io_ti.c revision 2742fd8899328345d97a3443fb787b051b79ebae
1/* 2 * Edgeport USB Serial Converter driver 3 * 4 * Copyright (C) 2000-2002 Inside Out Networks, All rights reserved. 5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * Supports the following devices: 13 * EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT 14 * 15 * For questions or problems with this driver, contact Inside Out 16 * Networks technical support, or Peter Berger <pberger@brimson.com>, 17 * or Al Borchers <alborchers@steinerpoint.com>. 18 * 19 * Version history: 20 * 21 * July 11, 2002 Removed 4 port device structure since all TI UMP 22 * chips have only 2 ports 23 * David Iacovelli (davidi@ionetworks.com) 24 * 25 */ 26 27#include <linux/kernel.h> 28#include <linux/jiffies.h> 29#include <linux/errno.h> 30#include <linux/init.h> 31#include <linux/slab.h> 32#include <linux/tty.h> 33#include <linux/tty_driver.h> 34#include <linux/tty_flip.h> 35#include <linux/module.h> 36#include <linux/spinlock.h> 37#include <linux/mutex.h> 38#include <linux/serial.h> 39#include <linux/ioctl.h> 40#include <linux/firmware.h> 41#include <linux/uaccess.h> 42#include <linux/usb.h> 43#include <linux/usb/serial.h> 44 45#include "io_16654.h" 46#include "io_usbvend.h" 47#include "io_ti.h" 48 49/* 50 * Version Information 51 */ 52#define DRIVER_VERSION "v0.7mode043006" 53#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" 54#define DRIVER_DESC "Edgeport USB Serial Driver" 55 56#define EPROM_PAGE_SIZE 64 57 58 59struct edgeport_uart_buf_desc { 60 __u32 count; /* Number of bytes currently in buffer */ 61}; 62 63/* different hardware types */ 64#define HARDWARE_TYPE_930 0 65#define HARDWARE_TYPE_TIUMP 1 66 67/* IOCTL_PRIVATE_TI_GET_MODE Definitions */ 68#define TI_MODE_CONFIGURING 0 /* Device has not entered start device */ 69#define TI_MODE_BOOT 1 /* Staying in boot mode */ 70#define TI_MODE_DOWNLOAD 2 /* Made it to download mode */ 71#define TI_MODE_TRANSITIONING 3 /* Currently in boot mode but 72 transitioning to download mode */ 73 74/* read urb state */ 75#define EDGE_READ_URB_RUNNING 0 76#define EDGE_READ_URB_STOPPING 1 77#define EDGE_READ_URB_STOPPED 2 78 79#define EDGE_LOW_LATENCY 1 80#define EDGE_CLOSING_WAIT 4000 /* in .01 sec */ 81 82#define EDGE_OUT_BUF_SIZE 1024 83 84 85/* Product information read from the Edgeport */ 86struct product_info { 87 int TiMode; /* Current TI Mode */ 88 __u8 hardware_type; /* Type of hardware */ 89} __attribute__((packed)); 90 91/* circular buffer */ 92struct edge_buf { 93 unsigned int buf_size; 94 char *buf_buf; 95 char *buf_get; 96 char *buf_put; 97}; 98 99struct edgeport_port { 100 __u16 uart_base; 101 __u16 dma_address; 102 __u8 shadow_msr; 103 __u8 shadow_mcr; 104 __u8 shadow_lsr; 105 __u8 lsr_mask; 106 __u32 ump_read_timeout; /* Number of miliseconds the UMP will 107 wait without data before completing 108 a read short */ 109 int baud_rate; 110 int close_pending; 111 int lsr_event; 112 struct edgeport_uart_buf_desc tx; 113 struct async_icount icount; 114 wait_queue_head_t delta_msr_wait; /* for handling sleeping while 115 waiting for msr change to 116 happen */ 117 struct edgeport_serial *edge_serial; 118 struct usb_serial_port *port; 119 __u8 bUartMode; /* Port type, 0: RS232, etc. */ 120 spinlock_t ep_lock; 121 int ep_read_urb_state; 122 int ep_write_urb_in_use; 123 struct edge_buf *ep_out_buf; 124}; 125 126struct edgeport_serial { 127 struct product_info product_info; 128 u8 TI_I2C_Type; /* Type of I2C in UMP */ 129 u8 TiReadI2C; /* Set to TRUE if we have read the 130 I2c in Boot Mode */ 131 struct mutex es_lock; 132 int num_ports_open; 133 struct usb_serial *serial; 134}; 135 136 137/* Devices that this driver supports */ 138static struct usb_device_id edgeport_1port_id_table [] = { 139 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) }, 140 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) }, 