1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * This program is free software; you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License as published by 5 * the Free Software Foundation; either version 2 of the License, or 6 * (at your option) any later version. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program; if not, write to the Free Software 15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 16 * 17 * Clean ups from Moschip version and a few ioctl implementations by: 18 * Paul B Schroeder <pschroeder "at" uplogix "dot" com> 19 * 20 * Originally based on drivers/usb/serial/io_edgeport.c which is: 21 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 22 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 23 * 24 */ 25 26 #include <linux/kernel.h> 27 #include <linux/errno.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 enum mos7840_flag { 187 MOS7840_FLAG_CTRL_BUSY, 188 MOS7840_FLAG_LED_BUSY, 189 }; 190 191 static const struct usb_device_id id_table[] = { 192 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 193 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 194 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)}, 195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, 196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, 197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, 198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, 199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, 200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, 201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, 202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, 203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, 205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, 207 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, 208 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 209 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 210 {} /* terminating entry */ 211 }; 212 MODULE_DEVICE_TABLE(usb, id_table); 213 214 /* This structure holds all of the local port information */ 215 216 struct moschip_port { 217 int port_num; /*Actual port number in the device(1,2,etc) */ 218 struct urb *read_urb; /* read URB for this port */ 219 __u8 shadowLCR; /* last LCR value received */ 220 __u8 shadowMCR; /* last MCR value received */ 221 char open; 222 char open_ports; 223 struct usb_serial_port *port; /* loop back to the owner of this object */ 224 225 /* Offsets */ 226 __u8 SpRegOffset; 227 __u8 ControlRegOffset; 228 __u8 DcrRegOffset; 229 /* for processing control URBS in interrupt context */ 230 struct urb *control_urb; 231 struct usb_ctrlrequest *dr; 232 char *ctrl_buf; 233 int MsrLsr; 234 235 spinlock_t pool_lock; 236 struct urb *write_urb_pool[NUM_URBS]; 237 char busy[NUM_URBS]; 238 bool read_urb_busy; 239 240 /* For device(s) with LED indicator */ 241 bool has_led; 242 struct timer_list led_timer1; /* Timer for LED on */ 243 struct timer_list led_timer2; /* Timer for LED off */ 244 struct urb *led_urb; 245 struct usb_ctrlrequest *led_dr; 246 247 unsigned long flags; 248 }; 249 250 /* 251 * mos7840_set_reg_sync 252 * To set the Control register by calling usb_fill_control_urb function 253 * by passing usb_sndctrlpipe function as parameter. 254 */ 255 256 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 257 __u16 val) 258 { 259 struct usb_device *dev = port->serial->dev; 260 val = val & 0x00ff; 261 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val); 262 263 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 264 MCS_WR_RTYPE, val, reg, NULL, 0, 265 MOS_WDR_TIMEOUT); 266 } 267 268 /* 269 * mos7840_get_reg_sync 270 * To set the Uart register by calling usb_fill_control_urb function by 271 * passing usb_rcvctrlpipe function as parameter. 272 */ 273 274 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 275 __u16 *val) 276 { 277 struct usb_device *dev = port->serial->dev; 278 int ret = 0; 279 u8 *buf; 280 281 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 282 if (!buf) 283 return -ENOMEM; 284 285 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 286 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, 287 MOS_WDR_TIMEOUT); 288 if (ret < VENDOR_READ_LENGTH) { 289 if (ret >= 0) 290 ret = -EIO; 291 goto out; 292 } 293 294 *val = buf[0]; 295 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val); 296 out: 297 kfree(buf); 298 return ret; 299 } 300 301 /* 302 * mos7840_set_uart_reg 303 * To set the Uart register by calling usb_fill_control_urb function by 304 * passing usb_sndctrlpipe function as parameter. 305 */ 306 307 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 308 __u16 val) 309 { 310 311 struct usb_device *dev = port->serial->dev; 312 val = val & 0x00ff; 313 /* For the UART control registers, the application number need 314 to be Or'ed */ 315 if (port->serial->num_ports == 4) { 316 val |= ((__u16)port->port_number + 1) << 8; 317 } else { 318 if (port->port_number == 0) { 319 val |= ((__u16)port->port_number + 1) << 8; 320 } else { 321 val |= ((__u16)port->port_number + 2) << 8; 322 } 323 } 324 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val); 325 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 326 MCS_WR_RTYPE, val, reg, NULL, 0, 327 MOS_WDR_TIMEOUT); 328 329 } 330 331 /* 332 * mos7840_get_uart_reg 333 * To set the Control register by calling usb_fill_control_urb function 334 * by passing usb_rcvctrlpipe function as parameter. 335 */ 336 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 337 __u16 *val) 338 { 339 struct usb_device *dev = port->serial->dev; 340 int ret = 0; 341 __u16 Wval; 342 u8 *buf; 343 344 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 345 if (!buf) 346 return -ENOMEM; 347 348 /* Wval is same as application number */ 349 if (port->serial->num_ports == 4) { 350 Wval = ((__u16)port->port_number + 1) << 8; 351 } else { 352 if (port->port_number == 0) { 353 Wval = ((__u16)port->port_number + 1) << 8; 354 } else { 355 Wval = ((__u16)port->port_number + 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 if (ret < VENDOR_READ_LENGTH) { 363 if (ret >= 0) 364 ret = -EIO; 365 goto out; 366 } 367 *val = buf[0]; 368 out: 369 kfree(buf); 370 return ret; 371 } 372 373 static void mos7840_dump_serial_port(struct usb_serial_port *port, 374 struct moschip_port *mos7840_port) 375 { 376 377 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 378 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset); 379 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset); 380 381 } 382 383 /************************************************************************/ 384 /************************************************************************/ 385 /* I N T E R F A C E F U N C T I O N S */ 386 /* I N T E R F A C E F U N C T I O N S */ 387 /************************************************************************/ 388 /************************************************************************/ 389 390 static inline void mos7840_set_port_private(struct usb_serial_port *port, 391 struct moschip_port *data) 392 { 393 usb_set_serial_port_data(port, (void *)data); 394 } 395 396 static inline struct moschip_port *mos7840_get_port_private(struct 397 usb_serial_port 398 *port) 399 { 400 return (struct moschip_port *)usb_get_serial_port_data(port); 401 } 402 403 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 404 { 405 struct moschip_port *mos7840_port; 406 struct async_icount *icount; 407 mos7840_port = port; 408 if (new_msr & 409 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 410 MOS_MSR_DELTA_CD)) { 411 icount = &mos7840_port->port->icount; 412 413 /* update input line counters */ 414 if (new_msr & MOS_MSR_DELTA_CTS) 415 icount->cts++; 416 if (new_msr & MOS_MSR_DELTA_DSR) 417 icount->dsr++; 418 if (new_msr & MOS_MSR_DELTA_CD) 419 icount->dcd++; 420 if (new_msr & MOS_MSR_DELTA_RI) 421 icount->rng++; 422 423 wake_up_interruptible(&port->port->port.delta_msr_wait); 424 } 425 } 426 427 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 428 { 429 struct async_icount *icount; 430 431 if (new_lsr & SERIAL_LSR_BI) { 432 /* 433 * Parity and Framing errors only count if they 434 * occur exclusive of a break being 435 * received. 