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/slab.h> 28 #include <linux/tty.h> 29 #include <linux/tty_driver.h> 30 #include <linux/tty_flip.h> 31 #include <linux/module.h> 32 #include <linux/serial.h> 33 #include <linux/usb.h> 34 #include <linux/usb/serial.h> 35 #include <linux/uaccess.h> 36 37 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" 38 39 /* 40 * 16C50 UART register defines 41 */ 42 43 #define LCR_BITS_5 0x00 /* 5 bits/char */ 44 #define LCR_BITS_6 0x01 /* 6 bits/char */ 45 #define LCR_BITS_7 0x02 /* 7 bits/char */ 46 #define LCR_BITS_8 0x03 /* 8 bits/char */ 47 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ 48 49 #define LCR_STOP_1 0x00 /* 1 stop bit */ 50 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ 51 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ 52 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ 53 54 #define LCR_PAR_NONE 0x00 /* No parity */ 55 #define LCR_PAR_ODD 0x08 /* Odd parity */ 56 #define LCR_PAR_EVEN 0x18 /* Even parity */ 57 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ 58 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ 59 #define LCR_PAR_MASK 0x38 /* Mask for parity field */ 60 61 #define LCR_SET_BREAK 0x40 /* Set Break condition */ 62 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ 63 64 #define MCR_DTR 0x01 /* Assert DTR */ 65 #define MCR_RTS 0x02 /* Assert RTS */ 66 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ 67 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ 68 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ 69 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ 70 71 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ 72 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ 73 #define MOS7840_MSR_RI 0x40 /* Current state of RI */ 74 #define MOS7840_MSR_CD 0x80 /* Current state of CD */ 75 76 /* 77 * Defines used for sending commands to port 78 */ 79 80 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */ 81 82 #define MOS_PORT1 0x0200 83 #define MOS_PORT2 0x0300 84 #define MOS_VENREG 0x0000 85 #define MOS_MAX_PORT 0x02 86 #define MOS_WRITE 0x0E 87 #define MOS_READ 0x0D 88 89 /* Requests */ 90 #define MCS_RD_RTYPE 0xC0 91 #define MCS_WR_RTYPE 0x40 92 #define MCS_RDREQ 0x0D 93 #define MCS_WRREQ 0x0E 94 #define MCS_CTRL_TIMEOUT 500 95 #define VENDOR_READ_LENGTH (0x01) 96 97 #define MAX_NAME_LEN 64 98 99 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ 100 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ 101 102 /* For higher baud Rates use TIOCEXBAUD */ 103 #define TIOCEXBAUD 0x5462 104 105 /* vendor id and device id defines */ 106 107 /* The native mos7840/7820 component */ 108 #define USB_VENDOR_ID_MOSCHIP 0x9710 109 #define MOSCHIP_DEVICE_ID_7840 0x7840 110 #define MOSCHIP_DEVICE_ID_7820 0x7820 111 #define MOSCHIP_DEVICE_ID_7810 0x7810 112 /* The native component can have its vendor/device id's overridden 113 * in vendor-specific implementations. Such devices can be handled 114 * by making a change here, in id_table. 115 */ 116 #define USB_VENDOR_ID_BANDB 0x0856 117 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22 118 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00 119 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24 120 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01 121 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29 122 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30 123 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31 124 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32 125 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 126 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02 127 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 128 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03 129 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24 130 131 /* This driver also supports 132 * ATEN UC2324 device using Moschip MCS7840 133 * ATEN UC2322 device using Moschip MCS7820 134 */ 135 #define USB_VENDOR_ID_ATENINTL 0x0557 136 #define ATENINTL_DEVICE_ID_UC2324 0x2011 137 #define ATENINTL_DEVICE_ID_UC2322 0x7820 138 139 /* Interrupt Routine Defines */ 140 141 #define SERIAL_IIR_RLS 0x06 142 #define SERIAL_IIR_MS 0x00 143 144 /* 145 * Emulation of the bit mask on the LINE STATUS REGISTER. 146 */ 147 #define SERIAL_LSR_DR 0x0001 148 #define SERIAL_LSR_OE 0x0002 149 #define SERIAL_LSR_PE 0x0004 150 #define SERIAL_LSR_FE 0x0008 151 #define SERIAL_LSR_BI 0x0010 152 153 #define MOS_MSR_DELTA_CTS 0x10 154 #define MOS_MSR_DELTA_DSR 0x20 155 #define MOS_MSR_DELTA_RI 0x40 156 #define MOS_MSR_DELTA_CD 0x80 157 158 /* Serial Port register Address */ 159 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) 160 #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) 161 #define LINE_CONTROL_REGISTER ((__u16)(0x03)) 162 #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) 163 #define LINE_STATUS_REGISTER ((__u16)(0x05)) 164 #define MODEM_STATUS_REGISTER ((__u16)(0x06)) 165 #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) 166 #define DIVISOR_LATCH_LSB ((__u16)(0x00)) 167 #define DIVISOR_LATCH_MSB ((__u16)(0x01)) 168 169 #define CLK_MULTI_REGISTER ((__u16)(0x02)) 170 #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) 171 #define GPIO_REGISTER ((__u16)(0x07)) 172 173 #define SERIAL_LCR_DLAB ((__u16)(0x0080)) 174 175 /* 176 * URB POOL related defines 177 */ 178 #define NUM_URBS 16 /* URB Count */ 179 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 180 181 /* LED on/off milliseconds*/ 182 #define LED_ON_MS 500 183 #define LED_OFF_MS 500 184 185 enum mos7840_flag { 186 MOS7840_FLAG_CTRL_BUSY, 187 MOS7840_FLAG_LED_BUSY, 188 }; 189 190 static const struct usb_device_id id_table[] = { 191 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 192 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 193 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)}, 194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, 195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, 196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, 197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, 198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, 199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, 200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, 201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, 202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, 204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, 206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, 207 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 208 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 209 {} /* terminating entry */ 210 }; 211 MODULE_DEVICE_TABLE(usb, id_table); 212 213 /* This structure holds all of the local port information */ 214 215 struct moschip_port { 216 int port_num; /*Actual port number in the device(1,2,etc) */ 217 struct urb *write_urb; /* write URB for this port */ 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 *val = buf[0]; 289 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val); 290 291 kfree(buf); 292 return ret; 293 } 294 295 /* 296 * mos7840_set_uart_reg 297 * To set the Uart register by calling usb_fill_control_urb function by 298 * passing usb_sndctrlpipe function as parameter. 299 */ 300 301 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 302 __u16 val) 303 { 304 305 struct usb_device *dev = port->serial->dev; 306 val = val & 0x00ff; 307 /* For the UART control registers, the application number need 308 to be Or'ed */ 309 if (port->serial->num_ports == 4) { 310 val |= ((__u16)port->port_number + 1) << 8; 311 } else { 312 if (port->port_number == 0) { 313 val |= ((__u16)port->port_number + 1) << 8; 314 } else { 315 val |= ((__u16)port->port_number + 2) << 8; 316 } 317 } 318 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val); 319 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 320 MCS_WR_RTYPE, val, reg, NULL, 0, 321 MOS_WDR_TIMEOUT); 322 323 } 324 325 /* 326 * mos7840_get_uart_reg 327 * To set the Control register by calling usb_fill_control_urb function 328 * by passing usb_rcvctrlpipe function as parameter. 