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 *read_urb; /* read URB for this port */ 218 __u8 shadowLCR; /* last LCR value received */ 219 __u8 shadowMCR; /* last MCR value received */ 220 char open; 221 char open_ports; 222 struct usb_serial_port *port; /* loop back to the owner of this object */ 223 224 /* Offsets */ 225 __u8 SpRegOffset; 226 __u8 ControlRegOffset; 227 __u8 DcrRegOffset; 228 /* for processing control URBS in interrupt context */ 229 struct urb *control_urb; 230 struct usb_ctrlrequest *dr; 231 char *ctrl_buf; 232 int MsrLsr; 233 234 spinlock_t pool_lock; 235 struct urb *write_urb_pool[NUM_URBS]; 236 char busy[NUM_URBS]; 237 bool read_urb_busy; 238 239 /* For device(s) with LED indicator */ 240 bool has_led; 241 struct timer_list led_timer1; /* Timer for LED on */ 242 struct timer_list led_timer2; /* Timer for LED off */ 243 struct urb *led_urb; 244 struct usb_ctrlrequest *led_dr; 245 246 unsigned long flags; 247 }; 248 249 /* 250 * mos7840_set_reg_sync 251 * To set the Control register by calling usb_fill_control_urb function 252 * by passing usb_sndctrlpipe function as parameter. 253 */ 254 255 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 256 __u16 val) 257 { 258 struct usb_device *dev = port->serial->dev; 259 val = val & 0x00ff; 260 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val); 261 262 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 263 MCS_WR_RTYPE, val, reg, NULL, 0, 264 MOS_WDR_TIMEOUT); 265 } 266 267 /* 268 * mos7840_get_reg_sync 269 * To set the Uart register by calling usb_fill_control_urb function by 270 * passing usb_rcvctrlpipe function as parameter. 271 */ 272 273 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 274 __u16 *val) 275 { 276 struct usb_device *dev = port->serial->dev; 277 int ret = 0; 278 u8 *buf; 279 280 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 281 if (!buf) 282 return -ENOMEM; 283 284 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 285 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, 286 MOS_WDR_TIMEOUT); 287 if (ret < VENDOR_READ_LENGTH) { 288 if (ret >= 0) 289 ret = -EIO; 290 goto out; 291 } 292 293 *val = buf[0]; 294 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val); 295 out: 296 kfree(buf); 297 return ret; 298 } 299 300 /* 301 * mos7840_set_uart_reg 302 * To set the Uart register by calling usb_fill_control_urb function by 303 * passing usb_sndctrlpipe function as parameter. 304 */ 305 306 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 307 __u16 val) 308 { 309 310 struct usb_device *dev = port->serial->dev; 311 val = val & 0x00ff; 312 /* For the UART control registers, the application number need 313 to be Or'ed */ 314 if (port->serial->num_ports == 4) { 315 val |= ((__u16)port->port_number + 1) << 8; 316 } else { 317 if (port->port_number == 0) { 318 val |= ((__u16)port->port_number + 1) << 8; 319 } else { 320 val |= ((__u16)port->port_number + 2) << 8; 321 } 322 } 323 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val); 324 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 325 MCS_WR_RTYPE, val, reg, NULL, 0, 326 MOS_WDR_TIMEOUT); 327 328 } 329 330 /* 331 * mos7840_get_uart_reg 332 * To set the Control register by calling usb_fill_control_urb function 333 * by passing usb_rcvctrlpipe function as parameter. 334 */ 335 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 336 __u16 *val) 337 { 338 struct usb_device *dev = port->serial->dev; 339 int ret = 0; 340 __u16 Wval; 341 u8 *buf; 342 343 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 344 if (!buf) 345 return -ENOMEM; 346 347 /* Wval is same as application number */ 348 if (port->serial->num_ports == 4) { 349 Wval = ((__u16)port->port_number + 1) << 8; 350 } else { 351 if (port->port_number == 0) { 352 Wval = ((__u16)port->port_number + 1) << 8; 353 } else { 354 Wval = ((__u16)port->port_number + 2) << 8; 355 } 356 } 357 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval); 358 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 359 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, 360 MOS_WDR_TIMEOUT); 361 if (ret < VENDOR_READ_LENGTH) { 362 if (ret >= 0) 363 ret = -EIO; 364 goto out; 365 } 366 *val = buf[0]; 367 out: 368 kfree(buf); 369 return ret; 370 } 371 372 static void mos7840_dump_serial_port(struct usb_serial_port *port, 373 struct moschip_port *mos7840_port) 374 { 375 376 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 377 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset); 378 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset); 379 380 } 381 382 /************************************************************************/ 383 /************************************************************************/ 384 /* I N T E R F A C E F U N C T I O N S */ 385 /* I N T E R F A C E F U N C T I O N S */ 386 /************************************************************************/ 387 /************************************************************************/ 388 389 static inline void mos7840_set_port_private(struct usb_serial_port *port, 390 struct moschip_port *data) 391 { 392 usb_set_serial_port_data(port, (void *)data); 393 } 394 395 static inline struct moschip_port *mos7840_get_port_private(struct 396 usb_serial_port 397 *port) 398 { 399 return (struct moschip_port *)usb_get_serial_port_data(port); 400 } 401 402 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 403 { 404 struct moschip_port *mos7840_port; 405 struct async_icount *icount; 406 mos7840_port = port; 407 if (new_msr & 408 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 409 MOS_MSR_DELTA_CD)) { 410 icount = &mos7840_port->port->icount; 411 412 /* update input line counters */ 413 if (new_msr & MOS_MSR_DELTA_CTS) 414 icount->cts++; 415 if (new_msr & MOS_MSR_DELTA_DSR) 416 icount->dsr++; 417 if (new_msr & MOS_MSR_DELTA_CD) 418 icount->dcd++; 419 if (new_msr & MOS_MSR_DELTA_RI) 420 icount->rng++; 421 422 wake_up_interruptible(&port->port->port.delta_msr_wait); 423 } 424 } 425 426 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 427 { 428 struct async_icount *icount; 429 430 if (new_lsr & SERIAL_LSR_BI) { 431 /* 432 * Parity and Framing errors only count if they 433 * occur exclusive of a break being 434 * received. 435 */ 436 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 437 } 438 439 /* update input line counters */ 440 icount = &port->port->icount; 441 if (new_lsr & SERIAL_LSR_BI) 442 icount->brk++; 443 if (new_lsr & SERIAL_LSR_OE) 444 icount->overrun++; 445 if (new_lsr & SERIAL_LSR_PE) 446 icount->parity++; 447 if (new_lsr & SERIAL_LSR_FE) 448 icount->frame++; 449 } 450 451 /************************************************************************/ 452 /************************************************************************/ 453 /* U S B C A L L B A C K F U N C T I O N S */ 454 /* U S B C A L L B A C K F U N C T I O N S */ 455 /************************************************************************/ 456 /************************************************************************/ 457 458 static void mos7840_control_callback(struct urb *urb) 459 { 460 unsigned char *data; 461 struct moschip_port *mos7840_port; 462 struct device *dev = &urb->dev->dev; 463 __u8 regval = 0x0; 464 int status = urb->status; 465 466 mos7840_port = urb->context; 467 468 switch (status) { 469 case 0: 470 /* success */ 471 break; 472 case -ECONNRESET: 473 case -ENOENT: 474 case -ESHUTDOWN: 475 /* this urb is terminated, clean up */ 476 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); 477 goto out; 478 default: 479 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); 480 goto out; 481 } 482 483 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length); 484 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__, 485 mos7840_port->MsrLsr, mos7840_port->port_num); 486 data = urb->transfer_buffer; 487 regval = (__u8) data[0]; 488 dev_dbg(dev, "%s data is %x\n", __func__, regval); 489 if (mos7840_port->MsrLsr == 0) 490 mos7840_handle_new_msr(mos7840_port, regval); 491 else if (mos7840_port->MsrLsr == 1) 492 mos7840_handle_new_lsr(mos7840_port, regval); 493 out: 494 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags); 495 } 496 497 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 498 __u16 *val) 499 { 500 struct usb_device *dev = mcs->port->serial->dev; 501 struct usb_ctrlrequest *dr = mcs->dr; 502 unsigned char *buffer = mcs->ctrl_buf; 503 int ret; 504 505 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags)) 506 return -EBUSY; 507 508 dr->bRequestType = MCS_RD_RTYPE; 509 dr->bRequest = MCS_RDREQ; 510 dr->wValue = cpu_to_le16(Wval); /* 0 */ 511 dr->wIndex = cpu_to_le16(reg); 512 dr->wLength = cpu_to_le16(2); 513 514 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0), 515 (unsigned char *)dr, buffer, 2, 516 mos7840_control_callback, mcs); 517 mcs->control_urb->transfer_buffer_length = 2; 518 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC); 519 if (ret) 520 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags); 521 522 return ret; 523 } 524 525 static void mos7840_set_led_callback(struct urb *urb) 526 { 527 switch (urb->status) { 528 case 0: 529 /* Success */ 530 break; 531 case -ECONNRESET: 532 case -ENOENT: 533 case -ESHUTDOWN: 534 /* This urb is terminated, clean up */ 535 dev_dbg(&urb->dev->dev, "%s - urb shutting down: %d\n", 536 __func__, urb->status); 537 break; 538 default: 539 dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n", 540 __func__, urb->status); 541 } 542 } 543 544 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, 545 __u16 reg) 546 { 547 struct usb_device *dev = mcs->port->serial->dev; 548 struct usb_ctrlrequest *dr = mcs->led_dr; 549 550 dr->bRequestType = MCS_WR_RTYPE; 551 dr->bRequest = MCS_WRREQ; 552 dr->wValue = cpu_to_le16(wval); 553 dr->wIndex = cpu_to_le16(reg); 554 dr->wLength = cpu_to_le16(0); 555 556 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0), 557 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL); 558 559 usb_submit_urb(mcs->led_urb, GFP_ATOMIC); 560 } 561 562 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, 563 __u16 val) 564 { 565 struct usb_device *dev = port->serial->dev; 566 567 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, 568 val, reg, NULL, 0, MOS_WDR_TIMEOUT); 569 } 570 571 static void mos7840_led_off(unsigned long arg) 572 { 573 struct moschip_port *mcs = (struct moschip_port *) arg; 574 575 /* Turn off LED */ 576 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER); 577 mod_timer(&mcs->led_timer2, 578 jiffies + msecs_to_jiffies(LED_OFF_MS)); 579 } 580 581 static void mos7840_led_flag_off(unsigned long arg) 582 { 583 struct moschip_port *mcs = (struct moschip_port *) arg; 584 585 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags); 586 } 587 588 static void mos7840_led_activity(struct usb_serial_port *port) 589 { 590 struct moschip_port *mos7840_port = usb_get_serial_port_data(port); 591 592 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags)) 593 return; 594 595 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER); 596 mod_timer(&mos7840_port->led_timer1, 597 jiffies + msecs_to_jiffies(LED_ON_MS)); 598 } 599 600 /***************************************************************************** 601 * mos7840_interrupt_callback 602 * this is the callback function for when we have received data on the 603 * interrupt endpoint. 604 *****************************************************************************/ 605 606 static void mos7840_interrupt_callback(struct urb *urb) 607 { 608 int result; 609 int length; 610 struct moschip_port *mos7840_port; 611 struct usb_serial *serial; 612 __u16 Data; 613 unsigned char *data; 614 __u8 sp[5], st; 615 int i, rv = 0; 616 __u16 wval, wreg = 0; 617 int status = urb->status; 618 619 switch (status) { 620 case 0: 621 /* success */ 622 break; 623 case -ECONNRESET: 624 case -ENOENT: 625 case -ESHUTDOWN: 626 /* this urb is terminated, clean up */ 627 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 628 __func__, status); 629 return; 630 default: 631 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", 632 __func__, status); 633 goto exit; 634 } 635 636 length = urb->actual_length; 637 data = urb->transfer_buffer; 638 639 serial = urb->context; 640 641 /* Moschip get 5 bytes 642 * Byte 1 IIR Port 1 (port.number is 0) 643 * Byte 2 IIR Port 2 (port.number is 1) 644 * Byte 3 IIR Port 3 (port.number is 2) 645 * Byte 4 IIR Port 4 (port.number is 3) 646 * Byte 5 FIFO status for both */ 647 648 if (length > 5) { 649 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n"); 650 return; 651 } 652 653 sp[0] = (__u8) data[0]; 654 sp[1] = (__u8) data[1]; 655 sp[2] = (__u8) data[2]; 656 sp[3] = (__u8) data[3]; 657 st = (__u8) data[4]; 658 659 for (i = 0; i < serial->num_ports; i++) { 660 mos7840_port = mos7840_get_port_private(serial->port[i]); 661 wval = ((__u16)serial->port[i]->port_number + 1) << 8; 662 if (mos7840_port->open) { 663 if (sp[i] & 0x01) { 664 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i); 665 } else { 666 switch (sp[i] & 0x0f) { 667 case SERIAL_IIR_RLS: 668 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i); 669 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n"); 670 mos7840_port->MsrLsr = 1; 671 wreg = LINE_STATUS_REGISTER; 672 break; 673 case SERIAL_IIR_MS: 674 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i); 675 mos7840_port->MsrLsr = 0; 676 wreg = MODEM_STATUS_REGISTER; 677 break; 678 } 679 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data); 680 } 681 } 682 } 683 if (!(rv < 0)) 684 /* the completion handler for the control urb will resubmit */ 685 return; 686 exit: 687 result = usb_submit_urb(urb, GFP_ATOMIC); 688 if (result) { 689 dev_err(&urb->dev->dev, 690 "%s - Error %d submitting interrupt urb\n", 691 __func__, result); 692 } 693 } 694 695 static int mos7840_port_paranoia_check(struct usb_serial_port *port, 696 const char *function) 697 { 698 if (!port) { 699 pr_debug("%s - port == NULL\n", function); 700 return -1; 701 } 702 if (!port->serial) { 703 pr_debug("%s - port->serial == NULL\n", function); 704 return -1; 705 } 706 707 return 0; 708 } 709 710 /* Inline functions to check the sanity of a pointer that is passed to us */ 711 static int mos7840_serial_paranoia_check(struct usb_serial *serial, 712 const char *function) 713 { 714 if (!serial) { 715 pr_debug("%s - serial == NULL\n", function); 716 return -1; 717 } 718 if (!serial->type) { 719 pr_debug("%s - serial->type == NULL!\n", function); 720 return -1; 721 } 722 723 return 0; 724 } 725 726 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port, 727 const char *function) 728 { 729 /* if no port was specified, or it fails a paranoia check */ 730 if (!port || 731 mos7840_port_paranoia_check(port, function) || 732 mos7840_serial_paranoia_check(port->serial, function)) { 733 /* then say that we don't have a valid usb_serial thing, 734 * which will end up genrating -ENODEV return values */ 735 return NULL; 736 } 737 738 return port->serial; 739 } 740 741 /***************************************************************************** 742 * mos7840_bulk_in_callback 743 * this is the callback function for when we have received data on the 744 * bulk in endpoint. 745 *****************************************************************************/ 746 747 static void mos7840_bulk_in_callback(struct urb *urb) 748 { 749 int retval; 750 unsigned char *data; 751 struct usb_serial *serial; 752 struct usb_serial_port *port; 753 struct moschip_port *mos7840_port; 754 int status = urb->status; 755 756 mos7840_port = urb->context; 757 if (!mos7840_port) 758 return; 759 760 if (status) { 761 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); 762 mos7840_port->read_urb_busy = false; 763 return; 764 } 765 766 port = mos7840_port->port; 767 if (mos7840_port_paranoia_check(port, __func__)) { 768 mos7840_port->read_urb_busy = false; 769 return; 770 } 771 772 serial = mos7840_get_usb_serial(port, __func__); 773 if (!serial) { 774 mos7840_port->read_urb_busy = false; 775 return; 776 } 777 778 data = urb->transfer_buffer; 779 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); 780 781 if (urb->actual_length) { 782 struct tty_port *tport = &mos7840_port->port->port; 783 tty_insert_flip_string(tport, data, urb->actual_length); 784 tty_flip_buffer_push(tport); 785 port->icount.rx += urb->actual_length; 786 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx); 787 } 788 789 if (!mos7840_port->read_urb) { 790 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n"); 791 mos7840_port->read_urb_busy = false; 792 return; 793 } 794 795 if (mos7840_port->has_led) 796 mos7840_led_activity(port); 797 798 mos7840_port->read_urb_busy = true; 799 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); 800 801 if (retval) { 802 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); 803 mos7840_port->read_urb_busy = false; 804 } 805 } 806 807 /***************************************************************************** 808 * mos7840_bulk_out_data_callback 809 * this is the callback function for when we have finished sending 810 * serial data on the bulk out endpoint. 