436 */ 437 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 438 } 439 440 /* update input line counters */ 441 icount = &port->port->icount; 442 if (new_lsr & SERIAL_LSR_BI) 443 icount->brk++; 444 if (new_lsr & SERIAL_LSR_OE) 445 icount->overrun++; 446 if (new_lsr & SERIAL_LSR_PE) 447 icount->parity++; 448 if (new_lsr & SERIAL_LSR_FE) 449 icount->frame++; 450 } 451 452 /************************************************************************/ 453 /************************************************************************/ 454 /* U S B C A L L B A C K F U N C T I O N S */ 455 /* U S B C A L L B A C K F U N C T I O N S */ 456 /************************************************************************/ 457 /************************************************************************/ 458 459 static void mos7840_control_callback(struct urb *urb) 460 { 461 unsigned char *data; 462 struct moschip_port *mos7840_port; 463 struct device *dev = &urb->dev->dev; 464 __u8 regval = 0x0; 465 int status = urb->status; 466 467 mos7840_port = urb->context; 468 469 switch (status) { 470 case 0: 471 /* success */ 472 break; 473 case -ECONNRESET: 474 case -ENOENT: 475 case -ESHUTDOWN: 476 /* this urb is terminated, clean up */ 477 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); 478 goto out; 479 default: 480 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); 481 goto out; 482 } 483 484 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length); 485 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__, 486 mos7840_port->MsrLsr, mos7840_port->port_num); 487 data = urb->transfer_buffer; 488 regval = (__u8) data[0]; 489 dev_dbg(dev, "%s data is %x\n", __func__, regval); 490 if (mos7840_port->MsrLsr == 0) 491 mos7840_handle_new_msr(mos7840_port, regval); 492 else if (mos7840_port->MsrLsr == 1) 493 mos7840_handle_new_lsr(mos7840_port, regval); 494 out: 495 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags); 496 } 497 498 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 499 __u16 *val) 500 { 501 struct usb_device *dev = mcs->port->serial->dev; 502 struct usb_ctrlrequest *dr = mcs->dr; 503 unsigned char *buffer = mcs->ctrl_buf; 504 int ret; 505 506 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags)) 507 return -EBUSY; 508 509 dr->bRequestType = MCS_RD_RTYPE; 510 dr->bRequest = MCS_RDREQ; 511 dr->wValue = cpu_to_le16(Wval); /* 0 */ 512 dr->wIndex = cpu_to_le16(reg); 513 dr->wLength = cpu_to_le16(2); 514 515 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 516 (unsigned char *)dr, buffer, 2, 517 mos7840_control_callback, mcs); 518 mcs->control_urb->transfer_buffer_length = 2; 519 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 520 if (ret) 521 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags); 522 523 return ret; 524 } 525 526 static void mos7840_set_led_callback(struct urb *urb) 527 { 528 switch (urb->status) { 529 case 0: 530 /* Success */ 531 break; 532 case -ECONNRESET: 533 case -ENOENT: 534 case -ESHUTDOWN: 535 /* This urb is terminated, clean up */ 536 dev_dbg(&urb->dev->dev, "%s - urb shutting down: %d\n", 537 __func__, urb->status); 538 break; 539 default: 540 dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n", 541 __func__, urb->status); 542 } 543 } 544 545 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, 546 __u16 reg) 547 { 548 struct usb_device *dev = mcs->port->serial->dev; 549 struct usb_ctrlrequest *dr = mcs->led_dr; 550 551 dr->bRequestType = MCS_WR_RTYPE; 552 dr->bRequest = MCS_WRREQ; 553 dr->wValue = cpu_to_le16(wval); 554 dr->wIndex = cpu_to_le16(reg); 555 dr->wLength = cpu_to_le16(0); 556 557 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0), 558 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL); 559 560 usb_submit_urb(mcs->led_urb, GFP_ATOMIC); 561 } 562 563 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, 564 __u16 val) 565 { 566 struct usb_device *dev = port->serial->dev; 567 568 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, 569 val, reg, NULL, 0, MOS_WDR_TIMEOUT); 570 } 571 572 static void mos7840_led_off(unsigned long arg) 573 { 574 struct moschip_port *mcs = (struct moschip_port *) arg; 575 576 /* Turn off LED */ 577 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER); 578 mod_timer(&mcs->led_timer2, 579 jiffies + msecs_to_jiffies(LED_OFF_MS)); 580 } 581 582 static void mos7840_led_flag_off(unsigned long arg) 583 { 584 struct moschip_port *mcs = (struct moschip_port *) arg; 585 586 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags); 587 } 588 589 static void mos7840_led_activity(struct usb_serial_port *port) 590 { 591 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 592 593 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags)) 594 return; 595 596 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER); 597 mod_timer(&mos7840_port->led_timer1, 598 jiffies + msecs_to_jiffies(LED_ON_MS)); 599 } 600 601 /***************************************************************************** 602 * mos7840_interrupt_callback 603 * this is the callback function for when we have received data on the 604 * interrupt endpoint. 605 *****************************************************************************/ 606 607 static void mos7840_interrupt_callback(struct urb *urb) 608 { 609 int result; 610 int length; 611 struct moschip_port *mos7840_port; 612 struct usb_serial *serial; 613 __u16 Data; 614 unsigned char *data; 615 __u8 sp[5], st; 616 int i, rv = 0; 617 __u16 wval, wreg = 0; 618 int status = urb->status; 619 620 switch (status) { 621 case 0: 622 /* success */ 623 break; 624 case -ECONNRESET: 625 case -ENOENT: 626 case -ESHUTDOWN: 627 /* this urb is terminated, clean up */ 628 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 629 __func__, status); 630 return; 631 default: 632 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", 633 __func__, status); 634 goto exit; 635 } 636 637 length = urb->actual_length; 638 data = urb->transfer_buffer; 639 640 serial = urb->context; 641 642 /* Moschip get 5 bytes 643 * Byte 1 IIR Port 1 (port.number is 0) 644 * Byte 2 IIR Port 2 (port.number is 1) 645 * Byte 3 IIR Port 3 (port.number is 2) 646 * Byte 4 IIR Port 4 (port.number is 3) 647 * Byte 5 FIFO status for both */ 648 649 if (length > 5) { 650 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n"); 651 return; 652 } 653 654 sp[0] = (__u8) data[0]; 655 sp[1] = (__u8) data[1]; 656 sp[2] = (__u8) data[2]; 657 sp[3] = (__u8) data[3]; 658 st = (__u8) data[4]; 659 660 for (i = 0; i < serial->num_ports; i++) { 661 mos7840_port = mos7840_get_port_private(serial->port[i]); 662 wval = ((__u16)serial->port[i]->port_number + 1) << 8; 663 if (mos7840_port->open) { 664 if (sp[i] & 0x01) { 665 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i); 666 } else { 667 switch (sp[i] & 0x0f) { 668 case SERIAL_IIR_RLS: 669 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i); 670 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n"); 671 mos7840_port->MsrLsr = 1; 672 wreg = LINE_STATUS_REGISTER; 673 break; 674 case SERIAL_IIR_MS: 675 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i); 676 mos7840_port->MsrLsr = 0; 677 wreg = MODEM_STATUS_REGISTER; 678 break; 679 } 680 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 681 } 682 } 683 } 684 if (!(rv < 0)) 685 /* the completion handler for the control urb will resubmit */ 686 return; 687 exit: 688 result = usb_submit_urb(urb, GFP_ATOMIC); 689 if (result) { 690 dev_err(&urb->dev->dev, 691 "%s - Error %d submitting interrupt urb\n", 692 __func__, result); 693 } 694 } 695 696 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 697 const char *function) 698 { 699 if (!port) { 700 pr_debug("%s - port == NULL\n", function); 701 return -1; 702 } 703 if (!port->serial) { 704 pr_debug("%s - port->serial == NULL\n", function); 705 return -1; 706 } 707 708 return 0; 709 } 710 711 /* Inline functions to check the sanity of a pointer that is passed to us */ 712 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 713 const char *function) 714 { 715 if (!serial) { 716 pr_debug("%s - serial == NULL\n", function); 717 return -1; 718 } 719 if (!serial->type) { 720 pr_debug("%s - serial->type == NULL!\n", function); 721 return -1; 722 } 723 724 return 0; 725 } 726 727 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 728 const char *function) 729 { 730 /* if no port was specified, or it fails a paranoia check */ 731 if (!port || 732 mos7840_port_paranoia_check(port, function) || 733 mos7840_serial_paranoia_check(port->serial, function)) { 734 /* then say that we don't have a valid usb_serial thing, 735 * which will end up genrating -ENODEV return values */ 736 return NULL; 737 } 738 739 return port->serial; 740 } 741 742 /***************************************************************************** 743 * mos7840_bulk_in_callback 744 * this is the callback function for when we have received data on the 745 * bulk in endpoint. 