329 */ 330 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 331 __u16 *val) 332 { 333 struct usb_device *dev = port->serial->dev; 334 int ret = 0; 335 __u16 Wval; 336 u8 *buf; 337 338 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 339 if (!buf) 340 return -ENOMEM; 341 342 /* Wval is same as application number */ 343 if (port->serial->num_ports == 4) { 344 Wval = ((__u16)port->port_number + 1) << 8; 345 } else { 346 if (port->port_number == 0) { 347 Wval = ((__u16)port->port_number + 1) << 8; 348 } else { 349 Wval = ((__u16)port->port_number + 2) << 8; 350 } 351 } 352 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval); 353 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 354 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, 355 MOS_WDR_TIMEOUT); 356 *val = buf[0]; 357 358 kfree(buf); 359 return ret; 360 } 361 362 static void mos7840_dump_serial_port(struct usb_serial_port *port, 363 struct moschip_port *mos7840_port) 364 { 365 366 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 367 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset); 368 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset); 369 370 } 371 372 /************************************************************************/ 373 /************************************************************************/ 374 /* I N T E R F A C E F U N C T I O N S */ 375 /* I N T E R F A C E F U N C T I O N S */ 376 /************************************************************************/ 377 /************************************************************************/ 378 379 static inline void mos7840_set_port_private(struct usb_serial_port *port, 380 struct moschip_port *data) 381 { 382 usb_set_serial_port_data(port, (void *)data); 383 } 384 385 static inline struct moschip_port *mos7840_get_port_private(struct 386 usb_serial_port 387 *port) 388 { 389 return (struct moschip_port *)usb_get_serial_port_data(port); 390 } 391 392 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 393 { 394 struct moschip_port *mos7840_port; 395 struct async_icount *icount; 396 mos7840_port = port; 397 if (new_msr & 398 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 399 MOS_MSR_DELTA_CD)) { 400 icount = &mos7840_port->port->icount; 401 402 /* update input line counters */ 403 if (new_msr & MOS_MSR_DELTA_CTS) 404 icount->cts++; 405 if (new_msr & MOS_MSR_DELTA_DSR) 406 icount->dsr++; 407 if (new_msr & MOS_MSR_DELTA_CD) 408 icount->dcd++; 409 if (new_msr & MOS_MSR_DELTA_RI) 410 icount->rng++; 411 412 wake_up_interruptible(&port->port->port.delta_msr_wait); 413 } 414 } 415 416 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 417 { 418 struct async_icount *icount; 419 420 if (new_lsr & SERIAL_LSR_BI) { 421 /* 422 * Parity and Framing errors only count if they 423 * occur exclusive of a break being 424 * received. 425 */ 426 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 427 } 428 429 /* update input line counters */ 430 icount = &port->port->icount; 431 if (new_lsr & SERIAL_LSR_BI) 432 icount->brk++; 433 if (new_lsr & SERIAL_LSR_OE) 434 icount->overrun++; 435 if (new_lsr & SERIAL_LSR_PE) 436 icount->parity++; 437 if (new_lsr & SERIAL_LSR_FE) 438 icount->frame++; 439 } 440 441 /************************************************************************/ 442 /************************************************************************/ 443 /* U S B C A L L B A C K F U N C T I O N S */ 444 /* U S B C A L L B A C K F U N C T I O N S */ 445 /************************************************************************/ 446 /************************************************************************/ 447 448 static void mos7840_control_callback(struct urb *urb) 449 { 450 unsigned char *data; 451 struct moschip_port *mos7840_port; 452 struct device *dev = &urb->dev->dev; 453 __u8 regval = 0x0; 454 int status = urb->status; 455 456 mos7840_port = urb->context; 457 458 switch (status) { 459 case 0: 460 /* success */ 461 break; 462 case -ECONNRESET: 463 case -ENOENT: 464 case -ESHUTDOWN: 465 /* this urb is terminated, clean up */ 466 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); 467 goto out; 468 default: 469 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); 470 goto out; 471 } 472 473 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length); 474 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__, 475 mos7840_port->MsrLsr, mos7840_port->port_num); 476 data = urb->transfer_buffer; 477 regval = (__u8) data[0]; 478 dev_dbg(dev, "%s data is %x\n", __func__, regval); 479 if (mos7840_port->MsrLsr == 0) 480 mos7840_handle_new_msr(mos7840_port, regval); 481 else if (mos7840_port->MsrLsr == 1) 482 mos7840_handle_new_lsr(mos7840_port, regval); 483 out: 484 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags); 485 } 486 487 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 488 __u16 *val) 489 { 490 struct usb_device *dev = mcs->port->serial->dev; 491 struct usb_ctrlrequest *dr = mcs->dr; 492 unsigned char *buffer = mcs->ctrl_buf; 493 int ret; 494 495 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags)) 496 return -EBUSY; 497 498 dr->bRequestType = MCS_RD_RTYPE; 499 dr->bRequest = MCS_RDREQ; 500 dr->wValue = cpu_to_le16(Wval); /* 0 */ 501 dr->wIndex = cpu_to_le16(reg); 502 dr->wLength = cpu_to_le16(2); 503 504 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 505 (unsigned char *)dr, buffer, 2, 506 mos7840_control_callback, mcs); 507 mcs->control_urb->transfer_buffer_length = 2; 508 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 509 if (ret) 510 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags); 511 512 return ret; 513 } 514 515 static void mos7840_set_led_callback(struct urb *urb) 516 { 517 switch (urb->status) { 518 case 0: 519 /* Success */ 520 break; 521 case -ECONNRESET: 522 case -ENOENT: 523 case -ESHUTDOWN: 524 /* This urb is terminated, clean up */ 525 dev_dbg(&urb->dev->dev, "%s - urb shutting down: %d\n", 526 __func__, urb->status); 527 break; 528 default: 529 dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n", 530 __func__, urb->status); 531 } 532 } 533 534 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, 535 __u16 reg) 536 { 537 struct usb_device *dev = mcs->port->serial->dev; 538 struct usb_ctrlrequest *dr = mcs->led_dr; 539 540 dr->bRequestType = MCS_WR_RTYPE; 541 dr->bRequest = MCS_WRREQ; 542 dr->wValue = cpu_to_le16(wval); 543 dr->wIndex = cpu_to_le16(reg); 544 dr->wLength = cpu_to_le16(0); 545 546 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0), 547 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL); 548 549 usb_submit_urb(mcs->led_urb, GFP_ATOMIC); 550 } 551 552 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, 553 __u16 val) 554 { 555 struct usb_device *dev = port->serial->dev; 556 557 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, 558 val, reg, NULL, 0, MOS_WDR_TIMEOUT); 559 } 560 561 static void mos7840_led_off(unsigned long arg) 562 { 563 struct moschip_port *mcs = (struct moschip_port *) arg; 564 565 /* Turn off LED */ 566 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER); 567 mod_timer(&mcs->led_timer2, 568 jiffies + msecs_to_jiffies(LED_OFF_MS)); 569 } 570 571 static void mos7840_led_flag_off(unsigned long arg) 572 { 573 struct moschip_port *mcs = (struct moschip_port *) arg; 574 575 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags); 576 } 577 578 static void mos7840_led_activity(struct usb_serial_port *port) 579 { 580 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 581 582 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags)) 583 return; 584 585 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER); 586 mod_timer(&mos7840_port->led_timer1, 587 jiffies + msecs_to_jiffies(LED_ON_MS)); 588 } 589 590 /***************************************************************************** 591 * mos7840_interrupt_callback 592 * this is the callback function for when we have received data on the 593 * interrupt endpoint. 594 *****************************************************************************/ 595 596 static void mos7840_interrupt_callback(struct urb *urb) 597 { 598 int result; 599 int length; 600 struct moschip_port *mos7840_port; 601 struct usb_serial *serial; 602 __u16 Data; 603 unsigned char *data; 604 __u8 sp[5], st; 605 int i, rv = 0; 606 __u16 wval, wreg = 0; 607 int status = urb->status; 608 609 switch (status) { 610 case 0: 611 /* success */ 612 break; 613 case -ECONNRESET: 614 case -ENOENT: 615 case -ESHUTDOWN: 616 /* this urb is terminated, clean up */ 617 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 618 __func__, status); 619 return; 620 default: 621 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", 622 __func__, status); 623 goto exit; 624 } 625 626 length = urb->actual_length; 627 data = urb->transfer_buffer; 628 629 serial = urb->context; 630 631 /* Moschip get 5 bytes 632 * Byte 1 IIR Port 1 (port.number is 0) 633 * Byte 2 IIR Port 2 (port.number is 1) 634 * Byte 3 IIR Port 3 (port.number is 2) 635 * Byte 4 IIR Port 4 (port.number is 3) 636 * Byte 5 FIFO status for both */ 637 638 if (length > 5) { 639 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n"); 640 return; 641 } 642 643 sp[0] = (__u8) data[0]; 644 sp[1] = (__u8) data[1]; 645 sp[2] = (__u8) data[2]; 646 sp[3] = (__u8) data[3]; 647 st = (__u8) data[4]; 648 649 for (i = 0; i < serial->num_ports; i++) { 650 mos7840_port = mos7840_get_port_private(serial->port[i]); 651 wval = ((__u16)serial->port[i]->port_number + 1) << 8; 652 if (mos7840_port->open) { 653 if (sp[i] & 0x01) { 654 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i); 655 } else { 656 switch (sp[i] & 0x0f) { 657 case SERIAL_IIR_RLS: 658 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i); 659 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n"); 660 mos7840_port->MsrLsr = 1; 661 wreg = LINE_STATUS_REGISTER; 662 break; 663 case SERIAL_IIR_MS: 664 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i); 665 mos7840_port->MsrLsr = 0; 666 wreg = MODEM_STATUS_REGISTER; 667 break; 668 } 669 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 670 } 671 } 672 } 673 if (!