141 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) }, 142 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) }, 143 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) }, 144 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) }, 145 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) }, 146 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) }, 147 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) }, 148 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) }, 149 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) }, 150 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) }, 151 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) }, 152 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) }, 153 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) }, 154 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) }, 155 { } 156}; 157 158static struct usb_device_id edgeport_2port_id_table [] = { 159 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) }, 160 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) }, 161 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) }, 162 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) }, 163 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) }, 164 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) }, 165 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) }, 166 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) }, 167 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) }, 168 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) }, 169 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) }, 170 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) }, 171 /* The 4, 8 and 16 port devices show up as multiple 2 port devices */ 172 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) }, 173 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) }, 174 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) }, 175 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) }, 176 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) }, 177 { } 178}; 179 180/* Devices that this driver supports */ 181static struct usb_device_id id_table_combined [] = { 182 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) }, 183 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) }, 184 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) }, 185 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) }, 186 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) }, 187 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) }, 188 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) }, 189 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) }, 190 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) }, 191 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) }, 192 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) }, 193 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) }, 194 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) }, 195 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) }, 196 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) }, 197 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) }, 198 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) }, 199 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) }, 200 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) }, 201 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) }, 202 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) }, 203 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) }, 204 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) }, 205 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) }, 206 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) }, 207 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) }, 208 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) }, 209 