811 *****************************************************************************/ 812 813 static void mos7840_bulk_out_data_callback(struct urb *urb) 814 { 815 struct moschip_port *mos7840_port; 816 struct usb_serial_port *port; 817 int status = urb->status; 818 int i; 819 820 mos7840_port = urb->context; 821 port = mos7840_port->port; 822 spin_lock(&mos7840_port->pool_lock); 823 for (i = 0; i < NUM_URBS; i++) { 824 if (urb == mos7840_port->write_urb_pool[i]) { 825 mos7840_port->busy[i] = 0; 826 break; 827 } 828 } 829 spin_unlock(&mos7840_port->pool_lock); 830 831 if (status) { 832 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status); 833 return; 834 } 835 836 if (mos7840_port_paranoia_check(port, __func__)) 837 return; 838 839 if (mos7840_port->open) 840 tty_port_tty_wakeup(&port->port); 841 842 } 843 844 /************************************************************************/ 845 /* 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 */ 846 /************************************************************************/ 847 848 /***************************************************************************** 849 * mos7840_open 850 * this function is called by the tty driver when a port is opened 851 * If successful, we return 0 852 * Otherwise we return a negative error number. 853 *****************************************************************************/ 854 855 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) 856 { 857 int response; 858 int j; 859 struct usb_serial *serial; 860 struct urb *urb; 861 __u16 Data; 862 int status; 863 struct moschip_port *mos7840_port; 864 struct moschip_port *port0; 865 866 if (mos7840_port_paranoia_check(port, __func__)) 867 return -ENODEV; 868 869 serial = port->serial; 870 871 if (mos7840_serial_paranoia_check(serial, __func__)) 872 return -ENODEV; 873 874 mos7840_port = mos7840_get_port_private(port); 875 port0 = mos7840_get_port_private(serial->port[0]); 876 877 if (mos7840_port == NULL || port0 == NULL) 878 return -ENODEV; 879 880 usb_clear_halt(serial->dev, port->write_urb->pipe); 881 usb_clear_halt(serial->dev, port->read_urb->pipe); 882 port0->open_ports++; 883 884 /* Initialising the write urb pool */ 885 for (j = 0; j < NUM_URBS; ++j) { 886 urb = usb_alloc_urb(0, GFP_KERNEL); 887 mos7840_port->write_urb_pool[j] = urb; 888 if (!urb) 889 continue; 890 891 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 892 GFP_KERNEL); 893 if (!urb->transfer_buffer) { 894 usb_free_urb(urb); 895 mos7840_port->write_urb_pool[j] = NULL; 896 continue; 897 } 898 } 899 900 /***************************************************************************** 901 * Initialize MCS7840 -- Write Init values to corresponding Registers 902 * 903 * Register Index 904 * 1 : IER 905 * 2 : FCR 906 * 3 : LCR 907 * 4 : MCR 908 * 909 * 0x08 : SP1/2 Control Reg 910 *****************************************************************************/ 911 912 /* NEED to check the following Block */ 913 914 Data = 0x0; 915 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 916 if (status < 0) { 917 dev_dbg(&port->dev, "Reading Spreg failed\n"); 918 goto err; 919 } 920 Data |= 0x80; 921 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 922 if (status < 0) { 923 dev_dbg(&port->dev, "writing Spreg failed\n"); 924 goto err; 925 } 926 927 Data &= ~0x80; 928 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 929 if (status < 0) { 930 dev_dbg(&port->dev, "writing Spreg failed\n"); 931 goto err; 932 } 933 /* End of block to be checked */ 934 935 Data = 0x0; 936 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 937 &Data); 938 if (status < 0) { 939 dev_dbg(&port->dev, "Reading Controlreg failed\n"); 940 goto err; 941 } 942 Data |= 0x08; /* Driver done bit */ 943 Data |= 0x20; /* rx_disable */ 944 status = mos7840_set_reg_sync(port, 945 mos7840_port->ControlRegOffset, Data); 946 if (status < 0) { 947 dev_dbg(&port->dev, "writing Controlreg failed\n"); 948 goto err; 949 } 950 /* do register settings here */ 951 /* Set all regs to the device default values. */ 952 /*********************************** 953 * First Disable all interrupts. 954 ***********************************/ 955 Data = 0x00; 956 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 957 if (status < 0) { 958 dev_dbg(&port->dev, "disabling interrupts failed\n"); 959 goto err; 960 } 961 /* Set FIFO_CONTROL_REGISTER to the default value */ 962 Data = 0x00; 963 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 964 if (status < 0) { 965 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 966 goto err; 967 } 968 969 Data = 0xcf; 970 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 971 if (status < 0) { 972 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); 973 goto err; 974 } 975 976 Data = 0x03; 977 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 978 mos7840_port->shadowLCR = Data; 979 980 Data = 0x0b; 981 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 982 mos7840_port->shadowMCR = Data; 983 984 Data = 0x00; 985 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 986 mos7840_port->shadowLCR = Data; 987 988 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ 989 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 990 991 Data = 0x0c; 992 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 993 994 Data = 0x0; 995 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 996 997 Data = 0x00; 998 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); 999 1000 Data = Data & ~SERIAL_LCR_DLAB; 1001 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1002 mos7840_port->shadowLCR = Data; 1003 1004 /* clearing Bulkin and Bulkout Fifo */ 1005 Data = 0x0; 1006 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); 1007 1008 Data = Data | 0x0c; 1009 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1010 1011 Data = Data & ~0x0c; 1012 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); 1013 /* Finally enable all interrupts */ 1014 Data = 0x0c; 1015 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1016 1017 /* clearing rx_disable */ 1018 Data = 0x0; 1019 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1020 &Data); 1021 Data = Data & ~0x20; 1022 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1023 Data); 1024 1025 /* rx_negate */ 1026 Data = 0x0; 1027 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, 1028 &Data); 1029 Data = Data | 0x10; 1030 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, 1031 Data); 1032 1033 /* Check to see if we've set up our endpoint info yet * 1034 * (can't set it up in mos7840_startup as the structures * 1035 * were not set up at that time.) */ 1036 if (port0->open_ports == 1) { 1037 /* FIXME: Buffer never NULL, so URB is not submitted. */ 1038 if (serial->port[0]->interrupt_in_buffer == NULL) { 1039 /* set up interrupt urb */ 1040 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1041 serial->dev, 1042 usb_rcvintpipe(serial->dev, 1043 serial->port[0]->interrupt_in_endpointAddress), 1044 serial->port[0]->interrupt_in_buffer, 1045 serial->port[0]->interrupt_in_urb-> 1046 transfer_buffer_length, 1047 mos7840_interrupt_callback, 1048 serial, 1049 serial->port[0]->interrupt_in_urb->interval); 1050 1051 /* start interrupt read for mos7840 */ 1052 response = 1053 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1054 GFP_KERNEL); 1055 if (response) { 1056 dev_err(&port->dev, "%s - Error %d submitting " 1057 "interrupt urb\n", __func__, response); 1058 } 1059 1060 } 1061 1062 } 1063 1064 /* see if we've set up our endpoint info yet * 1065 * (can't set it up in mos7840_startup as the * 1066 * structures were not set up at that time.) */ 1067 1068 dev_dbg(&port->dev, "port number is %d\n", port->port_number); 1069 dev_dbg(&port->dev, "minor number is %d\n", port->minor); 1070 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress); 1071 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress); 1072 