(rv < 0)) 674 /* the completion handler for the control urb will resubmit */ 675 return; 676 exit: 677 result = usb_submit_urb(urb, GFP_ATOMIC); 678 if (result) { 679 dev_err(&urb->dev->dev, 680 "%s - Error %d submitting interrupt urb\n", 681 __func__, result); 682 } 683 } 684 685 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 686 const char *function) 687 { 688 if (!port) { 689 pr_debug("%s - port == NULL\n", function); 690 return -1; 691 } 692 if (!port->serial) { 693 pr_debug("%s - port->serial == NULL\n", function); 694 return -1; 695 } 696 697 return 0; 698 } 699 700 /* Inline functions to check the sanity of a pointer that is passed to us */ 701 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 702 const char *function) 703 { 704 if (!serial) { 705 pr_debug("%s - serial == NULL\n", function); 706 return -1; 707 } 708 if (!serial->type) { 709 pr_debug("%s - serial->type == NULL!\n", function); 710 return -1; 711 } 712 713 return 0; 714 } 715 716 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 717 const char *function) 718 { 719 /* if no port was specified, or it fails a paranoia check */ 720 if (!port || 721 mos7840_port_paranoia_check(port, function) || 722 mos7840_serial_paranoia_check(port->serial, function)) { 723 /* then say that we don't have a valid usb_serial thing, 724 * which will end up genrating -ENODEV return values */ 725 return NULL; 726 } 727 728 return port->serial; 729 } 730 731 /***************************************************************************** 732 * mos7840_bulk_in_callback 733 * this is the callback function for when we have received data on the 734 * bulk in endpoint. 735 *****************************************************************************/ 736 737 static void mos7840_bulk_in_callback(struct urb *urb) 738 { 739 int retval; 740 unsigned char *data; 741 struct usb_serial *serial; 742 struct usb_serial_port *port; 743 struct moschip_port *mos7840_port; 744 int status = urb->status; 745 746 mos7840_port = urb->context; 747 if (!mos7840_port) 748 return; 749 750 if (status) { 751 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); 752 mos7840_port->read_urb_busy = false; 753 return; 754 } 755 756 port = mos7840_port->port; 757 if (mos7840_port_paranoia_check(port, __func__)) { 758 mos7840_port->read_urb_busy = false; 759 return; 760 } 761 762 serial = mos7840_get_usb_serial(port, __func__); 763 if (!serial) { 764 mos7840_port->read_urb_busy = false; 765 return; 766 } 767 768 data = urb->transfer_buffer; 769 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); 770 771 if (urb->actual_length) { 772 struct tty_port *tport = &mos7840_port->port->port; 773 tty_insert_flip_string(tport, data, urb->actual_length); 774 tty_flip_buffer_push(tport); 775 port->icount.rx += urb->actual_length; 776 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx); 777 } 778 779 if (!mos7840_port->read_urb) { 780 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n"); 781 mos7840_port->read_urb_busy = false; 782 return; 783 } 784 785 if (mos7840_port->has_led) 786 mos7840_led_activity(port); 787 788 mos7840_port->read_urb_busy = true; 789 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 790 791 if (retval) { 792 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); 793 mos7840_port->read_urb_busy = false; 794 } 795 } 796 797 /***************************************************************************** 798 * mos7840_bulk_out_data_callback 799 * this is the callback function for when we have finished sending 800 * serial data on the bulk out endpoint. 801 *****************************************************************************/ 802 803 static void mos7840_bulk_out_data_callback(struct urb *urb) 804 { 805 struct moschip_port *mos7840_port; 806 struct usb_serial_port *port; 807 int status = urb->status; 808 int i; 809 810 mos7840_port = urb->context; 811 port = mos7840_port->port; 812 spin_lock(&mos7840_port->pool_lock); 813 for (i = 0; i < NUM_URBS; i++) { 814 if (urb == mos7840_port->write_urb_pool[i]) { 815 mos7840_port->busy[i] = 0; 816 break; 817 } 818 } 819 spin_unlock(&mos7840_port->pool_lock); 820 821 if (status) { 822 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status); 823 return; 824 } 825 826 if (mos7840_port_paranoia_check(port, __func__)) 827 return; 828 829 if (mos7840_port->open) 830 tty_port_tty_wakeup(&port->port); 831 832 } 833 834 /************************************************************************/ 835 /* 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 */ 836 /************************************************************************/ 837 838 /***************************************************************************** 839 * mos7840_open 840 * this function is called by the tty driver when a port is opened 841 * If successful, we return 0 842 * Otherwise we return a negative error number. 843 *****************************************************************************/ 844 845 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 846 { 847 int response; 848 int j; 849 struct usb_serial *serial; 850 struct urb *urb; 851 __u16 Data; 852 int status; 853 struct moschip_port *mos7840_port; 854 struct moschip_port *port0; 855 856 if (mos7840_port_paranoia_check(port, __func__)) 857 return -ENODEV; 858 859 serial = port->serial; 860 861 if (mos7840_serial_paranoia_check(serial, __func__)) 862 return -ENODEV; 863 864 mos7840_port = mos7840_get_port_private(port); 865 port0 = mos7840_get_port_private(serial->port[0]); 866 867 if (mos7840_port == NULL || port0 == NULL) 868 return -ENODEV; 869 870 usb_clear_halt(serial->dev, port->write_urb->pipe); 871 usb_clear_halt(serial->dev, port->read_urb->pipe); 872 port0->open_ports++; 873 874 /* Initialising the write urb pool */ 875 for (j = 0; j < NUM_URBS; ++j) { 876 urb = usb_alloc_urb(0, GFP_KERNEL); 877 mos7840_port->write_urb_pool[j] = urb; 878 if (!urb) 879 continue; 880 881 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 882 GFP_KERNEL); 883 if (!urb->transfer_buffer) { 884 usb_free_urb(urb); 885 mos7840_port->write_urb_pool[j] = NULL; 886 continue; 887 } 888 } 889 890 /***************************************************************************** 891 * Initialize MCS7840 -- Write Init values to corresponding Registers 892 * 893 * Register Index 894 * 1 : IER 895 * 2 : FCR 896 * 3 : LCR 897 * 4 : MCR 898 * 899 * 0x08 : SP1/2 Control Reg 900 *****************************************************************************/ 901 902 /* NEED to check the following Block */ 903 904 Data = 0x0; 905 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 906 if (status < 0) { 907 dev_dbg(&port->dev, "Reading Spreg failed\n"); 908 goto err; 909 } 910 Data |= 0x80; 911 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 912 if (status < 0) { 913 dev_dbg(&port->dev, "writing Spreg failed\n"); 914 goto err; 915 } 916 917 Data &= ~0x80; 918 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 919 if (status < 0) { 920 dev_dbg(&port->dev, "writing Spreg failed\n"); 921 goto err; 922 } 923 /* End of block to be checked */ 924 925 Data = 0x0; 926 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 927 &Data); 928 if (status < 0) { 929 dev_dbg(&port->dev, "Reading Controlreg failed\n"); 930 goto err; 931 } 932 Data |= 0x08; /* Driver done bit */ 933 Data |= 0x20; /* rx_disable */ 934 status = mos7840_set_reg_sync(port, 935 mos7840_port->ControlRegOffset, Data); 936 if (status < 0) { 937 dev_dbg(&port->dev, "writing Controlreg failed\n"); 938 goto err; 939 } 940 /* do register settings here */ 941 /* Set all regs to the device default values. */ 942 /*********************************** 943 * First Disable all interrupts. 