944 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 945 if (status < 0) { 946 dev_dbg(&port->dev, "Reading Spreg failed\n"); 947 return -1; 948 } 949 Data |= 0x80; 950 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 951 if (status < 0) { 952 dev_dbg(&port->dev, "writing Spreg failed\n"); 953 return -1; 954 } 955 956 Data &= ~0x80; 957 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 958 if (status < 0) { 959 dev_dbg(&port->dev, "writing Spreg failed\n"); 960 return -1; 961 } 962 /* End of block to be checked */ 963 964 Data = 0x0; 965 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 966 &Data); 967 if (status < 0) { 968 dev_dbg(&port->dev, "Reading Controlreg failed\n"); 969 return -1; 970 } 971 Data |= 0x08; /* Driver done bit */ 972 Data |= 0x20; /* rx_disable */ 973 status = mos7840_set_reg_sync(port, 974 mos7840_port->ControlRegOffset, Data); 975 if (status < 0) { 976 dev_dbg(&port->dev, "writing Controlreg failed\n"); 977 return -1; 978 } 979 /* do register settings here */ 980 /* Set all regs to the device default values. */ 981 /*********************************** 982 * First Disable all interrupts. 983 ***********************************/ 984 Data = 0x00; 985 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 986 if (status < 0) { 987 dev_dbg(&port->dev, "disabling interrupts failed\n"); 988 return -1; 989 } 990 /* Set FIFO_CONTROL_REGISTER to the default value */ 991 Data = 0x00; 992 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 993 if (status < 0) { 994 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 995 return -1; 996 } 997 998 Data = 0xcf; 999 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1000 if (status < 0) { 1001 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 1002 return -1; 1003 } 1004 1005 Data = 0x03; 1006 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1007 mos7840_port->shadowLCR = Data; 1008 1009 Data = 0x0b; 1010 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1011 mos7840_port->shadowMCR = Data; 1012 1013 Data = 0x00; 1014 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1015 mos7840_port->shadowLCR = Data; 1016 1017 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1018 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1019 1020 Data = 0x0c; 1021 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1022 1023 Data = 0x0; 1024 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1025 1026 Data = 0x00; 1027 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1028 1029 Data = Data & ~SERIAL_LCR_DLAB; 1030 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1031 mos7840_port->shadowLCR = Data; 1032 1033 /* clearing Bulkin and Bulkout Fifo */ 1034 Data = 0x0; 1035 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 1036 1037 Data = Data | 0x0c; 1038 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1039 1040 Data = Data & ~0x0c; 1041 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1042 /* Finally enable all interrupts */ 1043 Data = 0x0c; 1044 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1045 1046 /* clearing rx_disable */ 1047 Data = 0x0; 1048 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1049 &Data); 1050 Data = Data & ~0x20; 1051 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1052 Data); 1053 1054 /* rx_negate */ 1055 Data = 0x0; 1056 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1057 &Data); 1058 Data = Data | 0x10; 1059 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1060 Data); 1061 1062 /* Check to see if we've set up our endpoint info yet * 1063 * (can't set it up in mos7840_startup as the structures * 1064 * were not set up at that time.) */ 1065 if (port0->open_ports == 1) { 1066 if (serial->port[0]->interrupt_in_buffer == NULL) { 1067 /* set up interrupt urb */ 1068 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1069 serial->dev, 1070 usb_rcvintpipe(serial->dev, 1071 serial->port[0]->interrupt_in_endpointAddress), 1072 serial->port[0]->interrupt_in_buffer, 1073 serial->port[0]->interrupt_in_urb-> 1074 transfer_buffer_length, 1075 mos7840_interrupt_callback, 1076 serial, 1077 serial->port[0]->interrupt_in_urb->interval); 1078 1079 /* start interrupt read for mos7840 * 1080 * will continue as long as mos7840 is connected */ 1081 1082 response = 1083 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1084 GFP_KERNEL); 1085 if (response) { 1086 dev_err(&port->dev, "%s - Error %d submitting " 1087 "interrupt urb\n", __func__, response); 1088 } 1089 1090 } 1091 1092 } 1093 1094 /* see if we've set up our endpoint info yet * 1095 * (can't set it up in mos7840_startup as the * 1096 * structures were not set up at that time.) */ 1097 1098 dev_dbg(&port->dev, "port number is %d\n", port->number); 1099 dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor); 1100 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress); 1101 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress); 1102 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress); 1103 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num); 1104 mos7840_port->read_urb = port->read_urb; 1105 1106 /* set up our bulk in urb */ 1107 if ((serial->num_ports == 2) 1108 && ((((__u16)port->number - 1109 (__u16)(port->serial->minor)) % 2) != 0)) { 1110 usb_fill_bulk_urb(mos7840_port->read_urb, 1111 serial->dev, 1112 usb_rcvbulkpipe(serial->dev, 1113 (port->bulk_in_endpointAddress) + 2), 1114 port->bulk_in_buffer, 1115 mos7840_port->read_urb->transfer_buffer_length, 1116 mos7840_bulk_in_callback, mos7840_port); 1117 } else { 1118 usb_fill_bulk_urb(mos7840_port->read_urb, 1119 serial->dev, 1120 usb_rcvbulkpipe(serial->dev, 1121 port->bulk_in_endpointAddress), 1122 port->bulk_in_buffer, 1123 mos7840_port->read_urb->transfer_buffer_length, 1124 mos7840_bulk_in_callback, mos7840_port); 1125 } 1126 1127 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress); 1128 mos7840_port->read_urb_busy = true; 1129 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1130 if (response) { 1131 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1132 __func__, response); 1133 mos7840_port->read_urb_busy = false; 1134 } 1135 1136 /* initialize our wait queues */ 1137 init_waitqueue_head(&mos7840_port->wait_chase); 1138 init_waitqueue_head(&mos7840_port->delta_msr_wait); 1139 1140 /* initialize our icount structure */ 1141 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); 1142 1143 /* initialize our port settings */ 1144 /* Must set to enable ints! */ 1145 mos7840_port->shadowMCR = MCR_MASTER_IE; 1146 /* send a open port command */ 1147 mos7840_port->open = 1; 1148 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1149 