1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License as published by 4 * the Free Software Foundation; either version 2 of the License, or 5 * (at your option) any later version. 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 * 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 15 * 16 * Clean ups from Moschip version and a few ioctl implementations by: 17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com> 18 * 19 * Originally based on drivers/usb/serial/io_edgeport.c which is: 20 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 22 * 23 */ 24 25 #include <linux/kernel.h> 26 #include <linux/errno.h> 27 #include <linux/init.h> 28 #include <linux/slab.h> 29 #include <linux/tty.h> 30 #include <linux/tty_driver.h> 31 #include <linux/tty_flip.h> 32 #include <linux/module.h> 33 #include <linux/serial.h> 34 #include <linux/usb.h> 35 #include <linux/usb/serial.h> 36 #include <linux/uaccess.h> 37 38 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" 39 40 /* 41 * 16C50 UART register defines 42 */ 43 44 #define LCR_BITS_5 0x00 /* 5 bits/char */ 45 #define LCR_BITS_6 0x01 /* 6 bits/char */ 46 #define LCR_BITS_7 0x02 /* 7 bits/char */ 47 #define LCR_BITS_8 0x03 /* 8 bits/char */ 48 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ 49 50 #define LCR_STOP_1 0x00 /* 1 stop bit */ 51 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ 52 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ 53 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ 54 55 #define LCR_PAR_NONE 0x00 /* No parity */ 56 #define LCR_PAR_ODD 0x08 /* Odd parity */ 57 #define LCR_PAR_EVEN 0x18 /* Even parity */ 58 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ 59 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ 60 #define LCR_PAR_MASK 0x38 /* Mask for parity field */ 61 62 #define LCR_SET_BREAK 0x40 /* Set Break condition */ 63 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ 64 65 #define MCR_DTR 0x01 /* Assert DTR */ 66 #define MCR_RTS 0x02 /* Assert RTS */ 67 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ 68 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ 69 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ 70 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ 71 72 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ 73 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ 74 #define MOS7840_MSR_RI 0x40 /* Current state of RI */ 75 #define MOS7840_MSR_CD 0x80 /* Current state of CD */ 76 77 /* 78 * Defines used for sending commands to port 79 */ 80 81 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */ 82 83 #define MOS_PORT1 0x0200 84 #define MOS_PORT2 0x0300 85 #define MOS_VENREG 0x0000 86 #define MOS_MAX_PORT 0x02 87 #define MOS_WRITE 0x0E 88 #define MOS_READ 0x0D 89 90 /* Requests */ 91 #define MCS_RD_RTYPE 0xC0 92 #define MCS_WR_RTYPE 0x40 93 #define MCS_RDREQ 0x0D 94 #define MCS_WRREQ 0x0E 95 #define MCS_CTRL_TIMEOUT 500 96 #define VENDOR_READ_LENGTH (0x01) 97 98 #define MAX_NAME_LEN 64 99 100 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ 101 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ 102 103 /* For higher baud Rates use TIOCEXBAUD */ 104 #define TIOCEXBAUD 0x5462 105 106 /* vendor id and device id defines */ 107 108 /* The native mos7840/7820 component */ 109 #define USB_VENDOR_ID_MOSCHIP 0x9710 110 #define MOSCHIP_DEVICE_ID_7840 0x7840 111 #define MOSCHIP_DEVICE_ID_7820 0x7820 112 #define MOSCHIP_DEVICE_ID_7810 0x7810 113 /* The native component can have its vendor/device id's overridden 114 * in vendor-specific implementations. Such devices can be handled 115 * by making a change here, in id_table. 116 */ 117 #define USB_VENDOR_ID_BANDB 0x0856 118 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22 119 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00 120 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24 121 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01 122 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29 123 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30 124 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31 125 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32 126 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 127 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02 128 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 129 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03 130 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24 131 132 /* This driver also supports 133 * ATEN UC2324 device using Moschip MCS7840 134 * ATEN UC2322 device using Moschip MCS7820 135 */ 136 #define USB_VENDOR_ID_ATENINTL 0x0557 137 #define ATENINTL_DEVICE_ID_UC2324 0x2011 138 #define ATENINTL_DEVICE_ID_UC2322 0x7820 139 140 /* Interrupt Routine Defines */ 141 142 #define SERIAL_IIR_RLS 0x06 143 #define SERIAL_IIR_MS 0x00 144 145 /* 146 * Emulation of the bit mask on the LINE STATUS REGISTER. 147 */ 148 #define SERIAL_LSR_DR 0x0001 149 #define SERIAL_LSR_OE 0x0002 150 #define SERIAL_LSR_PE 0x0004 151 #define SERIAL_LSR_FE 0x0008 152 #define SERIAL_LSR_BI 0x0010 153 154 #define MOS_MSR_DELTA_CTS 0x10 155 #define MOS_MSR_DELTA_DSR 0x20 156 #define MOS_MSR_DELTA_RI 0x40 157 #define MOS_MSR_DELTA_CD 0x80 158 159 /* Serial Port register Address */ 160 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) 161 #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) 162 #define LINE_CONTROL_REGISTER ((__u16)(0x03)) 163 #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) 164 #define LINE_STATUS_REGISTER ((__u16)(0x05)) 165 #define MODEM_STATUS_REGISTER ((__u16)(0x06)) 166 #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) 167 #define DIVISOR_LATCH_LSB ((__u16)(0x00)) 168 #define DIVISOR_LATCH_MSB ((__u16)(0x01)) 169 170 #define CLK_MULTI_REGISTER ((__u16)(0x02)) 171 #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) 172 #define GPIO_REGISTER ((__u16)(0x07)) 173 174 #define SERIAL_LCR_DLAB ((__u16)(0x0080)) 175 176 /* 177 * URB POOL related defines 178 */ 179 #define NUM_URBS 16 /* URB Count */ 180 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 181 182 /* LED on/off milliseconds*/ 183 #define LED_ON_MS 500 184 #define LED_OFF_MS 500 185 186 static int device_type; 187 188 static const struct usb_device_id id_table[] = { 189 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 190 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 191 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)}, 192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, 193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, 194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, 195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, 196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, 197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, 198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, 199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, 200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, 202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, 204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, 205 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 206 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 207 {} /* terminating entry */ 208 }; 209 MODULE_DEVICE_TABLE(usb, id_table); 210 211 /* This structure holds all of the local port information */ 212 213 struct moschip_port { 214 int port_num; /*Actual port number in the device(1,2,etc) */ 215 struct urb *write_urb; /* write URB for this port */ 216 struct urb *read_urb; /* read URB for this port */ 217 __u8 shadowLCR; /* last LCR value received */ 218 __u8 shadowMCR; /* last MCR value received */ 219 char open; 220 char open_ports; 221 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */ 222 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */ 223 int delta_msr_cond; 224 struct async_icount icount; 225 struct usb_serial_port *port; /* loop back to the owner of this object */ 226 227 /* Offsets */ 228 __u8 SpRegOffset; 229 __u8 ControlRegOffset; 230 __u8 DcrRegOffset; 231 /* for processing control URBS in interrupt context */ 232 struct urb *control_urb; 233 struct usb_ctrlrequest *dr; 234 char *ctrl_buf; 235 int MsrLsr; 236 237 spinlock_t pool_lock; 238 struct urb *write_urb_pool[NUM_URBS]; 239 char busy[NUM_URBS]; 240 bool read_urb_busy; 241 242 /* For device(s) with LED indicator */ 243 bool has_led; 244 bool led_flag; 245 struct timer_list led_timer1; /* Timer for LED on */ 246 struct timer_list led_timer2; /* Timer for LED off */ 247 }; 248 249 /* 250 * mos7840_set_reg_sync 251 * To set the Control register by calling usb_fill_control_urb function 252 * by passing usb_sndctrlpipe function as parameter. 253 */ 254 255 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 256 __u16 val) 257 { 258 struct usb_device *dev = port->serial->dev; 259 val = val & 0x00ff; 260 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val); 261 262 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 263 MCS_WR_RTYPE, val, reg, NULL, 0, 264 MOS_WDR_TIMEOUT); 265 } 266 267 /* 268 * mos7840_get_reg_sync 269 * To set the Uart register by calling usb_fill_control_urb function by 270 * passing usb_rcvctrlpipe function as parameter. 271 */ 272 273 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 274 __u16 *val) 275 { 276 struct usb_device *dev = port->serial->dev; 277 int ret = 0; 278 u8 *buf; 279 280 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 281 if (!buf) 282 return -ENOMEM; 283 284 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 285 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, 286 MOS_WDR_TIMEOUT); 287 *val = buf[0]; 288 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val); 289 290 kfree(buf); 291 return ret; 292 } 293 294 /* 295 * mos7840_set_uart_reg 296 * To set the Uart register by calling usb_fill_control_urb function by 297 * passing usb_sndctrlpipe function as parameter. 