1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Clean ups from Moschip version and a few ioctl implementations by: 4 * Paul B Schroeder <pschroeder "at" uplogix "dot" com> 5 * 6 * Originally based on drivers/usb/serial/io_edgeport.c which is: 7 * Copyright (C) 2000 Inside Out Networks, All rights reserved. 8 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 9 * 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/errno.h> 14 #include <linux/slab.h> 15 #include <linux/tty.h> 16 #include <linux/tty_driver.h> 17 #include <linux/tty_flip.h> 18 #include <linux/module.h> 19 #include <linux/serial.h> 20 #include <linux/usb.h> 21 #include <linux/usb/serial.h> 22 #include <linux/uaccess.h> 23 24 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" 25 26 /* 27 * 16C50 UART register defines 28 */ 29 30 #define LCR_BITS_5 0x00 /* 5 bits/char */ 31 #define LCR_BITS_6 0x01 /* 6 bits/char */ 32 #define LCR_BITS_7 0x02 /* 7 bits/char */ 33 #define LCR_BITS_8 0x03 /* 8 bits/char */ 34 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ 35 36 #define LCR_STOP_1 0x00 /* 1 stop bit */ 37 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ 38 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ 39 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ 40 41 #define LCR_PAR_NONE 0x00 /* No parity */ 42 #define LCR_PAR_ODD 0x08 /* Odd parity */ 43 #define LCR_PAR_EVEN 0x18 /* Even parity */ 44 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ 45 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ 46 #define LCR_PAR_MASK 0x38 /* Mask for parity field */ 47 48 #define LCR_SET_BREAK 0x40 /* Set Break condition */ 49 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ 50 51 #define MCR_DTR 0x01 /* Assert DTR */ 52 #define MCR_RTS 0x02 /* Assert RTS */ 53 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ 54 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ 55 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ 56 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ 57 58 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ 59 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ 60 #define MOS7840_MSR_RI 0x40 /* Current state of RI */ 61 #define MOS7840_MSR_CD 0x80 /* Current state of CD */ 62 63 /* 64 * Defines used for sending commands to port 65 */ 66 67 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */ 68 69 #define MOS_PORT1 0x0200 70 #define MOS_PORT2 0x0300 71 #define MOS_VENREG 0x0000 72 #define MOS_MAX_PORT 0x02 73 #define MOS_WRITE 0x0E 74 #define MOS_READ 0x0D 75 76 /* Requests */ 77 #define MCS_RD_RTYPE 0xC0 78 #define MCS_WR_RTYPE 0x40 79 #define MCS_RDREQ 0x0D 80 #define MCS_WRREQ 0x0E 81 #define MCS_CTRL_TIMEOUT 500 82 #define VENDOR_READ_LENGTH (0x01) 83 84 #define MAX_NAME_LEN 64 85 86 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ 87 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ 88 89 /* For higher baud Rates use TIOCEXBAUD */ 90 #define TIOCEXBAUD 0x5462 91 92 /* vendor id and device id defines */ 93 94 /* The native mos7840/7820 component */ 95 #define USB_VENDOR_ID_MOSCHIP 0x9710 96 #define MOSCHIP_DEVICE_ID_7840 0x7840 97 #define MOSCHIP_DEVICE_ID_7820 0x7820 98 #define MOSCHIP_DEVICE_ID_7810 0x7810 99 /* The native component can have its vendor/device id's overridden 100 * in vendor-specific implementations. Such devices can be handled 101 * by making a change here, in id_table. 102 */ 103 #define USB_VENDOR_ID_BANDB 0x0856 104 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22 105 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00 106 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24 107 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01 108 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29 109 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30 110 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31 111 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32 112 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 113 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02 114 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 115 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03 116 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24 117 118 /* This driver also supports 119 * ATEN UC2324 device using Moschip MCS7840 120 * ATEN UC2322 device using Moschip MCS7820 121 */ 122 #define USB_VENDOR_ID_ATENINTL 0x0557 123 #define ATENINTL_DEVICE_ID_UC2324 0x2011 124 #define ATENINTL_DEVICE_ID_UC2322 0x7820 125 126 /* Interrupt Routine Defines */ 127 128 #define SERIAL_IIR_RLS 0x06 129 #define SERIAL_IIR_MS 0x00 130 131 /* 132 * Emulation of the bit mask on the LINE STATUS REGISTER. 133 */ 134 #define SERIAL_LSR_DR 0x0001 135 #define SERIAL_LSR_OE 0x0002 136 #define SERIAL_LSR_PE 0x0004 137 #define SERIAL_LSR_FE 0x0008 138 #define SERIAL_LSR_BI 0x0010 139 140 #define MOS_MSR_DELTA_CTS 0x10 141 #define MOS_MSR_DELTA_DSR 0x20 142 #define MOS_MSR_DELTA_RI 0x40 143 #define MOS_MSR_DELTA_CD 0x80 144 145 /* Serial Port register Address */ 146 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) 147 #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) 148 #define LINE_CONTROL_REGISTER ((__u16)(0x03)) 149 #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) 150 #define LINE_STATUS_REGISTER ((__u16)(0x05)) 151 #define MODEM_STATUS_REGISTER ((__u16)(0x06)) 152 #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) 153 #define DIVISOR_LATCH_LSB ((__u16)(0x00)) 154 #define DIVISOR_LATCH_MSB ((__u16)(0x01)) 155 156 #define CLK_MULTI_REGISTER ((__u16)(0x02)) 157 #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) 158 #define GPIO_REGISTER ((__u16)(0x07)) 159 160 #define SERIAL_LCR_DLAB ((__u16)(0x0080)) 161 162 /* 163 * URB POOL related defines 164 */ 165 #define NUM_URBS 16 /* URB Count */ 166 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ 167 168 /* LED on/off milliseconds*/ 169 #define LED_ON_MS 500 170 #define LED_OFF_MS 500 171 172 enum mos7840_flag { 173 MOS7840_FLAG_CTRL_BUSY, 174 MOS7840_FLAG_LED_BUSY, 175 }; 176 177 static const struct usb_device_id id_table[] = { 178 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)}, 179 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)}, 180 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)}, 181 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)}, 182 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)}, 183 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)}, 184 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)}, 185 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)}, 186 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)}, 187 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)}, 188 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)}, 189 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)}, 190 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)}, 191 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)}, 192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)}, 193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)}, 194 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)}, 195 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)}, 196 {} /* terminating entry */ 197 }; 198 MODULE_DEVICE_TABLE(usb, id_table); 199 200 /* This structure holds all of the local port information */ 