746 *****************************************************************************/ 747 748 static void mos7840_bulk_in_callback(struct urb *urb) 749 { 750 int retval; 751 unsigned char *data; 752 struct usb_serial *serial; 753 struct usb_serial_port *port; 754 struct moschip_port *mos7840_port; 755 int status = urb->status; 756 757 mos7840_port = urb->context; 758 if (!mos7840_port) 759 return; 760 761 if (status) { 762 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); 763 mos7840_port->read_urb_busy = false; 764 return; 765 } 766 767 port = mos7840_port->port; 768 if (mos7840_port_paranoia_check(port, __func__)) { 769 mos7840_port->read_urb_busy = false; 770 return; 771 } 772 773 serial = mos7840_get_usb_serial(port, __func__); 774 if (!serial) { 775 mos7840_port->read_urb_busy = false; 776 return; 777 } 778 779 data = urb->transfer_buffer; 780 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); 781 782 if (urb->actual_length) { 783 struct tty_port *tport = &mos7840_port->port->port; 784 tty_insert_flip_string(tport, data, urb->actual_length); 785 tty_flip_buffer_push(tport); 786 port->icount.rx += urb->actual_length; 787 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx); 788 } 789 790 if (!mos7840_port->read_urb) { 791 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n"); 792 mos7840_port->read_urb_busy = false; 793 return; 794 } 795 796 if (mos7840_port->has_led) 797 mos7840_led_activity(port); 798 799 mos7840_port->read_urb_busy = true; 800 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 801 802 if (retval) { 803 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); 804 mos7840_port->read_urb_busy = false; 805 } 806 } 807 808 /***************************************************************************** 809 * mos7840_bulk_out_data_callback 810 * this is the callback function for when we have finished sending 811 * serial data on the bulk out endpoint. 812 *****************************************************************************/ 813 814 static void mos7840_bulk_out_data_callback(struct urb *urb) 815 { 816 struct moschip_port *mos7840_port; 817 struct usb_serial_port *port; 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 if (mos7840_port->open) 841 tty_port_tty_wakeup(&port->port); 842 843 } 844 845 /************************************************************************/ 846 /* 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 */ 847 /************************************************************************/ 848 849 /***************************************************************************** 850 * mos7840_open 851 * this function is called by the tty driver when a port is opened 852 * If successful, we return 0 853 * Otherwise we return a negative error number. 854 *****************************************************************************/ 855 856 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 857 { 858 int response; 859 int j; 860 struct usb_serial *serial; 861 struct urb *urb; 862 __u16 Data; 863 int status; 864 struct moschip_port *mos7840_port; 865 struct moschip_port *port0; 866 867 if (mos7840_port_paranoia_check(port, __func__)) 868 return -ENODEV; 869 870 serial = port->serial; 871 872 if (mos7840_serial_paranoia_check(serial, __func__)) 873 return -ENODEV; 874 875 mos7840_port = mos7840_get_port_private(port); 876 port0 = mos7840_get_port_private(serial->port[0]); 877 878 if (mos7840_port == NULL || port0 == NULL) 879 return -ENODEV; 880 881 usb_clear_halt(serial->dev, port->write_urb->pipe); 882 usb_clear_halt(serial->dev, port->read_urb->pipe); 883 port0->open_ports++; 884 885 /* Initialising the write urb pool */ 886 for (j = 0; j < NUM_URBS; ++j) { 887 urb = usb_alloc_urb(0, GFP_KERNEL); 888 mos7840_port->write_urb_pool[j] = urb; 889 if (!urb) 890 continue; 891 892 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 893 GFP_KERNEL); 894 if (!urb->transfer_buffer) { 895 usb_free_urb(urb); 896 mos7840_port->write_urb_pool[j] = NULL; 897 continue; 898 } 899 } 900 901 /***************************************************************************** 902 * Initialize MCS7840 -- Write Init values to corresponding Registers 903 * 904 * Register Index 905 * 1 : IER 906 * 2 : FCR 907 * 3 : LCR 908 * 4 : MCR 909 * 910 * 0x08 : SP1/2 Control Reg 911 *****************************************************************************/ 912 913 /* NEED to check the following Block */ 914 915 Data = 0x0; 916 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 917 if (status < 0) { 918 dev_dbg(&port->dev, "Reading Spreg failed\n"); 919 goto err; 920 } 921 Data |= 0x80; 922 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 923 if (status < 0) { 924 dev_dbg(&port->dev, "writing Spreg failed\n"); 925 goto err; 926 } 927 928 Data &= ~0x80; 929 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 930 if (status < 0) { 931 dev_dbg(&port->dev, "writing Spreg failed\n"); 932 goto err; 933 } 934 /* End of block to be checked */ 935 936 Data = 0x0; 937 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 938 &Data); 939 if (status < 0) { 940 dev_dbg(&port->dev, "Reading Controlreg failed\n"); 941 goto err; 942 } 943 Data |= 0x08; /* Driver done bit */ 944 Data |= 0x20; /* rx_disable */ 945 status = mos7840_set_reg_sync(port, 946 mos7840_port->ControlRegOffset, Data); 947 if (status < 0) { 948 dev_dbg(&port->dev, "writing Controlreg failed\n"); 949 goto err; 950 } 951 /* do register settings here */ 952 /* Set all regs to the device default values. */ 953 /*********************************** 954 * First Disable all interrupts. 955 ***********************************/ 956 Data = 0x00; 957 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 958 if (status < 0) { 959 dev_dbg(&port->dev, "disabling interrupts failed\n"); 960 goto err; 961 } 962 /* Set FIFO_CONTROL_REGISTER to the default value */ 963 Data = 0x00; 964 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 965 if (status < 0) { 966 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 967 goto err; 968 } 969 970 Data = 0xcf; 971 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 972 if (status < 0) { 973 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 974 goto err; 975 } 976 977 Data = 0x03; 978 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 979 mos7840_port->shadowLCR = Data; 980 981 Data = 0x0b; 982 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 983 mos7840_port->shadowMCR = Data; 984 985 Data = 0x00; 986 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 987 mos7840_port->shadowLCR = Data; 988 989 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 990 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 991 992 Data = 0x0c; 993 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 994 995 Data = 0x0; 996 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 997 998 Data = 0x00; 999 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 1000 1001 Data = Data & ~SERIAL_LCR_DLAB; 1002 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1003 mos7840_port->shadowLCR = Data; 1004 1005 /* clearing Bulkin and Bulkout Fifo */ 1006 Data = 0x0; 1007 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 1008 1009 Data = Data | 0x0c; 1010 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1011 1012 Data = Data & ~0x0c; 1013 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1014 /* Finally enable all interrupts */ 1015 Data = 0x0c; 1016 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1017 1018 /* clearing rx_disable */ 1019 Data = 0x0; 1020 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1021 &Data); 1022 Data = Data & ~0x20; 1023 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1024 Data); 1025 1026 /* rx_negate */ 1027 Data = 0x0; 1028 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1029 &Data); 1030 Data = Data | 0x10; 1031 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1032 Data); 1033 1034 /* Check to see if we've set up our endpoint info yet * 1035 * (can't set it up in mos7840_startup as the structures * 1036 * were not set up at that time.) */ 1037 if (port0->open_ports == 1) { 1038 /* FIXME: Buffer never NULL, so URB is not submitted. */ 1039 if (serial->port[0]->interrupt_in_buffer == NULL) { 1040 /* set up interrupt urb */ 1041 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1042 serial->dev, 1043 usb_rcvintpipe(serial->dev, 1044 serial->port[0]->interrupt_in_endpointAddress), 1045 serial->port[0]->interrupt_in_buffer, 