mos7840_port->icount.tx = 0; 1150 mos7840_port->icount.rx = 0; 1151 1152 return 0; 1153 } 1154 1155 /***************************************************************************** 1156 * mos7840_chars_in_buffer 1157 * this function is called by the tty driver when it wants to know how many 1158 * bytes of data we currently have outstanding in the port (data that has 1159 * been written, but hasn't made it out the port yet) 1160 * If successful, we return the number of bytes left to be written in the 1161 * system, 1162 * Otherwise we return zero. 1163 *****************************************************************************/ 1164 1165 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1166 { 1167 struct usb_serial_port *port = tty->driver_data; 1168 int i; 1169 int chars = 0; 1170 unsigned long flags; 1171 struct moschip_port *mos7840_port; 1172 1173 if (mos7840_port_paranoia_check(port, __func__)) 1174 return 0; 1175 1176 mos7840_port = mos7840_get_port_private(port); 1177 if (mos7840_port == NULL) 1178 return 0; 1179 1180 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1181 for (i = 0; i < NUM_URBS; ++i) { 1182 if (mos7840_port->busy[i]) { 1183 struct urb *urb = mos7840_port->write_urb_pool[i]; 1184 chars += urb->transfer_buffer_length; 1185 } 1186 } 1187 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1188 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 1189 return chars; 1190 1191 } 1192 1193 /***************************************************************************** 1194 * mos7840_close 1195 * this function is called by the tty driver when a port is closed 1196 *****************************************************************************/ 1197 1198 static void mos7840_close(struct usb_serial_port *port) 1199 { 1200 struct usb_serial *serial; 1201 struct moschip_port *mos7840_port; 1202 struct moschip_port *port0; 1203 int j; 1204 __u16 Data; 1205 1206 if (mos7840_port_paranoia_check(port, __func__)) 1207 return; 1208 1209 serial = mos7840_get_usb_serial(port, __func__); 1210 if (!serial) 1211 return; 1212 1213 mos7840_port = mos7840_get_port_private(port); 1214 port0 = mos7840_get_port_private(serial->port[0]); 1215 1216 if (mos7840_port == NULL || port0 == NULL) 1217 return; 1218 1219 for (j = 0; j < NUM_URBS; ++j) 1220 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1221 1222 /* Freeing Write URBs */ 1223 for (j = 0; j < NUM_URBS; ++j) { 1224 if (mos7840_port->write_urb_pool[j]) { 1225 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1226 kfree(mos7840_port->write_urb_pool[j]-> 1227 transfer_buffer); 1228 1229 usb_free_urb(mos7840_port->write_urb_pool[j]); 1230 } 1231 } 1232 1233 /* While closing port, shutdown all bulk read, write * 1234 * and interrupt read if they exists */ 1235 if (serial->dev) { 1236 if (mos7840_port->write_urb) { 1237 dev_dbg(&port->dev, "%s", "Shutdown bulk write\n"); 1238 usb_kill_urb(mos7840_port->write_urb); 1239 } 1240 if (mos7840_port->read_urb) { 1241 dev_dbg(&port->dev, "%s", "Shutdown bulk read\n"); 1242 usb_kill_urb(mos7840_port->read_urb); 1243 mos7840_port->read_urb_busy = false; 1244 } 1245 if ((&mos7840_port->control_urb)) { 1246 dev_dbg(&port->dev, "%s", "Shutdown control read\n"); 1247 /*/ usb_kill_urb (mos7840_port->control_urb); */ 1248 } 1249 } 1250 /* if(mos7840_port->ctrl_buf != NULL) */ 1251 /* kfree(mos7840_port->ctrl_buf); */ 1252 port0->open_ports--; 1253 dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number); 1254 if (port0->open_ports == 0) { 1255 if (serial->port[0]->interrupt_in_urb) { 1256 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n"); 1257 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1258 } 1259 } 1260 1261 if (mos7840_port->write_urb) { 1262 /* if this urb had a transfer buffer already (old tx) free it */ 1263 if (mos7840_port->write_urb->transfer_buffer != NULL) 1264 kfree(mos7840_port->write_urb->transfer_buffer); 1265 usb_free_urb(mos7840_port->write_urb); 1266 } 1267 1268 Data = 0x0; 1269 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1270 1271 Data = 0x00; 1272 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1273 1274 mos7840_port->open = 0; 1275 } 1276 1277 /************************************************************************ 1278 * 1279 * mos7840_block_until_chase_response 1280 * 1281 * This function will block the close until one of the following: 1282 * 1. Response to our Chase comes from mos7840 1283 * 2. A timeout of 10 seconds without activity has expired 1284 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1285 * 1286 ************************************************************************/ 1287 1288 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1289 struct moschip_port *mos7840_port) 1290 { 1291 int timeout = msecs_to_jiffies(1000); 1292 int wait = 10; 1293 int count; 1294 1295 while (1) { 1296 count = mos7840_chars_in_buffer(tty); 1297 1298 /* Check for Buffer status */ 1299 if (count <= 0) 1300 return; 1301 1302 /* Block the thread for a while */ 1303 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1304 timeout); 1305 /* No activity.. count down section */ 1306 wait--; 1307 if (wait == 0) { 1308 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__); 1309 return; 1310 } else { 1311 /* Reset timeout value back to seconds */ 1312 wait = 10; 1313 } 1314 } 1315 1316 } 1317 1318 /***************************************************************************** 1319 * mos7840_break 1320 * this function sends a break to the port 1321 *****************************************************************************/ 1322 static void mos7840_break(struct tty_struct *tty, int break_state) 1323 { 1324 struct usb_serial_port *port = tty->driver_data; 1325 unsigned char data; 1326 struct usb_serial *serial; 1327 struct moschip_port *mos7840_port; 1328 1329 if (mos7840_port_paranoia_check(port, __func__)) 1330 return; 1331 1332 serial = mos7840_get_usb_serial(port, __func__); 1333 if (!serial) 1334 return; 1335 1336 mos7840_port = mos7840_get_port_private(port); 1337 1338 if (mos7840_port == NULL) 1339 return; 1340 1341 if (serial->dev) 1342 /* flush and block until tx is empty */ 1343 mos7840_block_until_chase_response(tty, mos7840_port); 1344 1345 if (break_state == -1) 1346 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1347 else 1348 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1349 1350 /* FIXME: no locking on shadowLCR anywhere in driver */ 1351 mos7840_port->shadowLCR = data; 1352 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1353 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1354 mos7840_port->shadowLCR); 1355 } 1356 1357 /***************************************************************************** 1358 * mos7840_write_room 1359 * this function is called by the tty driver when it wants to know how many 1360 * bytes of data we can accept for a specific port. 1361 * If successful, we return the amount of room that we have for this port 1362 * Otherwise we return a negative error number. 