201 202 struct moschip_port { 203 int port_num; /*Actual port number in the device(1,2,etc) */ 204 struct urb *read_urb; /* read URB for this port */ 205 __u8 shadowLCR; /* last LCR value received */ 206 __u8 shadowMCR; /* last MCR value received */ 207 char open; 208 char open_ports; 209 struct usb_serial_port *port; /* loop back to the owner of this object */ 210 211 /* Offsets */ 212 __u8 SpRegOffset; 213 __u8 ControlRegOffset; 214 __u8 DcrRegOffset; 215 /* for processing control URBS in interrupt context */ 216 struct urb *control_urb; 217 struct usb_ctrlrequest *dr; 218 char *ctrl_buf; 219 int MsrLsr; 220 221 spinlock_t pool_lock; 222 struct urb *write_urb_pool[NUM_URBS]; 223 char busy[NUM_URBS]; 224 bool read_urb_busy; 225 226 /* For device(s) with LED indicator */ 227 bool has_led; 228 struct timer_list led_timer1; /* Timer for LED on */ 229 struct timer_list led_timer2; /* Timer for LED off */ 230 struct urb *led_urb; 231 struct usb_ctrlrequest *led_dr; 232 233 unsigned long flags; 234 }; 235 236 /* 237 * mos7840_set_reg_sync 238 * To set the Control register by calling usb_fill_control_urb function 239 * by passing usb_sndctrlpipe function as parameter. 240 */ 241 242 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, 243 __u16 val) 244 { 245 struct usb_device *dev = port->serial->dev; 246 val = val & 0x00ff; 247 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val); 248 249 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 250 MCS_WR_RTYPE, val, reg, NULL, 0, 251 MOS_WDR_TIMEOUT); 252 } 253 254 /* 255 * mos7840_get_reg_sync 256 * To set the Uart register by calling usb_fill_control_urb function by 257 * passing usb_rcvctrlpipe function as parameter. 258 */ 259 260 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, 261 __u16 *val) 262 { 263 struct usb_device *dev = port->serial->dev; 264 int ret = 0; 265 u8 *buf; 266 267 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 268 if (!buf) 269 return -ENOMEM; 270 271 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 272 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, 273 MOS_WDR_TIMEOUT); 274 if (ret < VENDOR_READ_LENGTH) { 275 if (ret >= 0) 276 ret = -EIO; 277 goto out; 278 } 279 280 *val = buf[0]; 281 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val); 282 out: 283 kfree(buf); 284 return ret; 285 } 286 287 /* 288 * mos7840_set_uart_reg 289 * To set the Uart register by calling usb_fill_control_urb function by 290 * passing usb_sndctrlpipe function as parameter. 291 */ 292 293 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, 294 __u16 val) 295 { 296 297 struct usb_device *dev = port->serial->dev; 298 val = val & 0x00ff; 299 /* For the UART control registers, the application number need 300 to be Or'ed */ 301 if (port->serial->num_ports == 4) { 302 val |= ((__u16)port->port_number + 1) << 8; 303 } else { 304 if (port->port_number == 0) { 305 val |= ((__u16)port->port_number + 1) << 8; 306 } else { 307 val |= ((__u16)port->port_number + 2) << 8; 308 } 309 } 310 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val); 311 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, 312 MCS_WR_RTYPE, val, reg, NULL, 0, 313 MOS_WDR_TIMEOUT); 314 315 } 316 317 /* 318 * mos7840_get_uart_reg 319 * To set the Control register by calling usb_fill_control_urb function 320 * by passing usb_rcvctrlpipe function as parameter. 321 */ 322 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, 323 __u16 *val) 324 { 325 struct usb_device *dev = port->serial->dev; 326 int ret = 0; 327 __u16 Wval; 328 u8 *buf; 329 330 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 331 if (!buf) 332 return -ENOMEM; 333 334 /* Wval is same as application number */ 335 if (port->serial->num_ports == 4) { 336 Wval = ((__u16)port->port_number + 1) << 8; 337 } else { 338 if (port->port_number == 0) { 339 Wval = ((__u16)port->port_number + 1) << 8; 340 } else { 341 Wval = ((__u16)port->port_number + 2) << 8; 342 } 343 } 344 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval); 345 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, 346 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, 347 MOS_WDR_TIMEOUT); 348 if (ret < VENDOR_READ_LENGTH) { 349 if (ret >= 0) 350 ret = -EIO; 351 goto out; 352 } 353 *val = buf[0]; 354 out: 355 kfree(buf); 356 return ret; 357 } 358 359 static void mos7840_dump_serial_port(struct usb_serial_port *port, 360 struct moschip_port *mos7840_port) 361 { 362 363 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset); 364 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset); 365 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset); 366 367 } 368 369 /************************************************************************/ 370 /************************************************************************/ 371 /* I N T E R F A C E F U N C T I O N S */ 372 /* I N T E R F A C E F U N C T I O N S */ 373 /************************************************************************/ 374 /************************************************************************/ 375 376 static inline void mos7840_set_port_private(struct usb_serial_port *port, 377 struct moschip_port *data) 378 { 379 usb_set_serial_port_data(port, (void *)data); 380 } 381 382 static inline struct moschip_port *mos7840_get_port_private(struct 383 usb_serial_port 384 *port) 385 { 386 return (struct moschip_port *)usb_get_serial_port_data(port); 387 } 388 389 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr) 390 { 391 struct moschip_port *mos7840_port; 392 struct async_icount *icount; 393 mos7840_port = port; 394 if (new_msr & 395 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI | 396 MOS_MSR_DELTA_CD)) { 397 icount = &mos7840_port->port->icount; 398 399 /* update input line counters */ 400 if (new_msr & MOS_MSR_DELTA_CTS) 401 icount->cts++; 402 if (new_msr & MOS_MSR_DELTA_DSR) 403 icount->dsr++; 404 if (new_msr & MOS_MSR_DELTA_CD) 405 icount->dcd++; 406 if (new_msr & MOS_MSR_DELTA_RI) 407 icount->rng++; 408 409 wake_up_interruptible(&port->port->port.delta_msr_wait); 410 } 411 } 412 413 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr) 414 { 415 struct async_icount *icount; 416 417 if (new_lsr & SERIAL_LSR_BI) { 418 /* 419 * Parity and Framing errors only count if they 420 * occur exclusive of a break being 421 * received. 