298 */ 299 300 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 301 __u16 val) 302 { 303 304 struct usb_device *dev = port->serial->dev; 305 val = val & 0x00ff; 306 /* For the UART control registers, the application number need 307 to be Or'ed */ 308 if (port->serial->num_ports == 4) { 309 val |= (((__u16) port->number - 310 (__u16) (port->serial->minor)) + 1) << 8; 311 } else { 312 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 313 val |= (((__u16) port->number - 314 (__u16) (port->serial->minor)) + 1) << 8; 315 } else { 316 val |= (((__u16) port->number - 317 (__u16) (port->serial->minor)) + 2) << 8; 318 } 319 } 320 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val); 321 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 322 MCS_WR_RTYPE, val, reg, NULL, 0, 323 MOS_WDR_TIMEOUT); 324 325 } 326 327 /* 328 * mos7840_get_uart_reg 329 * To set the Control register by calling usb_fill_control_urb function 330 * by passing usb_rcvctrlpipe function as parameter. 331 */ 332 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 333 __u16 *val) 334 { 335 struct usb_device *dev = port->serial->dev; 336 int ret = 0; 337 __u16 Wval; 338 u8 *buf; 339 340 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 341 if (!buf) 342 return -ENOMEM; 343 344 /* Wval is same as application number */ 345 if (port->serial->num_ports == 4) { 346 Wval = 347 (((__u16) port->number - (__u16) (port->serial->minor)) + 348 1) << 8; 349 } else { 350 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) { 351 Wval = (((__u16) port->number - 352 (__u16) (port->serial->minor)) + 1) << 8; 353 } else { 354 Wval = (((__u16) port->number - 355 (__u16) (port->serial->minor)) + 2) << 8; 356 } 357 } 358 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval); 359 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 360 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, 361 MOS_WDR_TIMEOUT); 362 *val = buf[0]; 363 364 kfree(buf); 365 return ret; 366 } 367 368 static void mos7840_dump_serial_port(struct usb_serial_port *port, 369 struct moschip_port *mos7840_port) 370 { 371 372 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 373 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset); 374 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset); 375 376 } 377 378 /************************************************************************/ 379 /************************************************************************/ 380 /* I N T E R F A C E F U N C T I O N S */ 381 /* I N T E R F A C E F U N C T I O N S */ 382 /************************************************************************/ 383 /************************************************************************/ 384 385 static inline void mos7840_set_port_private(struct usb_serial_port *port, 386 struct moschip_port *data) 387 { 388 usb_set_serial_port_data(port, (void *)data); 389 } 390 391 static inline struct moschip_port *mos7840_get_port_private(struct 392 usb_serial_port 393 *port) 394 { 395 return (struct moschip_port *)usb_get_serial_port_data(port); 396 } 397 398 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 399 { 400 struct moschip_port *mos7840_port; 401 struct async_icount *icount; 402 mos7840_port = port; 403 icount = &mos7840_port->icount; 404 if (new_msr & 405 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 406 MOS_MSR_DELTA_CD)) { 407 icount = &mos7840_port->icount; 408 409 /* update input line counters */ 410 if (new_msr & MOS_MSR_DELTA_CTS) { 411 icount->cts++; 412 smp_wmb(); 413 } 414 if (new_msr & MOS_MSR_DELTA_DSR) { 415 icount->dsr++; 416 smp_wmb(); 417 } 418 if (new_msr & MOS_MSR_DELTA_CD) { 419 icount->dcd++; 420 smp_wmb(); 421 } 422 if (new_msr & MOS_MSR_DELTA_RI) { 423 icount->rng++; 424 smp_wmb(); 425 } 426 } 427 } 428 429 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 430 { 431 struct async_icount *icount; 432 433 if (new_lsr & SERIAL_LSR_BI) { 434 /* 435 * Parity and Framing errors only count if they 436 * occur exclusive of a break being 437 * received. 438 */ 439 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 440 } 441 442 /* update input line counters */ 443 icount = &port->icount; 444 if (new_lsr & SERIAL_LSR_BI) { 445 icount->brk++; 446 smp_wmb(); 447 } 448 if (new_lsr & SERIAL_LSR_OE) { 449 icount->overrun++; 450 smp_wmb(); 451 } 452 if (new_lsr & SERIAL_LSR_PE) { 453 icount->parity++; 454 smp_wmb(); 455 } 456 if (new_lsr & SERIAL_LSR_FE) { 457 icount->frame++; 458 smp_wmb(); 459 } 460 } 461 462 /************************************************************************/ 463 /************************************************************************/ 464 /* U S B C A L L B A C K F U N C T I O N S */ 465 /* U S B C A L L B A C K F U N C T I O N S */ 466 /************************************************************************/ 467 /************************************************************************/ 468 469 static void mos7840_control_callback(struct urb *urb) 470 { 471 unsigned char *data; 472 struct moschip_port *mos7840_port; 473 struct device *dev = &urb->dev->dev; 474 __u8 regval = 0x0; 475 int status = urb->status; 476 477 mos7840_port = urb->context; 478 479 switch (status) { 480 case 0: 481 /* success */ 482 break; 483 case -ECONNRESET: 484 case -ENOENT: 485 case -ESHUTDOWN: 486 /* this urb is terminated, clean up */ 487 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); 488 return; 489 default: 490 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); 491 return; 492 } 493 494 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length); 495 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__, 496 mos7840_port->MsrLsr, mos7840_port->port_num); 497 data = urb->transfer_buffer; 498 regval = (__u8) data[0]; 499 dev_dbg(dev, "%s data is %x\n", __func__, regval); 500 if (mos7840_port->MsrLsr == 0) 501 mos7840_handle_new_msr(mos7840_port, regval); 502 else if (mos7840_port->MsrLsr == 1) 503 mos7840_handle_new_lsr(mos7840_port, regval); 504 } 505 506 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 507 __u16 *val) 508 { 509 struct usb_device *dev = mcs->port->serial->dev; 510 struct usb_ctrlrequest *dr = mcs->dr; 511 unsigned char *buffer = mcs->ctrl_buf; 512 int ret; 513 514 dr->bRequestType = MCS_RD_RTYPE; 515 dr->bRequest = MCS_RDREQ; 516 dr->wValue = cpu_to_le16(Wval); /* 0 */ 517 dr->wIndex = cpu_to_le16(reg); 518 dr->wLength = cpu_to_le16(2); 519 520 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 521 (unsigned char *)dr, buffer, 2, 522 mos7840_control_callback, mcs); 523 mcs->control_urb->transfer_buffer_length = 2; 524 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 525 return ret; 526 } 527 528 static void mos7840_set_led_callback(struct urb *urb) 529 { 530 switch (urb->status) { 531 case 0: 532 /* Success */ 533 break; 534 case -ECONNRESET: 535 case -ENOENT: 536 case -ESHUTDOWN: 537 /* This urb is terminated, clean up */ 538 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d", 539 __func__, urb->status); 540 break; 541 default: 542 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d", 543 __func__, urb->status); 544 } 545 } 546 547 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, 548 __u16 reg) 549 { 550 struct usb_device *dev = mcs->port->serial->dev; 551 struct usb_ctrlrequest *dr = mcs->dr; 552 553 dr->bRequestType = MCS_WR_RTYPE; 554 dr->bRequest = MCS_WRREQ; 555 dr->wValue = cpu_to_le16(wval); 556 dr->wIndex = cpu_to_le16(reg); 557 dr->wLength = cpu_to_le16(0); 558 559 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0), 560 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL); 561 562 usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 563 } 564 565 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, 566 __u16 val) 567 { 568 struct usb_device *dev = port->serial->dev; 569 570 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, 571 val, reg, NULL, 0, MOS_WDR_TIMEOUT); 572 } 573 574 static void mos7840_led_off(unsigned long arg) 575 { 576 struct moschip_port *mcs = (struct moschip_port *) arg; 577 578 /* Turn off LED */ 579 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER); 580 mod_timer(&mcs->led_timer2, 581 jiffies + msecs_to_jiffies(LED_OFF_MS)); 582 } 583 584 static void mos7840_led_flag_off(unsigned long arg) 585 { 586 struct moschip_port *mcs = (struct moschip_port *) arg; 587 588 mcs->led_flag = false; 589 } 590 591 /***************************************************************************** 592 * mos7840_interrupt_callback 593 * this is the callback function for when we have received data on the 594 * interrupt endpoint. 595 *****************************************************************************/ 596 597 static void mos7840_interrupt_callback(struct urb *urb) 598 { 599 int result; 600 int length; 601 struct moschip_port *mos7840_port; 602 struct usb_serial *serial; 603 __u16 Data; 604 unsigned char *data; 605 __u8 sp[5], st; 606 int i, rv = 0; 607 __u16 wval, wreg = 0; 608 int status = urb->status; 609 610 switch (status) { 611 case 0: 612 /* success */ 613 break; 614 case -ECONNRESET: 615 case -ENOENT: 616 case -ESHUTDOWN: 617 /* this urb is terminated, clean up */ 618 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 619 __func__, status); 620 return; 621 default: 622 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", 623 __func__, status); 624 goto exit; 625 } 626 627 length = urb->actual_length; 628 data = urb->transfer_buffer; 629 630 serial = urb->context; 631 632 /* Moschip get 5 bytes 633 * Byte 1 IIR Port 1 (port.number is 0) 634 * Byte 2 IIR Port 2 (port.number is 1) 635 * Byte 3 IIR Port 3 (port.number is 2) 636 * Byte 4 IIR Port 4 (port.number is 3) 637 * Byte 5 FIFO status for both */ 638 639 if (length && length > 5) { 640 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n"); 641 return; 642 } 643 644 sp[0] = (__u8) data[0]; 645 sp[1] = (__u8) data[1]; 646 sp[2] = (__u8) data[2]; 647 sp[3] = (__u8) data[3]; 648 st = (__u8) data[4]; 649 650 for (i = 0; i < serial->num_ports; i++) { 651 mos7840_port = mos7840_get_port_private(serial->port[i]); 652 wval = 653 (((__u16) serial->port[i]->number - 654 (__u16) (serial->minor)) + 1) << 8; 655 if (mos7840_port->open) { 656 if (sp[i] & 0x01) { 657 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i); 658 } else { 659 switch (sp[i] & 0x0f) { 660 case SERIAL_IIR_RLS: 661 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i); 662 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n"); 663 mos7840_port->MsrLsr = 1; 664 wreg = LINE_STATUS_REGISTER; 665 break; 666 case SERIAL_IIR_MS: 667 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i); 668 mos7840_port->MsrLsr = 0; 669 wreg = MODEM_STATUS_REGISTER; 670 break; 671 } 672 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 673 } 674 } 675 } 676 if (!