1363 *****************************************************************************/ 1364 1365 static int mos7840_write_room(struct tty_struct *tty) 1366 { 1367 struct usb_serial_port *port = tty->driver_data; 1368 int i; 1369 int room = 0; 1370 unsigned long flags; 1371 struct moschip_port *mos7840_port; 1372 1373 if (mos7840_port_paranoia_check(port, __func__)) 1374 return -1; 1375 1376 mos7840_port = mos7840_get_port_private(port); 1377 if (mos7840_port == NULL) 1378 return -1; 1379 1380 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1381 for (i = 0; i < NUM_URBS; ++i) { 1382 if (!mos7840_port->busy[i]) 1383 room += URB_TRANSFER_BUFFER_SIZE; 1384 } 1385 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1386 1387 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1388 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); 1389 return room; 1390 1391 } 1392 1393 /***************************************************************************** 1394 * mos7840_write 1395 * this function is called by the tty driver when data should be written to 1396 * the port. 1397 * If successful, we return the number of bytes written, otherwise we 1398 * return a negative error number. 1399 *****************************************************************************/ 1400 1401 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1402 const unsigned char *data, int count) 1403 { 1404 int status; 1405 int i; 1406 int bytes_sent = 0; 1407 int transfer_size; 1408 unsigned long flags; 1409 1410 struct moschip_port *mos7840_port; 1411 struct usb_serial *serial; 1412 struct urb *urb; 1413 /* __u16 Data; */ 1414 const unsigned char *current_position = data; 1415 unsigned char *data1; 1416 1417 #ifdef NOTMOS7840 1418 Data = 0x00; 1419 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1420 mos7840_port->shadowLCR = Data; 1421 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data); 1422 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1423 1424 /* Data = 0x03; */ 1425 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1426 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1427 1428 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1429 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1430 1431 /* Data = 0x0c; */ 1432 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1433 Data = 0x00; 1434 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1435 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data); 1436 1437 Data = 0x0; 1438 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1439 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data); 1440 1441 Data = Data & ~SERIAL_LCR_DLAB; 1442 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1443 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1444 #endif 1445 1446 if (mos7840_port_paranoia_check(port, __func__)) 1447 return -1; 1448 1449 serial = port->serial; 1450 if (mos7840_serial_paranoia_check(serial, __func__)) 1451 return -1; 1452 1453 mos7840_port = mos7840_get_port_private(port); 1454 if (mos7840_port == NULL) 1455 return -1; 1456 1457 /* try to find a free urb in the list */ 1458 urb = NULL; 1459 1460 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1461 for (i = 0; i < NUM_URBS; ++i) { 1462 if (!mos7840_port->busy[i]) { 1463 mos7840_port->busy[i] = 1; 1464 urb = mos7840_port->write_urb_pool[i]; 1465 dev_dbg(&port->dev, "URB:%d\n", i); 1466 break; 1467 } 1468 } 1469 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1470 1471 if (urb == NULL) { 1472 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); 1473 goto exit; 1474 } 1475 1476 if (urb->transfer_buffer == NULL) { 1477 urb->transfer_buffer = 1478 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1479 1480 if (urb->transfer_buffer == NULL) { 1481 dev_err_console(port, "%s no more kernel memory...\n", 1482 __func__); 1483 goto exit; 1484 } 1485 } 1486 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1487 1488 memcpy(urb->transfer_buffer, current_position, transfer_size); 1489 1490 /* fill urb with data and submit */ 1491 if ((serial->num_ports == 2) 1492 && ((((__u16)port->number - 1493 (__u16)(port->serial->minor)) % 2) != 0)) { 1494 usb_fill_bulk_urb(urb, 1495 serial->dev, 1496 usb_sndbulkpipe(serial->dev, 1497 (port->bulk_out_endpointAddress) + 2), 1498 urb->transfer_buffer, 1499 transfer_size, 1500 mos7840_bulk_out_data_callback, mos7840_port); 1501 } else { 1502 usb_fill_bulk_urb(urb, 1503 serial->dev, 1504 usb_sndbulkpipe(serial->dev, 1505 port->bulk_out_endpointAddress), 1506 urb->transfer_buffer, 1507 transfer_size, 1508 mos7840_bulk_out_data_callback, mos7840_port); 1509 } 1510 1511 data1 = urb->transfer_buffer; 1512 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); 1513 1514 /* Turn on LED */ 1515 if (mos7840_port->has_led && !mos7840_port->led_flag) { 1516 mos7840_port->led_flag = true; 1517 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301); 1518 mod_timer(&mos7840_port->led_timer1, 1519 jiffies + msecs_to_jiffies(LED_ON_MS)); 1520 } 1521 1522 /* send it down the pipe */ 1523 status = usb_submit_urb(urb, GFP_ATOMIC); 1524 1525 if (status) { 1526 mos7840_port->busy[i] = 0; 1527 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 1528 "with status = %d\n", __func__, status); 1529 bytes_sent = status; 1530 goto exit; 1531 } 1532 bytes_sent = transfer_size; 1533 mos7840_port->icount.tx += transfer_size; 1534 smp_wmb(); 1535 dev_dbg(&port->dev, "mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx); 1536 exit: 1537 return bytes_sent; 1538 1539 } 1540 1541 /***************************************************************************** 1542 * mos7840_throttle 1543 * this function is called by the tty driver when it wants to stop the data 1544 * being read from the port. 1545 *****************************************************************************/ 1546 1547 static void mos7840_throttle(struct tty_struct *tty) 1548 { 1549 struct usb_serial_port *port = tty->driver_data; 1550 struct moschip_port *mos7840_port; 1551 int status; 1552 1553 if (mos7840_port_paranoia_check(port, __func__)) 1554 return; 1555 1556 mos7840_port = mos7840_get_port_private(port); 1557 1558 if (mos7840_port == NULL) 1559 return; 1560 1561 if (!mos7840_port->open) { 1562 