422 */ 423 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI); 424 } 425 426 /* update input line counters */ 427 icount = &port->port->icount; 428 if (new_lsr & SERIAL_LSR_BI) 429 icount->brk++; 430 if (new_lsr & SERIAL_LSR_OE) 431 icount->overrun++; 432 if (new_lsr & SERIAL_LSR_PE) 433 icount->parity++; 434 if (new_lsr & SERIAL_LSR_FE) 435 icount->frame++; 436 } 437 438 /************************************************************************/ 439 /************************************************************************/ 440 /* U S B C A L L B A C K F U N C T I O N S */ 441 /* U S B C A L L B A C K F U N C T I O N S */ 442 /************************************************************************/ 443 /************************************************************************/ 444 445 static void mos7840_control_callback(struct urb *urb) 446 { 447 unsigned char *data; 448 struct moschip_port *mos7840_port; 449 struct device *dev = &urb->dev->dev; 450 __u8 regval = 0x0; 451 int status = urb->status; 452 453 mos7840_port = urb->context; 454 455 switch (status) { 456 case 0: 457 /* success */ 458 break; 459 case -ECONNRESET: 460 case -ENOENT: 461 case -ESHUTDOWN: 462 /* this urb is terminated, clean up */ 463 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status); 464 goto out; 465 default: 466 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status); 467 goto out; 468 } 469 470 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length); 471 if (urb->actual_length < 1) 472 goto out; 473 474 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(struct timer_list *t) 562 { 563 struct moschip_port *mcs = from_timer(mcs, t, led_timer1); 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(struct timer_list *t) 572 { 573 struct moschip_port *mcs = from_timer(mcs, t, led_timer2); 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 /* FIXME: Buffer never NULL, so URB is not submitted. */ 1028 if (serial->port[0]->interrupt_in_buffer == NULL) { 1029 /* set up interrupt urb */ 1030 usb_fill_int_urb(serial->port[0]->interrupt_in_urb, 1031 serial->dev, 1032 usb_rcvintpipe(serial->dev, 1033 serial->port[0]->interrupt_in_endpointAddress), 1034 serial->port[0]->interrupt_in_buffer, 1035 serial->port[0]->interrupt_in_urb-> 1036 transfer_buffer_length, 1037 mos7840_interrupt_callback, 1038 serial, 1039 serial->port[0]->interrupt_in_urb->interval); 1040 1041 /* start interrupt read for mos7840 */ 1042 response = 1043 usb_submit_urb(serial->port[0]->interrupt_in_urb, 1044 GFP_KERNEL); 1045 if (response) { 1046 dev_err(&port->dev, "%s - Error %d submitting " 1047 "interrupt urb\n", __func__, response); 1048 } 1049 1050 } 1051 1052 } 1053 1054 /* see if we've set up our endpoint info yet * 1055 * (can't set it up in mos7840_startup as the * 1056 * structures were not set up at that time.) */ 1057 1058 dev_dbg(&port->dev, "port number is %d\n", port->port_number); 1059 dev_dbg(&port->dev, "minor number is %d\n", port->minor); 1060 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress); 1061 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress); 1062 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress); 1063 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num); 1064 mos7840_port->read_urb = port->read_urb; 1065 1066 /* set up our bulk in urb */ 1067 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1068 usb_fill_bulk_urb(mos7840_port->read_urb, 1069 serial->dev, 1070 usb_rcvbulkpipe(serial->dev, 1071 (port->bulk_in_endpointAddress) + 2), 1072 port->bulk_in_buffer, 1073 mos7840_port->read_urb->transfer_buffer_length, 1074 mos7840_bulk_in_callback, mos7840_port); 1075 } else { 1076 usb_fill_bulk_urb(mos7840_port->read_urb, 1077 serial->dev, 1078 usb_rcvbulkpipe(serial->dev, 1079 port->bulk_in_endpointAddress), 1080 port->bulk_in_buffer, 1081 mos7840_port->read_urb->transfer_buffer_length, 1082 mos7840_bulk_in_callback, mos7840_port); 1083 } 1084 1085 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress); 1086 mos7840_port->read_urb_busy = true; 1087 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1088 if (response) { 1089 dev_err(&port->dev, "%s - Error %d submitting control urb\n", 1090 __func__, response); 1091 mos7840_port->read_urb_busy = false; 1092 } 1093 1094 /* initialize our port settings */ 1095 /* Must set to enable ints! */ 1096 mos7840_port->shadowMCR = MCR_MASTER_IE; 1097 /* send a open port command */ 1098 mos7840_port->open = 1; 1099 /* mos7840_change_port_settings(mos7840_port,old_termios); */ 1100 1101 return 0; 1102 err: 1103 for (j = 0; j < NUM_URBS; ++j) { 1104 urb = mos7840_port->write_urb_pool[j]; 1105 if (!urb) 1106 continue; 1107 kfree(urb->transfer_buffer); 1108 usb_free_urb(urb); 1109 } 1110 return status; 1111 } 1112 1113 /***************************************************************************** 1114 * mos7840_chars_in_buffer 1115 * this function is called by the tty driver when it wants to know how many 1116 * bytes of data we currently have outstanding in the port (data that has 1117 * been written, but hasn't made it out the port yet) 1118 * If successful, we return the number of bytes left to be written in the 1119 * system, 1120 * Otherwise we return zero. 1121 *****************************************************************************/ 1122 1123 static int mos7840_chars_in_buffer(struct tty_struct *tty) 1124 { 1125 struct usb_serial_port *port = tty->driver_data; 1126 int i; 1127 int chars = 0; 1128 unsigned long flags; 1129 struct moschip_port *mos7840_port; 1130 1131 if (mos7840_port_paranoia_check(port, __func__)) 1132 return 0; 1133 1134 mos7840_port = mos7840_get_port_private(port); 1135 if (mos7840_port == NULL) 1136 return 0; 1137 1138 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1139 for (i = 0; i < NUM_URBS; ++i) { 1140 if (mos7840_port->busy[i]) { 1141 struct urb *urb = mos7840_port->write_urb_pool[i]; 1142 chars += urb->transfer_buffer_length; 1143 } 1144 } 1145 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1146 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 1147 return chars; 1148 1149 } 1150 1151 /***************************************************************************** 1152 * mos7840_close 1153 * this function is called by the tty driver when a port is closed 1154 *****************************************************************************/ 1155 1156 static void mos7840_close(struct usb_serial_port *port) 1157 { 1158 struct usb_serial *serial; 1159 struct moschip_port *mos7840_port; 1160 struct moschip_port *port0; 1161 int j; 1162 __u16 Data; 1163 1164 if (mos7840_port_paranoia_check(port, __func__)) 1165 return; 1166 1167 serial = mos7840_get_usb_serial(port, __func__); 1168 if (!serial) 1169 return; 1170 1171 mos7840_port = mos7840_get_port_private(port); 1172 port0 = mos7840_get_port_private(serial->port[0]); 1173 1174 if (mos7840_port == NULL || port0 == NULL) 1175 return; 1176 1177 for (j = 0; j < NUM_URBS; ++j) 1178 usb_kill_urb(mos7840_port->write_urb_pool[j]); 1179 1180 /* Freeing Write URBs */ 1181 for (j = 0; j < NUM_URBS; ++j) { 1182 if (mos7840_port->write_urb_pool[j]) { 1183 kfree(mos7840_port->write_urb_pool[j]->transfer_buffer); 1184 usb_free_urb(mos7840_port->write_urb_pool[j]); 1185 } 1186 } 1187 1188 usb_kill_urb(mos7840_port->read_urb); 1189 mos7840_port->read_urb_busy = false; 1190 1191 port0->open_ports--; 1192 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports); 1193 if (port0->open_ports == 0) { 1194 if (serial->port[0]->interrupt_in_urb) { 1195 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n"); 1196 usb_kill_urb(serial->port[0]->interrupt_in_urb); 1197 } 1198 } 1199 1200 Data = 0x0; 1201 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1202 1203 Data = 0x00; 1204 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1205 1206 mos7840_port->open = 0; 1207 } 1208 1209 /***************************************************************************** 1210 * mos7840_break 1211 * this function sends a break to the port 1212 *****************************************************************************/ 1213 static void mos7840_break(struct tty_struct *tty, int break_state) 1214 { 1215 struct usb_serial_port *port = tty->driver_data; 1216 unsigned char data; 1217 struct usb_serial *serial; 1218 struct moschip_port *mos7840_port; 1219 1220 if (mos7840_port_paranoia_check(port, __func__)) 1221 return; 1222 1223 serial = mos7840_get_usb_serial(port, __func__); 1224 if (!serial) 1225 return; 1226 1227 mos7840_port = mos7840_get_port_private(port); 1228 1229 if (mos7840_port == NULL) 1230 return; 1231 1232 if (break_state == -1) 1233 data = mos7840_port->shadowLCR | LCR_SET_BREAK; 1234 else 1235 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; 1236 1237 /* FIXME: no locking on shadowLCR anywhere in driver */ 1238 mos7840_port->shadowLCR = data; 1239 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); 1240 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, 1241 mos7840_port->shadowLCR); 1242 } 1243 1244 /***************************************************************************** 1245 * mos7840_write_room 1246 * this function is called by the tty driver when it wants to know how many 1247 * bytes of data we can accept for a specific port. 1248 * If successful, we return the amount of room that we have for this port 1249 * Otherwise we return a negative error number. 