(rv < 0)) 677 /* the completion handler for the control urb will resubmit */ 678 return; 679 exit: 680 result = usb_submit_urb(urb, GFP_ATOMIC); 681 if (result) { 682 dev_err(&urb->dev->dev, 683 "%s - Error %d submitting interrupt urb\n", 684 __func__, result); 685 } 686 } 687 688 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 689 const char *function) 690 { 691 if (!port) { 692 pr_debug("%s - port == NULL\n", function); 693 return -1; 694 } 695 if (!port->serial) { 696 pr_debug("%s - port->serial == NULL\n", function); 697 return -1; 698 } 699 700 return 0; 701 } 702 703 /* Inline functions to check the sanity of a pointer that is passed to us */ 704 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 705 const char *function) 706 { 707 if (!serial) { 708 pr_debug("%s - serial == NULL\n", function); 709 return -1; 710 } 711 if (!serial->type) { 712 pr_debug("%s - serial->type == NULL!\n", function); 713 return -1; 714 } 715 716 return 0; 717 } 718 719 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 720 const char *function) 721 { 722 /* if no port was specified, or it fails a paranoia check */ 723 if (!port || 724 mos7840_port_paranoia_check(port, function) || 725 mos7840_serial_paranoia_check(port->serial, function)) { 726 /* then say that we don't have a valid usb_serial thing, 727 * which will end up genrating -ENODEV return values */ 728 return NULL; 729 } 730 731 return port->serial; 732 } 733 734 /***************************************************************************** 735 * mos7840_bulk_in_callback 736 * this is the callback function for when we have received data on the 737 * bulk in endpoint. 738 *****************************************************************************/ 739 740 static void mos7840_bulk_in_callback(struct urb *urb) 741 { 742 int retval; 743 unsigned char *data; 744 struct usb_serial *serial; 745 struct usb_serial_port *port; 746 struct moschip_port *mos7840_port; 747 struct tty_struct *tty; 748 int status = urb->status; 749 750 mos7840_port = urb->context; 751 if (!mos7840_port) 752 return; 753 754 if (status) { 755 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); 756 mos7840_port->read_urb_busy = false; 757 return; 758 } 759 760 port = mos7840_port->port; 761 if (mos7840_port_paranoia_check(port, __func__)) { 762 mos7840_port->read_urb_busy = false; 763 return; 764 } 765 766 serial = mos7840_get_usb_serial(port, __func__); 767 if (!serial) { 768 mos7840_port->read_urb_busy = false; 769 return; 770 } 771 772 data = urb->transfer_buffer; 773 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); 774 775 if (urb->actual_length) { 776 tty = tty_port_tty_get(&mos7840_port->port->port); 777 if (tty) { 778 tty_insert_flip_string(tty, data, urb->actual_length); 779 tty_flip_buffer_push(tty); 780 tty_kref_put(tty); 781 } 782 mos7840_port->icount.rx += urb->actual_length; 783 smp_wmb(); 784 dev_dbg(&port->dev, "mos7840_port->icount.rx is %d:\n", mos7840_port->icount.rx); 785 } 786 787 if (!mos7840_port->read_urb) { 788 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n"); 789 mos7840_port->read_urb_busy = false; 790 return; 791 } 792 793 /* Turn on LED */ 794 if (mos7840_port->has_led && !mos7840_port->led_flag) { 795 mos7840_port->led_flag = true; 796 mos7840_set_led_async(mos7840_port, 0x0301, 797 MODEM_CONTROL_REGISTER); 798 mod_timer(&mos7840_port->led_timer1, 799 jiffies + msecs_to_jiffies(LED_ON_MS)); 800 } 801 802 mos7840_port->read_urb_busy = true; 803 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 804 805 if (retval) { 806 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); 807 mos7840_port->read_urb_busy = false; 808 } 809 } 810 811 /***************************************************************************** 812 * mos7840_bulk_out_data_callback 813 * this is the callback function for when we have finished sending 814 * serial data on the bulk out endpoint. 815 *****************************************************************************/ 816 817 static void mos7840_bulk_out_data_callback(struct urb *urb) 818 { 819 struct moschip_port *mos7840_port; 820 struct usb_serial_port *port; 821 struct tty_struct *tty; 822 int status = urb->status; 823 int i; 824 825 mos7840_port = urb->context; 826 port = mos7840_port->port; 827 spin_lock(&mos7840_port->pool_lock); 828 for (i = 0; i < NUM_URBS; i++) { 829 if (urb == mos7840_port->write_urb_pool[i]) { 830 mos7840_port->busy[i] = 0; 831 break; 832 } 833 } 834 spin_unlock(&mos7840_port->pool_lock); 835 836 if (status) { 837 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status); 838 return; 839 } 840 841 if (mos7840_port_paranoia_check(port, __func__)) 842 return; 843 844 tty = tty_port_tty_get(&port->port); 845 if (tty && mos7840_port->open) 846 tty_wakeup(tty); 847 tty_kref_put(tty); 848 849 } 850 851 /************************************************************************/ 852 /* 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 */ 853 /************************************************************************/ 854 #ifdef MCSSerialProbe 855 static int mos7840_serial_probe(struct usb_serial *serial, 856 const struct usb_device_id *id) 857 { 858 859 /*need to implement the mode_reg reading and updating\ 860 structures usb_serial_ device_type\ 861 (i.e num_ports, num_bulkin,bulkout etc) */ 862 /* Also we can update the changes attach */ 863 return 1; 864 } 865 #endif 866 867 /***************************************************************************** 868 * mos7840_open 869 * this function is called by the tty driver when a port is opened 870 * If successful, we return 0 871 * Otherwise we return a negative error number. 872 *****************************************************************************/ 873 874 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 875 { 876 int response; 877 int j; 878 struct usb_serial *serial; 879 struct urb *urb; 880 __u16 Data; 881 int status; 882 struct moschip_port *mos7840_port; 883 struct moschip_port *port0; 884 885 if (mos7840_port_paranoia_check(port, __func__)) 886 return -ENODEV; 887 888 serial = port->serial; 889 890 if (mos7840_serial_paranoia_check(serial, __func__)) 891 return -ENODEV; 892 893 mos7840_port = mos7840_get_port_private(port); 894 port0 = mos7840_get_port_private(serial->port[0]); 895 896 if (mos7840_port == NULL || port0 == NULL) 897 return -ENODEV; 898 899 usb_clear_halt(serial->dev, port->write_urb->pipe); 900 usb_clear_halt(serial->dev, port->read_urb->pipe); 901 port0->open_ports++; 902 903 /* Initialising the write urb pool */ 904 for (j = 0; j < NUM_URBS; ++j) { 905 urb = usb_alloc_urb(0, GFP_KERNEL); 906 mos7840_port->write_urb_pool[j] = urb; 907 908 if (urb == NULL) { 909 dev_err(&port->dev, "No more urbs???\n"); 910 continue; 911 } 912 913 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 914 GFP_KERNEL); 915 if (!urb->transfer_buffer) { 916 usb_free_urb(urb); 917 mos7840_port->write_urb_pool[j] = NULL; 918 dev_err(&port->dev, 919 "%s-out of memory for urb buffers.\n", 920 __func__); 921 continue; 922 } 923 } 924 925 /***************************************************************************** 926 * Initialize MCS7840 -- Write Init values to corresponding Registers 927 * 928 * Register Index 929 * 1 : IER 930 * 2 : FCR 931 * 3 : LCR 932 * 4 : MCR 933 * 934 * 0x08 : SP1/2 Control Reg 935 *****************************************************************************/ 936 937 /* NEED to check the following Block */ 938 939 Data = 0x0; 940 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 941 if (status < 0) { 942 dev_dbg(&port->dev, "Reading Spreg failed\n"); 943 return -1; 944 } 945 Data |= 0x80; 946 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 947 if (status < 0) { 948 dev_dbg(&port->dev, "writing Spreg failed\n"); 949 return -1; 950 } 951 952 Data &= ~0x80; 953 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 954 if (status < 0) { 955 dev_dbg(&port->dev, "writing Spreg failed\n"); 956 return -1; 957 } 958 /* End of block to be checked */ 959 960 Data = 0x0; 961 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 962 &Data); 963 if (status < 0) { 964 dev_dbg(&port->dev, "Reading Controlreg failed\n"); 965 return -1; 966 } 967 Data |= 0x08; /* Driver done bit */ 968 Data |= 0x20; /* rx_disable */ 969 status = mos7840_set_reg_sync(port, 970 mos7840_port->ControlRegOffset, Data); 971 if (status < 0) { 972 dev_dbg(&port->dev, "writing Controlreg failed\n"); 973 return -1; 974 } 975 /* do register settings here */ 976 /* Set all regs to the device default values. */ 977 /*********************************** 978 * First Disable all interrupts. 