dev_dbg(&port->dev, "%s", "port not opened\n"); 1563 return; 1564 } 1565 1566 /* if we are implementing XON/XOFF, send the stop character */ 1567 if (I_IXOFF(tty)) { 1568 unsigned char stop_char = STOP_CHAR(tty); 1569 status = mos7840_write(tty, port, &stop_char, 1); 1570 if (status <= 0) 1571 return; 1572 } 1573 /* if we are implementing RTS/CTS, toggle that line */ 1574 if (tty->termios.c_cflag & CRTSCTS) { 1575 mos7840_port->shadowMCR &= ~MCR_RTS; 1576 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1577 mos7840_port->shadowMCR); 1578 if (status < 0) 1579 return; 1580 } 1581 } 1582 1583 /***************************************************************************** 1584 * mos7840_unthrottle 1585 * this function is called by the tty driver when it wants to resume 1586 * the data being read from the port (called after mos7840_throttle is 1587 * called) 1588 *****************************************************************************/ 1589 static void mos7840_unthrottle(struct tty_struct *tty) 1590 { 1591 struct usb_serial_port *port = tty->driver_data; 1592 int status; 1593 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1594 1595 if (mos7840_port_paranoia_check(port, __func__)) 1596 return; 1597 1598 if (mos7840_port == NULL) 1599 return; 1600 1601 if (!mos7840_port->open) { 1602 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1603 return; 1604 } 1605 1606 /* if we are implementing XON/XOFF, send the start character */ 1607 if (I_IXOFF(tty)) { 1608 unsigned char start_char = START_CHAR(tty); 1609 status = mos7840_write(tty, port, &start_char, 1); 1610 if (status <= 0) 1611 return; 1612 } 1613 1614 /* if we are implementing RTS/CTS, toggle that line */ 1615 if (tty->termios.c_cflag & CRTSCTS) { 1616 mos7840_port->shadowMCR |= MCR_RTS; 1617 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1618 mos7840_port->shadowMCR); 1619 if (status < 0) 1620 return; 1621 } 1622 } 1623 1624 static int mos7840_tiocmget(struct tty_struct *tty) 1625 { 1626 struct usb_serial_port *port = tty->driver_data; 1627 struct moschip_port *mos7840_port; 1628 unsigned int result; 1629 __u16 msr; 1630 __u16 mcr; 1631 int status; 1632 mos7840_port = mos7840_get_port_private(port); 1633 1634 if (mos7840_port == NULL) 1635 return -ENODEV; 1636 1637 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1638 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1639 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1640 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1641 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1642 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1643 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1644 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1645 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1646 1647 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 1648 1649 return result; 1650 } 1651 1652 static int mos7840_tiocmset(struct tty_struct *tty, 1653 unsigned int set, unsigned int clear) 1654 { 1655 struct usb_serial_port *port = tty->driver_data; 1656 struct moschip_port *mos7840_port; 1657 unsigned int mcr; 1658 int status; 1659 1660 mos7840_port = mos7840_get_port_private(port); 1661 1662 if (mos7840_port == NULL) 1663 return -ENODEV; 1664 1665 /* FIXME: What locks the port registers ? */ 1666 mcr = mos7840_port->shadowMCR; 1667 if (clear & TIOCM_RTS) 1668 mcr &= ~MCR_RTS; 1669 if (clear & TIOCM_DTR) 1670 mcr &= ~MCR_DTR; 1671 if (clear & TIOCM_LOOP) 1672 mcr &= ~MCR_LOOPBACK; 1673 1674 if (set & TIOCM_RTS) 1675 mcr |= MCR_RTS; 1676 if (set & TIOCM_DTR) 1677 mcr |= MCR_DTR; 1678 if (set & TIOCM_LOOP) 1679 mcr |= MCR_LOOPBACK; 1680 1681 mos7840_port->shadowMCR = mcr; 1682 1683 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1684 if (status < 0) { 1685 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); 1686 return status; 1687 } 1688 1689 return 0; 1690 } 1691 1692 /***************************************************************************** 1693 * mos7840_calc_baud_rate_divisor 1694 * this function calculates the proper baud rate divisor for the specified 1695 * baud rate. 1696 *****************************************************************************/ 1697 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, 1698 int baudRate, int *divisor, 1699 __u16 *clk_sel_val) 1700 { 1701 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); 1702 1703 if (baudRate <= 115200) { 1704 *divisor = 115200 / baudRate; 1705 *clk_sel_val = 0x0; 1706 } 1707 if ((baudRate > 115200) && (baudRate <= 230400)) { 1708 *divisor = 230400 / baudRate; 1709 *clk_sel_val = 0x10; 1710 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1711 *divisor = 403200 / baudRate; 1712 *clk_sel_val = 0x20; 1713 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1714 *divisor = 460800 / baudRate; 1715 *clk_sel_val = 0x30; 1716 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1717 *divisor = 806400 / baudRate; 1718 *clk_sel_val = 0x40; 1719 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1720 *divisor = 921600 / baudRate; 1721 *clk_sel_val = 0x50; 1722 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1723 *divisor = 1572864 / baudRate; 1724 *clk_sel_val = 0x60; 1725 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1726 *divisor = 3145728 / baudRate; 1727 *clk_sel_val = 0x70; 1728 } 1729 return 0; 1730 1731 #ifdef NOTMCS7840 1732 1733 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1734 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1735 *divisor = mos7840_divisor_table[i].Divisor; 1736 return 0; 1737 } 1738 } 1739 1740 /* After trying for all the standard baud rates * 1741 * Try calculating the divisor for this baud rate */ 1742 1743 if (baudrate > 75 && baudrate < 230400) { 1744 /* get the divisor */ 1745 custom = (__u16) (230400L / baudrate); 1746 1747 /* Check for round off */ 1748 round1 = (__u16) (2304000L / baudrate); 1749 round = (__u16) (round1 - (custom * 10)); 1750 if (round > 4) 1751 custom++; 1752 *divisor = custom; 1753 1754 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom); 1755 return 0; 1756 } 1757 1758 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n"); 1759 return -1; 1760 #endif 1761 } 1762 1763 /***************************************************************************** 1764 * mos7840_send_cmd_write_baud_rate 1765 * this function sends the proper command to change the baud rate of the 1766 * specified port. 1767 *****************************************************************************/ 1768 1769 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1770 int baudRate) 1771 { 1772 int divisor = 0; 1773 int status; 1774 __u16 