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) }, 210 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) }, 211 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) }, 212 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) }, 213 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) }, 214 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) }, 215 { } 216}; 217 218MODULE_DEVICE_TABLE(usb, id_table_combined); 219 220static struct usb_driver io_driver = { 221 .name = "io_ti", 222 .probe = usb_serial_probe, 223 .disconnect = usb_serial_disconnect, 224 .id_table = id_table_combined, 225 .no_dynamic_id = 1, 226}; 227 228 229static unsigned char OperationalMajorVersion; 230static unsigned char OperationalMinorVersion; 231static unsigned short OperationalBuildNumber; 232 233static int debug; 234 235static int low_latency = EDGE_LOW_LATENCY; 236static int closing_wait = EDGE_CLOSING_WAIT; 237static int ignore_cpu_rev; 238static int default_uart_mode; /* RS232 */ 239 240static void edge_tty_recv(struct device *dev, struct tty_struct *tty, 241 unsigned char *data, int length); 242 243static void stop_read(struct edgeport_port *edge_port); 244static int restart_read(struct edgeport_port *edge_port); 245 246static void edge_set_termios(struct usb_serial_port *port, 247 struct ktermios *old_termios); 248static void edge_send(struct usb_serial_port *port); 249 250/* sysfs attributes */ 251static int edge_create_sysfs_attrs(struct usb_serial_port *port); 252static int edge_remove_sysfs_attrs(struct usb_serial_port *port); 253 254/* circular buffer */ 255static struct edge_buf *edge_buf_alloc(unsigned int size); 256static void edge_buf_free(struct edge_buf *eb); 257static void edge_buf_clear(struct edge_buf *eb); 258static unsigned int edge_buf_data_avail(struct edge_buf *eb); 259static unsigned int edge_buf_space_avail(struct edge_buf *eb); 260static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf, 261 unsigned int count); 262static unsigned int edge_buf_get(struct edge_buf *eb, char *buf, 263 unsigned int count); 264 265 266static int ti_vread_sync(struct usb_device *dev, __u8 request, 267 __u16 value, __u16 index, u8 *data, int size) 268{ 269 int status; 270 271 status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request, 272 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN), 273 value, index, data, size, 1000); 274 if (status < 0) 275 return status; 276 if (status != size) { 277 dbg("%s - wanted to write %d, but only wrote %d", 278 __func__, size, status); 279 return -ECOMM; 280 } 281 return 0; 282} 283 284static int ti_vsend_sync(struct usb_device *dev, __u8 request, 285 __u16 value, __u16 index, u8 *data, int size) 286{ 287 int status; 288 289 status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request, 290 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT), 291 value, index, data, size, 1000); 292 if (status < 0) 293 return status; 294 if (status != size) { 295 dbg("%s - wanted to write %d, but only wrote %d", 296 __func__, size, status); 297 return -ECOMM; 298 } 299 return 0; 300} 301 302static int send_cmd(struct usb_device *dev, __u8 command, 303 __u8 moduleid, __u16 value, u8 *data, 304 int size) 305{ 306 return ti_vsend_sync(dev, command, value, moduleid, data, size); 307} 308 309/* clear tx/rx buffers and fifo in TI UMP */ 310static int purge_port(struct usb_serial_port *port, __u16 mask) 311{ 312 int port_number = port->number - port->serial->minor; 313 314 dbg("%s - port %d, mask %x", __func__, port_number, mask); 315 316 return send_cmd(port->serial->dev, 317 UMPC_PURGE_PORT, 318 (__u8)(UMPM_UART1_PORT + port_number), 319 mask, 320 NULL, 321 0); 322} 323 324/** 325 * read_download_mem - Read edgeport memory from TI chip 326 * @dev: usb device pointer 327 * @start_address: Device CPU address at which to read 328 * @length: Length of above data 329 * @address_type: Can read both XDATA and I2C 330 * @buffer: pointer to input data buffer 331 */ 332static int read_download_mem(struct usb_device *dev, int start_address, 333 int length, __u8 address_type, __u8 *buffer) 334{ 335 int status = 0; 336 __u8 read_length; 337 __be16 be_start_address; 338 339 dbg("%s - @ %x for %d", __func__, start_address, length); 340 341 /* Read in blocks of 64 bytes 342 * (TI firmware can't handle more than 64 byte reads) 343 */ 344 while (length) { 345 if (length > 64) 346 read_length = 64; 347 else 348 read_length = (__u8)length; 349 350 if (read_length > 1) { 351 dbg("%s - @ %x for %d", __func__, 352 start_address, read_length); 353 } 354 be_start_address = cpu_to_be16(start_address); 355 status = ti_vread_sync(dev, UMPC_MEMORY_READ, 356 (__u16)address_type, 357 (__force __u16)be_start_address, 358 buffer, read_length); 359 360 if (status) { 361 dbg("%s - ERROR %x", __func__, status); 362 return status; 363 } 364 365 if (read_length > 1) 366 usb_serial_debug_data(debug, &dev->dev, __func__, 367 read_length, buffer); 368 369 /* Update pointers/length */ 370 start_address += read_length; 371 buffer += read_length; 372 length -= read_length; 373 } 374 375 return status; 376} 377 378static int read_ram(struct usb_device *dev, int start_address, 379 int length, __u8 *buffer) 380{ 381 return read_download_mem(dev, start_address, length, 382 DTK_ADDR_SPACE_XDATA, buffer); 383} 384 385/* Read edgeport memory to a given block */ 386static int read_boot_mem(struct edgeport_serial *serial, 387 int start_address, int length, __u8 *buffer) 388{ 389 int status = 0; 390 int i; 391 392 for (i = 0; i < length; i++) { 393 status = ti_vread_sync(serial->serial->dev, 394 UMPC_MEMORY_READ, serial->TI_I2C_Type, 395 (__u16)(start_address+i), &buffer[i], 0x01); 396 if (status) { 397 dbg("%s - ERROR %x", __func__, status); 398 return status; 399 } 400 } 401 402 dbg("%s - start_address = %x, length = %d", 403 __func__, start_address, length); 404 usb_serial_debug_data(debug, &serial->serial->dev->dev, 405 __func__, length, buffer); 406 407 serial->TiReadI2C = 1; 408 409 return status; 410} 411 412/* Write given block to TI EPROM memory */ 413static int write_boot_mem(struct edgeport_serial *serial, 414 int start_address, int length, __u8 *buffer) 415{ 416 int status = 0; 417 int i; 418 __u8 temp; 419 420 /* Must do a read before write */ 421 if (!serial->TiReadI2C) { 422 status = read_boot_mem(serial, 0, 1, &temp); 423 if (status) 424 return status; 425 } 426 427 for (i = 0; i < length; ++i) { 428 status = ti_vsend_sync(serial->serial->dev, 429 UMPC_MEMORY_WRITE, buffer[i], 430 (__u16)(i + start_address), NULL, 0); 431 if (status) 432 return status; 433 } 434 435 dbg("%s - start_sddr = %x, length = %d", 436 __func__, start_address, length); 437 usb_serial_debug_data(debug, &serial->serial->dev->dev, 438 __func__, length, buffer); 439 440 return status; 441} 442 443 444/* Write edgeport I2C memory to TI chip */ 445static int write_i2c_mem(struct edgeport_serial *serial, 446 int start_address, int length, __u8 address_type, __u8 *buffer) 447{ 448 int status = 0; 449 int write_length; 450 __be16 be_start_address; 451 452 /* We can only send a maximum of 1 aligned byte page at a time */ 453 454 /* calulate the number of bytes left in the first page */ 455 write_length = EPROM_PAGE_SIZE - 456 (start_address & (EPROM_PAGE_SIZE - 1)); 457 458 if (write_length > length) 459 write_length = length; 460 461 dbg("%s - BytesInFirstPage Addr = %x, length = %d", 462 __func__, start_address, write_length); 463 usb_serial_debug_data(debug, &serial->serial->dev->dev, 464 __func__, write_length, buffer); 465 466 /* Write first page */ 467 be_start_address = cpu_to_be16(start_address); 468 status = ti_vsend_sync(serial->serial->dev, 469 UMPC_MEMORY_WRITE, (__u16)address_type, 470 (__force __u16)be_start_address, 471 buffer, write_length); 