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress); 1073 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num); 1074 mos7840_port->read_urb = port->read_urb; 1075 1076 /* set up our bulk in urb */ 1077 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1078 usb_fill_bulk_urb(mos7840_port->read_urb, 1079 serial->dev, 1080 usb_rcvbulkpipe(serial->dev, 1081 (port->bulk_in_endpointAddress) + 2), 1082 port->bulk_in_buffer, 1083 mos7840_port->read_urb->transfer_buffer_length, 1084 mos7840_bulk_in_callback, mos7840_port); 1085 } else { 1086 usb_fill_bulk_urb(mos7840_port->read_urb, 1087 serial->dev, 1088 usb_rcvbulkpipe(serial->dev, 1089 port->bulk_in_endpointAddress), 1090 port->bulk_in_buffer, 1091 mos7840_port->read_urb->transfer_buffer_length, 1092 mos7840_bulk_in_callback, mos7840_port); 1093 } 1094 1095 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress); 1096 mos7840_port->read_urb_busy = true; 1097 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1098 if (response) { 1099 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1100 __func__, response); 1101 mos7840_port->read_urb_busy = false; 1102 } 1103 1104 /* initialize our port settings */ 1105 /* Must set to enable ints! */ 1106 mos7840_port->shadowMCR = MCR_MASTER_IE; 1107 /* send a open port command */ 1108 mos7840_port->open = 1; 1109 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1110 1111 return 0; 1112 err: 1113 for (j = 0; j < NUM_URBS; ++j) { 1114 urb = mos7840_port->write_urb_pool[j]; 1115 if (!urb) 1116 continue; 1117 kfree(urb->transfer_buffer); 1118 usb_free_urb(urb); 1119 } 1120 return status; 1121 } 1122 1123 /***************************************************************************** 1124 * mos7840_chars_in_buffer 1125 * this function is called by the tty driver when it wants to know how many 1126 * bytes of data we currently have outstanding in the port (data that has 1127 * been written, but hasn't made it out the port yet) 1128 * If successful, we return the number of bytes left to be written in the 1129 * system, 1130 * Otherwise we return zero. 1131 *****************************************************************************/ 1132 1133 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1134 { 1135 struct usb_serial_port *port = tty->driver_data; 1136 int i; 1137 int chars = 0; 1138 unsigned long flags; 1139 struct moschip_port *mos7840_port; 1140 1141 if (mos7840_port_paranoia_check(port, __func__)) 1142 return 0; 1143 1144 mos7840_port = mos7840_get_port_private(port); 1145 if (mos7840_port == NULL) 1146 return 0; 1147 1148 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1149 for (i = 0; i < NUM_URBS; ++i) { 1150 if (mos7840_port->busy[i]) { 1151 struct urb *urb = mos7840_port->write_urb_pool[i]; 1152 chars += urb->transfer_buffer_length; 1153 } 1154 } 1155 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1156 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 1157 return chars; 1158 1159 } 1160 1161 /***************************************************************************** 1162 * mos7840_close 1163 * this function is called by the tty driver when a port is closed 1164 *****************************************************************************/ 1165 1166 static void mos7840_close(struct usb_serial_port *port) 1167 { 1168 struct usb_serial *serial; 1169 struct moschip_port *mos7840_port; 1170 struct moschip_port *port0; 1171 int j; 1172 __u16 Data; 1173 1174 if (mos7840_port_paranoia_check(port, __func__)) 1175 return; 1176 1177 serial = mos7840_get_usb_serial(port, __func__); 1178 if (!serial) 1179 return; 1180 1181 mos7840_port = mos7840_get_port_private(port); 1182 port0 = mos7840_get_port_private(serial->port[0]); 1183 1184 if (mos7840_port == NULL || port0 == NULL) 1185 return; 1186 1187 for (j = 0; j < NUM_URBS; ++j) 1188 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1189 1190 /* Freeing Write URBs */ 1191 for (j = 0; j < NUM_URBS; ++j) { 1192 if (mos7840_port->write_urb_pool[j]) { 1193 kfree(mos7840_port->write_urb_pool[j]->transfer_buffer); 1194 usb_free_urb(mos7840_port->write_urb_pool[j]); 1195 } 1196 } 1197 1198 usb_kill_urb(mos7840_port->read_urb); 1199 mos7840_port->read_urb_busy = false; 1200 1201 port0->open_ports--; 1202 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports); 1203 if (port0->open_ports == 0) { 1204 if (serial->port[0]->interrupt_in_urb) { 1205 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n"); 1206 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1207 } 1208 } 1209 1210 Data = 0x0; 1211 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1212 1213 Data = 0x00; 1214 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1215 1216 mos7840_port->open = 0; 1217 } 1218 1219 /***************************************************************************** 1220 * mos7840_break 1221 * this function sends a break to the port 1222 *****************************************************************************/ 1223 static void mos7840_break(struct tty_struct *tty, int break_state) 1224 { 1225 struct usb_serial_port *port = tty->driver_data; 1226 unsigned char data; 1227 struct usb_serial *serial; 1228 struct moschip_port *mos7840_port; 1229 1230 if (mos7840_port_paranoia_check(port, __func__)) 1231 return; 1232 1233 serial = mos7840_get_usb_serial(port, __func__); 1234 if (!serial) 1235 return; 1236 1237 mos7840_port = mos7840_get_port_private(port); 1238 1239 if (mos7840_port == NULL) 1240 return; 1241 1242 if (break_state == -1) 1243 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1244 else 1245 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1246 1247 /* FIXME: no locking on shadowLCR anywhere in driver */ 1248 mos7840_port->shadowLCR = data; 1249 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1250 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1251 mos7840_port->shadowLCR); 1252 } 1253 1254 /***************************************************************************** 1255 * mos7840_write_room 1256 * this function is called by the tty driver when it wants to know how many 1257 * bytes of data we can accept for a specific port. 1258 * If successful, we return the amount of room that we have for this port 1259 * Otherwise we return a negative error number. 1260 *****************************************************************************/ 1261 1262 static int mos7840_write_room(struct tty_struct *tty) 1263 { 1264 struct usb_serial_port *port = tty->driver_data; 1265 int i; 1266 int room = 0; 1267 unsigned long flags; 1268 struct moschip_port *mos7840_port; 1269 1270 if (mos7840_port_paranoia_check(port, __func__)) 1271 return -1; 1272 1273 mos7840_port = mos7840_get_port_private(port); 1274 if (mos7840_port == NULL) 1275 return -1; 1276 1277 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1278 for (i = 0; i < NUM_URBS; ++i) { 1279 if (!mos7840_port->busy[i]) 1280 room += URB_TRANSFER_BUFFER_SIZE; 1281 } 1282 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1283 1284 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1285 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); 1286 return room; 1287 1288 } 1289 1290 /***************************************************************************** 1291 * mos7840_write 1292 * this function is called by the tty driver when data should be written to 1293 * the port. 1294 * If successful, we return the number of bytes written, otherwise we 1295 * return a negative error number. 