979 ***********************************/ 980 Data = 0x00; 981 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 982 if (status < 0) { 983 dev_dbg(&port->dev, "disabling interrupts failed\n"); 984 return -1; 985 } 986 /* Set FIFO_CONTROL_REGISTER to the default value */ 987 Data = 0x00; 988 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 989 if (status < 0) { 990 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 991 return -1; 992 } 993 994 Data = 0xcf; 995 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 996 if (status < 0) { 997 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 998 return -1; 999 } 1000 1001 Data = 0x03; 1002 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1003 mos7840_port->shadowLCR = Data; 1004 1005 Data = 0x0b; 1006 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1007 mos7840_port->shadowMCR = Data; 1008 1009 Data = 0x00; 1010 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1011 mos7840_port->shadowLCR = Data; 1012 1013 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1014 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1015 1016 Data = 0x0c; 1017 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1018 1019 Data = 0x0; 1020 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1021 1022 Data = 0x00; 1023 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1024 1025 Data = Data & ~SERIAL_LCR_DLAB; 1026 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1027 mos7840_port->shadowLCR = Data; 1028 1029 /* clearing Bulkin and Bulkout Fifo */ 1030 Data = 0x0; 1031 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 1032 1033 Data = Data | 0x0c; 1034 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1035 1036 Data = Data & ~0x0c; 1037 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1038 /* Finally enable all interrupts */ 1039 Data = 0x0c; 1040 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1041 1042 /* clearing rx_disable */ 1043 Data = 0x0; 1044 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1045 &Data); 1046 Data = Data & ~0x20; 1047 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1048 Data); 1049 1050 /* rx_negate */ 1051 Data = 0x0; 1052 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1053 &Data); 1054 Data = Data | 0x10; 1055 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1056 Data); 1057 1058 /* Check to see if we've set up our endpoint info yet * 1059 * (can't set it up in mos7840_startup as the structures * 1060 * were not set up at that time.) */ 1061 if (port0->open_ports == 1) { 1062 if (serial->port[0]->interrupt_in_buffer == NULL) { 1063 /* set up interrupt urb */ 1064 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1065 serial->dev, 1066 usb_rcvintpipe(serial->dev, 1067 serial->port[0]->interrupt_in_endpointAddress), 1068 serial->port[0]->interrupt_in_buffer, 1069 serial->port[0]->interrupt_in_urb-> 1070 transfer_buffer_length, 1071 mos7840_interrupt_callback, 1072 serial, 1073 serial->port[0]->interrupt_in_urb->interval); 1074 1075 /* start interrupt read for mos7840 * 1076 * will continue as long as mos7840 is connected */ 1077 1078 response = 1079 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1080 GFP_KERNEL); 1081 if (response) { 1082 dev_err(&port->dev, "%s - Error %d submitting " 1083 "interrupt urb\n", __func__, response); 1084 } 1085 1086 } 1087 1088 } 1089 1090 /* see if we've set up our endpoint info yet * 1091 * (can't set it up in mos7840_startup as the * 1092 * structures were not set up at that time.) */ 1093 1094 dev_dbg(&port->dev, "port number is %d\n", port->number); 1095 dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor); 1096 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress); 1097 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress); 1098 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress); 1099 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num); 1100 mos7840_port->read_urb = port->read_urb; 1101 1102 /* set up our bulk in urb */ 1103 if ((serial->num_ports == 2) 1104 && ((((__u16)port->number - 1105 (__u16)(port->serial->minor)) % 2) != 0)) { 1106 usb_fill_bulk_urb(mos7840_port->read_urb, 1107 serial->dev, 1108 usb_rcvbulkpipe(serial->dev, 1109 (port->bulk_in_endpointAddress) + 2), 1110 port->bulk_in_buffer, 1111 mos7840_port->read_urb->transfer_buffer_length, 1112 mos7840_bulk_in_callback, mos7840_port); 1113 } else { 1114 usb_fill_bulk_urb(mos7840_port->read_urb, 1115 serial->dev, 1116 usb_rcvbulkpipe(serial->dev, 1117 port->bulk_in_endpointAddress), 1118 port->bulk_in_buffer, 1119 mos7840_port->read_urb->transfer_buffer_length, 1120 mos7840_bulk_in_callback, mos7840_port); 1121 } 1122 1123 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress); 1124 mos7840_port->read_urb_busy = true; 1125 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1126 if (response) { 1127 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1128 __func__, response); 1129 mos7840_port->read_urb_busy = false; 1130 } 1131 1132 /* initialize our wait queues */ 1133 init_waitqueue_head(&mos7840_port->wait_chase); 1134 init_waitqueue_head(&mos7840_port->delta_msr_wait); 1135 1136 /* initialize our icount structure */ 1137 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount)); 1138 1139 /* initialize our port settings */ 1140 /* Must set to enable ints! */ 1141 mos7840_port->shadowMCR = MCR_MASTER_IE; 1142 /* send a open port command */ 1143 mos7840_port->open = 1; 1144 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1145 mos7840_port->icount.tx = 0; 1146 mos7840_port->icount.rx = 0; 1147 1148 return 0; 1149 } 1150 1151 /***************************************************************************** 1152 * mos7840_chars_in_buffer 1153 * this function is called by the tty driver when it wants to know how many 1154 * bytes of data we currently have outstanding in the port (data that has 1155 * been written, but hasn't made it out the port yet) 1156 * If successful, we return the number of bytes left to be written in the 1157 * system, 1158 * Otherwise we return zero. 1159 *****************************************************************************/ 1160 1161 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1162 { 1163 struct usb_serial_port *port = tty->driver_data; 1164 int i; 1165 int chars = 0; 1166 unsigned long flags; 1167 struct moschip_port *mos7840_port; 1168 1169 if (mos7840_port_paranoia_check(port, __func__)) 1170 return 0; 1171 1172 mos7840_port = mos7840_get_port_private(port); 1173 if (mos7840_port == NULL) 1174 return 0; 1175 1176 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1177 for (i = 0; i < NUM_URBS; ++i) { 1178 if (mos7840_port->busy[i]) { 1179 struct urb *urb = mos7840_port->write_urb_pool[i]; 1180 chars += urb->transfer_buffer_length; 1181 } 1182 } 1183 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1184 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 1185 return chars; 1186 1187 } 1188 1189 /***************************************************************************** 1190 * mos7840_close 1191 * this function is called by the tty driver when a port is closed 1192 *****************************************************************************/ 1193 1194 static void mos7840_close(struct usb_serial_port *port) 1195 { 1196 struct usb_serial *serial; 1197 struct moschip_port *mos7840_port; 1198 struct moschip_port *port0; 1199 int j; 1200 __u16 Data; 1201 1202 if (mos7840_port_paranoia_check(port, __func__)) 1203 return; 1204 1205 serial = mos7840_get_usb_serial(port, __func__); 1206 if (!serial) 1207 return; 1208 1209 mos7840_port = mos7840_get_port_private(port); 1210 port0 = mos7840_get_port_private(serial->port[0]); 1211 1212 if (mos7840_port == NULL || port0 == NULL) 1213 return; 1214 1215 for (j = 0; j < NUM_URBS; ++j) 1216 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1217 1218 /* Freeing Write URBs */ 1219 for (j = 0; j < NUM_URBS; ++j) { 1220 if (mos7840_port->write_urb_pool[j]) { 1221 if (mos7840_port->write_urb_pool[j]->transfer_buffer) 1222 kfree(mos7840_port->write_urb_pool[j]-> 1223 transfer_buffer); 1224 1225 usb_free_urb(mos7840_port->write_urb_pool[j]); 1226 } 1227 } 1228 1229 /* While closing port, shutdown all bulk read, write * 1230 * and interrupt read if they exists */ 1231 if (serial->dev) { 1232 if (mos7840_port->write_urb) { 1233 dev_dbg(&port->dev, "%s", "Shutdown bulk write\n"); 1234 usb_kill_urb(mos7840_port->write_urb); 1235 } 1236 if (mos7840_port->read_urb) { 1237 dev_dbg(&port->dev, "%s", "Shutdown bulk read\n"); 1238 usb_kill_urb(mos7840_port->read_urb); 1239 mos7840_port->read_urb_busy = false; 1240 } 1241 if ((&mos7840_port->control_urb)) { 1242 dev_dbg(&port->dev, "%s", "Shutdown control read\n"); 1243 /*/ usb_kill_urb (mos7840_port->control_urb); */ 1244 } 1245 } 1246 /* if(mos7840_port->ctrl_buf != NULL) */ 1247 /* kfree(mos7840_port->ctrl_buf); */ 1248 port0->open_ports--; 1249 dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number); 1250 if (port0->open_ports == 0) { 1251 if (serial->port[0]->interrupt_in_urb) { 1252 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n"); 1253 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1254 } 1255 } 1256 1257 if (mos7840_port->write_urb) { 1258 /* if this urb had a transfer buffer already (old tx) free it */ 1259 if (mos7840_port->write_urb->transfer_buffer != NULL) 1260 kfree(mos7840_port->write_urb->transfer_buffer); 1261 usb_free_urb(mos7840_port->write_urb); 1262 } 1263 1264 Data = 0x0; 1265 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1266 1267 Data = 0x00; 1268 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1269 1270 mos7840_port->open = 0; 1271 } 1272 1273 /************************************************************************ 1274 * 1275 * mos7840_block_until_chase_response 1276 * 1277 * This function will block the close until one of the following: 1278 * 1. Response to our Chase comes from mos7840 1279 * 2. A timeout of 10 seconds without activity has expired 1280 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty) 1281 * 1282 ************************************************************************/ 1283 1284 static void mos7840_block_until_chase_response(struct tty_struct *tty, 1285 struct moschip_port *mos7840_port) 1286 { 1287 int timeout = msecs_to_jiffies(1000); 1288 int wait = 10; 1289 int count; 1290 1291 while (1) { 1292 count = mos7840_chars_in_buffer(tty); 1293 1294 /* Check for Buffer status */ 1295 if (count <= 0) 1296 return; 1297 1298 /* Block the thread for a while */ 1299 interruptible_sleep_on_timeout(&mos7840_port->wait_chase, 1300 timeout); 1301 /* No activity.. count down section */ 1302 wait--; 1303 if (wait == 0) { 1304 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__); 1305 return; 1306 } else { 1307 /* Reset timeout value back to seconds */ 1308 wait = 10; 1309 } 1310 } 1311 1312 } 1313 1314 /***************************************************************************** 1315 * mos7840_break 1316 * this function sends a break to the port 1317 *****************************************************************************/ 1318 static void mos7840_break(struct tty_struct *tty, int break_state) 1319 { 1320 struct usb_serial_port *port = tty->driver_data; 1321 unsigned char data; 1322 struct usb_serial *serial; 1323 struct moschip_port *mos7840_port; 1324 1325 if (mos7840_port_paranoia_check(port, __func__)) 1326 return; 1327 1328 serial = mos7840_get_usb_serial(port, __func__); 1329 if (!serial) 1330 return; 1331 1332 mos7840_port = mos7840_get_port_private(port); 1333 1334 if (mos7840_port == NULL) 1335 return; 1336 1337 if (serial->dev) 1338 /* flush and block until tx is empty */ 1339 mos7840_block_until_chase_response(tty, mos7840_port); 1340 1341 if (break_state == -1) 1342 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1343 else 1344 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1345 1346 /* FIXME: no locking on shadowLCR anywhere in driver */ 1347 mos7840_port->shadowLCR = data; 1348 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1349 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1350 mos7840_port->shadowLCR); 1351 } 1352 1353 /***************************************************************************** 1354 * mos7840_write_room 1355 * this function is called by the tty driver when it wants to know how many 1356 * bytes of data we can accept for a specific port. 1357 * If successful, we return the amount of room that we have for this port 1358 * Otherwise we return a negative error number. 