1046 serial->port[0]->interrupt_in_urb-> 1047 transfer_buffer_length, 1048 mos7840_interrupt_callback, 1049 serial, 1050 serial->port[0]->interrupt_in_urb->interval); 1051 1052 /* start interrupt read for mos7840 */ 1053 response = 1054 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1055 GFP_KERNEL); 1056 if (response) { 1057 dev_err(&port->dev, "%s - Error %d submitting " 1058 "interrupt urb\n", __func__, response); 1059 } 1060 1061 } 1062 1063 } 1064 1065 /* see if we've set up our endpoint info yet * 1066 * (can't set it up in mos7840_startup as the * 1067 * structures were not set up at that time.) */ 1068 1069 dev_dbg(&port->dev, "port number is %d\n", port->port_number); 1070 dev_dbg(&port->dev, "minor number is %d\n", port->minor); 1071 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress); 1072 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress); 1073 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress); 1074 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num); 1075 mos7840_port->read_urb = port->read_urb; 1076 1077 /* set up our bulk in urb */ 1078 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1079 usb_fill_bulk_urb(mos7840_port->read_urb, 1080 serial->dev, 1081 usb_rcvbulkpipe(serial->dev, 1082 (port->bulk_in_endpointAddress) + 2), 1083 port->bulk_in_buffer, 1084 mos7840_port->read_urb->transfer_buffer_length, 1085 mos7840_bulk_in_callback, mos7840_port); 1086 } else { 1087 usb_fill_bulk_urb(mos7840_port->read_urb, 1088 serial->dev, 1089 usb_rcvbulkpipe(serial->dev, 1090 port->bulk_in_endpointAddress), 1091 port->bulk_in_buffer, 1092 mos7840_port->read_urb->transfer_buffer_length, 1093 mos7840_bulk_in_callback, mos7840_port); 1094 } 1095 1096 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress); 1097 mos7840_port->read_urb_busy = true; 1098 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1099 if (response) { 1100 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1101 __func__, response); 1102 mos7840_port->read_urb_busy = false; 1103 } 1104 1105 /* initialize our port settings */ 1106 /* Must set to enable ints! */ 1107 mos7840_port->shadowMCR = MCR_MASTER_IE; 1108 /* send a open port command */ 1109 mos7840_port->open = 1; 1110 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1111 1112 return 0; 1113 err: 1114 for (j = 0; j < NUM_URBS; ++j) { 1115 urb = mos7840_port->write_urb_pool[j]; 1116 if (!urb) 1117 continue; 1118 kfree(urb->transfer_buffer); 1119 usb_free_urb(urb); 1120 } 1121 return status; 1122 } 1123 1124 /***************************************************************************** 1125 * mos7840_chars_in_buffer 1126 * this function is called by the tty driver when it wants to know how many 1127 * bytes of data we currently have outstanding in the port (data that has 1128 * been written, but hasn't made it out the port yet) 1129 * If successful, we return the number of bytes left to be written in the 1130 * system, 1131 * Otherwise we return zero. 1132 *****************************************************************************/ 1133 1134 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1135 { 1136 struct usb_serial_port *port = tty->driver_data; 1137 int i; 1138 int chars = 0; 1139 unsigned long flags; 1140 struct moschip_port *mos7840_port; 1141 1142 if (mos7840_port_paranoia_check(port, __func__)) 1143 return 0; 1144 1145 mos7840_port = mos7840_get_port_private(port); 1146 if (mos7840_port == NULL) 1147 return 0; 1148 1149 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1150 for (i = 0; i < NUM_URBS; ++i) { 1151 if (mos7840_port->busy[i]) { 1152 struct urb *urb = mos7840_port->write_urb_pool[i]; 1153 chars += urb->transfer_buffer_length; 1154 } 1155 } 1156 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1157 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 1158 return chars; 1159 1160 } 1161 1162 /***************************************************************************** 1163 * mos7840_close 1164 * this function is called by the tty driver when a port is closed 1165 *****************************************************************************/ 1166 1167 static void mos7840_close(struct usb_serial_port *port) 1168 { 1169 struct usb_serial *serial; 1170 struct moschip_port *mos7840_port; 1171 struct moschip_port *port0; 1172 int j; 1173 __u16 Data; 1174 1175 if (mos7840_port_paranoia_check(port, __func__)) 1176 return; 1177 1178 serial = mos7840_get_usb_serial(port, __func__); 1179 if (!serial) 1180 return; 1181 1182 mos7840_port = mos7840_get_port_private(port); 1183 port0 = mos7840_get_port_private(serial->port[0]); 1184 1185 if (mos7840_port == NULL || port0 == NULL) 1186 return; 1187 1188 for (j = 0; j < NUM_URBS; ++j) 1189 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1190 1191 /* Freeing Write URBs */ 1192 for (j = 0; j < NUM_URBS; ++j) { 1193 if (mos7840_port->write_urb_pool[j]) { 1194 kfree(mos7840_port->write_urb_pool[j]->transfer_buffer); 1195 usb_free_urb(mos7840_port->write_urb_pool[j]); 1196 } 1197 } 1198 1199 usb_kill_urb(mos7840_port->read_urb); 1200 mos7840_port->read_urb_busy = false; 1201 1202 port0->open_ports--; 1203 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports); 1204 if (port0->open_ports == 0) { 1205 if (serial->port[0]->interrupt_in_urb) { 1206 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n"); 1207 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1208 } 1209 } 1210 1211 Data = 0x0; 1212 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1213 1214 Data = 0x00; 1215 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1216 1217 mos7840_port->open = 0; 1218 } 1219 1220 /***************************************************************************** 1221 * mos7840_break 1222 * this function sends a break to the port 1223 *****************************************************************************/ 1224 static void mos7840_break(struct tty_struct *tty, int break_state) 1225 { 1226 struct usb_serial_port *port = tty->driver_data; 1227 unsigned char data; 1228 struct usb_serial *serial; 1229 struct moschip_port *mos7840_port; 1230 1231 if (mos7840_port_paranoia_check(port, __func__)) 1232 return; 1233 1234 serial = mos7840_get_usb_serial(port, __func__); 1235 if (!serial) 1236 return; 1237 1238 mos7840_port = mos7840_get_port_private(port); 1239 1240 if (mos7840_port == NULL) 1241 return; 1242 1243 if (break_state == -1) 1244 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1245 else 1246 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1247 1248 /* FIXME: no locking on shadowLCR anywhere in driver */ 1249 mos7840_port->shadowLCR = data; 1250 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1251 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1252 mos7840_port->shadowLCR); 1253 } 1254 1255 /***************************************************************************** 1256 * mos7840_write_room 1257 * this function is called by the tty driver when it wants to know how many 1258 * bytes of data we can accept for a specific port. 1259 * If successful, we return the amount of room that we have for this port 1260 * Otherwise we return a negative error number. 1261 *****************************************************************************/ 1262 1263 static int mos7840_write_room(struct tty_struct *tty) 1264 { 1265 struct usb_serial_port *port = tty->driver_data; 1266 int i; 1267 int room = 0; 1268 unsigned long flags; 1269 struct moschip_port *mos7840_port; 1270 1271 if (mos7840_port_paranoia_check(port, __func__)) 1272 return -1; 1273 1274 mos7840_port = mos7840_get_port_private(port); 1275 if (mos7840_port == NULL) 1276 return -1; 1277 1278 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1279 for (i = 0; i < NUM_URBS; ++i) { 1280 if (!mos7840_port->busy[i]) 1281 room += URB_TRANSFER_BUFFER_SIZE; 1282 } 1283 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1284 1285 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1286 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); 1287 return room; 1288 1289 } 1290 1291 /***************************************************************************** 1292 * mos7840_write 1293 * this function is called by the tty driver when data should be written to 1294 * the port. 1295 * If successful, we return the number of bytes written, otherwise we 1296 * return a negative error number. 