1296 *****************************************************************************/ 1297 1298 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1299 const unsigned char *data, int count) 1300 { 1301 int status; 1302 int i; 1303 int bytes_sent = 0; 1304 int transfer_size; 1305 unsigned long flags; 1306 1307 struct moschip_port *mos7840_port; 1308 struct usb_serial *serial; 1309 struct urb *urb; 1310 /* __u16 Data; */ 1311 const unsigned char *current_position = data; 1312 unsigned char *data1; 1313 1314 if (mos7840_port_paranoia_check(port, __func__)) 1315 return -1; 1316 1317 serial = port->serial; 1318 if (mos7840_serial_paranoia_check(serial, __func__)) 1319 return -1; 1320 1321 mos7840_port = mos7840_get_port_private(port); 1322 if (mos7840_port == NULL) 1323 return -1; 1324 1325 /* try to find a free urb in the list */ 1326 urb = NULL; 1327 1328 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1329 for (i = 0; i < NUM_URBS; ++i) { 1330 if (!mos7840_port->busy[i]) { 1331 mos7840_port->busy[i] = 1; 1332 urb = mos7840_port->write_urb_pool[i]; 1333 dev_dbg(&port->dev, "URB:%d\n", i); 1334 break; 1335 } 1336 } 1337 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1338 1339 if (urb == NULL) { 1340 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); 1341 goto exit; 1342 } 1343 1344 if (urb->transfer_buffer == NULL) { 1345 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 1346 GFP_ATOMIC); 1347 if (!urb->transfer_buffer) 1348 goto exit; 1349 } 1350 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1351 1352 memcpy(urb->transfer_buffer, current_position, transfer_size); 1353 1354 /* fill urb with data and submit */ 1355 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1356 usb_fill_bulk_urb(urb, 1357 serial->dev, 1358 usb_sndbulkpipe(serial->dev, 1359 (port->bulk_out_endpointAddress) + 2), 1360 urb->transfer_buffer, 1361 transfer_size, 1362 mos7840_bulk_out_data_callback, mos7840_port); 1363 } else { 1364 usb_fill_bulk_urb(urb, 1365 serial->dev, 1366 usb_sndbulkpipe(serial->dev, 1367 port->bulk_out_endpointAddress), 1368 urb->transfer_buffer, 1369 transfer_size, 1370 mos7840_bulk_out_data_callback, mos7840_port); 1371 } 1372 1373 data1 = urb->transfer_buffer; 1374 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); 1375 1376 if (mos7840_port->has_led) 1377 mos7840_led_activity(port); 1378 1379 /* send it down the pipe */ 1380 status = usb_submit_urb(urb, GFP_ATOMIC); 1381 1382 if (status) { 1383 mos7840_port->busy[i] = 0; 1384 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 1385 "with status = %d\n", __func__, status); 1386 bytes_sent = status; 1387 goto exit; 1388 } 1389 bytes_sent = transfer_size; 1390 port->icount.tx += transfer_size; 1391 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx); 1392 exit: 1393 return bytes_sent; 1394 1395 } 1396 1397 /***************************************************************************** 1398 * mos7840_throttle 1399 * this function is called by the tty driver when it wants to stop the data 1400 * being read from the port. 1401 *****************************************************************************/ 1402 1403 static void mos7840_throttle(struct tty_struct *tty) 1404 { 1405 struct usb_serial_port *port = tty->driver_data; 1406 struct moschip_port *mos7840_port; 1407 int status; 1408 1409 if (mos7840_port_paranoia_check(port, __func__)) 1410 return; 1411 1412 mos7840_port = mos7840_get_port_private(port); 1413 1414 if (mos7840_port == NULL) 1415 return; 1416 1417 if (!mos7840_port->open) { 1418 dev_dbg(&port->dev, "%s", "port not opened\n"); 1419 return; 1420 } 1421 1422 /* if we are implementing XON/XOFF, send the stop character */ 1423 if (I_IXOFF(tty)) { 1424 unsigned char stop_char = STOP_CHAR(tty); 1425 status = mos7840_write(tty, port, &stop_char, 1); 1426 if (status <= 0) 1427 return; 1428 } 1429 /* if we are implementing RTS/CTS, toggle that line */ 1430 if (C_CRTSCTS(tty)) { 1431 mos7840_port->shadowMCR &= ~MCR_RTS; 1432 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1433 mos7840_port->shadowMCR); 1434 if (status < 0) 1435 return; 1436 } 1437 } 1438 1439 /***************************************************************************** 1440 * mos7840_unthrottle 1441 * this function is called by the tty driver when it wants to resume 1442 * the data being read from the port (called after mos7840_throttle is 1443 * called) 1444 *****************************************************************************/ 1445 static void mos7840_unthrottle(struct tty_struct *tty) 1446 { 1447 struct usb_serial_port *port = tty->driver_data; 1448 int status; 1449 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1450 1451 if (mos7840_port_paranoia_check(port, __func__)) 1452 return; 1453 1454 if (mos7840_port == NULL) 1455 return; 1456 1457 if (!mos7840_port->open) { 1458 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1459 return; 1460 } 1461 1462 /* if we are implementing XON/XOFF, send the start character */ 1463 if (I_IXOFF(tty)) { 1464 unsigned char start_char = START_CHAR(tty); 1465 status = mos7840_write(tty, port, &start_char, 1); 1466 if (status <= 0) 1467 return; 1468 } 1469 1470 /* if we are implementing RTS/CTS, toggle that line */ 1471 if (C_CRTSCTS(tty)) { 1472 mos7840_port->shadowMCR |= MCR_RTS; 1473 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1474 mos7840_port->shadowMCR); 1475 if (status < 0) 1476 return; 1477 } 1478 } 1479 1480 static int mos7840_tiocmget(struct tty_struct *tty) 1481 { 1482 struct usb_serial_port *port = tty->driver_data; 1483 struct moschip_port *mos7840_port; 1484 unsigned int result; 1485 __u16 msr; 1486 __u16 mcr; 1487 int status; 1488 mos7840_port = mos7840_get_port_private(port); 1489 1490 if (mos7840_port == NULL) 1491 return -ENODEV; 1492 1493 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1494 if (status < 0) 1495 return -EIO; 1496 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1497 if (status < 0) 1498 return -EIO; 1499 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1500 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1501 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1502 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1503 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1504 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1505 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1506 1507 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 1508 1509 return result; 1510 } 1511 1512 static int mos7840_tiocmset(struct tty_struct *tty, 1513 unsigned int set, unsigned int clear) 1514 { 1515 struct usb_serial_port *port = tty->driver_data; 1516 struct moschip_port *mos7840_port; 1517 unsigned int mcr; 1518 int status; 1519 1520 mos7840_port = mos7840_get_port_private(port); 1521 1522 if (mos7840_port == NULL) 1523 return -ENODEV; 1524 1525 /* FIXME: What locks the port registers ? */ 1526 mcr = mos7840_port->shadowMCR; 1527 if (clear & TIOCM_RTS) 1528 mcr &= ~MCR_RTS; 1529 if (clear & TIOCM_DTR) 1530 mcr &= ~MCR_DTR; 1531 if (clear & TIOCM_LOOP) 1532 mcr &= ~MCR_LOOPBACK; 1533 1534 if (set & TIOCM_RTS) 1535 mcr |= MCR_RTS; 1536 if (set & TIOCM_DTR) 1537 mcr |= MCR_DTR; 1538 if (set & TIOCM_LOOP) 1539 mcr |= MCR_LOOPBACK; 1540 1541 mos7840_port->shadowMCR = mcr; 1542 1543 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1544 if (status < 0) { 1545 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); 1546 return status; 1547 } 1548 1549 return 0; 1550 } 1551 1552 /***************************************************************************** 1553 * mos7840_calc_baud_rate_divisor 1554 * this function calculates the proper baud rate divisor for the specified 1555 * baud rate. 1556 *****************************************************************************/ 1557 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, 1558 int baudRate, int *divisor, 1559 __u16 *clk_sel_val) 1560 { 1561 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); 1562 1563 if (baudRate <= 115200) { 1564 *divisor = 115200 / baudRate; 1565 *clk_sel_val = 0x0; 1566 } 1567 if ((baudRate > 115200) && (baudRate <= 230400)) { 1568 *divisor = 230400 / baudRate; 1569 *clk_sel_val = 0x10; 1570 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1571 *divisor = 403200 / baudRate; 1572 *clk_sel_val = 0x20; 1573 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1574 *divisor = 460800 / baudRate; 1575 *clk_sel_val = 0x30; 1576 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1577 *divisor = 806400 / baudRate; 1578 *clk_sel_val = 0x40; 1579 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1580 *divisor = 921600 / baudRate; 1581 *clk_sel_val = 0x50; 1582 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1583 *divisor = 1572864 / baudRate; 1584 *clk_sel_val = 0x60; 1585 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1586 *divisor = 3145728 / baudRate; 1587 *clk_sel_val = 0x70; 1588 } 1589 return 0; 1590 } 1591 1592 /***************************************************************************** 1593 * mos7840_send_cmd_write_baud_rate 1594 * this function sends the proper command to change the baud rate of the 1595 * specified port. 1596 *****************************************************************************/ 