1359 *****************************************************************************/ 1360 1361 static int mos7840_write_room(struct tty_struct *tty) 1362 { 1363 struct usb_serial_port *port = tty->driver_data; 1364 int i; 1365 int room = 0; 1366 unsigned long flags; 1367 struct moschip_port *mos7840_port; 1368 1369 if (mos7840_port_paranoia_check(port, __func__)) 1370 return -1; 1371 1372 mos7840_port = mos7840_get_port_private(port); 1373 if (mos7840_port == NULL) 1374 return -1; 1375 1376 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1377 for (i = 0; i < NUM_URBS; ++i) { 1378 if (!mos7840_port->busy[i]) 1379 room += URB_TRANSFER_BUFFER_SIZE; 1380 } 1381 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1382 1383 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1384 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); 1385 return room; 1386 1387 } 1388 1389 /***************************************************************************** 1390 * mos7840_write 1391 * this function is called by the tty driver when data should be written to 1392 * the port. 1393 * If successful, we return the number of bytes written, otherwise we 1394 * return a negative error number. 1395 *****************************************************************************/ 1396 1397 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1398 const unsigned char *data, int count) 1399 { 1400 int status; 1401 int i; 1402 int bytes_sent = 0; 1403 int transfer_size; 1404 unsigned long flags; 1405 1406 struct moschip_port *mos7840_port; 1407 struct usb_serial *serial; 1408 struct urb *urb; 1409 /* __u16 Data; */ 1410 const unsigned char *current_position = data; 1411 unsigned char *data1; 1412 1413 #ifdef NOTMOS7840 1414 Data = 0x00; 1415 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1416 mos7840_port->shadowLCR = Data; 1417 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data); 1418 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1419 1420 /* Data = 0x03; */ 1421 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */ 1422 /* mos7840_port->shadowLCR=Data;//Need to add later */ 1423 1424 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 1425 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1426 1427 /* Data = 0x0c; */ 1428 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */ 1429 Data = 0x00; 1430 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data); 1431 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data); 1432 1433 Data = 0x0; 1434 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data); 1435 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data); 1436 1437 Data = Data & ~SERIAL_LCR_DLAB; 1438 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1439 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1440 #endif 1441 1442 if (mos7840_port_paranoia_check(port, __func__)) 1443 return -1; 1444 1445 serial = port->serial; 1446 if (mos7840_serial_paranoia_check(serial, __func__)) 1447 return -1; 1448 1449 mos7840_port = mos7840_get_port_private(port); 1450 if (mos7840_port == NULL) 1451 return -1; 1452 1453 /* try to find a free urb in the list */ 1454 urb = NULL; 1455 1456 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1457 for (i = 0; i < NUM_URBS; ++i) { 1458 if (!mos7840_port->busy[i]) { 1459 mos7840_port->busy[i] = 1; 1460 urb = mos7840_port->write_urb_pool[i]; 1461 dev_dbg(&port->dev, "URB:%d\n", i); 1462 break; 1463 } 1464 } 1465 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1466 1467 if (urb == NULL) { 1468 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); 1469 goto exit; 1470 } 1471 1472 if (urb->transfer_buffer == NULL) { 1473 urb->transfer_buffer = 1474 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1475 1476 if (urb->transfer_buffer == NULL) { 1477 dev_err_console(port, "%s no more kernel memory...\n", 1478 __func__); 1479 goto exit; 1480 } 1481 } 1482 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1483 1484 memcpy(urb->transfer_buffer, current_position, transfer_size); 1485 1486 /* fill urb with data and submit */ 1487 if ((serial->num_ports == 2) 1488 && ((((__u16)port->number - 1489 (__u16)(port->serial->minor)) % 2) != 0)) { 1490 usb_fill_bulk_urb(urb, 1491 serial->dev, 1492 usb_sndbulkpipe(serial->dev, 1493 (port->bulk_out_endpointAddress) + 2), 1494 urb->transfer_buffer, 1495 transfer_size, 1496 mos7840_bulk_out_data_callback, mos7840_port); 1497 } else { 1498 usb_fill_bulk_urb(urb, 1499 serial->dev, 1500 usb_sndbulkpipe(serial->dev, 1501 port->bulk_out_endpointAddress), 1502 urb->transfer_buffer, 1503 transfer_size, 1504 mos7840_bulk_out_data_callback, mos7840_port); 1505 } 1506 1507 data1 = urb->transfer_buffer; 1508 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); 1509 1510 /* Turn on LED */ 1511 if (mos7840_port->has_led && !mos7840_port->led_flag) { 1512 mos7840_port->led_flag = true; 1513 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301); 1514 mod_timer(&mos7840_port->led_timer1, 1515 jiffies + msecs_to_jiffies(LED_ON_MS)); 1516 } 1517 1518 /* send it down the pipe */ 1519 status = usb_submit_urb(urb, GFP_ATOMIC); 1520 1521 if (status) { 1522 mos7840_port->busy[i] = 0; 1523 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 1524 "with status = %d\n", __func__, status); 1525 bytes_sent = status; 1526 goto exit; 1527 } 1528 bytes_sent = transfer_size; 1529 mos7840_port->icount.tx += transfer_size; 1530 smp_wmb(); 1531 dev_dbg(&port->dev, "mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx); 1532 exit: 1533 return bytes_sent; 1534 1535 } 1536 1537 /***************************************************************************** 1538 * mos7840_throttle 1539 * this function is called by the tty driver when it wants to stop the data 1540 * being read from the port. 1541 *****************************************************************************/ 1542 1543 static void mos7840_throttle(struct tty_struct *tty) 1544 { 1545 struct usb_serial_port *port = tty->driver_data; 1546 struct moschip_port *mos7840_port; 1547 int status; 1548 1549 if (mos7840_port_paranoia_check(port, __func__)) 1550 return; 1551 1552 mos7840_port = mos7840_get_port_private(port); 1553 1554 if (mos7840_port == NULL) 1555 return; 1556 1557 if (!mos7840_port->open) { 1558 dev_dbg(&port->dev, "%s", "port not opened\n"); 1559 return; 1560 } 1561 1562 /* if we are implementing XON/XOFF, send the stop character */ 1563 if (I_IXOFF(tty)) { 1564 unsigned char stop_char = STOP_CHAR(tty); 1565 status = mos7840_write(tty, port, &stop_char, 1); 1566 if (status <= 0) 1567 return; 1568 } 1569 /* if we are implementing RTS/CTS, toggle that line */ 1570 if (tty->termios.c_cflag & CRTSCTS) { 1571 mos7840_port->shadowMCR &= ~MCR_RTS; 1572 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1573 mos7840_port->shadowMCR); 1574 if (status < 0) 1575 return; 1576 } 1577 } 1578 1579 /***************************************************************************** 1580 * mos7840_unthrottle 1581 * this function is called by the tty driver when it wants to resume 1582 * the data being read from the port (called after mos7840_throttle is 1583 * called) 1584 *****************************************************************************/ 1585 static void mos7840_unthrottle(struct tty_struct *tty) 1586 { 1587 struct usb_serial_port *port = tty->driver_data; 1588 int status; 1589 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1590 1591 if (mos7840_port_paranoia_check(port, __func__)) 1592 return; 1593 1594 if (mos7840_port == NULL) 1595 return; 1596 1597 if (!mos7840_port->open) { 1598 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1599 return; 1600 } 1601 1602 /* if we are implementing XON/XOFF, send the start character */ 1603 if (I_IXOFF(tty)) { 1604 unsigned char start_char = START_CHAR(tty); 1605 status = mos7840_write(tty, port, &start_char, 1); 1606 if (status <= 0) 1607 return; 1608 } 1609 1610 /* if we are implementing RTS/CTS, toggle that line */ 1611 if (tty->termios.c_cflag & CRTSCTS) { 1612 mos7840_port->shadowMCR |= MCR_RTS; 1613 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1614 mos7840_port->shadowMCR); 1615 if (status < 0) 1616 return; 1617 } 1618 } 1619 1620 static int mos7840_tiocmget(struct tty_struct *tty) 1621 { 1622 struct usb_serial_port *port = tty->driver_data; 1623 struct moschip_port *mos7840_port; 1624 unsigned int result; 1625 __u16 msr; 1626 __u16 mcr; 1627 int status; 1628 mos7840_port = mos7840_get_port_private(port); 1629 1630 if (mos7840_port == NULL) 1631 return -ENODEV; 1632 1633 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1634 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1635 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1636 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1637 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1638 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1639 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1640 