1250 *****************************************************************************/ 1251 1252 static int mos7840_write_room(struct tty_struct *tty) 1253 { 1254 struct usb_serial_port *port = tty->driver_data; 1255 int i; 1256 int room = 0; 1257 unsigned long flags; 1258 struct moschip_port *mos7840_port; 1259 1260 if (mos7840_port_paranoia_check(port, __func__)) 1261 return -1; 1262 1263 mos7840_port = mos7840_get_port_private(port); 1264 if (mos7840_port == NULL) 1265 return -1; 1266 1267 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1268 for (i = 0; i < NUM_URBS; ++i) { 1269 if (!mos7840_port->busy[i]) 1270 room += URB_TRANSFER_BUFFER_SIZE; 1271 } 1272 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1273 1274 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; 1275 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); 1276 return room; 1277 1278 } 1279 1280 /***************************************************************************** 1281 * mos7840_write 1282 * this function is called by the tty driver when data should be written to 1283 * the port. 1284 * If successful, we return the number of bytes written, otherwise we 1285 * return a negative error number. 1286 *****************************************************************************/ 1287 1288 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 1289 const unsigned char *data, int count) 1290 { 1291 int status; 1292 int i; 1293 int bytes_sent = 0; 1294 int transfer_size; 1295 unsigned long flags; 1296 1297 struct moschip_port *mos7840_port; 1298 struct usb_serial *serial; 1299 struct urb *urb; 1300 /* __u16 Data; */ 1301 const unsigned char *current_position = data; 1302 unsigned char *data1; 1303 1304 if (mos7840_port_paranoia_check(port, __func__)) 1305 return -1; 1306 1307 serial = port->serial; 1308 if (mos7840_serial_paranoia_check(serial, __func__)) 1309 return -1; 1310 1311 mos7840_port = mos7840_get_port_private(port); 1312 if (mos7840_port == NULL) 1313 return -1; 1314 1315 /* try to find a free urb in the list */ 1316 urb = NULL; 1317 1318 spin_lock_irqsave(&mos7840_port->pool_lock, flags); 1319 for (i = 0; i < NUM_URBS; ++i) { 1320 if (!mos7840_port->busy[i]) { 1321 mos7840_port->busy[i] = 1; 1322 urb = mos7840_port->write_urb_pool[i]; 1323 dev_dbg(&port->dev, "URB:%d\n", i); 1324 break; 1325 } 1326 } 1327 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); 1328 1329 if (urb == NULL) { 1330 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); 1331 goto exit; 1332 } 1333 1334 if (urb->transfer_buffer == NULL) { 1335 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, 1336 GFP_ATOMIC); 1337 if (!urb->transfer_buffer) 1338 goto exit; 1339 } 1340 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); 1341 1342 memcpy(urb->transfer_buffer, current_position, transfer_size); 1343 1344 /* fill urb with data and submit */ 1345 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { 1346 usb_fill_bulk_urb(urb, 1347 serial->dev, 1348 usb_sndbulkpipe(serial->dev, 1349 (port->bulk_out_endpointAddress) + 2), 1350 urb->transfer_buffer, 1351 transfer_size, 1352 mos7840_bulk_out_data_callback, mos7840_port); 1353 } else { 1354 usb_fill_bulk_urb(urb, 1355 serial->dev, 1356 usb_sndbulkpipe(serial->dev, 1357 port->bulk_out_endpointAddress), 1358 urb->transfer_buffer, 1359 transfer_size, 1360 mos7840_bulk_out_data_callback, mos7840_port); 1361 } 1362 1363 data1 = urb->transfer_buffer; 1364 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); 1365 1366 if (mos7840_port->has_led) 1367 mos7840_led_activity(port); 1368 1369 /* send it down the pipe */ 1370 status = usb_submit_urb(urb, GFP_ATOMIC); 1371 1372 if (status) { 1373 mos7840_port->busy[i] = 0; 1374 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " 1375 "with status = %d\n", __func__, status); 1376 bytes_sent = status; 1377 goto exit; 1378 } 1379 bytes_sent = transfer_size; 1380 port->icount.tx += transfer_size; 1381 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx); 1382 exit: 1383 return bytes_sent; 1384 1385 } 1386 1387 /***************************************************************************** 1388 * mos7840_throttle 1389 * this function is called by the tty driver when it wants to stop the data 1390 * being read from the port. 1391 *****************************************************************************/ 1392 1393 static void mos7840_throttle(struct tty_struct *tty) 1394 { 1395 struct usb_serial_port *port = tty->driver_data; 1396 struct moschip_port *mos7840_port; 1397 int status; 1398 1399 if (mos7840_port_paranoia_check(port, __func__)) 1400 return; 1401 1402 mos7840_port = mos7840_get_port_private(port); 1403 1404 if (mos7840_port == NULL) 1405 return; 1406 1407 if (!mos7840_port->open) { 1408 dev_dbg(&port->dev, "%s", "port not opened\n"); 1409 return; 1410 } 1411 1412 /* if we are implementing XON/XOFF, send the stop character */ 1413 if (I_IXOFF(tty)) { 1414 unsigned char stop_char = STOP_CHAR(tty); 1415 status = mos7840_write(tty, port, &stop_char, 1); 1416 if (status <= 0) 1417 return; 1418 } 1419 /* if we are implementing RTS/CTS, toggle that line */ 1420 if (C_CRTSCTS(tty)) { 1421 mos7840_port->shadowMCR &= ~MCR_RTS; 1422 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1423 mos7840_port->shadowMCR); 1424 if (status < 0) 1425 return; 1426 } 1427 } 1428 1429 /***************************************************************************** 1430 * mos7840_unthrottle 1431 * this function is called by the tty driver when it wants to resume 1432 * the data being read from the port (called after mos7840_throttle is 1433 * called) 1434 *****************************************************************************/ 1435 static void mos7840_unthrottle(struct tty_struct *tty) 1436 { 1437 struct usb_serial_port *port = tty->driver_data; 1438 int status; 1439 struct moschip_port *mos7840_port = mos7840_get_port_private(port); 1440 1441 if (mos7840_port_paranoia_check(port, __func__)) 1442 return; 1443 1444 if (mos7840_port == NULL) 1445 return; 1446 1447 if (!mos7840_port->open) { 1448 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1449 return; 1450 } 1451 1452 /* if we are implementing XON/XOFF, send the start character */ 1453 if (I_IXOFF(tty)) { 1454 unsigned char start_char = START_CHAR(tty); 1455 status = mos7840_write(tty, port, &start_char, 1); 1456 if (status <= 0) 1457 return; 1458 } 1459 1460 /* if we are implementing RTS/CTS, toggle that line */ 1461 if (C_CRTSCTS(tty)) { 1462 mos7840_port->shadowMCR |= MCR_RTS; 1463 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1464 mos7840_port->shadowMCR); 1465 if (status < 0) 1466 return; 1467 } 1468 } 1469 1470 static int mos7840_tiocmget(struct tty_struct *tty) 1471 { 1472 struct usb_serial_port *port = tty->driver_data; 1473 struct moschip_port *mos7840_port; 1474 unsigned int result; 1475 __u16 msr; 1476 __u16 mcr; 1477 int status; 1478 mos7840_port = mos7840_get_port_private(port); 1479 1480 if (mos7840_port == NULL) 1481 return -ENODEV; 1482 1483 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); 1484 if (status < 0) 1485 return -EIO; 1486 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); 1487 if (status < 0) 1488 return -EIO; 1489 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) 1490 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) 1491 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) 1492 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) 1493 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) 1494 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) 1495 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); 1496 1497 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); 1498 1499 return result; 1500 } 1501 1502 static int mos7840_tiocmset(struct tty_struct *tty, 1503 unsigned int set, unsigned int clear) 1504 { 1505 struct usb_serial_port *port = tty->driver_data; 1506 struct moschip_port *mos7840_port; 1507 unsigned int mcr; 1508 int status; 1509 1510 mos7840_port = mos7840_get_port_private(port); 1511 1512 if (mos7840_port == NULL) 1513 return -ENODEV; 1514 1515 /* FIXME: What locks the port registers ? */ 1516 mcr = mos7840_port->shadowMCR; 1517 if (clear & TIOCM_RTS) 1518 mcr &= ~MCR_RTS; 1519 if (clear & TIOCM_DTR) 1520 mcr &= ~MCR_DTR; 1521 if (clear & TIOCM_LOOP) 1522 mcr &= ~MCR_LOOPBACK; 1523 1524 if (set & TIOCM_RTS) 1525 mcr |= MCR_RTS; 1526 if (set & TIOCM_DTR) 1527 mcr |= MCR_DTR; 1528 if (set & TIOCM_LOOP) 1529 mcr |= MCR_LOOPBACK; 1530 1531 mos7840_port->shadowMCR = mcr; 1532 1533 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); 1534 if (status < 0) { 1535 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); 1536 return status; 1537 } 1538 1539 return 0; 1540 } 1541 1542 /***************************************************************************** 1543 * mos7840_calc_baud_rate_divisor 1544 * this function calculates the proper baud rate divisor for the specified 1545 * baud rate. 1546 *****************************************************************************/ 1547 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, 1548 int baudRate, int *divisor, 1549 __u16 *clk_sel_val) 1550 { 1551 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); 1552 1553 if (baudRate <= 115200) { 1554 *divisor = 115200 / baudRate; 1555 *clk_sel_val = 0x0; 1556 } 1557 if ((baudRate > 115200) && (baudRate <= 230400)) { 1558 *divisor = 230400 / baudRate; 1559 *clk_sel_val = 0x10; 1560 } else if ((baudRate > 230400) && (baudRate <= 403200)) { 1561 *divisor = 403200 / baudRate; 1562 *clk_sel_val = 0x20; 1563 } else if ((baudRate > 403200) && (baudRate <= 460800)) { 1564 *divisor = 460800 / baudRate; 1565 *clk_sel_val = 0x30; 1566 } else if ((baudRate > 460800) && (baudRate <= 806400)) { 1567 *divisor = 806400 / baudRate; 1568 *clk_sel_val = 0x40; 1569 } else if ((baudRate > 806400) && (baudRate <= 921600)) { 1570 *divisor = 921600 / baudRate; 1571 *clk_sel_val = 0x50; 1572 } else if ((baudRate > 921600) && (baudRate <= 1572864)) { 1573 *divisor = 1572864 / baudRate; 1574 *clk_sel_val = 0x60; 1575 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { 1576 *divisor = 3145728 / baudRate; 1577 *clk_sel_val = 0x70; 1578 } 1579 return 0; 1580 } 1581 1582 /***************************************************************************** 1583 * mos7840_send_cmd_write_baud_rate 1584 * this function sends the proper command to change the baud rate of the 1585 * specified port. 1586 *****************************************************************************/ 1587 1588 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, 1589 int baudRate) 1590 { 1591 int divisor = 0; 1592 int status; 1593 __u16 Data; 1594 unsigned char number; 1595 __u16 clk_sel_val; 1596 struct usb_serial_port *port; 1597 1598 if (mos7840_port == NULL) 1599 return -1; 1600 1601 port = mos7840_port->port; 1602 if (mos7840_port_paranoia_check(port, __func__)) 1603 return -1; 1604 1605 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1606 return -1; 1607 1608 number = mos7840_port->port->port_number; 1609 1610 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate); 1611 /* reset clk_uart_sel in spregOffset */ 1612 if (baudRate > 115200) { 1613 #ifdef HW_flow_control 1614 /* NOTE: need to see the pther register to modify */ 1615 /* setting h/w flow control bit to 1 */ 1616 Data = 0x2b; 1617 mos7840_port->shadowMCR = Data; 1618 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1619 Data); 1620 if (status < 0) { 1621 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1622 return -1; 1623 } 1624 #endif 1625 1626 } else { 1627 #ifdef HW_flow_control 1628 /* setting h/w flow control bit to 0 */ 1629 Data = 0xb; 1630 mos7840_port->shadowMCR = Data; 1631 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, 1632 Data); 1633 if (status < 0) { 1634 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1635 return -1; 1636 } 1637 #endif 1638 1639 } 1640 1641 if (1) { /* baudRate <= 115200) */ 1642 clk_sel_val = 0x0; 1643 Data = 0x0; 1644 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, 1645 &clk_sel_val); 1646 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, 1647 &Data); 1648 if (status < 0) { 1649 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); 1650 return -1; 1651 } 1652 Data = (Data & 0x8f) | clk_sel_val; 1653 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, 1654 Data); 1655 if (status < 0) { 1656 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); 1657 return -1; 1658 } 1659 /* Calculate the Divisor */ 1660 1661 if (status) { 1662 dev_err(&port->dev, "%s - bad baud rate\n", __func__); 1663 return status; 1664 } 1665 /* Enable access to divisor latch */ 1666 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; 1667 mos7840_port->shadowLCR = Data; 1668 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1669 1670 /* Write the divisor */ 1671 Data = (unsigned char)(divisor & 0xff); 1672 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); 1673 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); 1674 1675 Data = (unsigned char)((divisor & 0xff00) >> 8); 1676 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); 1677 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); 1678 1679 /* Disable access to divisor latch */ 1680 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; 1681 mos7840_port->shadowLCR = Data; 1682 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1683 1684 } 1685 return status; 1686 } 1687 1688 /***************************************************************************** 1689 * mos7840_change_port_settings 1690 * This routine is called to set the UART on the device to match 1691 * the specified new settings. 