1597 1598 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1599 int baudRate) 1600 { 1601 int divisor = 0; 1602 int status; 1603 __u16 Data; 1604 unsigned char number; 1605 __u16 clk_sel_val; 1606 struct usb_serial_port *port; 1607 1608 if (mos7840_port == NULL) 1609 return -1; 1610 1611 port = mos7840_port->port; 1612 if (mos7840_port_paranoia_check(port, __func__)) 1613 return -1; 1614 1615 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1616 return -1; 1617 1618 number = mos7840_port->port->port_number; 1619 1620 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate); 1621 /* reset clk_uart_sel in spregOffset */ 1622 if (baudRate > 115200) { 1623 #ifdef HW_flow_control 1624 /* NOTE: need to see the pther register to modify */ 1625 /* setting h/w flow control bit to 1 */ 1626 Data = 0x2b; 1627 mos7840_port->shadowMCR = Data; 1628 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1629 Data); 1630 if (status < 0) { 1631 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1632 return -1; 1633 } 1634 #endif 1635 1636 } else { 1637 #ifdef HW_flow_control 1638 /* setting h/w flow control bit to 0 */ 1639 Data = 0xb; 1640 mos7840_port->shadowMCR = Data; 1641 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1642 Data); 1643 if (status < 0) { 1644 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1645 return -1; 1646 } 1647 #endif 1648 1649 } 1650 1651 if (1) { /* baudRate <= 115200) */ 1652 clk_sel_val = 0x0; 1653 Data = 0x0; 1654 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, 1655 &clk_sel_val); 1656 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1657 &Data); 1658 if (status < 0) { 1659 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); 1660 return -1; 1661 } 1662 Data = (Data & 0x8f) | clk_sel_val; 1663 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1664 Data); 1665 if (status < 0) { 1666 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1667 return -1; 1668 } 1669 /* Calculate the Divisor */ 1670 1671 if (status) { 1672 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1673 return status; 1674 } 1675 /* Enable access to divisor latch */ 1676 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1677 mos7840_port->shadowLCR = Data; 1678 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1679 1680 /* Write the divisor */ 1681 Data = (unsigned char)(divisor & 0xff); 1682 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); 1683 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1684 1685 Data = (unsigned char)((divisor & 0xff00) >> 8); 1686 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); 1687 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1688 1689 /* Disable access to divisor latch */ 1690 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1691 mos7840_port->shadowLCR = Data; 1692 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1693 1694 } 1695 return status; 1696 } 1697 1698 /***************************************************************************** 1699 * mos7840_change_port_settings 1700 * This routine is called to set the UART on the device to match 1701 * the specified new settings. 1702 *****************************************************************************/ 1703 1704 static void mos7840_change_port_settings(struct tty_struct *tty, 1705 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1706 { 1707 int baud; 1708 unsigned cflag; 1709 unsigned iflag; 1710 __u8 lData; 1711 __u8 lParity; 1712 __u8 lStop; 1713 int status; 1714 __u16 Data; 1715 struct usb_serial_port *port; 1716 struct usb_serial *serial; 1717 1718 if (mos7840_port == NULL) 1719 return; 1720 1721 port = mos7840_port->port; 1722 1723 if (mos7840_port_paranoia_check(port, __func__)) 1724 return; 1725 1726 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1727 return; 1728 1729 serial = port->serial; 1730 1731 if (!mos7840_port->open) { 1732 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1733 return; 1734 } 1735 1736 lData = LCR_BITS_8; 1737 lStop = LCR_STOP_1; 1738 lParity = LCR_PAR_NONE; 1739 1740 cflag = tty->termios.c_cflag; 1741 iflag = tty->termios.c_iflag; 1742 1743 /* Change the number of bits */ 1744 switch (cflag & CSIZE) { 1745 case CS5: 1746 lData = LCR_BITS_5; 1747 break; 1748 1749 case CS6: 1750 lData = LCR_BITS_6; 1751 break; 1752 1753 case CS7: 1754 lData = LCR_BITS_7; 1755 break; 1756 1757 default: 1758 case CS8: 1759 lData = LCR_BITS_8; 1760 break; 1761 } 1762 1763 /* Change the Parity bit */ 1764 if (cflag & PARENB) { 1765 if (cflag & PARODD) { 1766 lParity = LCR_PAR_ODD; 1767 dev_dbg(&port->dev, "%s - parity = odd\n", __func__); 1768 } else { 1769 lParity = LCR_PAR_EVEN; 1770 dev_dbg(&port->dev, "%s - parity = even\n", __func__); 1771 } 1772 1773 } else { 1774 dev_dbg(&port->dev, "%s - parity = none\n", __func__); 1775 } 1776 1777 if (cflag & CMSPAR) 1778 lParity = lParity | 0x20; 1779 1780 /* Change the Stop bit */ 1781 if (cflag & CSTOPB) { 1782 lStop = LCR_STOP_2; 1783 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); 1784 } else { 1785 lStop = LCR_STOP_1; 1786 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); 1787 } 1788 1789 /* Update the LCR with the correct value */ 1790 mos7840_port->shadowLCR &= 1791 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1792 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1793 1794 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, 1795 mos7840_port->shadowLCR); 1796 /* Disable Interrupts */ 1797 Data = 0x00; 1798 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1799 1800 Data = 0x00; 1801 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1802 1803 Data = 0xcf; 1804 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1805 1806 /* Send the updated LCR value to the mos7840 */ 1807 Data = mos7840_port->shadowLCR; 1808 1809 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1810 1811 Data = 0x00b; 1812 mos7840_port->shadowMCR = Data; 1813 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1814 Data = 0x00b; 1815 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1816 1817 /* set up the MCR register and send it to the mos7840 */ 1818 1819 mos7840_port->shadowMCR = MCR_MASTER_IE; 1820 if (cflag & CBAUD) 1821 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1822 1823 if (cflag & CRTSCTS) 1824 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1825 else 1826 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 1827 1828 Data = mos7840_port->shadowMCR; 1829 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1830 1831 /* Determine divisor based on baud rate */ 1832 baud = tty_get_baud_rate(tty); 1833 1834 if (!baud) { 1835 /* pick a default, any default... */ 1836 dev_dbg(&port->dev, "%s", "Picked default baud...\n"); 1837 baud = 9600; 1838 } 1839 1840 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); 1841 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 1842 1843 /* Enable Interrupts */ 1844 Data = 0x0c; 1845 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1846 1847 if (!mos7840_port->read_urb_busy) { 1848 mos7840_port->read_urb_busy = true; 1849 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1850 if (status) { 1851 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1852 status); 1853 mos7840_port->read_urb_busy = false; 1854 } 1855 } 1856 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, 1857 mos7840_port->shadowLCR); 1858 } 1859 1860 /***************************************************************************** 1861 * mos7840_set_termios 1862 * this function is called by the tty driver when it wants to change 1863 * the termios structure 1864 *****************************************************************************/ 1865 1866 static void mos7840_set_termios(struct tty_struct *tty, 1867 struct usb_serial_port *port, 1868 struct ktermios *old_termios) 1869 { 1870 int status; 1871 struct usb_serial *serial; 1872 struct moschip_port *mos7840_port; 1873 1874 if (mos7840_port_paranoia_check(port, __func__)) 1875 return; 1876 1877 serial = port->serial; 1878 1879 if (mos7840_serial_paranoia_check(serial, __func__)) 1880 return; 1881 1882 mos7840_port = mos7840_get_port_private(port); 1883 1884 if (mos7840_port == NULL) 1885 return; 1886 1887 if (!mos7840_port->open) { 1888 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1889 return; 1890 } 1891 1892 /* change the port settings to the new ones specified */ 1893 1894 mos7840_change_port_settings(tty, mos7840_port, old_termios); 1895 1896 if (!mos7840_port->read_urb) { 1897 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n"); 1898 return; 1899 } 1900 1901 if (!mos7840_port->read_urb_busy) { 1902 mos7840_port->read_urb_busy = true; 1903 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1904 if (status) { 1905 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1906 status); 1907 mos7840_port->read_urb_busy = false; 1908 } 1909 } 1910 } 1911 1912 /***************************************************************************** 1913 * mos7840_get_lsr_info - get line status register info 1914 * 1915 * Purpose: Let user call ioctl() to get info when the UART physically 1916 * is emptied. On bus types like RS485, the transmitter must 1917 * release the bus after transmitting. This must be done when 1918 * the transmit shift register is empty, not be done when the 1919 * transmit holding register is empty. This functionality 1920 * allows an RS485 driver to be written in user space. 