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1641 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1642 1643 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 1644 1645 return result; 1646 } 1647 1648 static int mos7840_tiocmset(struct tty_struct *tty, 1649 unsigned int set, unsigned int clear) 1650 { 1651 struct usb_serial_port *port = tty->driver_data; 1652 struct moschip_port *mos7840_port; 1653 unsigned int mcr; 1654 int status; 1655 1656 mos7840_port = mos7840_get_port_private(port); 1657 1658 if (mos7840_port == NULL) 1659 return -ENODEV; 1660 1661 /* FIXME: What locks the port registers ? */ 1662 mcr = mos7840_port->shadowMCR; 1663 if (clear & TIOCM_RTS) 1664 mcr &= ~MCR_RTS; 1665 if (clear & TIOCM_DTR) 1666 mcr &= ~MCR_DTR; 1667 if (clear & TIOCM_LOOP) 1668 mcr &= ~MCR_LOOPBACK; 1669 1670 if (set & TIOCM_RTS) 1671 mcr |= MCR_RTS; 1672 if (set & TIOCM_DTR) 1673 mcr |= MCR_DTR; 1674 if (set & TIOCM_LOOP) 1675 mcr |= MCR_LOOPBACK; 1676 1677 mos7840_port->shadowMCR = mcr; 1678 1679 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1680 if (status < 0) { 1681 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); 1682 return status; 1683 } 1684 1685 return 0; 1686 } 1687 1688 /***************************************************************************** 1689 * mos7840_calc_baud_rate_divisor 1690 * this function calculates the proper baud rate divisor for the specified 1691 * baud rate. 1692 *****************************************************************************/ 1693 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, 1694 int baudRate, int *divisor, 1695 __u16 *clk_sel_val) 1696 { 1697 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); 1698 1699 if (baudRate <= 115200) { 1700 *divisor = 115200 / baudRate; 1701 *clk_sel_val = 0x0; 1702 } 1703 if ((baudRate > 115200) && (baudRate <= 230400)) { 1704 *divisor = 230400 / baudRate; 1705 *clk_sel_val = 0x10; 1706 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1707 *divisor = 403200 / baudRate; 1708 *clk_sel_val = 0x20; 1709 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1710 *divisor = 460800 / baudRate; 1711 *clk_sel_val = 0x30; 1712 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1713 *divisor = 806400 / baudRate; 1714 *clk_sel_val = 0x40; 1715 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1716 *divisor = 921600 / baudRate; 1717 *clk_sel_val = 0x50; 1718 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1719 *divisor = 1572864 / baudRate; 1720 *clk_sel_val = 0x60; 1721 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1722 *divisor = 3145728 / baudRate; 1723 *clk_sel_val = 0x70; 1724 } 1725 return 0; 1726 1727 #ifdef NOTMCS7840 1728 1729 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) { 1730 if (mos7840_divisor_table[i].BaudRate == baudrate) { 1731 *divisor = mos7840_divisor_table[i].Divisor; 1732 return 0; 1733 } 1734 } 1735 1736 /* After trying for all the standard baud rates * 1737 * Try calculating the divisor for this baud rate */ 1738 1739 if (baudrate > 75 && baudrate < 230400) { 1740 /* get the divisor */ 1741 custom = (__u16) (230400L / baudrate); 1742 1743 /* Check for round off */ 1744 round1 = (__u16) (2304000L / baudrate); 1745 round = (__u16) (round1 - (custom * 10)); 1746 if (round > 4) 1747 custom++; 1748 *divisor = custom; 1749 1750 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom); 1751 return 0; 1752 } 1753 1754 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n"); 1755 return -1; 1756 #endif 1757 } 1758 1759 /***************************************************************************** 1760 * mos7840_send_cmd_write_baud_rate 1761 * this function sends the proper command to change the baud rate of the 1762 * specified port. 1763 *****************************************************************************/ 1764 1765 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1766 int baudRate) 1767 { 1768 int divisor = 0; 1769 int status; 1770 __u16 Data; 1771 unsigned char number; 1772 __u16 clk_sel_val; 1773 struct usb_serial_port *port; 1774 1775 if (mos7840_port == NULL) 1776 return -1; 1777 1778 port = mos7840_port->port; 1779 if (mos7840_port_paranoia_check(port, __func__)) 1780 return -1; 1781 1782 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1783 return -1; 1784 1785 number = mos7840_port->port->number - mos7840_port->port->serial->minor; 1786 1787 dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__, 1788 mos7840_port->port->number, baudRate); 1789 /* reset clk_uart_sel in spregOffset */ 1790 if (baudRate > 115200) { 1791 #ifdef HW_flow_control 1792 /* NOTE: need to see the pther register to modify */ 1793 /* setting h/w flow control bit to 1 */ 1794 Data = 0x2b; 1795 mos7840_port->shadowMCR = Data; 1796 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1797 Data); 1798 if (status < 0) { 1799 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1800 return -1; 1801 } 1802 #endif 1803 1804 } else { 1805 #ifdef HW_flow_control 1806 /* setting h/w flow control bit to 0 */ 1807 Data = 0xb; 1808 mos7840_port->shadowMCR = Data; 1809 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1810 Data); 1811 if (status < 0) { 1812 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1813 return -1; 1814 } 1815 #endif 1816 1817 } 1818 1819 if (1) { /* baudRate <= 115200) */ 1820 clk_sel_val = 0x0; 1821 Data = 0x0; 1822 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, 1823 &clk_sel_val); 1824 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1825 &Data); 1826 if (status < 0) { 1827 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); 1828 return -1; 1829 } 1830 Data = (Data & 0x8f) | clk_sel_val; 1831 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1832 Data); 1833 if (status < 0) { 1834 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1835 return -1; 1836 } 1837 /* Calculate the Divisor */ 1838 1839 if (status) { 1840 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1841 return status; 1842 } 1843 /* Enable access to divisor latch */ 1844 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1845 mos7840_port->shadowLCR = Data; 1846 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1847 1848 /* Write the divisor */ 1849 Data = (unsigned char)(divisor & 0xff); 1850 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); 1851 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1852 1853 Data = (unsigned char)((divisor & 0xff00) >> 8); 1854 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); 1855 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1856 1857 /* Disable access to divisor latch */ 1858 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1859 mos7840_port->shadowLCR = Data; 1860 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1861 1862 } 1863 return status; 1864 } 1865 1866 /***************************************************************************** 1867 * mos7840_change_port_settings 1868 * This routine is called to set the UART on the device to match 1869 * the specified new settings. 1870 *****************************************************************************/ 1871 1872 static void mos7840_change_port_settings(struct tty_struct *tty, 1873 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1874 { 1875 int baud; 1876 unsigned cflag; 1877 unsigned iflag; 1878 __u8 lData; 1879 __u8 lParity; 1880 __u8 lStop; 1881 int status; 1882 __u16 Data; 1883 struct usb_serial_port *port; 1884 struct usb_serial *serial; 1885 1886 if (mos7840_port == NULL) 1887 return; 1888 1889 port = mos7840_port->port; 1890 1891 if (mos7840_port_paranoia_check(port, __func__)) 1892 return; 1893 1894 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1895 return; 1896 1897 serial = port->serial; 1898 1899 if (!mos7840_port->open) { 1900 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1901 return; 1902 } 1903 1904 lData = LCR_BITS_8; 1905 lStop = LCR_STOP_1; 1906 lParity = LCR_PAR_NONE; 1907 1908 cflag = tty->termios.c_cflag; 1909 iflag = tty->termios.c_iflag; 1910 1911 /* Change the number of bits */ 1912 if (cflag & CSIZE) { 1913 switch (cflag & CSIZE) { 1914 case CS5: 1915 lData = LCR_BITS_5; 1916 break; 1917 1918 case CS6: 1919 lData = LCR_BITS_6; 1920 break; 1921 1922 case CS7: 1923 lData = LCR_BITS_7; 1924 break; 1925 default: 1926 case CS8: 1927 lData = LCR_BITS_8; 1928 break; 1929 } 1930 } 1931 /* Change the Parity bit */ 1932 if (cflag & PARENB) { 1933 if (cflag & PARODD) { 1934 lParity = LCR_PAR_ODD; 1935 dev_dbg(&port->dev, "%s - parity = odd\n", __func__); 1936 } else { 1937 lParity = LCR_PAR_EVEN; 1938 dev_dbg(&port->dev, "%s - parity = even\n", __func__); 1939 } 1940 1941 } else { 1942 dev_dbg(&port->dev, "%s - parity = none\n", __func__); 1943 } 1944 1945 if (cflag & CMSPAR) 1946 lParity = lParity | 0x20; 1947 1948 /* Change the Stop bit */ 1949 if (cflag & CSTOPB) { 1950 lStop = LCR_STOP_2; 1951 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); 1952 } else { 1953 lStop = LCR_STOP_1; 1954 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); 1955 } 1956 1957 /* Update the LCR with the correct value */ 1958 mos7840_port->shadowLCR &= 1959 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1960 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1961 1962 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, 1963 mos7840_port->shadowLCR); 1964 /* Disable Interrupts */ 1965 Data = 0x00; 1966 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1967 1968 Data = 0x00; 1969 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1970 1971 Data = 0xcf; 1972 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1973 1974 /* Send the updated LCR value to the mos7840 */ 1975 Data = mos7840_port->shadowLCR; 1976 1977 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1978 1979 Data = 0x00b; 1980 mos7840_port->shadowMCR = Data; 1981 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1982 Data = 0x00b; 1983 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1984 1985 /* set up the MCR register and send it to the mos7840 */ 1986 1987 mos7840_port->shadowMCR = MCR_MASTER_IE; 1988 if (cflag & CBAUD) 1989 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1990 1991 if (cflag & CRTSCTS) 1992 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1993 else 1994 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 1995 1996 Data = mos7840_port->shadowMCR; 1997 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1998 1999 /* Determine divisor based on baud rate */ 2000 baud = tty_get_baud_rate(tty); 2001 2002 if (!baud) { 2003 /* pick a default, any default... */ 2004 dev_dbg(&port->dev, "%s", "Picked default baud...