944 ***********************************/ 945 Data = 0x00; 946 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 947 if (status < 0) { 948 dev_dbg(&port->dev, "disabling interrupts failed\n"); 949 goto err; 950 } 951 /* Set FIFO_CONTROL_REGISTER to the default value */ 952 Data = 0x00; 953 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 954 if (status < 0) { 955 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 956 goto err; 957 } 958 959 Data = 0xcf; 960 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 961 if (status < 0) { 962 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 963 goto err; 964 } 965 966 Data = 0x03; 967 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 968 mos7840_port->shadowLCR = Data; 969 970 Data = 0x0b; 971 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 972 mos7840_port->shadowMCR = Data; 973 974 Data = 0x00; 975 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 976 mos7840_port->shadowLCR = Data; 977 978 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 979 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 980 981 Data = 0x0c; 982 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 983 984 Data = 0x0; 985 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 986 987 Data = 0x00; 988 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 989 990 Data = Data & ~SERIAL_LCR_DLAB; 991 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 992 mos7840_port->shadowLCR = Data; 993 994 /* clearing Bulkin and Bulkout Fifo */ 995 Data = 0x0; 996 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 997 998 Data = Data | 0x0c; 999 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1000 1001 Data = Data & ~0x0c; 1002 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1003 /* Finally enable all interrupts */ 1004 Data = 0x0c; 1005 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1006 1007 /* clearing rx_disable */ 1008 Data = 0x0; 1009 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1010 &Data); 1011 Data = Data & ~0x20; 1012 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1013 Data); 1014 1015 /* rx_negate */ 1016 Data = 0x0; 1017 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1018 &Data); 1019 Data = Data | 0x10; 1020 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1021 Data); 1022 1023 /* Check to see if we've set up our endpoint info yet * 1024 * (can't set it up in mos7840_startup as the structures * 1025 * were not set up at that time.) */ 1026 if (port0->open_ports == 1) { 1027 if (serial->port[0]->interrupt_in_buffer == NULL) { 1028 /* set up interrupt urb */ 1029 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1030 serial->dev, 1031 usb_rcvintpipe(serial->dev, 1032 serial->port[0]->interrupt_in_endpointAddress), 1033 serial->port[0]->interrupt_in_buffer, 1034 serial->port[0]->interrupt_in_urb-> 1035 transfer_buffer_length, 1036 mos7840_interrupt_callback, 1037 serial, 1038 serial->port[0]->interrupt_in_urb->interval); 1039 1040 /* start interrupt read for mos7840 * 1041 * will continue as long as mos7840 is connected */ 1042 1043 response = 1044 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1045 GFP_KERNEL); 1046 if (response) { 1047 dev_err(&port->dev, "%s - Error %d submitting " 1048 "interrupt urb\n", __func__, response); 1049 } 1050 1051 } 1052 1053 } 1054 1055 /* see if we've set up our endpoint info yet * 1056 * (can't set it up in mos7840_startup as the * 1057 * structures were not set up at that time.) */ 1058 1059 dev_dbg(&port->dev, "port number is %d\n", port->port_number); 1060 dev_dbg(&port->dev, "minor number is %d\n", port->minor); 1061 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress); 1062 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress); 1063 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress); 1064 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num); 1065 mos7840_port->read_urb = port->read_urb; 1066 1067 /* set up our bulk in urb */ 1068 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1069 usb_fill_bulk_urb(mos7840_port->read_urb, 1070 serial->dev, 1071 usb_rcvbulkpipe(serial->dev, 1072 (port->bulk_in_endpointAddress) + 2), 1073 port->bulk_in_buffer, 1074 mos7840_port->read_urb->transfer_buffer_length, 1075 mos7840_bulk_in_callback, mos7840_port); 1076 } else { 1077 usb_fill_bulk_urb(mos7840_port->read_urb, 1078 serial->dev, 1079 usb_rcvbulkpipe(serial->dev, 1080 port->bulk_in_endpointAddress), 1081 port->bulk_in_buffer, 1082 mos7840_port->read_urb->transfer_buffer_length, 1083 mos7840_bulk_in_callback, mos7840_port); 1084 } 1085 1086 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress); 1087 mos7840_port->read_urb_busy = true; 1088 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1089 if (response) { 1090 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1091 __func__, response); 1092 mos7840_port->read_urb_busy = false; 1093 } 1094 1095 /* initialize our port settings */ 1096 /* Must set to enable ints! */ 1097 mos7840_port->shadowMCR = MCR_MASTER_IE; 1098 /* send a open port command */ 1099 mos7840_port->open = 1; 1100 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1101 1102 return 0; 1103 err: 1104 for (j = 0; j < NUM_URBS; ++j) { 1105 urb = mos7840_port->write_urb_pool[j]; 1106 if (!urb) 1107 continue; 1108 kfree(urb->transfer_buffer); 1109 usb_free_urb(urb); 1110 } 1111 return status; 1112 } 1113 1114 /***************************************************************************** 1115 * mos7840_chars_in_buffer 1116 * this function is called by the tty driver when it wants to know how many 1117 * bytes of data we currently have outstanding in the port (data that has 1118 * been written, but hasn't made it out the port yet) 1119 * If successful, we return the number of bytes left to be written in the 1120 * system, 1121 * Otherwise we return zero. 1122 *****************************************************************************/ 1123 1124 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1125 { 1126 struct usb_serial_port *port = tty->driver_data; 1127 int i; 1128 int chars = 0; 1129 unsigned long flags; 1130 struct moschip_port *mos7840_port; 1131 1132 if (mos7840_port_paranoia_check(port, __func__)) 1133 return 0; 1134 1135 mos7840_port = mos7840_get_port_private(port); 1136 if (mos7840_port == NULL) 1137 return 0; 1138 1139 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1140 for (i = 0; i < NUM_URBS; ++i) { 1141 if (mos7840_port->busy[i]) { 1142 struct urb *urb = mos7840_port->write_urb_pool[i]; 1143 chars += urb->transfer_buffer_length; 1144 } 1145 } 1146 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1147 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 1148 return chars; 1149 1150 } 1151 1152 /***************************************************************************** 1153 * mos7840_close 1154 * this function is called by the tty driver when a port is closed 1155 *****************************************************************************/ 1156 1157 static void mos7840_close(struct usb_serial_port *port) 1158 { 1159 struct usb_serial *serial; 1160 struct moschip_port *mos7840_port; 1161 struct moschip_port *port0; 1162 int j; 1163 __u16 Data; 1164 1165 if (mos7840_port_paranoia_check(port, __func__)) 1166 return; 1167 1168 serial = mos7840_get_usb_serial(port, __func__); 1169 if (!serial) 1170 return; 1171 1172 mos7840_port = mos7840_get_port_private(port); 1173 port0 = mos7840_get_port_private(serial->port[0]); 1174 1175 if (mos7840_port == NULL || port0 == NULL) 1176 return; 1177 1178 for (j = 0; j < NUM_URBS; ++j) 1179 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1180 1181 /* Freeing Write URBs */ 1182 for (j = 0; j < NUM_URBS; ++j) { 1183 if (mos7840_port->write_urb_pool[j]) { 1184 kfree(mos7840_port->write_urb_pool[j]->transfer_buffer); 1185 usb_free_urb(mos7840_port->write_urb_pool[j]); 1186 } 1187 } 1188 1189 usb_kill_urb(mos7840_port->write_urb); 1190 usb_kill_urb(mos7840_port->read_urb); 1191 mos7840_port->read_urb_busy = false; 1192 1193 port0->open_ports--; 1194 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports); 1195 if (port0->open_ports == 0) { 1196 if (serial->port[0]->interrupt_in_urb) { 1197 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n"); 1198 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1199 } 1200 } 1201 1202 if (mos7840_port->write_urb) { 1203 /* if this urb had a transfer buffer already (old tx) free it */ 1204 kfree(mos7840_port->write_urb->transfer_buffer); 1205 usb_free_urb(mos7840_port->write_urb); 1206 } 1207 1208 Data = 0x0; 1209 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1210 1211 Data = 0x00; 1212 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1213 1214 mos7840_port->open = 0; 1215 } 1216 1217 /***************************************************************************** 1218 * mos7840_break 1219 * this function sends a break to the port 1220 *****************************************************************************/ 1221 static void mos7840_break(struct tty_struct *tty, int break_state) 1222 { 1223 struct usb_serial_port *port = tty->driver_data; 1224 unsigned char data; 1225 struct usb_serial *serial; 1226 struct moschip_port *mos7840_port; 1227 1228 if (mos7840_port_paranoia_check(port, __func__)) 1229 return; 1230 1231 serial = mos7840_get_usb_serial(port, __func__); 1232 if (!serial) 1233 return; 1234 1235 mos7840_port = mos7840_get_port_private(port); 1236 1237 if (mos7840_port == NULL) 1238 return; 1239 1240 if (break_state == -1) 1241 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1242 else 1243 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1244 1245 /* FIXME: no locking on shadowLCR anywhere in driver */ 1246 mos7840_port->shadowLCR = data; 1247 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1248 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1249 mos7840_port->shadowLCR); 1250 } 1251 1252 /***************************************************************************** 1253 * mos7840_write_room 1254 * this function is called by the tty driver when it wants to know how many 1255 * bytes of data we can accept for a specific port. 1256 * If successful, we return the amount of room that we have for this port 1257 * Otherwise we return a negative error number. 