1921 *****************************************************************************/ 1922 1923 static int mos7840_get_lsr_info(struct tty_struct *tty, 1924 unsigned int __user *value) 1925 { 1926 int count; 1927 unsigned int result = 0; 1928 1929 count = mos7840_chars_in_buffer(tty); 1930 if (count == 0) 1931 result = TIOCSER_TEMT; 1932 1933 if (copy_to_user(value, &result, sizeof(int))) 1934 return -EFAULT; 1935 return 0; 1936 } 1937 1938 /***************************************************************************** 1939 * mos7840_get_serial_info 1940 * function to get information about serial port 1941 *****************************************************************************/ 1942 1943 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 1944 struct serial_struct __user *retinfo) 1945 { 1946 struct serial_struct tmp; 1947 1948 if (mos7840_port == NULL) 1949 return -1; 1950 1951 memset(&tmp, 0, sizeof(tmp)); 1952 1953 tmp.type = PORT_16550A; 1954 tmp.line = mos7840_port->port->minor; 1955 tmp.port = mos7840_port->port->port_number; 1956 tmp.irq = 0; 1957 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 1958 tmp.baud_base = 9600; 1959 tmp.close_delay = 5 * HZ; 1960 tmp.closing_wait = 30 * HZ; 1961 1962 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1963 return -EFAULT; 1964 return 0; 1965 } 1966 1967 /***************************************************************************** 1968 * SerialIoctl 1969 * this function handles any ioctl calls to the driver 1970 *****************************************************************************/ 1971 1972 static int mos7840_ioctl(struct tty_struct *tty, 1973 unsigned int cmd, unsigned long arg) 1974 { 1975 struct usb_serial_port *port = tty->driver_data; 1976 void __user *argp = (void __user *)arg; 1977 struct moschip_port *mos7840_port; 1978 1979 if (mos7840_port_paranoia_check(port, __func__)) 1980 return -1; 1981 1982 mos7840_port = mos7840_get_port_private(port); 1983 1984 if (mos7840_port == NULL) 1985 return -1; 1986 1987 switch (cmd) { 1988 /* return number of bytes available */ 1989 1990 case TIOCSERGETLSR: 1991 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 1992 return mos7840_get_lsr_info(tty, argp); 1993 1994 case TIOCGSERIAL: 1995 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); 1996 return mos7840_get_serial_info(mos7840_port, argp); 1997 1998 case TIOCSSERIAL: 1999 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__); 2000 break; 2001 default: 2002 break; 2003 } 2004 return -ENOIOCTLCMD; 2005 } 2006 2007 static int mos7810_check(struct usb_serial *serial) 2008 { 2009 int i, pass_count = 0; 2010 u8 *buf; 2011 __u16 data = 0, mcr_data = 0; 2012 __u16 test_pattern = 0x55AA; 2013 int res; 2014 2015 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2016 if (!buf) 2017 return 0; /* failed to identify 7810 */ 2018 2019 /* Store MCR setting */ 2020 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2021 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, 2022 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2023 if (res == VENDOR_READ_LENGTH) 2024 mcr_data = *buf; 2025 2026 for (i = 0; i < 16; i++) { 2027 /* Send the 1-bit test pattern out to MCS7810 test pin */ 2028 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2029 MCS_WRREQ, MCS_WR_RTYPE, 2030 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), 2031 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); 2032 2033 /* Read the test pattern back */ 2034 res = usb_control_msg(serial->dev, 2035 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, 2036 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2037 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2038 if (res == VENDOR_READ_LENGTH) 2039 data = *buf; 2040 2041 /* If this is a MCS7810 device, both test patterns must match */ 2042 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) 2043 break; 2044 2045 pass_count++; 2046 } 2047 2048 /* Restore MCR setting */ 2049 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, 2050 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 2051 0, MOS_WDR_TIMEOUT); 2052 2053 kfree(buf); 2054 2055 if (pass_count == 16) 2056 return 1; 2057 2058 return 0; 2059 } 2060 2061 static int mos7840_probe(struct usb_serial *serial, 2062 const struct usb_device_id *id) 2063 { 2064 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); 2065 u8 *buf; 2066 int device_type; 2067 2068 if (product == MOSCHIP_DEVICE_ID_7810 || 2069 product == MOSCHIP_DEVICE_ID_7820) { 2070 device_type = product; 2071 goto out; 2072 } 2073 2074 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2075 if (!buf) 2076 return -ENOMEM; 2077 2078 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2079 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2080 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2081 2082 /* For a MCS7840 device GPIO0 must be set to 1 */ 2083 if (buf[0] & 0x01) 2084 device_type = MOSCHIP_DEVICE_ID_7840; 2085 else if (mos7810_check(serial)) 2086 device_type = MOSCHIP_DEVICE_ID_7810; 2087 else 2088 device_type = MOSCHIP_DEVICE_ID_7820; 2089 2090 kfree(buf); 2091 out: 2092 usb_set_serial_data(serial, (void *)(unsigned long)device_type); 2093 2094 return 0; 2095 } 2096 2097 static int mos7840_calc_num_ports(struct usb_serial *serial, 2098 struct usb_serial_endpoints *epds) 2099 { 2100 int device_type = (unsigned long)usb_get_serial_data(serial); 2101 int num_ports; 2102 2103 num_ports = (device_type >> 4) & 0x000F; 2104 2105 /* 2106 * num_ports is currently never zero as device_type is one of 2107 * MOSCHIP_DEVICE_ID_78{1,2,4}0. 2108 */ 2109 if (num_ports == 0) 2110 return -ENODEV; 2111 2112 if (epds->num_bulk_in < num_ports || epds->num_bulk_out < num_ports) { 2113 dev_err(&serial->interface->dev, "missing endpoints\n"); 2114 return -ENODEV; 2115 } 2116 2117 return num_ports; 2118 } 2119 2120 static int mos7840_port_probe(struct usb_serial_port *port) 2121 { 2122 struct usb_serial *serial = port->serial; 2123 int device_type = (unsigned long)usb_get_serial_data(serial); 2124 struct moschip_port *mos7840_port; 2125 int status; 2126 int pnum; 2127 __u16 Data; 2128 2129 /* we set up the pointers to the endpoints in the mos7840_open * 2130 * function, as the structures aren't created yet. */ 2131 2132 pnum = port->port_number; 2133 2134 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); 2135 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2136 if (!mos7840_port) 2137 return -ENOMEM; 2138 2139 /* Initialize all port interrupt end point to port 0 int 2140 * endpoint. Our device has only one interrupt end point 2141 * common to all port */ 2142 2143 mos7840_port->port = port; 2144 mos7840_set_port_private(port, mos7840_port); 2145 spin_lock_init(&mos7840_port->pool_lock); 2146 2147 /* minor is not initialised until later by 2148 * usb-serial.c:get_free_serial() and cannot therefore be used 2149 * to index device instances */ 2150 mos7840_port->port_num = pnum + 1; 2151 dev_dbg(&port->dev, "port->minor = %d\n", port->minor); 2152 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); 2153 2154 if (mos7840_port->port_num == 1) { 2155 mos7840_port->SpRegOffset = 0x0; 2156 mos7840_port->ControlRegOffset = 0x1; 2157 mos7840_port->DcrRegOffset = 0x4; 2158 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) { 2159 