Data; 1775 unsigned char number; 1776 __u16 clk_sel_val; 1777 struct usb_serial_port *port; 1778 1779 if (mos7840_port == NULL) 1780 return -1; 1781 1782 port = mos7840_port->port; 1783 if (mos7840_port_paranoia_check(port, __func__)) 1784 return -1; 1785 1786 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1787 return -1; 1788 1789 number = mos7840_port->port->number - mos7840_port->port->serial->minor; 1790 1791 dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__, 1792 mos7840_port->port->number, baudRate); 1793 /* reset clk_uart_sel in spregOffset */ 1794 if (baudRate > 115200) { 1795 #ifdef HW_flow_control 1796 /* NOTE: need to see the pther register to modify */ 1797 /* setting h/w flow control bit to 1 */ 1798 Data = 0x2b; 1799 mos7840_port->shadowMCR = Data; 1800 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1801 Data); 1802 if (status < 0) { 1803 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1804 return -1; 1805 } 1806 #endif 1807 1808 } else { 1809 #ifdef HW_flow_control 1810 /* setting h/w flow control bit to 0 */ 1811 Data = 0xb; 1812 mos7840_port->shadowMCR = Data; 1813 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1814 Data); 1815 if (status < 0) { 1816 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1817 return -1; 1818 } 1819 #endif 1820 1821 } 1822 1823 if (1) { /* baudRate <= 115200) */ 1824 clk_sel_val = 0x0; 1825 Data = 0x0; 1826 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, 1827 &clk_sel_val); 1828 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1829 &Data); 1830 if (status < 0) { 1831 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); 1832 return -1; 1833 } 1834 Data = (Data & 0x8f) | clk_sel_val; 1835 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1836 Data); 1837 if (status < 0) { 1838 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1839 return -1; 1840 } 1841 /* Calculate the Divisor */ 1842 1843 if (status) { 1844 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1845 return status; 1846 } 1847 /* Enable access to divisor latch */ 1848 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1849 mos7840_port->shadowLCR = Data; 1850 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1851 1852 /* Write the divisor */ 1853 Data = (unsigned char)(divisor & 0xff); 1854 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); 1855 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1856 1857 Data = (unsigned char)((divisor & 0xff00) >> 8); 1858 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); 1859 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1860 1861 /* Disable access to divisor latch */ 1862 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1863 mos7840_port->shadowLCR = Data; 1864 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1865 1866 } 1867 return status; 1868 } 1869 1870 /***************************************************************************** 1871 * mos7840_change_port_settings 1872 * This routine is called to set the UART on the device to match 1873 * the specified new settings. 1874 *****************************************************************************/ 1875 1876 static void mos7840_change_port_settings(struct tty_struct *tty, 1877 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1878 { 1879 int baud; 1880 unsigned cflag; 1881 unsigned iflag; 1882 __u8 lData; 1883 __u8 lParity; 1884 __u8 lStop; 1885 int status; 1886 __u16 Data; 1887 struct usb_serial_port *port; 1888 struct usb_serial *serial; 1889 1890 if (mos7840_port == NULL) 1891 return; 1892 1893 port = mos7840_port->port; 1894 1895 if (mos7840_port_paranoia_check(port, __func__)) 1896 return; 1897 1898 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1899 return; 1900 1901 serial = port->serial; 1902 1903 if (!mos7840_port->open) { 1904 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1905 return; 1906 } 1907 1908 lData = LCR_BITS_8; 1909 lStop = LCR_STOP_1; 1910 lParity = LCR_PAR_NONE; 1911 1912 cflag = tty->termios.c_cflag; 1913 iflag = tty->termios.c_iflag; 1914 1915 /* Change the number of bits */ 1916 if (cflag & CSIZE) { 1917 switch (cflag & CSIZE) { 1918 case CS5: 1919 lData = LCR_BITS_5; 1920 break; 1921 1922 case CS6: 1923 lData = LCR_BITS_6; 1924 break; 1925 1926 case CS7: 1927 lData = LCR_BITS_7; 1928 break; 1929 default: 1930 case CS8: 1931 lData = LCR_BITS_8; 1932 break; 1933 } 1934 } 1935 /* Change the Parity bit */ 1936 if (cflag & PARENB) { 1937 if (cflag & PARODD) { 1938 lParity = LCR_PAR_ODD; 1939 dev_dbg(&port->dev, "%s - parity = odd\n", __func__); 1940 } else { 1941 lParity = LCR_PAR_EVEN; 1942 dev_dbg(&port->dev, "%s - parity = even\n", __func__); 1943 } 1944 1945 } else { 1946 dev_dbg(&port->dev, "%s - parity = none\n", __func__); 1947 } 1948 1949 if (cflag & CMSPAR) 1950 lParity = lParity | 0x20; 1951 1952 /* Change the Stop bit */ 1953 if (cflag & CSTOPB) { 1954 lStop = LCR_STOP_2; 1955 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); 1956 } else { 1957 lStop = LCR_STOP_1; 1958 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); 1959 } 1960 1961 /* Update the LCR with the correct value */ 1962 mos7840_port->shadowLCR &= 1963 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1964 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1965 1966 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, 1967 mos7840_port->shadowLCR); 1968 /* Disable Interrupts */ 1969 Data = 0x00; 1970 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1971 1972 Data = 0x00; 1973 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1974 1975 Data = 0xcf; 1976 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1977 1978 /* Send the updated LCR value to the mos7840 */ 1979 Data = mos7840_port->shadowLCR; 1980 1981 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1982 1983 Data = 0x00b; 1984 mos7840_port->shadowMCR = Data; 1985 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1986 Data = 0x00b; 1987 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1988 1989 /* set up the MCR register and send it to the mos7840 */ 1990 1991 mos7840_port->shadowMCR = MCR_MASTER_IE; 1992 if (cflag & CBAUD) 1993 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1994 1995 if (cflag & CRTSCTS) 1996 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1997 else 1998 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 1999 2000 Data = mos7840_port->shadowMCR; 2001 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 2002 2003 /* Determine divisor based on baud rate */ 2004 baud = tty_get_baud_rate(tty); 2005 2006 if (!baud) { 2007 /* pick a default, any default... */ 2008 dev_dbg(&port->dev, "%s", "Picked default baud...