1258 *****************************************************************************/ 1259 1260 static int mos7840_write_room(struct tty_struct *tty) 1261 { 1262 struct usb_serial_port *port = tty->driver_data; 1263 int i; 1264 int room = 0; 1265 unsigned long flags; 1266 struct moschip_port *mos7840_port; 1267 1268 if (mos7840_port_paranoia_check(port, __func__)) 1269 return -1; 1270 1271 mos7840_port = mos7840_get_port_private(port); 1272 if (mos7840_port == NULL) 1273 return -1; 1274 1275 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1276 for (i = 0; i < NUM_URBS; ++i) { 1277 if (!mos7840_port->busy[i]) 1278 room += URB_TRANSFER_BUFFER_SIZE; 1279 } 1280 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1281 1282 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1283 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); 1284 return room; 1285 1286 } 1287 1288 /***************************************************************************** 1289 * mos7840_write 1290 * this function is called by the tty driver when data should be written to 1291 * the port. 1292 * If successful, we return the number of bytes written, otherwise we 1293 * return a negative error number. 1294 *****************************************************************************/ 1295 1296 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1297 const unsigned char *data, int count) 1298 { 1299 int status; 1300 int i; 1301 int bytes_sent = 0; 1302 int transfer_size; 1303 unsigned long flags; 1304 1305 struct moschip_port *mos7840_port; 1306 struct usb_serial *serial; 1307 struct urb *urb; 1308 /* __u16 Data; */ 1309 const unsigned char *current_position = data; 1310 unsigned char *data1; 1311 1312 if (mos7840_port_paranoia_check(port, __func__)) 1313 return -1; 1314 1315 serial = port->serial; 1316 if (mos7840_serial_paranoia_check(serial, __func__)) 1317 return -1; 1318 1319 mos7840_port = mos7840_get_port_private(port); 1320 if (mos7840_port == NULL) 1321 return -1; 1322 1323 /* try to find a free urb in the list */ 1324 urb = NULL; 1325 1326 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1327 for (i = 0; i < NUM_URBS; ++i) { 1328 if (!mos7840_port->busy[i]) { 1329 mos7840_port->busy[i] = 1; 1330 urb = mos7840_port->write_urb_pool[i]; 1331 dev_dbg(&port->dev, "URB:%d\n", i); 1332 break; 1333 } 1334 } 1335 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1336 1337 if (urb == NULL) { 1338 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); 1339 goto exit; 1340 } 1341 1342 if (urb->transfer_buffer == NULL) { 1343 urb->transfer_buffer = 1344 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); 1345 if (!urb->transfer_buffer) 1346 goto exit; 1347 } 1348 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1349 1350 memcpy(urb->transfer_buffer, current_position, transfer_size); 1351 1352 /* fill urb with data and submit */ 1353 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1354 usb_fill_bulk_urb(urb, 1355 serial->dev, 1356 usb_sndbulkpipe(serial->dev, 1357 (port->bulk_out_endpointAddress) + 2), 1358 urb->transfer_buffer, 1359 transfer_size, 1360 mos7840_bulk_out_data_callback, mos7840_port); 1361 } else { 1362 usb_fill_bulk_urb(urb, 1363 serial->dev, 1364 usb_sndbulkpipe(serial->dev, 1365 port->bulk_out_endpointAddress), 1366 urb->transfer_buffer, 1367 transfer_size, 1368 mos7840_bulk_out_data_callback, mos7840_port); 1369 } 1370 1371 data1 = urb->transfer_buffer; 1372 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); 1373 1374 if (mos7840_port->has_led) 1375 mos7840_led_activity(port); 1376 1377 /* send it down the pipe */ 1378 status = usb_submit_urb(urb, GFP_ATOMIC); 1379 1380 if (status) { 1381 mos7840_port->busy[i] = 0; 1382 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 1383 "with status = %d\n", __func__, status); 1384 bytes_sent = status; 1385 goto exit; 1386 } 1387 bytes_sent = transfer_size; 1388 port->icount.tx += transfer_size; 1389 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx); 1390 exit: 1391 return bytes_sent; 1392 1393 } 1394 1395 /***************************************************************************** 1396 * mos7840_throttle 1397 * this function is called by the tty driver when it wants to stop the data 1398 * being read from the port. 1399 *****************************************************************************/ 1400 1401 static void mos7840_throttle(struct tty_struct *tty) 1402 { 1403 struct usb_serial_port *port = tty->driver_data; 1404 struct moschip_port *mos7840_port; 1405 int status; 1406 1407 if (mos7840_port_paranoia_check(port, __func__)) 1408 return; 1409 1410 mos7840_port = mos7840_get_port_private(port); 1411 1412 if (mos7840_port == NULL) 1413 return; 1414 1415 if (!mos7840_port->open) { 1416 dev_dbg(&port->dev, "%s", "port not opened\n"); 1417 return; 1418 } 1419 1420 /* if we are implementing XON/XOFF, send the stop character */ 1421 if (I_IXOFF(tty)) { 1422 unsigned char stop_char = STOP_CHAR(tty); 1423 status = mos7840_write(tty, port, &stop_char, 1); 1424 if (status <= 0) 1425 return; 1426 } 1427 /* if we are implementing RTS/CTS, toggle that line */ 1428 if (C_CRTSCTS(tty)) { 1429 mos7840_port->shadowMCR &= ~MCR_RTS; 1430 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1431 mos7840_port->shadowMCR); 1432 if (status < 0) 1433 return; 1434 } 1435 } 1436 1437 /***************************************************************************** 1438 * mos7840_unthrottle 1439 * this function is called by the tty driver when it wants to resume 1440 * the data being read from the port (called after mos7840_throttle is 1441 * called) 1442 *****************************************************************************/ 1443 static void mos7840_unthrottle(struct tty_struct *tty) 1444 { 1445 struct usb_serial_port *port = tty->driver_data; 1446 int status; 1447 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1448 1449 if (mos7840_port_paranoia_check(port, __func__)) 1450 return; 1451 1452 if (mos7840_port == NULL) 1453 return; 1454 1455 if (!mos7840_port->open) { 1456 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1457 return; 1458 } 1459 1460 /* if we are implementing XON/XOFF, send the start character */ 1461 if (I_IXOFF(tty)) { 1462 unsigned char start_char = START_CHAR(tty); 1463 status = mos7840_write(tty, port, &start_char, 1); 1464 if (status <= 0) 1465 return; 1466 } 1467 1468 /* if we are implementing RTS/CTS, toggle that line */ 1469 if (C_CRTSCTS(tty)) { 1470 mos7840_port->shadowMCR |= MCR_RTS; 1471 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1472 mos7840_port->shadowMCR); 1473 if (status < 0) 1474 return; 1475 } 1476 } 1477 1478 static int mos7840_tiocmget(struct tty_struct *tty) 1479 { 1480 struct usb_serial_port *port = tty->driver_data; 1481 struct moschip_port *mos7840_port; 1482 unsigned int result; 1483 __u16 msr; 1484 __u16 mcr; 1485 int status; 1486 mos7840_port = mos7840_get_port_private(port); 1487 1488 if (mos7840_port == NULL) 1489 return -ENODEV; 1490 1491 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1492 if (status != 1) 1493 return -EIO; 1494 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1495 if (status != 1) 1496 return -EIO; 1497 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1498 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1499 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1500 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1501 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1502 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1503 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1504 1505 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 1506 1507 return result; 1508 } 1509 1510 static int mos7840_tiocmset(struct tty_struct *tty, 1511 unsigned int set, unsigned int clear) 1512 { 1513 struct usb_serial_port *port = tty->driver_data; 1514 struct moschip_port *mos7840_port; 1515 unsigned int mcr; 1516 int status; 1517 1518 mos7840_port = mos7840_get_port_private(port); 1519 1520 if (mos7840_port == NULL) 1521 return -ENODEV; 1522 1523 /* FIXME: What locks the port registers ? */ 1524 mcr = mos7840_port->shadowMCR; 1525 if (clear & TIOCM_RTS) 1526 mcr &= ~MCR_RTS; 1527 if (clear & TIOCM_DTR) 1528 mcr &= ~MCR_DTR; 1529 if (clear & TIOCM_LOOP) 1530 mcr &= ~MCR_LOOPBACK; 1531 1532 if (set & TIOCM_RTS) 1533 mcr |= MCR_RTS; 1534 if (set & TIOCM_DTR) 1535 mcr |= MCR_DTR; 1536 if (set & TIOCM_LOOP) 1537 mcr |= MCR_LOOPBACK; 1538 1539 mos7840_port->shadowMCR = mcr; 1540 1541 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1542 if (status < 0) { 1543 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); 1544 return status; 1545 } 1546 1547 return 0; 1548 } 1549 1550 /***************************************************************************** 1551 * mos7840_calc_baud_rate_divisor 1552 * this function calculates the proper baud rate divisor for the specified 1553 * baud rate. 1554 *****************************************************************************/ 1555 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, 1556 int baudRate, int *divisor, 1557 __u16 *clk_sel_val) 1558 { 1559 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); 1560 1561 if (baudRate <= 115200) { 1562 *divisor = 115200 / baudRate; 1563 *clk_sel_val = 0x0; 1564 } 1565 if ((baudRate > 115200) && (baudRate <= 230400)) { 1566 *divisor = 230400 / baudRate; 1567 *clk_sel_val = 0x10; 1568 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1569 *divisor = 403200 / baudRate; 1570 *clk_sel_val = 0x20; 1571 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1572 *divisor = 460800 / baudRate; 1573 *clk_sel_val = 0x30; 1574 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1575 *divisor = 806400 / baudRate; 1576 *clk_sel_val = 0x40; 1577 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1578 *divisor = 921600 / baudRate; 1579 *clk_sel_val = 0x50; 1580 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1581 *divisor = 1572864 / baudRate; 1582 *clk_sel_val = 0x60; 1583 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1584 *divisor = 3145728 / baudRate; 1585 *clk_sel_val = 0x70; 1586 } 1587 return 0; 1588 } 1589 1590 /***************************************************************************** 1591 * mos7840_send_cmd_write_baud_rate 1592 * this function sends the proper command to change the baud rate of the 1593 * specified port. 1594 *****************************************************************************/ 1595 1596 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1597 int baudRate) 1598 { 1599 int divisor = 0; 1600 int status; 1601 __u16 Data; 1602 unsigned char number; 1603 __u16 clk_sel_val; 1604 struct usb_serial_port *port; 1605 1606 if (mos7840_port == NULL) 1607 return -1; 1608 1609 port = mos7840_port->port; 1610 if (mos7840_port_paranoia_check(port, __func__)) 1611 return -1; 1612 1613 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1614 return -1; 1615 1616 number = mos7840_port->port->port_number; 1617 1618 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate); 1619 /* reset clk_uart_sel in spregOffset */ 1620 if (baudRate > 115200) { 1621 #ifdef HW_flow_control 1622 /* NOTE: need to see the pther register to modify */ 1623 /* setting h/w flow control bit to 1 */ 1624 Data = 0x2b; 1625 mos7840_port->shadowMCR = Data; 1626 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1627 Data); 1628 if (status < 0) { 1629 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1630 return -1; 1631 } 1632 #endif 1633 1634 } else { 1635 #ifdef HW_flow_control 1636 /* setting h/w flow control bit to 0 */ 1637 Data = 0xb; 1638 mos7840_port->shadowMCR = Data; 1639 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1640 Data); 1641 if (status < 0) { 1642 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1643 return -1; 1644 } 1645 #endif 1646 1647 } 1648 1649 if (1) { /* baudRate <= 115200) */ 1650 clk_sel_val = 0x0; 1651 Data = 0x0; 1652 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, 1653 &clk_sel_val); 1654 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1655 &Data); 1656 if (status < 0) { 1657 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); 1658 return -1; 1659 } 1660 Data = (Data & 0x8f) | clk_sel_val; 1661 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1662 Data); 1663 if (status < 0) { 1664 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1665 return -1; 1666 } 1667 /* Calculate the Divisor */ 1668 1669 if (status) { 1670 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1671 return status; 1672 } 1673 /* Enable access to divisor latch */ 1674 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1675 mos7840_port->shadowLCR = Data; 1676 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1677 1678 /* Write the divisor */ 1679 Data = (unsigned char)(divisor & 0xff); 1680 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); 1681 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1682 1683 Data = (unsigned char)((divisor & 0xff00) >> 8); 1684 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); 1685 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1686 1687 /* Disable access to divisor latch */ 1688 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1689 mos7840_port->shadowLCR = Data; 1690 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1691 1692 } 1693 return status; 1694 } 1695 1696 /***************************************************************************** 1697 * mos7840_change_port_settings 1698 * This routine is called to set the UART on the device to match 1699 * the specified new settings. 1700 *****************************************************************************/ 1701 1702 static void mos7840_change_port_settings(struct tty_struct *tty, 1703 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1704 { 1705 int baud; 1706 unsigned cflag; 1707 unsigned iflag; 1708 __u8 lData; 1709 __u8 lParity; 1710 __u8 lStop; 1711 int status; 1712 __u16 Data; 1713 struct usb_serial_port *port; 1714 struct usb_serial *serial; 1715 1716 if (mos7840_port == NULL) 1717 return; 1718 1719 port = mos7840_port->port; 1720 1721 if (mos7840_port_paranoia_check(port, __func__)) 1722 return; 1723 1724 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1725 return; 1726 1727 serial = port->serial; 1728 1729 if (!mos7840_port->open) { 1730 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1731 return; 1732 } 1733 1734 lData = LCR_BITS_8; 1735 lStop = LCR_STOP_1; 1736 lParity = LCR_PAR_NONE; 1737 1738 cflag = tty->termios.c_cflag; 1739 iflag = tty->termios.c_iflag; 1740 1741 /* Change the number of bits */ 1742 switch (cflag & CSIZE) { 1743 case CS5: 1744 lData = LCR_BITS_5; 1745 break; 1746 1747 case CS6: 1748 lData = LCR_BITS_6; 1749 break; 1750 1751 case CS7: 1752 lData = LCR_BITS_7; 1753 break; 1754 1755 default: 1756 case CS8: 1757 lData = LCR_BITS_8; 1758 break; 1759 } 1760 1761 /* Change the Parity bit */ 1762 if (cflag & PARENB) { 1763 if (cflag & PARODD) { 1764 lParity = LCR_PAR_ODD; 1765 dev_dbg(&port->dev, "%s - parity = odd\n", __func__); 1766 } else { 1767 lParity = LCR_PAR_EVEN; 1768 dev_dbg(&port->dev, "%s - parity = even\n", __func__); 1769 } 1770 1771 } else { 1772 dev_dbg(&port->dev, "%s - parity = none\n", __func__); 1773 } 1774 1775 if (cflag & CMSPAR) 1776 lParity = lParity | 0x20; 1777 1778 /* Change the Stop bit */ 1779 if (cflag & CSTOPB) { 1780 lStop = LCR_STOP_2; 1781 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); 1782 } else { 1783 lStop = LCR_STOP_1; 1784 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); 1785 } 1786 1787 /* Update the LCR with the correct value */ 1788 mos7840_port->shadowLCR &= 1789 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1790 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1791 1792 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, 1793 mos7840_port->shadowLCR); 1794 /* Disable Interrupts */ 1795 Data = 0x00; 1796 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1797 1798 Data = 0x00; 1799 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1800 1801 Data = 0xcf; 1802 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1803 1804 /* Send the updated LCR value to the mos7840 */ 1805 Data = mos7840_port->shadowLCR; 1806 1807 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1808 1809 Data = 0x00b; 1810 mos7840_port->shadowMCR = Data; 1811 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1812 Data = 0x00b; 1813 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1814 1815 /* set up the MCR register and send it to the mos7840 */ 1816 1817 mos7840_port->shadowMCR = MCR_MASTER_IE; 1818 if (cflag & CBAUD) 1819 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1820 1821 if (cflag & CRTSCTS) 1822 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1823 else 1824 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 1825 1826 Data = mos7840_port->shadowMCR; 1827 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1828 1829 /* Determine divisor based on baud rate */ 1830 baud = tty_get_baud_rate(tty); 1831 1832 if (!baud) { 1833 /* pick a default, any default... */ 1834 dev_dbg(&port->dev, "%s", "Picked default baud...