\n"); 2005 baud = 9600; 2006 } 2007 2008 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); 2009 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 2010 2011 /* Enable Interrupts */ 2012 Data = 0x0c; 2013 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 2014 2015 if (mos7840_port->read_urb_busy == false) { 2016 mos7840_port->read_urb_busy = true; 2017 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2018 if (status) { 2019 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 2020 status); 2021 mos7840_port->read_urb_busy = false; 2022 } 2023 } 2024 wake_up(&mos7840_port->delta_msr_wait); 2025 mos7840_port->delta_msr_cond = 1; 2026 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, 2027 mos7840_port->shadowLCR); 2028 } 2029 2030 /***************************************************************************** 2031 * mos7840_set_termios 2032 * this function is called by the tty driver when it wants to change 2033 * the termios structure 2034 *****************************************************************************/ 2035 2036 static void mos7840_set_termios(struct tty_struct *tty, 2037 struct usb_serial_port *port, 2038 struct ktermios *old_termios) 2039 { 2040 int status; 2041 unsigned int cflag; 2042 struct usb_serial *serial; 2043 struct moschip_port *mos7840_port; 2044 2045 if (mos7840_port_paranoia_check(port, __func__)) 2046 return; 2047 2048 serial = port->serial; 2049 2050 if (mos7840_serial_paranoia_check(serial, __func__)) 2051 return; 2052 2053 mos7840_port = mos7840_get_port_private(port); 2054 2055 if (mos7840_port == NULL) 2056 return; 2057 2058 if (!mos7840_port->open) { 2059 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 2060 return; 2061 } 2062 2063 dev_dbg(&port->dev, "%s", "setting termios - \n"); 2064 2065 cflag = tty->termios.c_cflag; 2066 2067 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, 2068 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); 2069 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, 2070 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 2071 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number); 2072 2073 /* change the port settings to the new ones specified */ 2074 2075 mos7840_change_port_settings(tty, mos7840_port, old_termios); 2076 2077 if (!mos7840_port->read_urb) { 2078 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n"); 2079 return; 2080 } 2081 2082 if (mos7840_port->read_urb_busy == false) { 2083 mos7840_port->read_urb_busy = true; 2084 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 2085 if (status) { 2086 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 2087 status); 2088 mos7840_port->read_urb_busy = false; 2089 } 2090 } 2091 } 2092 2093 /***************************************************************************** 2094 * mos7840_get_lsr_info - get line status register info 2095 * 2096 * Purpose: Let user call ioctl() to get info when the UART physically 2097 * is emptied. On bus types like RS485, the transmitter must 2098 * release the bus after transmitting. This must be done when 2099 * the transmit shift register is empty, not be done when the 2100 * transmit holding register is empty. This functionality 2101 * allows an RS485 driver to be written in user space. 2102 *****************************************************************************/ 2103 2104 static int mos7840_get_lsr_info(struct tty_struct *tty, 2105 unsigned int __user *value) 2106 { 2107 int count; 2108 unsigned int result = 0; 2109 2110 count = mos7840_chars_in_buffer(tty); 2111 if (count == 0) 2112 result = TIOCSER_TEMT; 2113 2114 if (copy_to_user(value, &result, sizeof(int))) 2115 return -EFAULT; 2116 return 0; 2117 } 2118 2119 /***************************************************************************** 2120 * mos7840_get_serial_info 2121 * function to get information about serial port 2122 *****************************************************************************/ 2123 2124 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 2125 struct serial_struct __user *retinfo) 2126 { 2127 struct serial_struct tmp; 2128 2129 if (mos7840_port == NULL) 2130 return -1; 2131 2132 if (!retinfo) 2133 return -EFAULT; 2134 2135 memset(&tmp, 0, sizeof(tmp)); 2136 2137 tmp.type = PORT_16550A; 2138 tmp.line = mos7840_port->port->serial->minor; 2139 tmp.port = mos7840_port->port->number; 2140 tmp.irq = 0; 2141 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2142 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 2143 tmp.baud_base = 9600; 2144 tmp.close_delay = 5 * HZ; 2145 tmp.closing_wait = 30 * HZ; 2146 2147 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2148 return -EFAULT; 2149 return 0; 2150 } 2151 2152 static int mos7840_get_icount(struct tty_struct *tty, 2153 struct serial_icounter_struct *icount) 2154 { 2155 struct usb_serial_port *port = tty->driver_data; 2156 struct moschip_port *mos7840_port; 2157 struct async_icount cnow; 2158 2159 mos7840_port = mos7840_get_port_private(port); 2160 cnow = mos7840_port->icount; 2161 2162 smp_rmb(); 2163 icount->cts = cnow.cts; 2164 icount->dsr = cnow.dsr; 2165 icount->rng = cnow.rng; 2166 icount->dcd = cnow.dcd; 2167 icount->rx = cnow.rx; 2168 icount->tx = cnow.tx; 2169 icount->frame = cnow.frame; 2170 icount->overrun = cnow.overrun; 2171 icount->parity = cnow.parity; 2172 icount->brk = cnow.brk; 2173 icount->buf_overrun = cnow.buf_overrun; 2174 2175 dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", __func__, 2176 icount->rx, icount->tx); 2177 return 0; 2178 } 2179 2180 /***************************************************************************** 2181 * SerialIoctl 2182 * this function handles any ioctl calls to the driver 2183 *****************************************************************************/ 2184 2185 static int mos7840_ioctl(struct tty_struct *tty, 2186 unsigned int cmd, unsigned long arg) 2187 { 2188 struct usb_serial_port *port = tty->driver_data; 2189 void __user *argp = (void __user *)arg; 2190 struct moschip_port *mos7840_port; 2191 2192 struct async_icount cnow; 2193 struct async_icount cprev; 2194 2195 if (mos7840_port_paranoia_check(port, __func__)) 2196 return -1; 2197 2198 mos7840_port = mos7840_get_port_private(port); 2199 2200 if (mos7840_port == NULL) 2201 return -1; 2202 2203 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd); 2204 2205 switch (cmd) { 2206 /* return number of bytes available */ 2207 2208 case TIOCSERGETLSR: 2209 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 2210 return mos7840_get_lsr_info(tty, argp); 2211 2212 case TIOCGSERIAL: 2213 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); 2214 return mos7840_get_serial_info(mos7840_port, argp); 2215 2216 case TIOCSSERIAL: 2217 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__); 2218 break; 2219 2220 case TIOCMIWAIT: 2221 dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__); 2222 cprev = mos7840_port->icount; 2223 while (1) { 2224 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */ 2225 mos7840_port->delta_msr_cond = 0; 2226 wait_event_interruptible(mos7840_port->delta_msr_wait, 2227 (mos7840_port-> 2228 delta_msr_cond == 1)); 2229 2230 /* see if a signal did it */ 2231 if (signal_pending(current)) 2232 return -ERESTARTSYS; 2233 cnow = mos7840_port->icount; 2234 smp_rmb(); 2235 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2236 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2237 return -EIO; /* no change => error */ 2238 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2239 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2240 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2241 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2242 return 0; 2243 } 2244 cprev = cnow; 2245 } 2246 /* NOTREACHED */ 2247 break; 2248 2249 default: 2250 break; 2251 } 2252 return -ENOIOCTLCMD; 2253 } 2254 2255 static int mos7810_check(struct usb_serial *serial) 2256 { 2257 int i, pass_count = 0; 2258 __u16 data = 0, mcr_data = 0; 2259 __u16 test_pattern = 0x55AA; 2260 2261 /* Store MCR setting */ 2262 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2263 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, 2264 &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2265 2266 for (i = 0; i < 16; i++) { 2267 /* Send the 1-bit test pattern out to MCS7810 test pin */ 2268 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2269 MCS_WRREQ, MCS_WR_RTYPE, 2270 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), 2271 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); 2272 2273 /* Read the test pattern back */ 2274 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2275 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data, 2276 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2277 2278 /* If this is a MCS7810 device, both test patterns must match */ 2279 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) 2280 break; 2281 2282 pass_count++; 2283 } 2284 2285 /* Restore MCR setting */ 2286 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, 2287 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 2288 0, MOS_WDR_TIMEOUT); 2289 2290 if (pass_count == 16) 2291 return 1; 2292 2293 return 0; 2294 } 2295 2296 static int mos7840_calc_num_ports(struct usb_serial *serial) 2297 { 2298 __u16 data = 0x00; 2299 int mos7840_num_ports; 2300 2301 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2302 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data, 2303 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2304 2305 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 || 2306 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) { 2307 device_type = serial->dev->descriptor.idProduct; 2308 } else { 2309 /* For a MCS7840 device GPIO0 must be