mos7840_port->SpRegOffset = 0x8; 2160 mos7840_port->ControlRegOffset = 0x9; 2161 mos7840_port->DcrRegOffset = 0x16; 2162 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) { 2163 mos7840_port->SpRegOffset = 0xa; 2164 mos7840_port->ControlRegOffset = 0xb; 2165 mos7840_port->DcrRegOffset = 0x19; 2166 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) { 2167 mos7840_port->SpRegOffset = 0xa; 2168 mos7840_port->ControlRegOffset = 0xb; 2169 mos7840_port->DcrRegOffset = 0x19; 2170 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) { 2171 mos7840_port->SpRegOffset = 0xc; 2172 mos7840_port->ControlRegOffset = 0xd; 2173 mos7840_port->DcrRegOffset = 0x1c; 2174 } 2175 mos7840_dump_serial_port(port, mos7840_port); 2176 mos7840_set_port_private(port, mos7840_port); 2177 2178 /* enable rx_disable bit in control register */ 2179 status = mos7840_get_reg_sync(port, 2180 mos7840_port->ControlRegOffset, &Data); 2181 if (status < 0) { 2182 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); 2183 goto out; 2184 } else 2185 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); 2186 Data |= 0x08; /* setting driver done bit */ 2187 Data |= 0x04; /* sp1_bit to have cts change reflect in 2188 modem status reg */ 2189 2190 /* Data |= 0x20; //rx_disable bit */ 2191 status = mos7840_set_reg_sync(port, 2192 mos7840_port->ControlRegOffset, Data); 2193 if (status < 0) { 2194 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2195 goto out; 2196 } else 2197 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); 2198 2199 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2200 and 0x24 in DCR3 */ 2201 Data = 0x01; 2202 status = mos7840_set_reg_sync(port, 2203 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2204 if (status < 0) { 2205 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); 2206 goto out; 2207 } else 2208 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); 2209 2210 Data = 0x05; 2211 status = mos7840_set_reg_sync(port, 2212 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2213 if (status < 0) { 2214 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); 2215 goto out; 2216 } else 2217 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); 2218 2219 Data = 0x24; 2220 status = mos7840_set_reg_sync(port, 2221 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2222 if (status < 0) { 2223 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); 2224 goto out; 2225 } else 2226 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); 2227 2228 /* write values in clkstart0x0 and clkmulti 0x20 */ 2229 Data = 0x0; 2230 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); 2231 if (status < 0) { 2232 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2233 goto out; 2234 } else 2235 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2236 2237 Data = 0x20; 2238 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); 2239 if (status < 0) { 2240 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); 2241 goto error; 2242 } else 2243 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); 2244 2245 /* write value 0x0 to scratchpad register */ 2246 Data = 0x00; 2247 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); 2248 if (status < 0) { 2249 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); 2250 goto out; 2251 } else 2252 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); 2253 2254 /* Zero Length flag register */ 2255 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { 2256 Data = 0xff; 2257 status = mos7840_set_reg_sync(port, 2258 (__u16) (ZLP_REG1 + 2259 ((__u16)mos7840_port->port_num)), Data); 2260 dev_dbg(&port->dev, "ZLIP offset %x\n", 2261 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); 2262 if (status < 0) { 2263 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); 2264 goto out; 2265 } else 2266 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); 2267 } else { 2268 Data = 0xff; 2269 status = mos7840_set_reg_sync(port, 2270 (__u16) (ZLP_REG1 + 2271 ((__u16)mos7840_port->port_num) - 0x1), Data); 2272 dev_dbg(&port->dev, "ZLIP offset %x\n", 2273 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); 2274 if (status < 0) { 2275 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); 2276 goto out; 2277 } else 2278 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); 2279 2280 } 2281 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2282 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2283 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2284 GFP_KERNEL); 2285 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2286 !mos7840_port->dr) { 2287 status = -ENOMEM; 2288 goto error; 2289 } 2290 2291 mos7840_port->has_led = false; 2292 2293 /* Initialize LED timers */ 2294 if (device_type == MOSCHIP_DEVICE_ID_7810) { 2295 mos7840_port->has_led = true; 2296 2297 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL); 2298 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr), 2299 GFP_KERNEL); 2300 if (!mos7840_port->led_urb || !mos7840_port->led_dr) { 2301 status = -ENOMEM; 2302 goto error; 2303 } 2304 2305 setup_timer(&mos7840_port->led_timer1, mos7840_led_off, 2306 (unsigned long)mos7840_port); 2307 mos7840_port->led_timer1.expires = 2308 jiffies + msecs_to_jiffies(LED_ON_MS); 2309 setup_timer(&mos7840_port->led_timer2, mos7840_led_flag_off, 2310 (unsigned long)mos7840_port); 2311 mos7840_port->led_timer2.expires = 2312 jiffies + msecs_to_jiffies(LED_OFF_MS); 2313 2314 /* Turn off LED */ 2315 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2316 } 2317 out: 2318 if (pnum == serial->num_ports - 1) { 2319 /* Zero Length flag enable */ 2320 Data = 0x0f; 2321 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2322 if (status < 0) { 2323 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status); 2324 goto error; 2325 } else 2326 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status); 2327 2328 /* setting configuration feature to one */ 2329 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2330 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 2331 MOS_WDR_TIMEOUT); 2332 } 2333 return 0; 2334 error: 2335 kfree(mos7840_port->led_dr); 2336 usb_free_urb(mos7840_port->led_urb); 2337 kfree(mos7840_port->dr); 2338 kfree(mos7840_port->ctrl_buf); 2339 usb_free_urb(mos7840_port->control_urb); 2340 kfree(mos7840_port); 2341 2342 return status; 2343 } 2344 2345 static int mos7840_port_remove(struct usb_serial_port *port) 2346 { 2347 struct moschip_port *mos7840_port; 2348 2349 mos7840_port = mos7840_get_port_private(port); 2350 2351 if (mos7840_port->has_led) { 2352 /* Turn off LED */ 2353 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2354 2355 del_timer_sync(&mos7840_port->led_timer1); 2356 del_timer_sync(&mos7840_port->led_timer2); 2357 2358 usb_kill_urb(mos7840_port->led_urb); 2359 usb_free_urb(mos7840_port->led_urb); 2360 kfree(mos7840_port->led_dr); 2361 } 2362 usb_kill_urb(mos7840_port->control_urb); 2363 usb_free_urb(mos7840_port->control_urb); 2364 kfree(mos7840_port->ctrl_buf); 2365 kfree(mos7840_port->dr); 2366 kfree(mos7840_port); 2367 2368 return 0; 2369 } 2370 2371 static struct usb_serial_driver moschip7840_4port_device = { 2372 .driver = { 2373 .owner = THIS_MODULE, 2374 .name = "mos7840", 2375 }, 2376 .description = DRIVER_DESC, 2377 .id_table = id_table, 2378 .num_interrupt_in = 1, 2379 .open = mos7840_open, 2380 .close = mos7840_close, 2381 .write = mos7840_write, 2382 .write_room = mos7840_write_room, 2383 .chars_in_buffer = mos7840_chars_in_buffer, 2384 .throttle = mos7840_throttle, 2385 .unthrottle = mos7840_unthrottle, 2386 .calc_num_ports = mos7840_calc_num_ports, 2387 .probe = mos7840_probe, 2388 .ioctl = mos7840_ioctl, 2389 .set_termios = mos7840_set_termios, 2390 .break_ctl = mos7840_break, 2391 .tiocmget = mos7840_tiocmget, 2392 .tiocmset = mos7840_tiocmset, 2393 .tiocmiwait = usb_serial_generic_tiocmiwait, 2394 .get_icount = usb_serial_generic_get_icount, 2395 .port_probe = mos7840_port_probe, 2396 .port_remove = mos7840_port_remove, 2397 .read_bulk_callback = mos7840_bulk_in_callback, 2398 .read_int_callback = mos7840_interrupt_callback, 2399 }; 2400 2401 static struct usb_serial_driver * const serial_drivers[] = { 2402 &moschip7840_4port_device, NULL 2403 }; 2404 2405 module_usb_serial_driver(serial_drivers, id_table); 2406 2407 MODULE_DESCRIPTION(DRIVER_DESC); 2408 MODULE_LICENSE("GPL"); 2409