\n"); 2009 baud = 9600; 2010 } 2011 2012 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); 2013 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 2014 2015 /* Enable Interrupts */ 2016 Data = 0x0c; 2017 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2018 2019 if (mos7840_port->read_urb_busy == false) { 2020 mos7840_port->read_urb_busy = true; 2021 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2022 if (status) { 2023 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 2024 status); 2025 mos7840_port->read_urb_busy = false; 2026 } 2027 } 2028 wake_up(&mos7840_port->delta_msr_wait); 2029 mos7840_port->delta_msr_cond = 1; 2030 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, 2031 mos7840_port->shadowLCR); 2032 } 2033 2034 /***************************************************************************** 2035 * mos7840_set_termios 2036 * this function is called by the tty driver when it wants to change 2037 * the termios structure 2038 *****************************************************************************/ 2039 2040 static void mos7840_set_termios(struct tty_struct *tty, 2041 struct usb_serial_port *port, 2042 struct ktermios *old_termios) 2043 { 2044 int status; 2045 unsigned int cflag; 2046 struct usb_serial *serial; 2047 struct moschip_port *mos7840_port; 2048 2049 if (mos7840_port_paranoia_check(port, __func__)) 2050 return; 2051 2052 serial = port->serial; 2053 2054 if (mos7840_serial_paranoia_check(serial, __func__)) 2055 return; 2056 2057 mos7840_port = mos7840_get_port_private(port); 2058 2059 if (mos7840_port == NULL) 2060 return; 2061 2062 if (!mos7840_port->open) { 2063 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 2064 return; 2065 } 2066 2067 dev_dbg(&port->dev, "%s", "setting termios - \n"); 2068 2069 cflag = tty->termios.c_cflag; 2070 2071 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, 2072 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); 2073 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, 2074 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2075 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number); 2076 2077 /* change the port settings to the new ones specified */ 2078 2079 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2080 2081 if (!mos7840_port->read_urb) { 2082 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n"); 2083 return; 2084 } 2085 2086 if (mos7840_port->read_urb_busy == false) { 2087 mos7840_port->read_urb_busy = true; 2088 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2089 if (status) { 2090 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 2091 status); 2092 mos7840_port->read_urb_busy = false; 2093 } 2094 } 2095 } 2096 2097 /***************************************************************************** 2098 * mos7840_get_lsr_info - get line status register info 2099 * 2100 * Purpose: Let user call ioctl() to get info when the UART physically 2101 * is emptied. On bus types like RS485, the transmitter must 2102 * release the bus after transmitting. This must be done when 2103 * the transmit shift register is empty, not be done when the 2104 * transmit holding register is empty. This functionality 2105 * allows an RS485 driver to be written in user space. 2106 *****************************************************************************/ 2107 2108 static int mos7840_get_lsr_info(struct tty_struct *tty, 2109 unsigned int __user *value) 2110 { 2111 int count; 2112 unsigned int result = 0; 2113 2114 count = mos7840_chars_in_buffer(tty); 2115 if (count == 0) 2116 result = TIOCSER_TEMT; 2117 2118 if (copy_to_user(value, &result, sizeof(int))) 2119 return -EFAULT; 2120 return 0; 2121 } 2122 2123 /***************************************************************************** 2124 * mos7840_get_serial_info 2125 * function to get information about serial port 2126 *****************************************************************************/ 2127 2128 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2129 struct serial_struct __user *retinfo) 2130 { 2131 struct serial_struct tmp; 2132 2133 if (mos7840_port == NULL) 2134 return -1; 2135 2136 if (!retinfo) 2137 return -EFAULT; 2138 2139 memset(&tmp, 0, sizeof(tmp)); 2140 2141 tmp.type = PORT_16550A; 2142 tmp.line = mos7840_port->port->serial->minor; 2143 tmp.port = mos7840_port->port->number; 2144 tmp.irq = 0; 2145 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2146 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2147 tmp.baud_base = 9600; 2148 tmp.close_delay = 5 * HZ; 2149 tmp.closing_wait = 30 * HZ; 2150 2151 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2152 return -EFAULT; 2153 return 0; 2154 } 2155 2156 static int mos7840_get_icount(struct tty_struct *tty, 2157 struct serial_icounter_struct *icount) 2158 { 2159 struct usb_serial_port *port = tty->driver_data; 2160 struct moschip_port *mos7840_port; 2161 struct async_icount cnow; 2162 2163 mos7840_port = mos7840_get_port_private(port); 2164 cnow = mos7840_port->icount; 2165 2166 smp_rmb(); 2167 icount->cts = cnow.cts; 2168 icount->dsr = cnow.dsr; 2169 icount->rng = cnow.rng; 2170 icount->dcd = cnow.dcd; 2171 icount->rx = cnow.rx; 2172 icount->tx = cnow.tx; 2173 icount->frame = cnow.frame; 2174 icount->overrun = cnow.overrun; 2175 icount->parity = cnow.parity; 2176 icount->brk = cnow.brk; 2177 icount->buf_overrun = cnow.buf_overrun; 2178 2179 dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", __func__, 2180 icount->rx, icount->tx); 2181 return 0; 2182 } 2183 2184 /***************************************************************************** 2185 * SerialIoctl 2186 * this function handles any ioctl calls to the driver 2187 *****************************************************************************/ 2188 2189 static int mos7840_ioctl(struct tty_struct *tty, 2190 unsigned int cmd, unsigned long arg) 2191 { 2192 struct usb_serial_port *port = tty->driver_data; 2193 void __user *argp = (void __user *)arg; 2194 struct moschip_port *mos7840_port; 2195 2196 struct async_icount cnow; 2197 struct async_icount cprev; 2198 2199 if (mos7840_port_paranoia_check(port, __func__)) 2200 return -1; 2201 2202 mos7840_port = mos7840_get_port_private(port); 2203 2204 if (mos7840_port == NULL) 2205 return -1; 2206 2207 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd); 2208 2209 switch (cmd) { 2210 /* return number of bytes available */ 2211 2212 case TIOCSERGETLSR: 2213 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 2214 return mos7840_get_lsr_info(tty, argp); 2215 2216 case TIOCGSERIAL: 2217 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); 