1692 *****************************************************************************/ 1693 1694 static void mos7840_change_port_settings(struct tty_struct *tty, 1695 struct moschip_port *mos7840_port, struct ktermios *old_termios) 1696 { 1697 int baud; 1698 unsigned cflag; 1699 unsigned iflag; 1700 __u8 lData; 1701 __u8 lParity; 1702 __u8 lStop; 1703 int status; 1704 __u16 Data; 1705 struct usb_serial_port *port; 1706 struct usb_serial *serial; 1707 1708 if (mos7840_port == NULL) 1709 return; 1710 1711 port = mos7840_port->port; 1712 1713 if (mos7840_port_paranoia_check(port, __func__)) 1714 return; 1715 1716 if (mos7840_serial_paranoia_check(port->serial, __func__)) 1717 return; 1718 1719 serial = port->serial; 1720 1721 if (!mos7840_port->open) { 1722 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1723 return; 1724 } 1725 1726 lData = LCR_BITS_8; 1727 lStop = LCR_STOP_1; 1728 lParity = LCR_PAR_NONE; 1729 1730 cflag = tty->termios.c_cflag; 1731 iflag = tty->termios.c_iflag; 1732 1733 /* Change the number of bits */ 1734 switch (cflag & CSIZE) { 1735 case CS5: 1736 lData = LCR_BITS_5; 1737 break; 1738 1739 case CS6: 1740 lData = LCR_BITS_6; 1741 break; 1742 1743 case CS7: 1744 lData = LCR_BITS_7; 1745 break; 1746 1747 default: 1748 case CS8: 1749 lData = LCR_BITS_8; 1750 break; 1751 } 1752 1753 /* Change the Parity bit */ 1754 if (cflag & PARENB) { 1755 if (cflag & PARODD) { 1756 lParity = LCR_PAR_ODD; 1757 dev_dbg(&port->dev, "%s - parity = odd\n", __func__); 1758 } else { 1759 lParity = LCR_PAR_EVEN; 1760 dev_dbg(&port->dev, "%s - parity = even\n", __func__); 1761 } 1762 1763 } else { 1764 dev_dbg(&port->dev, "%s - parity = none\n", __func__); 1765 } 1766 1767 if (cflag & CMSPAR) 1768 lParity = lParity | 0x20; 1769 1770 /* Change the Stop bit */ 1771 if (cflag & CSTOPB) { 1772 lStop = LCR_STOP_2; 1773 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); 1774 } else { 1775 lStop = LCR_STOP_1; 1776 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); 1777 } 1778 1779 /* Update the LCR with the correct value */ 1780 mos7840_port->shadowLCR &= 1781 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); 1782 mos7840_port->shadowLCR |= (lData | lParity | lStop); 1783 1784 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, 1785 mos7840_port->shadowLCR); 1786 /* Disable Interrupts */ 1787 Data = 0x00; 1788 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1789 1790 Data = 0x00; 1791 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1792 1793 Data = 0xcf; 1794 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); 1795 1796 /* Send the updated LCR value to the mos7840 */ 1797 Data = mos7840_port->shadowLCR; 1798 1799 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); 1800 1801 Data = 0x00b; 1802 mos7840_port->shadowMCR = Data; 1803 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1804 Data = 0x00b; 1805 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1806 1807 /* set up the MCR register and send it to the mos7840 */ 1808 1809 mos7840_port->shadowMCR = MCR_MASTER_IE; 1810 if (cflag & CBAUD) 1811 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); 1812 1813 if (cflag & CRTSCTS) 1814 mos7840_port->shadowMCR |= (MCR_XON_ANY); 1815 else 1816 mos7840_port->shadowMCR &= ~(MCR_XON_ANY); 1817 1818 Data = mos7840_port->shadowMCR; 1819 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); 1820 1821 /* Determine divisor based on baud rate */ 1822 baud = tty_get_baud_rate(tty); 1823 1824 if (!baud) { 1825 /* pick a default, any default... */ 1826 dev_dbg(&port->dev, "%s", "Picked default baud...\n"); 1827 baud = 9600; 1828 } 1829 1830 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); 1831 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); 1832 1833 /* Enable Interrupts */ 1834 Data = 0x0c; 1835 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); 1836 1837 if (!mos7840_port->read_urb_busy) { 1838 mos7840_port->read_urb_busy = true; 1839 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1840 if (status) { 1841 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1842 status); 1843 mos7840_port->read_urb_busy = false; 1844 } 1845 } 1846 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, 1847 mos7840_port->shadowLCR); 1848 } 1849 1850 /***************************************************************************** 1851 * mos7840_set_termios 1852 * this function is called by the tty driver when it wants to change 1853 * the termios structure 1854 *****************************************************************************/ 1855 1856 static void mos7840_set_termios(struct tty_struct *tty, 1857 struct usb_serial_port *port, 1858 struct ktermios *old_termios) 1859 { 1860 int status; 1861 struct usb_serial *serial; 1862 struct moschip_port *mos7840_port; 1863 1864 if (mos7840_port_paranoia_check(port, __func__)) 1865 return; 1866 1867 serial = port->serial; 1868 1869 if (mos7840_serial_paranoia_check(serial, __func__)) 1870 return; 1871 1872 mos7840_port = mos7840_get_port_private(port); 1873 1874 if (mos7840_port == NULL) 1875 return; 1876 1877 if (!mos7840_port->open) { 1878 dev_dbg(&port->dev, "%s - port not opened\n", __func__); 1879 return; 1880 } 1881 1882 /* change the port settings to the new ones specified */ 1883 1884 mos7840_change_port_settings(tty, mos7840_port, old_termios); 1885 1886 if (!mos7840_port->read_urb) { 1887 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n"); 1888 return; 1889 } 1890 1891 if (!mos7840_port->read_urb_busy) { 1892 mos7840_port->read_urb_busy = true; 1893 status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); 1894 if (status) { 1895 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", 1896 status); 1897 mos7840_port->read_urb_busy = false; 1898 } 1899 } 1900 } 1901 1902 /***************************************************************************** 1903 * mos7840_get_lsr_info - get line status register info 1904 * 1905 * Purpose: Let user call ioctl() to get info when the UART physically 1906 * is emptied. On bus types like RS485, the transmitter must 1907 * release the bus after transmitting. This must be done when 1908 * the transmit shift register is empty, not be done when the 1909 * transmit holding register is empty. This functionality 1910 * allows an RS485 driver to be written in user space. 