472 if (status) { 473 dbg("%s - ERROR %d", __func__, status); 474 return status; 475 } 476 477 length -= write_length; 478 start_address += write_length; 479 buffer += write_length; 480 481 /* We should be aligned now -- can write 482 max page size bytes at a time */ 483 while (length) { 484 if (length > EPROM_PAGE_SIZE) 485 write_length = EPROM_PAGE_SIZE; 486 else 487 write_length = length; 488 489 dbg("%s - Page Write Addr = %x, length = %d", 490 __func__, start_address, write_length); 491 usb_serial_debug_data(debug, &serial->serial->dev->dev, 492 __func__, write_length, buffer); 493 494 /* Write next page */ 495 be_start_address = cpu_to_be16(start_address); 496 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE, 497 (__u16)address_type, 498 (__force __u16)be_start_address, 499 buffer, write_length); 500 if (status) { 501 dev_err(&serial->serial->dev->dev, "%s - ERROR %d\n", 502 __func__, status); 503 return status; 504 } 505 506 length -= write_length; 507 start_address += write_length; 508 buffer += write_length; 509 } 510 return status; 511} 512 513/* Examine the UMP DMA registers and LSR 514 * 515 * Check the MSBit of the X and Y DMA byte count registers. 516 * A zero in this bit indicates that the TX DMA buffers are empty 517 * then check the TX Empty bit in the UART. 518 */ 519static int tx_active(struct edgeport_port *port) 520{ 521 int status; 522 struct out_endpoint_desc_block *oedb; 523 __u8 *lsr; 524 int bytes_left = 0; 525 526 oedb = kmalloc(sizeof(*oedb), GFP_KERNEL); 527 if (!oedb) { 528 dev_err(&port->port->dev, "%s - out of memory\n", __func__); 529 return -ENOMEM; 530 } 531 532 lsr = kmalloc(1, GFP_KERNEL); /* Sigh, that's right, just one byte, 533 as not all platforms can do DMA 534 from stack */ 535 if (!lsr) { 536 kfree(oedb); 537 return -ENOMEM; 538 } 539 /* Read the DMA Count Registers */ 540 status = read_ram(port->port->serial->dev, port->dma_address, 541 sizeof(*oedb), (void *)oedb); 542 if (status) 543 goto exit_is_tx_active; 544 545 dbg("%s - XByteCount 0x%X", __func__, oedb->XByteCount); 546 547 /* and the LSR */ 548 status = read_ram(port->port->serial->dev, 549 port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr); 550 551 if (status) 552 goto exit_is_tx_active; 553 dbg("%s - LSR = 0x%X", __func__, *lsr); 554 555 /* If either buffer has data or we are transmitting then return TRUE */ 556 if ((oedb->XByteCount & 0x80) != 0) 557 bytes_left += 64; 558 559 if ((*lsr & UMP_UART_LSR_TX_MASK) == 0) 560 bytes_left += 1; 561 562 /* We return Not Active if we get any kind of error */ 563exit_is_tx_active: 564 dbg("%s - return %d", __func__, bytes_left); 565 566 kfree(lsr); 567 kfree(oedb); 568 return bytes_left; 569} 570 571static void chase_port(struct edgeport_port *port, unsigned long timeout, 572 int flush) 573{ 574 int baud_rate; 575 struct tty_struct *tty = port->port->tty; 576 wait_queue_t wait; 577 unsigned long flags; 578 579 if (!timeout) 580 timeout = (HZ * EDGE_CLOSING_WAIT)/100; 581 582 /* wait for data to drain from the buffer */ 583 spin_lock_irqsave(&port->ep_lock, flags); 584 init_waitqueue_entry(&wait, current); 585 add_wait_queue(&tty->write_wait, &wait); 586 for (;;) { 587 set_current_state(TASK_INTERRUPTIBLE); 588 if (edge_buf_data_avail(port->ep_out_buf) == 0 589 || timeout == 0 || signal_pending(current) 590 || !usb_get_intfdata(port->port->serial->interface)) 591 /* disconnect */ 592 break; 593 spin_unlock_irqrestore(&port->ep_lock, flags); 594 timeout = schedule_timeout(timeout); 595 spin_lock_irqsave(&port->ep_lock, flags); 596 } 597 set_current_state(TASK_RUNNING); 598 remove_wait_queue(&tty->write_wait, &wait); 599 if (flush) 600 edge_buf_clear(port->ep_out_buf); 601 spin_unlock_irqrestore(&port->ep_lock, flags); 602 603 /* wait for data to drain from the device */ 604 timeout += jiffies; 605 while ((long)(jiffies - timeout) < 0 && !signal_pending(current) 