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