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