606 && usb_get_intfdata(port->port->serial->interface)) { 607 /* not disconnected */ 608 if (!tx_active(port)) 609 break; 610 msleep(10); 611 } 612 613 /* disconnected */ 614 if (!usb_get_intfdata(port->port->serial->interface)) 615 return; 616 617 /* wait one more character time, based on baud rate */ 618 /* (tx_active doesn't seem to wait for the last byte) */ 619 baud_rate = port->baud_rate; 620 if (baud_rate == 0) 621 baud_rate = 50; 622 msleep(max(1, DIV_ROUND_UP(10000, baud_rate))); 623} 624 625static int choose_config(struct usb_device *dev) 626{ 627 /* 628 * There may be multiple configurations on this device, in which case 629 * we would need to read and parse all of them to find out which one 630 * we want. However, we just support one config at this point, 631 * configuration # 1, which is Config Descriptor 0. 632 */ 633 634 dbg("%s - Number of Interfaces = %d", 635 __func__, dev->config->desc.bNumInterfaces); 636 dbg("%s - MAX Power = %d", 637 __func__, dev->config->desc.bMaxPower * 2); 638 639 if (dev->config->desc.bNumInterfaces != 1) { 640 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", 641 __func__); 642 return -ENODEV; 643 } 644 645 return 0; 646} 647 648static int read_rom(struct edgeport_serial *serial, 649 int start_address, int length, __u8 *buffer) 650{ 651 int status; 652 653 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) { 654 status = read_download_mem(serial->serial->dev, 655 start_address, 656 length, 657 serial->TI_I2C_Type, 658 buffer); 659 } else { 660 status = read_boot_mem(serial, start_address, length, 661 buffer); 662 } 663 return status; 664} 665 666static int write_rom(struct edgeport_serial *serial, int start_address, 667 int length, __u8 *buffer) 668{ 669 if (serial->product_info.TiMode == TI_MODE_BOOT) 670 return write_boot_mem(serial, start_address, length, 671 buffer); 672 673 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) 674 return write_i2c_mem(serial, start_address, length, 675 serial->TI_I2C_Type, buffer); 676 return -EINVAL; 677} 678 679 680 681/* Read a descriptor header from I2C based on type */ 682static int get_descriptor_addr(struct edgeport_serial *serial, 683 int desc_type, struct ti_i2c_desc *rom_desc) 684{ 685 int start_address; 686 int status; 687 688 /* Search for requested descriptor in I2C */ 689 start_address = 2; 690 do { 691 status = read_rom(serial, 692 start_address, 693 sizeof(struct ti_i2c_desc), 694 (__u8 *)rom_desc); 695 if (status) 696 return 0; 697 698 if (rom_desc->Type == desc_type) 699 return start_address; 700 701 start_address = start_address + sizeof(struct ti_i2c_desc) 702 + rom_desc->Size; 703 704 } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type); 705 706 return 0; 707} 708 709/* Validate descriptor checksum */ 710static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer) 711{ 712 __u16 i; 713 __u8 cs = 0; 714 715 for (i = 0; i < rom_desc->Size; i++) 716 cs = (__u8)(cs + buffer[i]); 717 718 if (cs != rom_desc->CheckSum) { 719 dbg("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs); 720 return -EINVAL; 721 } 722 return 0; 723} 724 725/* Make sure that the I2C image is good */ 726static int check_i2c_image(struct edgeport_serial *serial) 727{ 728 struct device *dev = &serial->serial->dev->dev; 729 int status = 0; 730 struct ti_i2c_desc *rom_desc; 731 int start_address = 2; 732 __u8 *buffer; 733 __u16 ttype; 734 735 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 736 if (!rom_desc) { 737 dev_err(dev, "%s - out of memory\n", __func__); 738 return -ENOMEM; 739 } 740 buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL); 741 if (!buffer) { 742 dev_err(dev, "%s - out of memory when allocating buffer\n", 743 __func__); 744 kfree(rom_desc); 745 return -ENOMEM; 746 } 747 748 /* Read the first byte (Signature0) must be 0x52 or 0x10 */ 749 status = read_rom(serial, 0, 1, buffer); 