1911 *****************************************************************************/ 1912 1913 static int mos7840_get_lsr_info(struct tty_struct *tty, 1914 unsigned int __user *value) 1915 { 1916 int count; 1917 unsigned int result = 0; 1918 1919 count = mos7840_chars_in_buffer(tty); 1920 if (count == 0) 1921 result = TIOCSER_TEMT; 1922 1923 if (copy_to_user(value, &result, sizeof(int))) 1924 return -EFAULT; 1925 return 0; 1926 } 1927 1928 /***************************************************************************** 1929 * mos7840_get_serial_info 1930 * function to get information about serial port 1931 *****************************************************************************/ 1932 1933 static int mos7840_get_serial_info(struct moschip_port *mos7840_port, 1934 struct serial_struct __user *retinfo) 1935 { 1936 struct serial_struct tmp; 1937 1938 if (mos7840_port == NULL) 1939 return -1; 1940 1941 memset(&tmp, 0, sizeof(tmp)); 1942 1943 tmp.type = PORT_16550A; 1944 tmp.line = mos7840_port->port->minor; 1945 tmp.port = mos7840_port->port->port_number; 1946 tmp.irq = 0; 1947 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; 1948 tmp.baud_base = 9600; 1949 tmp.close_delay = 5 * HZ; 1950 tmp.closing_wait = 30 * HZ; 1951 1952 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 1953 return -EFAULT; 1954 return 0; 1955 } 1956 1957 /***************************************************************************** 1958 * SerialIoctl 1959 * this function handles any ioctl calls to the driver 1960 *****************************************************************************/ 1961 1962 static int mos7840_ioctl(struct tty_struct *tty, 1963 unsigned int cmd, unsigned long arg) 1964 { 1965 struct usb_serial_port *port = tty->driver_data; 1966 void __user *argp = (void __user *)arg; 1967 struct moschip_port *mos7840_port; 1968 1969 if (mos7840_port_paranoia_check(port, __func__)) 1970 return -1; 1971 1972 mos7840_port = mos7840_get_port_private(port); 1973 1974 if (mos7840_port == NULL) 1975 return -1; 1976 1977 switch (cmd) { 1978 /* return number of bytes available */ 1979 1980 case TIOCSERGETLSR: 1981 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); 1982 return mos7840_get_lsr_info(tty, argp); 1983 1984 case TIOCGSERIAL: 1985 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__); 1986 return mos7840_get_serial_info(mos7840_port, argp); 1987 1988 case TIOCSSERIAL: 1989 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__); 1990 break; 1991 default: 1992 break; 1993 } 1994 return -ENOIOCTLCMD; 1995 } 1996 1997 static int mos7810_check(struct usb_serial *serial) 1998 { 1999 int i, pass_count = 0; 2000 u8 *buf; 2001 __u16 data = 0, mcr_data = 0; 2002 __u16 test_pattern = 0x55AA; 2003 int res; 2004 2005 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2006 if (!buf) 2007 return 0; /* failed to identify 7810 */ 2008 2009 /* Store MCR setting */ 2010 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2011 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, 2012 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2013 if (res == VENDOR_READ_LENGTH) 2014 mcr_data = *buf; 2015 2016 for (i = 0; i < 16; i++) { 2017 /* Send the 1-bit test pattern out to MCS7810 test pin */ 2018 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2019 MCS_WRREQ, MCS_WR_RTYPE, 2020 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), 2021 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); 2022 2023 /* Read the test pattern back */ 2024 res = usb_control_msg(serial->dev, 2025 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, 2026 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2027 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2028 if (res == VENDOR_READ_LENGTH) 2029 data = *buf; 2030 2031 /* If this is a MCS7810 device, both test patterns must match */ 2032 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) 2033 break; 2034 2035 pass_count++; 2036 } 2037 2038 /* Restore MCR setting */ 2039 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, 2040 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 2041 0, MOS_WDR_TIMEOUT); 2042 2043 kfree(buf); 2044 2045 if (pass_count == 16) 2046 return 1; 2047 2048 return 0; 2049 } 2050 2051 static int mos7840_probe(struct usb_serial *serial, 2052 const struct usb_device_id *id) 2053 { 2054 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct); 2055 u8 *buf; 2056 int device_type; 2057 2058 if (product == MOSCHIP_DEVICE_ID_7810 || 2059 product == MOSCHIP_DEVICE_ID_7820) { 2060 device_type = product; 2061 goto out; 2062 } 2063 2064 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL); 2065 if (!buf) 2066 return -ENOMEM; 2067 2068 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 2069 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, 2070 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); 2071 2072 /* For a MCS7840 device GPIO0 must be set to 1 */ 2073 if (buf[0] & 0x01) 2074 device_type = MOSCHIP_DEVICE_ID_7840; 2075 else if (mos7810_check(serial)) 2076 device_type = MOSCHIP_DEVICE_ID_7810; 2077 else 2078 device_type = MOSCHIP_DEVICE_ID_7820; 2079 2080 kfree(buf); 2081 out: 2082 usb_set_serial_data(serial, (void *)(unsigned long)device_type); 2083 2084 return 0; 2085 } 2086 2087 static int mos7840_calc_num_ports(struct usb_serial *serial, 2088 struct usb_serial_endpoints *epds) 2089 { 2090 int device_type = (unsigned long)usb_get_serial_data(serial); 2091 int num_ports; 2092 2093 num_ports = (device_type >> 4) & 0x000F; 2094 2095 /* 2096 * num_ports is currently never zero as device_type is one of 2097 * MOSCHIP_DEVICE_ID_78{1,2,4}0. 2098 */ 2099 if (num_ports == 0) 2100 return -ENODEV; 2101 2102 if (epds->num_bulk_in < num_ports || epds->num_bulk_out < num_ports) { 2103 dev_err(&serial->interface->dev, "missing endpoints\n"); 2104 return -ENODEV; 2105 } 2106 2107 return num_ports; 2108 } 2109 2110 static int mos7840_port_probe(struct usb_serial_port *port) 2111 { 2112 struct usb_serial *serial = port->serial; 2113 int device_type = (unsigned long)usb_get_serial_data(serial); 2114 struct moschip_port *mos7840_port; 2115 int status; 2116 int pnum; 2117 __u16 Data; 2118 2119 /* we set up the pointers to the endpoints in the mos7840_open * 2120 * function, as the structures aren't created yet. */ 2121 2122 pnum = port->port_number; 2123 2124 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); 2125 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); 2126 if (!mos7840_port) 2127 return -ENOMEM; 2128 2129 /* Initialize all port interrupt end point to port 0 int 2130 * endpoint. Our device has only one interrupt end point 2131 * common to all port */ 2132 2133 mos7840_port->port = port; 2134 mos7840_set_port_private(port, mos7840_port); 2135 spin_lock_init(&mos7840_port->pool_lock); 2136 2137 /* minor is not initialised until later by 2138 * usb-serial.c:get_free_serial() and cannot therefore be used 2139 * to index device instances */ 2140 mos7840_port->port_num = pnum + 1; 2141 dev_dbg(&port->dev, "port->minor = %d\n", port->minor); 2142 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); 2143 2144 if (mos7840_port->port_num == 1) { 2145 mos7840_port->SpRegOffset = 0x0; 2146 mos7840_port->ControlRegOffset = 0x1; 2147 mos7840_port->DcrRegOffset = 0x4; 2148 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) { 2149 mos7840_port->SpRegOffset = 0x8; 2150 mos7840_port->ControlRegOffset = 0x9; 2151 mos7840_port->DcrRegOffset = 0x16; 2152 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) { 2153 mos7840_port->SpRegOffset = 0xa; 2154 mos7840_port->ControlRegOffset = 0xb; 2155 mos7840_port->DcrRegOffset = 0x19; 2156 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) { 2157 mos7840_port->SpRegOffset = 0xa; 2158 mos7840_port->ControlRegOffset = 0xb; 2159 mos7840_port->DcrRegOffset = 0x19; 2160 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) { 2161 mos7840_port->SpRegOffset = 0xc; 2162 mos7840_port->ControlRegOffset = 0xd; 2163 mos7840_port->DcrRegOffset = 0x1c; 2164 } 2165 mos7840_dump_serial_port(port, mos7840_port); 2166 mos7840_set_port_private(port, mos7840_port); 2167 2168 /* enable rx_disable bit in control register */ 2169 status = mos7840_get_reg_sync(port, 2170 mos7840_port->ControlRegOffset, &Data); 2171 if (status < 0) { 2172 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); 