1297 *****************************************************************************/ 1298 1299 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1300 const unsigned char *data, int count) 1301 { 1302 int status; 1303 int i; 1304 int bytes_sent = 0; 1305 int transfer_size; 1306 unsigned long flags; 1307 1308 struct moschip_port *mos7840_port; 1309 struct usb_serial *serial; 1310 struct urb *urb; 1311 /* __u16 Data; */ 1312 const unsigned char *current_position = data; 1313 unsigned char *data1; 1314 1315 if (mos7840_port_paranoia_check(port, __func__)) 1316 return -1; 1317 1318 serial = port->serial; 1319 if (mos7840_serial_paranoia_check(serial, __func__)) 1320 return -1; 1321 1322 mos7840_port = mos7840_get_port_private(port); 1323 if (mos7840_port == NULL) 1324 return -1; 1325 1326 /* try to find a free urb in the list */ 1327 urb = NULL; 1328 1329 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1330 for (i = 0; i < NUM_URBS; ++i) { 1331 if (!mos7840_port->busy[i]) { 1332 mos7840_port->busy[i] = 1; 1333 urb = mos7840_port->write_urb_pool[i]; 1334 dev_dbg(&port->dev, "URB:%d\n", i); 1335 break; 1336 } 1337 } 1338 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1339 1340 if (urb == NULL) { 1341 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); 1342 goto exit; 1343 } 1344 1345 if (urb->transfer_buffer == NULL) { 1346 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 1347 GFP_ATOMIC); 1348 if (!urb->transfer_buffer) 1349 goto exit; 1350 } 1351 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1352 1353 memcpy(urb->transfer_buffer, current_position, transfer_size); 1354 1355 /* fill urb with data and submit */ 1356 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1357 usb_fill_bulk_urb(urb, 1358 serial->dev, 1359 usb_sndbulkpipe(serial->dev, 1360 (port->bulk_out_endpointAddress) + 2), 1361 urb->transfer_buffer, 1362 transfer_size, 1363 mos7840_bulk_out_data_callback, mos7840_port); 1364 } else { 1365 usb_fill_bulk_urb(urb, 1366 serial->dev, 1367 usb_sndbulkpipe(serial->dev, 1368 port->bulk_out_endpointAddress), 1369 urb->transfer_buffer, 1370 transfer_size, 1371 mos7840_bulk_out_data_callback, mos7840_port); 1372 } 1373 1374 data1 = urb->transfer_buffer; 1375 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); 1376 1377 if (mos7840_port->has_led) 1378 mos7840_led_activity(port); 1379 1380 /* send it down the pipe */ 1381 status = usb_submit_urb(urb, GFP_ATOMIC); 1382 1383 if (status) { 1384 mos7840_port->busy[i] = 0; 1385 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 1386 "with status = %d\n", __func__, status); 1387 bytes_sent = status; 1388 goto exit; 1389 } 1390 bytes_sent = transfer_size; 1391 port->icount.tx += transfer_size; 1392 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx); 1393 exit: 1394 return bytes_sent; 1395 1396 } 1397 1398 /***************************************************************************** 1399 * mos7840_throttle 1400 * this function is called by the tty driver when it wants to stop the data 1401 * being read from the port. 1402 *****************************************************************************/ 1403 1404 static void mos7840_throttle(struct tty_struct *tty) 1405 { 1406 struct usb_serial_port *port = tty->driver_data; 1407 struct moschip_port *mos7840_port; 1408 int status; 1409 1410 if (mos7840_port_paranoia_check(port, __func__)) 1411 return; 1412 1413 mos7840_port = mos7840_get_port_private(port); 1414 1415 if (mos7840_port == NULL) 1416 return; 1417 1418 if (!mos7840_port->open) { 1419 dev_dbg(&port->dev, "%s", "port not opened\n"); 1420 return; 1421 } 1422 1423 /* if we are implementing XON/XOFF, send the stop character */ 1424 if (I_IXOFF(tty)) { 1425 unsigned char stop_char = STOP_CHAR(tty); 1426 status = mos7840_write(tty, port, &stop_char, 1); 1427 if (status <= 0) 1428 return; 1429 } 1430 /* if we are implementing RTS/CTS, toggle that line */ 1431 if (C_CRTSCTS(tty)) { 1432 mos7840_port->shadowMCR &= ~MCR_RTS; 1433 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1434 mos7840_port->shadowMCR); 1435 if (status < 0) 1436 return; 1437 } 1438 } 1439 1440 /***************************************************************************** 1441 * mos7840_unthrottle 1442 * this function is called by the tty driver when it wants to resume 1443 * the data being read from the port (called after mos7840_throttle is 1444 * called) 1445 *****************************************************************************/ 1446 static void mos7840_unthrottle(struct tty_struct *tty) 1447 { 1448 struct usb_serial_port *port = tty->driver_data; 1449 int status; 1450 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1451 1452 if (mos7840_port_paranoia_check(port, __func__)) 1453 return; 1454 1455 if (mos7840_port == NULL) 1456 return; 1457 1458 if (!mos7840_port->open) { 1459 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1460 return; 1461 } 1462 1463 /* if we are implementing XON/XOFF, send the start character */ 1464 if (I_IXOFF(tty)) { 1465 unsigned char start_char = START_CHAR(tty); 1466 status = mos7840_write(tty, port, &start_char, 1); 1467 if (status <= 0) 1468 return; 1469 } 1470 1471 /* if we are implementing RTS/CTS, toggle that line */ 1472 if (C_CRTSCTS(tty)) { 1473 mos7840_port->shadowMCR |= MCR_RTS; 1474 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1475 mos7840_port->shadowMCR); 1476 if (status < 0) 1477 return; 1478 } 1479 } 1480 1481 static int mos7840_tiocmget(struct tty_struct *tty) 1482 { 1483 struct usb_serial_port *port = tty->driver_data; 1484 struct moschip_port *mos7840_port; 1485 unsigned int result; 1486 __u16 msr; 1487 __u16 mcr; 1488 int status; 1489 mos7840_port = mos7840_get_port_private(port); 1490 1491 if (mos7840_port == NULL) 1492 return -ENODEV; 1493 1494 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1495 if (status < 0) 1496 return -EIO; 1497 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1498 if (status < 0) 1499 return -EIO; 1500 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1501 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1502 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1503 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1504 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1505 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1506 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1507 1508 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 1509 1510 return result; 1511 } 1512 1513 static int mos7840_tiocmset(struct tty_struct *tty, 1514 unsigned int set, unsigned int clear) 1515 { 1516 struct usb_serial_port *port = tty->driver_data; 1517 struct moschip_port *mos7840_port; 1518 unsigned int mcr; 1519 int status; 1520 1521 mos7840_port = mos7840_get_port_private(port); 1522 1523 if (mos7840_port == NULL) 1524 return -ENODEV; 1525 1526 /* FIXME: What locks the port registers ? */ 1527 mcr = mos7840_port->shadowMCR; 1528 if (clear & TIOCM_RTS) 1529 mcr &= ~MCR_RTS; 1530 if (clear & TIOCM_DTR) 1531 mcr &= ~MCR_DTR; 1532 if (clear & TIOCM_LOOP) 1533 mcr &= ~MCR_LOOPBACK; 1534 1535 if (set & TIOCM_RTS) 1536 mcr |= MCR_RTS; 1537 if (set & TIOCM_DTR) 1538 mcr |= MCR_DTR; 1539 if (set & TIOCM_LOOP) 1540 mcr |= MCR_LOOPBACK; 1541 1542 mos7840_port->shadowMCR = mcr; 1543 1544 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1545 if (status < 0) { 1546 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); 1547 return status; 1548 } 1549 1550 return 0; 1551 } 1552 1553 /***************************************************************************** 1554 * mos7840_calc_baud_rate_divisor 1555 * this function calculates the proper baud rate divisor for the specified 1556 * baud rate. 1557 *****************************************************************************/ 1558 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, 1559 int baudRate, int *divisor, 1560 __u16 *clk_sel_val) 1561 { 1562 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); 1563 1564 if (baudRate <= 115200) { 1565 *divisor = 115200 / baudRate; 1566 *clk_sel_val = 0x0; 1567 } 1568 if ((baudRate > 115200) && (baudRate <= 230400)) { 1569 *divisor = 230400 / baudRate; 1570 *clk_sel_val = 0x10; 1571 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1572 *divisor = 403200 / baudRate; 1573 *clk_sel_val = 0x20; 1574 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1575 *divisor = 460800 / baudRate; 1576 *clk_sel_val = 0x30; 1577 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1578 *divisor = 806400 / baudRate; 1579 *clk_sel_val = 0x40; 1580 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1581 *divisor = 921600 / baudRate; 1582 *clk_sel_val = 0x50; 1583 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1584 *divisor = 1572864 / baudRate; 1585 *clk_sel_val = 0x60; 1586 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1587 *divisor = 3145728 / baudRate; 1588 *clk_sel_val = 0x70; 1589 } 1590 return 0; 1591 } 1592 1593 /***************************************************************************** 1594 * mos7840_send_cmd_write_baud_rate 1595 * this function sends the proper command to change the baud rate of the 1596 * specified port. 1597 *****************************************************************************/ 1598 1599 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1600 int baudRate) 1601 { 1602 int divisor = 0; 1603 int status; 1604 __u16 Data; 1605 unsigned char number; 1606 __u16 clk_sel_val; 1607 struct usb_serial_port *port; 1608 1609 if (mos7840_port == NULL) 1610 return -1; 1611 1612 port = mos7840_port->port; 1613 if (mos7840_port_paranoia_check(port, __func__)) 1614 return -1; 1615 1616 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1617 return -1; 1618 1619 number = mos7840_port->port->port_number; 1620 1621 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate); 1622 /* reset clk_uart_sel in spregOffset */ 1623 if (baudRate > 115200) { 1624 #ifdef HW_flow_control 1625 /* NOTE: need to see the pther register to modify */ 1626 /* setting h/w flow control bit to 1 */ 1627 Data = 0x2b; 1628 mos7840_port->shadowMCR = Data; 1629 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1630 Data); 1631 if (status < 0) { 1632 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1633 return -1; 1634 } 1635 #endif 1636 1637 } else { 1638 #ifdef HW_flow_control 1639 /* setting h/w flow control bit to 0 */ 1640 Data = 0xb; 1641 mos7840_port->shadowMCR = Data; 1642 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1643 Data); 1644 if (status < 0) { 1645 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1646 return -1; 1647 } 1648 #endif 1649 1650 } 1651 1652 if (1) { /* baudRate <= 115200) */ 1653 clk_sel_val = 0x0; 1654 Data = 0x0; 1655 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, 1656 &clk_sel_val); 1657 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1658 &Data); 1659 if (status < 0) { 1660 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); 1661 return -1; 1662 } 1663 Data = (Data & 0x8f) | clk_sel_val; 1664 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1665 Data); 1666 if (status < 0) { 1667 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1668 return -1; 1669 } 1670 /* Calculate the Divisor */ 1671 1672 if (status) { 1673 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1674 return status; 1675 } 1676 /* Enable access to divisor latch */ 1677 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1678 mos7840_port->shadowLCR = Data; 1679 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1680 1681 /* Write the divisor */ 1682 Data = (unsigned char)(divisor & 0xff); 1683 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); 1684 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1685 1686 Data = (unsigned char)((divisor & 0xff00) >> 8); 1687 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); 1688 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1689 1690 /* Disable access to divisor latch */ 1691 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1692 mos7840_port->shadowLCR = Data; 1693 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1694 1695 } 1696 return status; 1697 } 1698 1699 /***************************************************************************** 1700 * mos7840_change_port_settings 1701 * This routine is called to set the UART on the device to match 1702 * the specified new settings. 1703 *****************************************************************************/ 1704 1705 static void mos7840_change_port_settings(struct tty_struct *tty, 1706 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1707 { 1708 int baud; 1709 unsigned cflag; 1710 unsigned iflag; 1711 __u8 lData; 1712 __u8 lParity; 1713 __u8 lStop; 1714 int status; 1715 __u16 Data; 1716 struct usb_serial_port *port; 1717 struct usb_serial *serial; 1718 1719 if (mos7840_port == NULL) 1720 return; 1721 1722 port = mos7840_port->port; 1723 1724 if (mos7840_port_paranoia_check(port, __func__)) 1725 return; 1726 1727 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1728 return; 1729 1730 serial = port->serial; 1731 1732 if (!mos7840_port->open) { 1733 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1734 return; 1735 } 1736 1737 lData = LCR_BITS_8; 1738 lStop = LCR_STOP_1; 1739 lParity = LCR_PAR_NONE; 1740 1741 cflag = tty->termios.c_cflag; 1742 iflag = tty->termios.c_iflag; 1743 1744 /* Change the number of bits */ 1745 switch (cflag & CSIZE) { 1746 case CS5: 1747 lData = LCR_BITS_5; 1748 break; 1749 1750 case CS6: 1751 lData = LCR_BITS_6; 1752 break; 1753 1754 case CS7: 1755 lData = LCR_BITS_7; 1756 break; 1757 1758 default: 1759 case CS8: 1760 lData = LCR_BITS_8; 1761 break; 1762 } 1763 1764 /* Change the Parity bit */ 1765 if (cflag & PARENB) { 1766 if (cflag & PARODD) { 1767 lParity = LCR_PAR_ODD; 1768 dev_dbg(&port->dev, "%s - parity = odd\n", __func__); 1769 } else { 1770 lParity = LCR_PAR_EVEN; 1771 dev_dbg(&port->dev, "%s - parity = even\n", __func__); 1772 } 1773 1774 } else { 1775 dev_dbg(&port->dev, "%s - parity = none\n", __func__); 1776 } 1777 1778 if (cflag & CMSPAR) 1779 lParity = lParity | 0x20; 1780 1781 /* Change the Stop bit */ 1782 if (cflag & CSTOPB) { 1783 lStop = LCR_STOP_2; 1784 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); 1785 } else { 1786 lStop = LCR_STOP_1; 1787 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); 1788 } 1789 1790 /* Update the LCR with the correct value */ 1791 mos7840_port->shadowLCR &= 1792 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1793 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1794 1795 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, 1796 mos7840_port->shadowLCR); 1797 /* Disable Interrupts */ 1798 Data = 0x00; 1799 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1800 1801 Data = 0x00; 1802 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1803 1804 Data = 0xcf; 1805 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1806 1807 /* Send the updated LCR value to the mos7840 */ 1808 Data = mos7840_port->shadowLCR; 1809 1810 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1811 1812 Data = 0x00b; 1813 mos7840_port->shadowMCR = Data; 1814 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1815 Data = 0x00b; 1816 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1817 1818 /* set up the MCR register and send it to the mos7840 */ 1819 1820 mos7840_port->shadowMCR = MCR_MASTER_IE; 1821 if (cflag & CBAUD) 1822 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1823 1824 if (cflag & CRTSCTS) 1825 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1826 else 1827 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 1828 1829 Data = mos7840_port->shadowMCR; 1830 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1831 1832 /* Determine divisor based on baud rate */ 1833 baud = tty_get_baud_rate(tty); 1834 1835 if (!baud) { 1836 /* pick a default, any default... */ 1837 dev_dbg(&port->dev, "%s", "Picked default baud...\n"); 1838 baud = 9600; 1839 } 1840 1841 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); 1842 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 1843 1844 /* Enable Interrupts */ 1845 Data = 0x0c; 1846 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1847 1848 if (!mos7840_port->read_urb_busy) { 1849 mos7840_port->read_urb_busy = true; 1850 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1851 if (status) { 1852 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1853 status); 1854 mos7840_port->read_urb_busy = false; 1855 } 1856 } 1857 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, 1858 mos7840_port->shadowLCR); 1859 } 1860 1861 /***************************************************************************** 1862 * mos7840_set_termios 1863 * this function is called by the tty driver when it wants to change 1864 * the termios structure 1865 *****************************************************************************/ 1866 1867 static void mos7840_set_termios(struct tty_struct *tty, 1868 struct usb_serial_port *port, 1869 struct ktermios *old_termios) 1870 { 1871 int status; 1872 struct usb_serial *serial; 1873 struct moschip_port *mos7840_port; 1874 1875 if (mos7840_port_paranoia_check(port, __func__)) 1876 return; 1877 1878 serial = port->serial; 1879 