750 if (status) 751 goto out; 752 753 if (*buffer != UMP5152 && *buffer != UMP3410) { 754 dev_err(dev, "%s - invalid buffer signature\n", __func__); 755 status = -ENODEV; 756 goto out; 757 } 758 759 do { 760 /* Validate the I2C */ 761 status = read_rom(serial, 762 start_address, 763 sizeof(struct ti_i2c_desc), 764 (__u8 *)rom_desc); 765 if (status) 766 break; 767 768 if ((start_address + sizeof(struct ti_i2c_desc) + 769 rom_desc->Size) > TI_MAX_I2C_SIZE) { 770 status = -ENODEV; 771 dbg("%s - structure too big, erroring out.", __func__); 772 break; 773 } 774 775 dbg("%s Type = 0x%x", __func__, rom_desc->Type); 776 777 /* Skip type 2 record */ 778 ttype = rom_desc->Type & 0x0f; 779 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC 780 && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) { 781 /* Read the descriptor data */ 782 status = read_rom(serial, start_address + 783 sizeof(struct ti_i2c_desc), 784 rom_desc->Size, buffer); 785 if (status) 786 break; 787 788 status = valid_csum(rom_desc, buffer); 789 if (status) 790 break; 791 } 792 start_address = start_address + sizeof(struct ti_i2c_desc) + 793 rom_desc->Size; 794 795 } while ((rom_desc->Type != I2C_DESC_TYPE_ION) && 796 (start_address < TI_MAX_I2C_SIZE)); 797 798 if ((rom_desc->Type != I2C_DESC_TYPE_ION) || 799 (start_address > TI_MAX_I2C_SIZE)) 800 status = -ENODEV; 801 802out: 803 kfree(buffer); 804 kfree(rom_desc); 805 return status; 806} 807 808static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer) 809{ 810 int status; 811 int start_address; 812 struct ti_i2c_desc *rom_desc; 813 struct edge_ti_manuf_descriptor *desc; 814 815 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 816 if (!rom_desc) { 817 dev_err(&serial->serial->dev->dev, "%s - out of memory\n", 818 __func__); 819 return -ENOMEM; 820 } 821 start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION, 822 rom_desc); 823 824 if (!start_address) { 825 dbg("%s - Edge Descriptor not found in I2C", __func__); 826 status = -ENODEV; 827 goto exit; 828 } 829 830 /* Read the descriptor data */ 831 status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc), 832 rom_desc->Size, buffer); 833 if (status) 834 goto exit; 835 836 status = valid_csum(rom_desc, buffer); 837 838 desc = (struct edge_ti_manuf_descriptor *)buffer; 839 dbg("%s - IonConfig 0x%x", __func__, desc->IonConfig); 840 dbg("%s - Version %d", __func__, desc->Version); 841 dbg("%s - Cpu/Board 0x%x", __func__, desc->CpuRev_BoardRev); 842 dbg("%s - NumPorts %d", __func__, desc->NumPorts); 843 dbg("%s - NumVirtualPorts %d", __func__, desc->NumVirtualPorts); 844 dbg("%s - TotalPorts %d", __func__, desc->TotalPorts); 845 846exit: 847 kfree(rom_desc); 848 return status; 849} 850 851/* Build firmware header used for firmware update */ 852static int build_i2c_fw_hdr(__u8 *header, struct device *dev) 853{ 854 __u8 *buffer; 855 int buffer_size; 856 int i; 857 int err; 858 __u8 cs = 0; 859 struct ti_i2c_desc *i2c_header; 860 struct ti_i2c_image_header *img_header; 861 struct ti_i2c_firmware_rec *firmware_rec; 862 const struct firmware *fw; 863 const char *fw_name = "edgeport/down3.bin"; 864 865 /* In order to update the I2C firmware we must change the type 2 record 866 * to type 0xF2. This will force the UMP to come up in Boot Mode. 867 * Then while in boot mode, the driver will download the latest 868 * firmware (padded to 15.5k) into the UMP ram. And finally when the 869 * device comes back up in download mode the driver will cause the new 870 * firmware to be copied from the UMP Ram to I2C and the firmware will 871 * update the record type from 0xf2 to 0x02. 