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