1880 if (mos7840_serial_paranoia_check(serial, __func__)) 1881 return; 1882 1883 mos7840_port = mos7840_get_port_private(port); 1884 1885 if (mos7840_port == NULL) 1886 return; 1887 1888 if (!mos7840_port->open) { 1889 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1890 return; 1891 } 1892 1893 /* change the port settings to the new ones specified */ 1894 1895 mos7840_change_port_settings(tty, mos7840_port, old_termios); 1896 1897 if (!mos7840_port->read_urb) { 1898 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n"); 1899 return; 1900 } 1901 1902 if (!mos7840_port->read_urb_busy) { 1903 mos7840_port->read_urb_busy = true; 1904 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1905 if (status) { 1906 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1907 status); 1908 mos7840_port->read_urb_busy = false; 1909 } 1910 } 1911 } 1912 1913 /***************************************************************************** 1914 * mos7840_get_lsr_info - get line status register info 1915 * 1916 * Purpose: Let user call ioctl() to get info when the UART physically 1917 * is emptied. On bus types like RS485, the transmitter must 1918 * release the bus after transmitting. This must be done when 1919 * the transmit shift register is empty, not be done when the 1920 * transmit holding register is empty. This functionality 1921 * allows an RS485 driver to be written in user space. 1922 *****************************************************************************/ 1923 1924 static int mos7840_get_lsr_info(struct tty_struct *tty, 1925 unsigned int __user *value) 1926 { 1927 int count; 1928 unsigned int result = 0; 1929 1930 count = mos7840_chars_in_buffer(tty); 1931 if (count == 0) 1932 result = TIOCSER_TEMT; 1933 1934 if (copy_to_user(value, &result, sizeof(int))) 1935 return -EFAULT; 1936 return 0; 1937 } 1938 1939 /***************************************************************************** 1940 * mos7840_get_serial_info 1941 * function to get information about serial port 1942 *****************************************************************************/ 1943 1944 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 1945 struct serial_struct __user *retinfo) 1946 { 1947 struct serial_struct tmp; 1948 1949 if (mos7840_port == NULL) 1950 return -1; 1951 1952 memset(&tmp, 0, sizeof(tmp)); 1953 1954 tmp.type = PORT_16550A; 1955 tmp.line = mos7840_port->port->minor; 1956 tmp.port = mos7840_port->port->port_number; 1957 tmp.irq = 0; 1958 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 1959 tmp.baud_base = 9600; 1960 tmp.close_delay = 5 * HZ; 1961 tmp.closing_wait = 30 * HZ; 1962 1963 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1964 return -EFAULT; 1965 return 0; 1966 } 1967 1968 /***************************************************************************** 1969 * SerialIoctl 1970 * this function handles any ioctl calls to the driver 1971 *****************************************************************************/ 1972 1973 static int mos7840_ioctl(struct tty_struct *tty, 1974 unsigned int cmd, unsigned long arg) 1975 { 1976 struct usb_serial_port *port = tty->driver_data; 1977 void __user *argp = (void __user *)arg; 1978 struct moschip_port *mos7840_port; 1979 1980 if (mos7840_port_paranoia_check(port, __func__)) 1981 return -1; 1982 1983 mos7840_port = mos7840_get_port_private(port); 1984 1985 if (mos7840_port == NULL) 1986 return -1; 1987 1988 switch (cmd) { 1989 /* return number of bytes available */ 1990 1991 case TIOCSERGETLSR: 1992 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 1993 return mos7840_get_lsr_info(tty, argp); 1994 1995 case TIOCGSERIAL: 1996 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); 1997 return mos7840_get_serial_info(mos7840_port, argp); 1998 1999 case TIOCSSERIAL: 2000 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__); 2001 break; 2002 default: 2003 break; 2004 } 2005 return -ENOIOCTLCMD; 2006 } 2007 2008 static int mos7810_check(struct usb_serial *serial) 2009 { 2010 int i, pass_count = 0; 2011 u8 *buf; 2012 __u16 data = 0, mcr_data = 0; 2013 __u16 test_pattern = 0x55AA; 2014 int res; 2015 2016 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2017 if (!buf) 2018 return 0; /* failed to identify 7810 */ 2019 2020 /* Store MCR setting */ 2021 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2022 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, 2023 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2024 if (res == VENDOR_READ_LENGTH) 2025 mcr_data = *buf; 2026 2027 for (i = 0; i < 16; i++) { 2028 /* Send the 1-bit test pattern out to MCS7810 test pin */ 2029 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2030 MCS_WRREQ, MCS_WR_RTYPE, 2031 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), 2032 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); 2033 2034 /* Read the test pattern back */ 2035 res = usb_control_msg(serial->dev, 2036 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, 2037 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2038 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2039 if (res == VENDOR_READ_LENGTH) 2040 data = *buf; 2041 2042 /* If this is a MCS7810 device, both test patterns must match */ 2043 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) 2044 break; 2045 2046 pass_count++; 2047 } 2048 2049 /* Restore MCR setting */ 2050 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, 2051 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 2052 0, MOS_WDR_TIMEOUT); 2053 2054 kfree(buf); 2055 2056 if (pass_count == 16) 2057 return 1; 2058 2059 return 0; 2060 } 2061 2062 static int mos7840_probe(struct usb_serial *serial, 2063 const struct usb_device_id *id) 2064 { 2065 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); 2066 u8 *buf; 2067 int device_type; 2068 2069 if (product == MOSCHIP_DEVICE_ID_7810 || 2070 product == MOSCHIP_DEVICE_ID_7820) { 2071 device_type = product; 2072 goto out; 2073 } 2074 2075 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2076 if (!buf) 2077 return -ENOMEM; 2078 2079 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2080 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2081 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2082 2083 /* For a MCS7840 device GPIO0 must be set to 1 */ 2084 if (buf[0] & 0x01) 2085 device_type = MOSCHIP_DEVICE_ID_7840; 2086 else if (mos7810_check(serial)) 2087 device_type = MOSCHIP_DEVICE_ID_7810; 2088 else 2089 device_type = MOSCHIP_DEVICE_ID_7820; 2090 2091 kfree(buf); 2092 out: 2093 usb_set_serial_data(serial, (void *)(unsigned long)device_type); 2094 2095 return 0; 2096 } 2097 2098 static int mos7840_calc_num_ports(struct usb_serial *serial, 2099 struct usb_serial_endpoints *epds) 2100 { 2101 int device_type = (unsigned long)usb_get_serial_data(serial); 2102 int num_ports; 2103 2104 num_ports = (device_type >> 4) & 0x000F; 2105 2106 /* 2107 * num_ports is currently never zero as device_type is one of 2108 * MOSCHIP_DEVICE_ID_78{1,2,4}0. 2109 */ 2110 if (num_ports == 0) 2111 return -ENODEV; 2112 2113 if (epds->num_bulk_in < num_ports || epds->num_bulk_out < num_ports) { 2114 dev_err(&serial->interface->dev, "missing endpoints\n"); 2115 return -ENODEV; 2116 } 2117 2118 return num_ports; 2119 } 2120 2121 static int mos7840_port_probe(struct usb_serial_port *port) 2122 { 2123 struct usb_serial *serial = port->serial; 2124 int device_type = (unsigned long)usb_get_serial_data(serial); 2125 struct moschip_port *mos7840_port; 2126 int status; 2127 int pnum; 2128 __u16 Data; 2129 2130 /* we set up the pointers to the endpoints in the mos7840_open * 2131 * function, as the structures aren't created yet. */ 2132 2133 pnum = port->port_number; 2134 2135 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); 2136 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2137 if (!mos7840_port) 2138 return -ENOMEM; 2139 2140 /* Initialize all port interrupt end point to port 0 int 2141 * endpoint. Our device has only one interrupt end point 2142 * common to all port */ 2143 2144 mos7840_port->port = port; 2145 mos7840_set_port_private(port, mos7840_port); 2146 spin_lock_init(&mos7840_port->pool_lock); 2147 2148 /* minor is not initialised until later by 2149 * usb-serial.c:get_free_serial() and cannot therefore be used 2150 * to index device instances */ 2151 mos7840_port->port_num = pnum + 1; 2152 dev_dbg(&port->dev, "port->minor = %d\n", port->minor); 2153 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); 2154 2155 if (mos7840_port->port_num == 1) { 2156 