\n"); 1835 baud = 9600; 1836 } 1837 1838 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); 1839 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 1840 1841 /* Enable Interrupts */ 1842 Data = 0x0c; 1843 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1844 1845 if (!mos7840_port->read_urb_busy) { 1846 mos7840_port->read_urb_busy = true; 1847 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1848 if (status) { 1849 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1850 status); 1851 mos7840_port->read_urb_busy = false; 1852 } 1853 } 1854 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, 1855 mos7840_port->shadowLCR); 1856 } 1857 1858 /***************************************************************************** 1859 * mos7840_set_termios 1860 * this function is called by the tty driver when it wants to change 1861 * the termios structure 1862 *****************************************************************************/ 1863 1864 static void mos7840_set_termios(struct tty_struct *tty, 1865 struct usb_serial_port *port, 1866 struct ktermios *old_termios) 1867 { 1868 int status; 1869 unsigned int cflag; 1870 struct usb_serial *serial; 1871 struct moschip_port *mos7840_port; 1872 1873 if (mos7840_port_paranoia_check(port, __func__)) 1874 return; 1875 1876 serial = port->serial; 1877 1878 if (mos7840_serial_paranoia_check(serial, __func__)) 1879 return; 1880 1881 mos7840_port = mos7840_get_port_private(port); 1882 1883 if (mos7840_port == NULL) 1884 return; 1885 1886 if (!mos7840_port->open) { 1887 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1888 return; 1889 } 1890 1891 dev_dbg(&port->dev, "%s", "setting termios - \n"); 1892 1893 cflag = tty->termios.c_cflag; 1894 1895 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, 1896 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); 1897 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, 1898 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); 1899 1900 /* change the port settings to the new ones specified */ 1901 1902 mos7840_change_port_settings(tty, mos7840_port, old_termios); 1903 1904 if (!mos7840_port->read_urb) { 1905 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n"); 1906 return; 1907 } 1908 1909 if (!mos7840_port->read_urb_busy) { 1910 mos7840_port->read_urb_busy = true; 1911 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1912 if (status) { 1913 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1914 status); 1915 mos7840_port->read_urb_busy = false; 1916 } 1917 } 1918 } 1919 1920 /***************************************************************************** 1921 * mos7840_get_lsr_info - get line status register info 1922 * 1923 * Purpose: Let user call ioctl() to get info when the UART physically 1924 * is emptied. On bus types like RS485, the transmitter must 1925 * release the bus after transmitting. This must be done when 1926 * the transmit shift register is empty, not be done when the 1927 * transmit holding register is empty. This functionality 1928 * allows an RS485 driver to be written in user space. 1929 *****************************************************************************/ 1930 1931 static int mos7840_get_lsr_info(struct tty_struct *tty, 1932 unsigned int __user *value) 1933 { 1934 int count; 1935 unsigned int result = 0; 1936 1937 count = mos7840_chars_in_buffer(tty); 1938 if (count == 0) 1939 result = TIOCSER_TEMT; 1940 1941 if (copy_to_user(value, &result, sizeof(int))) 1942 return -EFAULT; 1943 return 0; 1944 } 1945 1946 /***************************************************************************** 1947 * mos7840_get_serial_info 1948 * function to get information about serial port 1949 *****************************************************************************/ 1950 1951 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 1952 struct serial_struct __user *retinfo) 1953 { 1954 struct serial_struct tmp; 1955 1956 if (mos7840_port == NULL) 1957 return -1; 1958 1959 if (!retinfo) 1960 return -EFAULT; 1961 1962 memset(&tmp, 0, sizeof(tmp)); 1963 1964 tmp.type = PORT_16550A; 1965 tmp.line = mos7840_port->port->minor; 1966 tmp.port = mos7840_port->port->port_number; 1967 tmp.irq = 0; 1968 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 1969 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 1970 tmp.baud_base = 9600; 1971 tmp.close_delay = 5 * HZ; 1972 tmp.closing_wait = 30 * HZ; 1973 1974 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1975 return -EFAULT; 1976 return 0; 1977 } 1978 1979 /***************************************************************************** 1980 * SerialIoctl 1981 * this function handles any ioctl calls to the driver 1982 *****************************************************************************/ 1983 1984 static int mos7840_ioctl(struct tty_struct *tty, 1985 unsigned int cmd, unsigned long arg) 1986 { 1987 struct usb_serial_port *port = tty->driver_data; 1988 void __user *argp = (void __user *)arg; 1989 struct moschip_port *mos7840_port; 1990 1991 if (mos7840_port_paranoia_check(port, __func__)) 1992 return -1; 1993 1994 mos7840_port = mos7840_get_port_private(port); 1995 1996 if (mos7840_port == NULL) 1997 return -1; 1998 1999 switch (cmd) { 2000 /* return number of bytes available */ 2001 2002 case TIOCSERGETLSR: 2003 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 2004 return mos7840_get_lsr_info(tty, argp); 2005 2006 case TIOCGSERIAL: 2007 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); 2008 return mos7840_get_serial_info(mos7840_port, argp); 2009 2010 case TIOCSSERIAL: 2011 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__); 2012 break; 2013 default: 2014 break; 2015 } 2016 return -ENOIOCTLCMD; 2017 } 2018 2019 static int mos7810_check(struct usb_serial *serial) 2020 { 2021 int i, pass_count = 0; 2022 u8 *buf; 2023 __u16 data = 0, mcr_data = 0; 2024 __u16 test_pattern = 0x55AA; 2025 int res; 2026 2027 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2028 if (!buf) 2029 return 0; /* failed to identify 7810 */ 2030 2031 /* Store MCR setting */ 2032 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2033 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, 2034 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2035 if (res == VENDOR_READ_LENGTH) 2036 mcr_data = *buf; 2037 2038 for (i = 0; i < 16; i++) { 2039 /* Send the 1-bit test pattern out to MCS7810 test pin */ 2040 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2041 MCS_WRREQ, MCS_WR_RTYPE, 2042 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), 2043 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); 2044 2045 /* Read the test pattern back */ 2046 res = usb_control_msg(serial->dev, 2047 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, 2048 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2049 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2050 if (res == VENDOR_READ_LENGTH) 2051 data = *buf; 2052 2053 /* If this is a MCS7810 device, both test patterns must match */ 2054 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) 2055 break; 2056 2057 pass_count++; 2058 } 2059 2060 /* Restore MCR setting */ 2061 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, 2062 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 2063 0, MOS_WDR_TIMEOUT); 2064 2065 kfree(buf); 2066 2067 if (pass_count == 16) 2068 return 1; 2069 2070 return 0; 2071 } 2072 2073 static int mos7840_probe(struct usb_serial *serial, 2074 const struct usb_device_id *id) 2075 { 2076 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); 2077 u8 *buf; 2078 int device_type; 2079 2080 if (product == MOSCHIP_DEVICE_ID_7810 || 2081 product == MOSCHIP_DEVICE_ID_7820) { 2082 device_type = product; 2083 goto out; 2084 } 2085 2086 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2087 if (!buf) 2088 return -ENOMEM; 2089 2090 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2091 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2092 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2093 2094 /* For a MCS7840 device GPIO0 must be set to 1 */ 2095 if (buf[0] & 0x01) 2096 device_type = MOSCHIP_DEVICE_ID_7840; 2097 else if (mos7810_check(serial)) 2098 device_type = MOSCHIP_DEVICE_ID_7810; 2099 else 2100 device_type = MOSCHIP_DEVICE_ID_7820; 2101 2102 kfree(buf); 2103 out: 2104 usb_set_serial_data(serial, (void *)(unsigned long)device_type); 2105 2106 return 0; 2107 } 2108 2109 static int mos7840_calc_num_ports(struct usb_serial *serial) 2110 { 2111 int device_type = (unsigned long)usb_get_serial_data(serial); 2112 int mos7840_num_ports; 2113 2114 mos7840_num_ports = (device_type >> 4) & 0x000F; 2115 2116 return mos7840_num_ports; 2117 } 2118 2119 static int mos7840_port_probe(struct usb_serial_port *port) 2120 { 2121 struct usb_serial *serial = port->serial; 2122 int device_type = (unsigned long)usb_get_serial_data(serial); 2123 struct moschip_port *mos7840_port; 2124 int status; 2125 int pnum; 2126 __u16 Data; 2127 2128 /* we set up the pointers to the endpoints in the mos7840_open * 2129 * function, as the structures aren't created yet. */ 2130 2131 pnum = port->port_number; 2132 2133 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); 2134 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2135 if (!mos7840_port) 2136 return -ENOMEM; 2137 2138 /* Initialize all port interrupt end point to port 0 int 2139 * endpoint. Our device has only one interrupt end point 2140 * common to all port */ 2141 2142 mos7840_port->port = port; 2143 