set to 1 */ 2310 if ((data & 0x01) == 1) 2311 device_type = MOSCHIP_DEVICE_ID_7840; 2312 else if (mos7810_check(serial)) 2313 device_type = MOSCHIP_DEVICE_ID_7810; 2314 else 2315 device_type = MOSCHIP_DEVICE_ID_7820; 2316 } 2317 2318 mos7840_num_ports = (device_type >> 4) & 0x000F; 2319 serial->num_bulk_in = mos7840_num_ports; 2320 serial->num_bulk_out = mos7840_num_ports; 2321 serial->num_ports = mos7840_num_ports; 2322 2323 return mos7840_num_ports; 2324 } 2325 2326 static int mos7840_port_probe(struct usb_serial_port *port) 2327 { 2328 struct usb_serial *serial = port->serial; 2329 struct moschip_port *mos7840_port; 2330 int status; 2331 int pnum; 2332 __u16 Data; 2333 2334 /* we set up the pointers to the endpoints in the mos7840_open * 2335 * function, as the structures aren't created yet. */ 2336 2337 pnum = port->number - serial->minor; 2338 2339 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); 2340 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2341 if (mos7840_port == NULL) { 2342 dev_err(&port->dev, "%s - Out of memory\n", __func__); 2343 return -ENOMEM; 2344 } 2345 2346 /* Initialize all port interrupt end point to port 0 int 2347 * endpoint. Our device has only one interrupt end point 2348 * common to all port */ 2349 2350 mos7840_port->port = port; 2351 mos7840_set_port_private(port, mos7840_port); 2352 spin_lock_init(&mos7840_port->pool_lock); 2353 2354 /* minor is not initialised until later by 2355 * usb-serial.c:get_free_serial() and cannot therefore be used 2356 * to index device instances */ 2357 mos7840_port->port_num = pnum + 1; 2358 dev_dbg(&port->dev, "port->number = %d\n", port->number); 2359 dev_dbg(&port->dev, "port->serial->minor = %d\n", port->serial->minor); 2360 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); 2361 dev_dbg(&port->dev, "serial->minor = %d\n", serial->minor); 2362 2363 if (mos7840_port->port_num == 1) { 2364 mos7840_port->SpRegOffset = 0x0; 2365 mos7840_port->ControlRegOffset = 0x1; 2366 mos7840_port->DcrRegOffset = 0x4; 2367 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) { 2368 mos7840_port->SpRegOffset = 0x8; 2369 mos7840_port->ControlRegOffset = 0x9; 2370 mos7840_port->DcrRegOffset = 0x16; 2371 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) { 2372 mos7840_port->SpRegOffset = 0xa; 2373 mos7840_port->ControlRegOffset = 0xb; 2374 mos7840_port->DcrRegOffset = 0x19; 2375 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) { 2376 mos7840_port->SpRegOffset = 0xa; 2377 mos7840_port->ControlRegOffset = 0xb; 2378 mos7840_port->DcrRegOffset = 0x19; 2379 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) { 2380 mos7840_port->SpRegOffset = 0xc; 2381 mos7840_port->ControlRegOffset = 0xd; 2382 mos7840_port->DcrRegOffset = 0x1c; 2383 } 2384 mos7840_dump_serial_port(port, mos7840_port); 2385 mos7840_set_port_private(port, mos7840_port); 2386 2387 /* enable rx_disable bit in control register */ 2388 status = mos7840_get_reg_sync(port, 2389 mos7840_port->ControlRegOffset, &Data); 2390 if (status < 0) { 2391 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); 2392 goto out; 2393 } else 2394 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); 2395 Data |= 0x08; /* setting driver done bit */ 2396 Data |= 0x04; /* sp1_bit to have cts change reflect in 2397 modem status reg */ 2398 2399 /* Data |= 0x20; //rx_disable bit */ 2400 status = mos7840_set_reg_sync(port, 2401 mos7840_port->ControlRegOffset, Data); 2402 if (status < 0) { 2403 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2404 goto out; 2405 } else 2406 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); 2407 2408 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2409 and 0x24 in DCR3 */ 2410 Data = 0x01; 2411 status = mos7840_set_reg_sync(port, 2412 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2413 if (status < 0) { 2414 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); 2415 goto out; 2416 } else 2417 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); 2418 2419 Data = 0x05; 2420 status = mos7840_set_reg_sync(port, 2421 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2422 if (status < 0) { 2423 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); 2424 goto out; 2425 } else 2426 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); 2427 2428 Data = 0x24; 2429 status = mos7840_set_reg_sync(port, 2430 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2431 if (status < 0) { 2432 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); 2433 goto out; 2434 } else 2435 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); 2436 2437 /* write values in clkstart0x0 and clkmulti 0x20 */ 2438 Data = 0x0; 2439 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); 2440 if (status < 0) { 2441 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2442 goto out; 2443 } else 2444 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2445 2446 Data = 0x20; 2447 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); 2448 if (status < 0) { 2449 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); 2450 goto error; 2451 } else 2452 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); 2453 2454 /* write value 0x0 to scratchpad register */ 2455 Data = 0x00; 2456 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); 2457 if (status < 0) { 2458 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); 2459 goto out; 2460 } else 2461 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); 2462 2463 /* Zero Length flag register */ 2464 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { 2465 Data = 0xff; 2466 status = mos7840_set_reg_sync(port, 2467 (__u16) (ZLP_REG1 + 2468 ((__u16)mos7840_port->port_num)), Data); 2469 dev_dbg(&port->dev, "ZLIP offset %x\n", 2470 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); 2471 if (status < 0) { 2472 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); 2473 goto out; 2474 } else 2475 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); 2476 } else { 2477 Data = 0xff; 2478 status = mos7840_set_reg_sync(port, 2479 (__u16) (ZLP_REG1 + 2480 ((__u16)mos7840_port->port_num) - 0x1), Data); 2481 dev_dbg(&port->dev, "ZLIP offset %x\n", 2482 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); 2483 if (status < 0) { 2484 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); 2485 goto out; 2486 } else 2487 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); 2488 2489 } 2490 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2491 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2492 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2493 GFP_KERNEL); 2494 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2495 !mos7840_port->dr) { 2496 status = -ENOMEM; 2497 goto error; 2498 } 2499 2500 mos7840_port->has_led = false; 2501 2502 /* Initialize LED timers */ 2503 if (device_type == MOSCHIP_DEVICE_ID_7810) { 2504 mos7840_port->has_led = true; 2505 2506 init_timer(&mos7840_port->led_timer1); 2507 mos7840_port->led_timer1.function = mos7840_led_off; 2508 mos7840_port->led_timer1.expires = 2509 jiffies + msecs_to_jiffies(LED_ON_MS); 2510 mos7840_port->led_timer1.data = (unsigned long)mos7840_port; 2511 2512 init_timer(&mos7840_port->led_timer2); 2513 mos7840_port->led_timer2.function = mos7840_led_flag_off; 2514 mos7840_port->led_timer2.expires = 2515 jiffies + msecs_to_jiffies(LED_OFF_MS); 2516 mos7840_port->led_timer2.data = (unsigned long)mos7840_port; 2517 2518 mos7840_port->led_flag = false; 2519 2520 /* Turn off LED */ 2521 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2522 } 2523 out: 2524 if (pnum == serial->num_ports - 1) { 2525 /* Zero Length flag enable */ 2526 Data = 0x0f; 2527 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2528 if (status < 0) { 2529 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status); 2530 goto error; 2531 } else 2532 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status); 2533 2534 /* setting configuration feature to one */ 2535 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2536 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 2537 MOS_WDR_TIMEOUT); 2538 } 2539 return 0; 2540 error: 2541 kfree(mos7840_port->dr); 2542 kfree(mos7840_port->ctrl_buf); 2543 usb_free_urb(mos7840_port->control_urb); 2544 kfree(mos7840_port); 2545 2546 return status; 2547 } 2548 2549 static int mos7840_port_remove(struct usb_serial_port *port) 2550 { 2551 struct moschip_port *mos7840_port; 2552 2553 mos7840_port = mos7840_get_port_private(port); 2554 2555 if (mos7840_port->has_led) { 2556 /* Turn off LED */ 2557 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2558 2559 del_timer_sync(&mos7840_port->led_timer1); 2560 del_timer_sync(&mos7840_port->led_timer2); 2561 } 2562 usb_kill_urb(mos7840_port->control_urb); 2563 usb_free_urb(mos7840_port->control_urb); 2564 kfree(mos7840_port->ctrl_buf); 2565 kfree(mos7840_port->dr); 2566 kfree(mos7840_port); 2567 2568 return 0; 2569 } 2570 2571 static struct usb_serial_driver moschip7840_4port_device = { 2572 .driver = { 2573 .owner = THIS_MODULE, 2574 .name = "mos7840", 2575 }, 2576 .description = DRIVER_DESC, 2577 .id_table = id_table, 2578 .num_ports = 4, 2579 .open = mos7840_open, 2580 .close = mos7840_close, 2581 .write = mos7840_write, 2582 .write_room = mos7840_write_room, 2583 .chars_in_buffer = mos7840_chars_in_buffer, 2584 .throttle = mos7840_throttle, 2585 .unthrottle = mos7840_unthrottle, 2586 .calc_num_ports = mos7840_calc_num_ports, 2587 #ifdef MCSSerialProbe 2588 .probe = mos7840_serial_probe, 2589 #endif 2590 .ioctl = mos7840_ioctl, 2591 .set_termios = mos7840_set_termios, 2592 .break_ctl = mos7840_break, 2593 .tiocmget = mos7840_tiocmget, 2594 .tiocmset = mos7840_tiocmset, 2595 .get_icount = mos7840_get_icount, 2596 .port_probe = mos7840_port_probe, 2597 .port_remove = mos7840_port_remove, 2598 .read_bulk_callback = mos7840_bulk_in_callback, 2599 .read_int_callback = mos7840_interrupt_callback, 2600 }; 2601 2602 static struct usb_serial_driver * const serial_drivers[] = { 2603 &moschip7840_4port_device, NULL 2604 }; 2605 2606 module_usb_serial_driver(serial_drivers, id_table); 2607 2608 MODULE_DESCRIPTION(DRIVER_DESC); 2609 MODULE_LICENSE("GPL"); 2610