2173 goto out; 2174 } else 2175 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); 2176 Data |= 0x08; /* setting driver done bit */ 2177 Data |= 0x04; /* sp1_bit to have cts change reflect in 2178 modem status reg */ 2179 2180 /* Data |= 0x20; //rx_disable bit */ 2181 status = mos7840_set_reg_sync(port, 2182 mos7840_port->ControlRegOffset, Data); 2183 if (status < 0) { 2184 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); 2185 goto out; 2186 } else 2187 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); 2188 2189 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 2190 and 0x24 in DCR3 */ 2191 Data = 0x01; 2192 status = mos7840_set_reg_sync(port, 2193 (__u16) (mos7840_port->DcrRegOffset + 0), Data); 2194 if (status < 0) { 2195 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); 2196 goto out; 2197 } else 2198 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); 2199 2200 Data = 0x05; 2201 status = mos7840_set_reg_sync(port, 2202 (__u16) (mos7840_port->DcrRegOffset + 1), Data); 2203 if (status < 0) { 2204 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); 2205 goto out; 2206 } else 2207 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); 2208 2209 Data = 0x24; 2210 status = mos7840_set_reg_sync(port, 2211 (__u16) (mos7840_port->DcrRegOffset + 2), Data); 2212 if (status < 0) { 2213 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); 2214 goto out; 2215 } else 2216 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); 2217 2218 /* write values in clkstart0x0 and clkmulti 0x20 */ 2219 Data = 0x0; 2220 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); 2221 if (status < 0) { 2222 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); 2223 goto out; 2224 } else 2225 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); 2226 2227 Data = 0x20; 2228 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); 2229 if (status < 0) { 2230 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); 2231 goto error; 2232 } else 2233 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); 2234 2235 /* write value 0x0 to scratchpad register */ 2236 Data = 0x00; 2237 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); 2238 if (status < 0) { 2239 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); 2240 goto out; 2241 } else 2242 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); 2243 2244 /* Zero Length flag register */ 2245 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { 2246 Data = 0xff; 2247 status = mos7840_set_reg_sync(port, 2248 (__u16) (ZLP_REG1 + 2249 ((__u16)mos7840_port->port_num)), Data); 2250 dev_dbg(&port->dev, "ZLIP offset %x\n", 2251 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); 2252 if (status < 0) { 2253 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); 2254 goto out; 2255 } else 2256 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); 2257 } else { 2258 Data = 0xff; 2259 status = mos7840_set_reg_sync(port, 2260 (__u16) (ZLP_REG1 + 2261 ((__u16)mos7840_port->port_num) - 0x1), Data); 2262 dev_dbg(&port->dev, "ZLIP offset %x\n", 2263 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); 2264 if (status < 0) { 2265 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); 2266 goto out; 2267 } else 2268 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); 2269 2270 } 2271 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL); 2272 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL); 2273 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest), 2274 GFP_KERNEL); 2275 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf || 2276 !mos7840_port->dr) { 2277 status = -ENOMEM; 2278 goto error; 2279 } 2280 2281 mos7840_port->has_led = false; 2282 2283 /* Initialize LED timers */ 2284 if (device_type == MOSCHIP_DEVICE_ID_7810) { 2285 mos7840_port->has_led = true; 2286 2287 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL); 2288 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr), 2289 GFP_KERNEL); 2290 if (!mos7840_port->led_urb || !mos7840_port->led_dr) { 2291 status = -ENOMEM; 2292 goto error; 2293 } 2294 2295 timer_setup(&mos7840_port->led_timer1, mos7840_led_off, 0); 2296 mos7840_port->led_timer1.expires = 2297 jiffies + msecs_to_jiffies(LED_ON_MS); 2298 timer_setup(&mos7840_port->led_timer2, mos7840_led_flag_off, 2299 0); 2300 mos7840_port->led_timer2.expires = 2301 jiffies + msecs_to_jiffies(LED_OFF_MS); 2302 2303 /* Turn off LED */ 2304 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2305 } 2306 out: 2307 if (pnum == serial->num_ports - 1) { 2308 /* Zero Length flag enable */ 2309 Data = 0x0f; 2310 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data); 2311 if (status < 0) { 2312 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status); 2313 goto error; 2314 } else 2315 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status); 2316 2317 /* setting configuration feature to one */ 2318 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 2319 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 2320 MOS_WDR_TIMEOUT); 2321 } 2322 return 0; 2323 error: 2324 kfree(mos7840_port->led_dr); 2325 usb_free_urb(mos7840_port->led_urb); 2326 kfree(mos7840_port->dr); 2327 kfree(mos7840_port->ctrl_buf); 2328 usb_free_urb(mos7840_port->control_urb); 2329 kfree(mos7840_port); 2330 2331 return status; 2332 } 2333 2334 static int mos7840_port_remove(struct usb_serial_port *port) 2335 { 2336 struct moschip_port *mos7840_port; 2337 2338 mos7840_port = mos7840_get_port_private(port); 2339 2340 if (mos7840_port->has_led) { 2341 /* Turn off LED */ 2342 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); 2343 2344 del_timer_sync(&mos7840_port->led_timer1); 2345 del_timer_sync(&mos7840_port->led_timer2); 2346 2347 usb_kill_urb(mos7840_port->led_urb); 2348 usb_free_urb(mos7840_port->led_urb); 2349 kfree(mos7840_port->led_dr); 2350 } 2351 usb_kill_urb(mos7840_port->control_urb); 2352 usb_free_urb(mos7840_port->control_urb); 2353 kfree(mos7840_port->ctrl_buf); 2354 kfree(mos7840_port->dr); 2355 kfree(mos7840_port); 2356 2357 return 0; 2358 } 2359 2360 static struct usb_serial_driver moschip7840_4port_device = { 2361 .driver = { 2362 .owner = THIS_MODULE, 2363 .name = "mos7840", 2364 }, 2365 .description = DRIVER_DESC, 2366 .id_table = id_table, 2367 .num_interrupt_in = 1, 2368 .open = mos7840_open, 2369 .close = mos7840_close, 2370 .write = mos7840_write, 2371 .write_room = mos7840_write_room, 2372 .chars_in_buffer = mos7840_chars_in_buffer, 2373 .throttle = mos7840_throttle, 2374 .unthrottle = mos7840_unthrottle, 2375 .calc_num_ports = mos7840_calc_num_ports, 2376 .probe = mos7840_probe, 2377 .ioctl = mos7840_ioctl, 2378 .set_termios = mos7840_set_termios, 2379 .break_ctl = mos7840_break, 2380 .tiocmget = mos7840_tiocmget, 2381 .tiocmset = mos7840_tiocmset, 2382 .tiocmiwait = usb_serial_generic_tiocmiwait, 2383 .get_icount = usb_serial_generic_get_icount, 2384 .port_probe = mos7840_port_probe, 2385 .port_remove = mos7840_port_remove, 2386 .read_bulk_callback = mos7840_bulk_in_callback, 2387 .read_int_callback = mos7840_interrupt_callback, 2388 }; 2389 2390 static struct usb_serial_driver * const serial_drivers[] = { 2391 &moschip7840_4port_device, NULL 2392 }; 2393 2394 module_usb_serial_driver(serial_drivers, id_table); 2395 2396 MODULE_DESCRIPTION(DRIVER_DESC); 2397 MODULE_LICENSE("GPL"); 2398