mos7840_set_port_private(port, mos7840_port); 2144 spin_lock_init(&mos7840_port->pool_lock); 2145 2146 /* minor is not initialised until later by 2147 * usb-serial.c:get_free_serial() and cannot therefore be used 2148 * to index device instances */ 2149 mos7840_port->port_num = pnum + 1; 2150 dev_dbg(&port->dev, "port->minor = %d\n", port->minor); 2151 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); 2152 2153 if (mos7840_port->port_num == 1) { 2154 mos7840_port->SpRegOffset = 0x0; 2155 mos7840_port->ControlRegOffset = 0x1; 2156 mos7840_port->DcrRegOffset = 0x4; 2157 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) { 2158 mos7840_port->SpRegOffset = 0x8; 2159 mos7840_port->ControlRegOffset = 0x9; 2160 mos7840_port->DcrRegOffset = 0x16; 2161 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) { 2162 mos7840_port->SpRegOffset = 0xa; 2163 mos7840_port->ControlRegOffset = 0xb; 2164 mos7840_port->DcrRegOffset = 0x19; 2165 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) { 2166 mos7840_port->SpRegOffset = 0xa; 2167 mos7840_port->ControlRegOffset = 0xb; 2168 mos7840_port->DcrRegOffset = 0x19; 2169 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) { 2170 mos7840_port->SpRegOffset = 0xc; 2171 mos7840_port->ControlRegOffset = 0xd; 2172 mos7840_port->DcrRegOffset = 0x1c; 2173 } 2174 mos7840_dump_serial_port(port, mos7840_port); 2175 mos7840_set_port_private(port, mos7840_port); 2176 2177 /* enable rx_disable bit in control register */ 2178 status = mos7840_get_reg_sync(port, 2179 mos7840_port->ControlRegOffset, &Data); 2180 if (status < 0) { 2181 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); 2182 goto out; 2183 } else 2184 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); 2185 Data |= 0x08; /* setting driver done bit */ 2186 Data |= 0x04; /* sp1_bit to have cts change reflect in 2187 modem status reg */ 2188 2189 /* Data |= 0x20; //rx_disable bit */ 2190 status = mos7840_set_reg_sync(port, 2191 mos7840_port->ControlRegOffset, Data); 2192 if (status < 0) { 2193 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2194 goto out; 2195 } else 2196 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); 2197 2198 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2199 and 0x24 in DCR3 */ 2200 Data = 0x01; 2201 status = mos7840_set_reg_sync(port, 2202 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2203 if (status < 0) { 2204 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); 2205 goto out; 2206 } else 2207 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); 2208 2209 Data = 0x05; 2210 status = mos7840_set_reg_sync(port, 2211 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2212 if (status < 0) { 2213 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); 2214 goto out; 2215 } else 2216 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); 2217 2218 Data = 0x24; 2219 status = mos7840_set_reg_sync(port, 2220 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2221 if (status < 0) { 2222 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); 2223 goto out; 2224 } else 2225 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); 2226 2227 /* write values in clkstart0x0 and clkmulti 0x20 */ 2228 Data = 0x0; 2229 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); 2230 if (status < 0) { 2231 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2232 goto out; 2233 } else 2234 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2235 2236 Data = 0x20; 2237 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); 2238 if (status < 0) { 2239 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); 2240 goto error; 2241 } else 2242 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); 2243 2244 /* write value 0x0 to scratchpad register */ 2245 Data = 0x00; 2246 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); 2247 if (status < 0) { 2248 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); 2249 goto out; 2250 } else 2251 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); 2252 2253 /* Zero Length flag register */ 2254 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { 2255 Data = 0xff; 2256 status = mos7840_set_reg_sync(port, 2257 (__u16) (ZLP_REG1 + 2258 ((__u16)mos7840_port->port_num)), Data); 2259 dev_dbg(&port->dev, "ZLIP offset %x\n", 2260 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); 2261 if (status < 0) { 2262 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); 2263 goto out; 2264 } else 2265 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); 2266 } else { 2267 Data = 0xff; 2268 status = mos7840_set_reg_sync(port, 2269 (__u16) (ZLP_REG1 + 2270 ((__u16)mos7840_port->port_num) - 0x1), Data); 2271 dev_dbg(&port->dev, "ZLIP offset %x\n", 2272 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); 2273 if (status < 0) { 2274 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); 2275 goto out; 2276 } else 2277 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); 2278 2279 } 2280 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2281 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2282 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2283 GFP_KERNEL); 2284 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2285 !mos7840_port->dr) { 2286 status = -ENOMEM; 2287 goto error; 2288 } 2289 2290 mos7840_port->has_led = false; 2291 2292 /* Initialize LED timers */ 2293 if (device_type == MOSCHIP_DEVICE_ID_7810) { 2294 mos7840_port->has_led = true; 2295 2296 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL); 2297 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr), 2298 GFP_KERNEL); 2299 if (!mos7840_port->led_urb || !mos7840_port->led_dr) { 2300 status = -ENOMEM; 2301 goto error; 2302 } 2303 2304 setup_timer(&mos7840_port->led_timer1, mos7840_led_off, 2305 (unsigned long)mos7840_port); 2306 mos7840_port->led_timer1.expires = 2307 jiffies + msecs_to_jiffies(LED_ON_MS); 2308 setup_timer(&mos7840_port->led_timer2, mos7840_led_flag_off, 2309 (unsigned long)mos7840_port); 2310 mos7840_port->led_timer2.expires = 2311 jiffies + msecs_to_jiffies(LED_OFF_MS); 2312 2313 /* Turn off LED */ 2314 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2315 } 2316 out: 2317 if (pnum == serial->num_ports - 1) { 2318 /* Zero Length flag enable */ 2319 Data = 0x0f; 2320 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2321 if (status < 0) { 2322 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status); 2323 goto error; 2324 } else 2325 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status); 2326 2327 /* setting configuration feature to one */ 2328 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2329 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 2330 MOS_WDR_TIMEOUT); 2331 } 2332 return 0; 2333 error: 2334 kfree(mos7840_port->led_dr); 2335 usb_free_urb(mos7840_port->led_urb); 2336 kfree(mos7840_port->dr); 2337 kfree(mos7840_port->ctrl_buf); 2338 usb_free_urb(mos7840_port->control_urb); 2339 kfree(mos7840_port); 2340 2341 return status; 2342 } 2343 2344 static int mos7840_port_remove(struct usb_serial_port *port) 2345 { 2346 struct moschip_port *mos7840_port; 2347 2348 mos7840_port = mos7840_get_port_private(port); 2349 2350 if (mos7840_port->has_led) { 2351 /* Turn off LED */ 2352 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2353 2354 del_timer_sync(&mos7840_port->led_timer1); 2355 del_timer_sync(&mos7840_port->led_timer2); 2356 2357 usb_kill_urb(mos7840_port->led_urb); 2358 usb_free_urb(mos7840_port->led_urb); 2359 kfree(mos7840_port->led_dr); 2360 } 2361 usb_kill_urb(mos7840_port->control_urb); 2362 usb_free_urb(mos7840_port->control_urb); 2363 kfree(mos7840_port->ctrl_buf); 2364 kfree(mos7840_port->dr); 2365 kfree(mos7840_port); 2366 2367 return 0; 2368 } 2369 2370 static struct usb_serial_driver moschip7840_4port_device = { 2371 .driver = { 2372 .owner = THIS_MODULE, 2373 .name = "mos7840", 2374 }, 2375 .description = DRIVER_DESC, 2376 .id_table = id_table, 2377 .num_ports = 4, 2378 .open = mos7840_open, 2379 .close = mos7840_close, 2380 .write = mos7840_write, 2381 .write_room = mos7840_write_room, 2382 .chars_in_buffer = mos7840_chars_in_buffer, 2383 .throttle = mos7840_throttle, 2384 .unthrottle = mos7840_unthrottle, 2385 .calc_num_ports = mos7840_calc_num_ports, 2386 .probe = mos7840_probe, 2387 .ioctl = mos7840_ioctl, 2388 .set_termios = mos7840_set_termios, 2389 .break_ctl = mos7840_break, 2390 .tiocmget = mos7840_tiocmget, 2391 .tiocmset = mos7840_tiocmset, 2392 .tiocmiwait = usb_serial_generic_tiocmiwait, 2393 .get_icount = usb_serial_generic_get_icount, 2394 .port_probe = mos7840_port_probe, 2395 .port_remove = mos7840_port_remove, 2396 .read_bulk_callback = mos7840_bulk_in_callback, 2397 .read_int_callback = mos7840_interrupt_callback, 2398 }; 2399 2400 static struct usb_serial_driver * const serial_drivers[] = { 2401 &moschip7840_4port_device, NULL 2402 }; 2403 2404 module_usb_serial_driver(serial_drivers, id_table); 2405 2406 MODULE_DESCRIPTION(DRIVER_DESC); 2407 MODULE_LICENSE("GPL"); 2408