2218 return mos7840_get_serial_info(mos7840_port, argp); 2219 2220 case TIOCSSERIAL: 2221 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__); 2222 break; 2223 2224 case TIOCMIWAIT: 2225 dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__); 2226 cprev = mos7840_port->icount; 2227 while (1) { 2228 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ 2229 mos7840_port->delta_msr_cond = 0; 2230 wait_event_interruptible(mos7840_port->delta_msr_wait, 2231 (mos7840_port-> 2232 delta_msr_cond == 1)); 2233 2234 /* see if a signal did it */ 2235 if (signal_pending(current)) 2236 return -ERESTARTSYS; 2237 cnow = mos7840_port->icount; 2238 smp_rmb(); 2239 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2240 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2241 return -EIO; /* no change => error */ 2242 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2243 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2244 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2245 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2246 return 0; 2247 } 2248 cprev = cnow; 2249 } 2250 /* NOTREACHED */ 2251 break; 2252 2253 default: 2254 break; 2255 } 2256 return -ENOIOCTLCMD; 2257 } 2258 2259 static int mos7810_check(struct usb_serial *serial) 2260 { 2261 int i, pass_count = 0; 2262 __u16 data = 0, mcr_data = 0; 2263 __u16 test_pattern = 0x55AA; 2264 2265 /* Store MCR setting */ 2266 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2267 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, 2268 &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2269 2270 for (i = 0; i < 16; i++) { 2271 /* Send the 1-bit test pattern out to MCS7810 test pin */ 2272 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2273 MCS_WRREQ, MCS_WR_RTYPE, 2274 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), 2275 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); 2276 2277 /* Read the test pattern back */ 2278 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2279 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data, 2280 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2281 2282 /* If this is a MCS7810 device, both test patterns must match */ 2283 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) 2284 break; 2285 2286 pass_count++; 2287 } 2288 2289 /* Restore MCR setting */ 2290 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, 2291 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 2292 0, MOS_WDR_TIMEOUT); 2293 2294 if (pass_count == 16) 2295 return 1; 2296 2297 return 0; 2298 } 2299 2300 static int mos7840_calc_num_ports(struct usb_serial *serial) 2301 { 2302 __u16 data = 0x00; 2303 int mos7840_num_ports; 2304 2305 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2306 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data, 2307 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2308 2309 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 || 2310 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) { 2311 device_type = serial->dev->descriptor.idProduct; 2312 } else { 2313 /* For a MCS7840 device GPIO0 must be set to 1 */ 2314 if ((data & 0x01) == 1) 2315 device_type = MOSCHIP_DEVICE_ID_7840; 2316 else if (mos7810_check(serial)) 2317 device_type = MOSCHIP_DEVICE_ID_7810; 2318 else 2319 device_type = MOSCHIP_DEVICE_ID_7820; 2320 } 2321 2322 mos7840_num_ports = (device_type >> 4) & 0x000F; 2323 serial->num_bulk_in = mos7840_num_ports; 2324 serial->num_bulk_out = mos7840_num_ports; 2325 serial->num_ports = mos7840_num_ports; 2326 2327 return mos7840_num_ports; 2328 } 2329 2330 static int mos7840_port_probe(struct usb_serial_port *port) 2331 { 2332 struct usb_serial *serial = port->serial; 2333 struct moschip_port *mos7840_port; 2334 int status; 2335 int pnum; 2336 __u16 Data; 2337 2338 /* we set up the pointers to the endpoints in the mos7840_open * 2339 * function, as the structures aren't created yet. */ 2340 2341 pnum = port->number - serial->minor; 2342 2343 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); 2344 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2345 if (mos7840_port == NULL) { 2346 dev_err(&port->dev, "%s - Out of memory\n", __func__); 2347 return -ENOMEM; 2348 } 2349 2350 /* Initialize all port interrupt end point to port 0 int 2351 * endpoint. Our device has only one interrupt end point 2352 * common to all port */ 2353 2354 mos7840_port->port = port; 2355 mos7840_set_port_private(port, mos7840_port); 2356 spin_lock_init(&mos7840_port->pool_lock); 2357 2358 /* minor is not initialised until later by 2359 * usb-serial.c:get_free_serial() and cannot therefore be used 2360 * to index device instances */ 2361 mos7840_port->port_num = pnum + 1; 2362 dev_dbg(&port->dev, "port->number = %d\n", port->number); 2363 dev_dbg(&port->dev, "port->serial->minor = %d\n", port->serial->minor); 2364 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); 2365 dev_dbg(&port->dev, "serial->minor = %d\n", serial->minor); 2366 2367 if (mos7840_port->port_num == 1) { 2368 mos7840_port->SpRegOffset = 0x0; 2369 mos7840_port->ControlRegOffset = 0x1; 2370 mos7840_port->DcrRegOffset = 0x4; 2371 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) { 2372 mos7840_port->SpRegOffset = 0x8; 2373 mos7840_port->ControlRegOffset = 0x9; 2374 mos7840_port->DcrRegOffset = 0x16; 2375 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) { 2376 mos7840_port->SpRegOffset = 0xa; 2377 mos7840_port->ControlRegOffset = 0xb; 2378 mos7840_port->DcrRegOffset = 0x19; 2379 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) { 2380 mos7840_port->SpRegOffset = 0xa; 2381 mos7840_port->ControlRegOffset = 0xb; 2382 mos7840_port->DcrRegOffset = 0x19; 2383 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) { 2384 mos7840_port->SpRegOffset = 0xc; 2385 mos7840_port->ControlRegOffset = 0xd; 2386 mos7840_port->DcrRegOffset = 0x1c; 2387 } 2388 mos7840_dump_serial_port(port, mos7840_port); 2389 mos7840_set_port_private(port, mos7840_port); 2390 2391 /* enable rx_disable bit in control register */ 2392 status = mos7840_get_reg_sync(port, 2393 mos7840_port->ControlRegOffset, &Data); 2394 if (status < 0) { 2395 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); 2396 goto out; 2397 } else 2398 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); 2399 Data |= 0x08; /* setting driver done bit */ 2400 Data |= 0x04; /* sp1_bit to have cts change reflect in 2401 modem status reg */ 2402 2403 /* Data |= 0x20; //rx_disable bit */ 2404 status = mos7840_set_reg_sync(port, 2405 mos7840_port->ControlRegOffset, Data); 2406 if (status < 0) { 2407 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2408 