mos7840_port->SpRegOffset = 0x0; 2157 mos7840_port->ControlRegOffset = 0x1; 2158 mos7840_port->DcrRegOffset = 0x4; 2159 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) { 2160 mos7840_port->SpRegOffset = 0x8; 2161 mos7840_port->ControlRegOffset = 0x9; 2162 mos7840_port->DcrRegOffset = 0x16; 2163 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) { 2164 mos7840_port->SpRegOffset = 0xa; 2165 mos7840_port->ControlRegOffset = 0xb; 2166 mos7840_port->DcrRegOffset = 0x19; 2167 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) { 2168 mos7840_port->SpRegOffset = 0xa; 2169 mos7840_port->ControlRegOffset = 0xb; 2170 mos7840_port->DcrRegOffset = 0x19; 2171 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) { 2172 mos7840_port->SpRegOffset = 0xc; 2173 mos7840_port->ControlRegOffset = 0xd; 2174 mos7840_port->DcrRegOffset = 0x1c; 2175 } 2176 mos7840_dump_serial_port(port, mos7840_port); 2177 mos7840_set_port_private(port, mos7840_port); 2178 2179 /* enable rx_disable bit in control register */ 2180 status = mos7840_get_reg_sync(port, 2181 mos7840_port->ControlRegOffset, &Data); 2182 if (status < 0) { 2183 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); 2184 goto out; 2185 } else 2186 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); 2187 Data |= 0x08; /* setting driver done bit */ 2188 Data |= 0x04; /* sp1_bit to have cts change reflect in 2189 modem status reg */ 2190 2191 /* Data |= 0x20; //rx_disable bit */ 2192 status = mos7840_set_reg_sync(port, 2193 mos7840_port->ControlRegOffset, Data); 2194 if (status < 0) { 2195 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2196 goto out; 2197 } else 2198 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); 2199 2200 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2201 and 0x24 in DCR3 */ 2202 Data = 0x01; 2203 status = mos7840_set_reg_sync(port, 2204 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2205 if (status < 0) { 2206 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); 2207 goto out; 2208 } else 2209 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); 2210 2211 Data = 0x05; 2212 status = mos7840_set_reg_sync(port, 2213 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2214 if (status < 0) { 2215 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); 2216 goto out; 2217 } else 2218 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); 2219 2220 Data = 0x24; 2221 status = mos7840_set_reg_sync(port, 2222 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2223 if (status < 0) { 2224 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); 2225 goto out; 2226 } else 2227 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); 2228 2229 /* write values in clkstart0x0 and clkmulti 0x20 */ 2230 Data = 0x0; 2231 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); 2232 if (status < 0) { 2233 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2234 goto out; 2235 } else 2236 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2237 2238 Data = 0x20; 2239 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); 2240 if (status < 0) { 2241 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); 2242 goto error; 2243 } else 2244 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); 2245 2246 /* write value 0x0 to scratchpad register */ 2247 Data = 0x00; 2248 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); 2249 if (status < 0) { 2250 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); 2251 goto out; 2252 } else 2253 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); 2254 2255 /* Zero Length flag register */ 2256 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { 2257 Data = 0xff; 2258 status = mos7840_set_reg_sync(port, 2259 (__u16) (ZLP_REG1 + 2260 ((__u16)mos7840_port->port_num)), Data); 2261 dev_dbg(&port->dev, "ZLIP offset %x\n", 2262 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); 2263 if (status < 0) { 2264 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); 2265 goto out; 2266 } else 2267 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); 2268 } else { 2269 Data = 0xff; 2270 status = mos7840_set_reg_sync(port, 2271 (__u16) (ZLP_REG1 + 2272 ((__u16)mos7840_port->port_num) - 0x1), Data); 2273 dev_dbg(&port->dev, "ZLIP offset %x\n", 2274 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); 2275 if (status < 0) { 2276 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); 2277 goto out; 2278 } else 2279 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); 2280 2281 } 2282 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2283 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2284 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2285 GFP_KERNEL); 2286 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2287 !mos7840_port->dr) { 2288 status = -ENOMEM; 2289 goto error; 2290 } 2291 2292 mos7840_port->has_led = false; 2293 2294 /* Initialize LED timers */ 2295 if (device_type == MOSCHIP_DEVICE_ID_7810) { 2296 mos7840_port->has_led = true; 2297 2298 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL); 2299 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr), 2300 GFP_KERNEL); 2301 if (!mos7840_port->led_urb || !mos7840_port->led_dr) { 2302 status = -ENOMEM; 2303 goto error; 2304 } 2305 2306 setup_timer(&mos7840_port->led_timer1, mos7840_led_off, 2307 (unsigned long)mos7840_port); 2308 mos7840_port->led_timer1.expires = 2309 jiffies + msecs_to_jiffies(LED_ON_MS); 2310 setup_timer(&mos7840_port->led_timer2, mos7840_led_flag_off, 2311 (unsigned long)mos7840_port); 2312 mos7840_port->led_timer2.expires = 2313 jiffies + msecs_to_jiffies(LED_OFF_MS); 2314 2315 /* Turn off LED */ 2316 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2317 } 2318 out: 2319 if (pnum == serial->num_ports - 1) { 2320 /* Zero Length flag enable */ 2321 Data = 0x0f; 2322 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2323 if (status < 0) { 2324 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status); 2325 goto error; 2326 } else 2327 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status); 2328 2329 /* setting configuration feature to one */ 2330 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2331 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 2332 MOS_WDR_TIMEOUT); 2333 } 2334 return 0; 2335 error: 2336 kfree(mos7840_port->led_dr); 2337 usb_free_urb(mos7840_port->led_urb); 2338 kfree(mos7840_port->dr); 2339 kfree(mos7840_port->ctrl_buf); 2340 usb_free_urb(mos7840_port->control_urb); 2341 kfree(mos7840_port); 2342 2343 return status; 2344 } 2345 2346 static int mos7840_port_remove(struct usb_serial_port *port) 2347 { 2348 struct moschip_port *mos7840_port; 2349 2350 mos7840_port = mos7840_get_port_private(port); 2351 2352 if (mos7840_port->has_led) { 2353 /* Turn off LED */ 2354 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2355 2356 del_timer_sync(&mos7840_port->led_timer1); 2357 del_timer_sync(&mos7840_port->led_timer2); 2358 2359 usb_kill_urb(mos7840_port->led_urb); 2360 usb_free_urb(mos7840_port->led_urb); 2361 kfree(mos7840_port->led_dr); 2362 } 2363 usb_kill_urb(mos7840_port->control_urb); 2364 usb_free_urb(mos7840_port->control_urb); 2365 kfree(mos7840_port->ctrl_buf); 2366 kfree(mos7840_port->dr); 2367 kfree(mos7840_port); 2368 2369 return 0; 2370 } 2371 2372 static struct usb_serial_driver moschip7840_4port_device = { 2373 .driver = { 2374 .owner = THIS_MODULE, 2375 .name = "mos7840", 2376 }, 2377 .description = DRIVER_DESC, 2378 .id_table = id_table, 2379 .num_interrupt_in = 1, 2380 .open = mos7840_open, 2381 .close = mos7840_close, 2382 .write = mos7840_write, 2383 .write_room = mos7840_write_room, 2384 .chars_in_buffer = mos7840_chars_in_buffer, 2385 .throttle = mos7840_throttle, 2386 .unthrottle = mos7840_unthrottle, 2387 .calc_num_ports = mos7840_calc_num_ports, 2388 .probe = mos7840_probe, 2389 .ioctl = mos7840_ioctl, 2390 .set_termios = mos7840_set_termios, 2391 .break_ctl = mos7840_break, 2392 .tiocmget = mos7840_tiocmget, 2393 .tiocmset = mos7840_tiocmset, 2394 .tiocmiwait = usb_serial_generic_tiocmiwait, 2395 .get_icount = usb_serial_generic_get_icount, 2396 .port_probe = mos7840_port_probe, 2397 .port_remove = mos7840_port_remove, 2398 .read_bulk_callback = mos7840_bulk_in_callback, 2399 .read_int_callback = mos7840_interrupt_callback, 2400 }; 2401 2402 static struct usb_serial_driver * const serial_drivers[] = { 2403 &moschip7840_4port_device, NULL 2404 }; 2405 2406 module_usb_serial_driver(serial_drivers, id_table); 2407 2408 MODULE_DESCRIPTION(DRIVER_DESC); 2409 MODULE_LICENSE("GPL"); 2410