goto out; 2409 } else 2410 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); 2411 2412 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2413 and 0x24 in DCR3 */ 2414 Data = 0x01; 2415 status = mos7840_set_reg_sync(port, 2416 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2417 if (status < 0) { 2418 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); 2419 goto out; 2420 } else 2421 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); 2422 2423 Data = 0x05; 2424 status = mos7840_set_reg_sync(port, 2425 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2426 if (status < 0) { 2427 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); 2428 goto out; 2429 } else 2430 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); 2431 2432 Data = 0x24; 2433 status = mos7840_set_reg_sync(port, 2434 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2435 if (status < 0) { 2436 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); 2437 goto out; 2438 } else 2439 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); 2440 2441 /* write values in clkstart0x0 and clkmulti 0x20 */ 2442 Data = 0x0; 2443 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); 2444 if (status < 0) { 2445 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2446 goto out; 2447 } else 2448 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2449 2450 Data = 0x20; 2451 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); 2452 if (status < 0) { 2453 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); 2454 goto error; 2455 } else 2456 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); 2457 2458 /* write value 0x0 to scratchpad register */ 2459 Data = 0x00; 2460 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); 2461 if (status < 0) { 2462 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); 2463 goto out; 2464 } else 2465 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); 2466 2467 /* Zero Length flag register */ 2468 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { 2469 Data = 0xff; 2470 status = mos7840_set_reg_sync(port, 2471 (__u16) (ZLP_REG1 + 2472 ((__u16)mos7840_port->port_num)), Data); 2473 dev_dbg(&port->dev, "ZLIP offset %x\n", 2474 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); 2475 if (status < 0) { 2476 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); 2477 goto out; 2478 } else 2479 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); 2480 } else { 2481 Data = 0xff; 2482 status = mos7840_set_reg_sync(port, 2483 (__u16) (ZLP_REG1 + 2484 ((__u16)mos7840_port->port_num) - 0x1), Data); 2485 dev_dbg(&port->dev, "ZLIP offset %x\n", 2486 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); 2487 if (status < 0) { 2488 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); 2489 goto out; 2490 } else 2491 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); 2492 2493 } 2494 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2495 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2496 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2497 GFP_KERNEL); 2498 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2499 !mos7840_port->dr) { 2500 status = -ENOMEM; 2501 goto error; 2502 } 2503 2504 mos7840_port->has_led = false; 2505 2506 /* Initialize LED timers */ 2507 if (device_type == MOSCHIP_DEVICE_ID_7810) { 2508 mos7840_port->has_led = true; 2509 2510 init_timer(&mos7840_port->led_timer1); 2511 mos7840_port->led_timer1.function = mos7840_led_off; 2512 mos7840_port->led_timer1.expires = 2513 jiffies + msecs_to_jiffies(LED_ON_MS); 2514 mos7840_port->led_timer1.data = (unsigned long)mos7840_port; 2515 2516 init_timer(&mos7840_port->led_timer2); 2517 mos7840_port->led_timer2.function = mos7840_led_flag_off; 2518 mos7840_port->led_timer2.expires = 2519 jiffies + msecs_to_jiffies(LED_OFF_MS); 2520 mos7840_port->led_timer2.data = (unsigned long)mos7840_port; 2521 2522 mos7840_port->led_flag = false; 2523 2524 /* Turn off LED */ 2525 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2526 } 2527 out: 2528 if (pnum == serial->num_ports - 1) { 2529 /* Zero Length flag enable */ 2530 Data = 0x0f; 2531 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2532 if (status < 0) { 2533 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status); 2534 goto error; 2535 } else 2536 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status); 2537 2538 /* setting configuration feature to one */ 2539 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2540 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 2541 MOS_WDR_TIMEOUT); 2542 } 2543 return 0; 2544 error: 2545 kfree(mos7840_port->dr); 2546 kfree(mos7840_port->ctrl_buf); 2547 usb_free_urb(mos7840_port->control_urb); 2548 kfree(mos7840_port); 2549 2550 return status; 2551 } 2552 2553 static int mos7840_port_remove(struct usb_serial_port *port) 2554 { 2555 struct moschip_port *mos7840_port; 2556 2557 mos7840_port = mos7840_get_port_private(port); 2558 2559 if (mos7840_port->has_led) { 2560 /* Turn off LED */ 2561 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2562 2563 del_timer_sync(&mos7840_port->led_timer1); 2564 del_timer_sync(&mos7840_port->led_timer2); 2565 } 2566 usb_kill_urb(mos7840_port->control_urb); 2567 usb_free_urb(mos7840_port->control_urb); 2568 kfree(mos7840_port->ctrl_buf); 2569 kfree(mos7840_port->dr); 2570 kfree(mos7840_port); 2571 2572 return 0; 2573 } 2574 2575 static struct usb_serial_driver moschip7840_4port_device = { 2576 .driver = { 2577 .owner = THIS_MODULE, 2578 .name = "mos7840", 2579 }, 2580 .description = DRIVER_DESC, 2581 .id_table = id_table, 2582 .num_ports = 4, 2583 .open = mos7840_open, 2584 .close = mos7840_close, 2585 .write = mos7840_write, 2586 .write_room = mos7840_write_room, 2587 .chars_in_buffer = mos7840_chars_in_buffer, 2588 .throttle = mos7840_throttle, 2589 .unthrottle = mos7840_unthrottle, 2590 .calc_num_ports = mos7840_calc_num_ports, 2591 #ifdef MCSSerialProbe 2592 .probe = mos7840_serial_probe, 2593 #endif 2594 .ioctl = mos7840_ioctl, 2595 .set_termios = mos7840_set_termios, 2596 .break_ctl = mos7840_break, 2597 .tiocmget = mos7840_tiocmget, 2598 .tiocmset = mos7840_tiocmset, 2599 .get_icount = mos7840_get_icount, 2600 .port_probe = mos7840_port_probe, 2601 .port_remove = mos7840_port_remove, 2602 .read_bulk_callback = mos7840_bulk_in_callback, 2603 .read_int_callback = mos7840_interrupt_callback, 2604 }; 2605 2606 static struct usb_serial_driver * const serial_drivers[] = { 2607 &moschip7840_4port_device, NULL 2608 }; 2609 2610 module_usb_serial_driver(serial_drivers, id_table); 2611 2612 MODULE_DESCRIPTION(DRIVER_DESC); 2613 MODULE_LICENSE("GPL"); 2614