872 */ 873 874 /* Allocate a 15.5k buffer + 2 bytes for version number 875 * (Firmware Record) */ 876 buffer_size = (((1024 * 16) - 512 ) + 877 sizeof(struct ti_i2c_firmware_rec)); 878 879 buffer = kmalloc(buffer_size, GFP_KERNEL); 880 if (!buffer) { 881 dev_err(dev, "%s - out of memory\n", __func__); 882 return -ENOMEM; 883 } 884 885 // Set entire image of 0xffs 886 memset(buffer, 0xff, buffer_size); 887 888 err = request_firmware(&fw, fw_name, dev); 889 if (err) { 890 printk(KERN_ERR "Failed to load image \"%s\" err %d\n", 891 fw_name, err); 892 kfree(buffer); 893 return err; 894 } 895 896 /* Save Download Version Number */ 897 OperationalMajorVersion = fw->data[0]; 898 OperationalMinorVersion = fw->data[1]; 899 OperationalBuildNumber = fw->data[2] | (fw->data[3] << 8); 900 901 /* Copy version number into firmware record */ 902 firmware_rec = (struct ti_i2c_firmware_rec *)buffer; 903 904 firmware_rec->Ver_Major = OperationalMajorVersion; 905 firmware_rec->Ver_Minor = OperationalMinorVersion; 906 907 /* Pointer to fw_down memory image */ 908 img_header = (struct ti_i2c_image_header *)&fw->data[4]; 909 910 memcpy(buffer + sizeof(struct ti_i2c_firmware_rec), 911 &fw->data[4 + sizeof(struct ti_i2c_image_header)], 912 le16_to_cpu(img_header->Length)); 913 914 release_firmware(fw); 915 916 for (i=0; i < buffer_size; i++) { 917 cs = (__u8)(cs + buffer[i]); 918 } 919 920 kfree(buffer); 921 922 /* Build new header */ 923 i2c_header = (struct ti_i2c_desc *)header; 924 firmware_rec = (struct ti_i2c_firmware_rec*)i2c_header->Data; 925 926 i2c_header->Type = I2C_DESC_TYPE_FIRMWARE_BLANK; 927 i2c_header->Size = (__u16)buffer_size; 928 i2c_header->CheckSum = cs; 929 firmware_rec->Ver_Major = OperationalMajorVersion; 930 firmware_rec->Ver_Minor = OperationalMinorVersion; 931 932 return 0; 933} 934 935/* Try to figure out what type of I2c we have */ 936static int i2c_type_bootmode(struct edgeport_serial *serial) 937{ 938 int status; 939 __u8 data; 940 941 /* Try to read type 2 */ 942 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ, 943 DTK_ADDR_SPACE_I2C_TYPE_II, 0, &data, 0x01); 944 if (status) 945 dbg("%s - read 2 status error = %d", __func__, status); 946 else 947 dbg("%s - read 2 data = 0x%x", __func__, data); 948 if ((!status) && (data == UMP5152 || data == UMP3410)) { 949 dbg("%s - ROM_TYPE_II", __func__); 950 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 951 return 0; 952 } 953 954 /* Try to read type 3 */ 955 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ, 956 DTK_ADDR_SPACE_I2C_TYPE_III, 0, &data, 0x01); 957 if (status) 958 dbg("%s - read 3 status error = %d", __func__, status); 959 else 960 dbg("%s - read 2 data = 0x%x", __func__, data); 961 if ((!status) && (data == UMP5152 || data == UMP3410)) { 962 dbg("%s - ROM_TYPE_III", __func__); 963 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III; 964 return 0; 965 } 966 967 dbg("%s - Unknown", __func__); 968 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 969 return -ENODEV; 970} 971 972static int bulk_xfer(struct usb_serial *serial, void *buffer, 973 int length, int *num_sent) 974{ 975 int status; 976 977 status = usb_bulk_msg(serial->dev, 978 usb_sndbulkpipe(serial->dev, 979 serial->port[0]->bulk_out_endpointAddress), 980 buffer, length, num_sent, 1000); 981 return status; 982} 983 984/* Download given firmware image to the device (IN BOOT MODE) */ 985static int download_code(struct edgeport_serial *serial, __u8 *image, 986 int image_length) 987{ 988 int status = 0; 989 int pos; 990 int transfer; 991 int done; 992 993 /* Transfer firmware image */ 994 for (pos = 0; pos < image_length; ) { 995 /* Read the next buffer from file */ 996 transfer = image_length - pos; 997 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE) 998 transfer = EDGE_FW_BULK_MAX_PACKET_SIZE; 999 1000 /* Transfer data */ 1001 status = bulk_xfer(serial->serial, &image[pos], 1002 transfer, &done); 1003 if (status) 1004 break; 1005 /* Advance buffer pointer */ 1006 pos += done; 1007 } 1008 1009 return status; 1010} 1011 1012/* FIXME!!! */ 1013static int config_boot_dev(struct usb_device *dev) 1014{ 1015 return 0; 1016} 1017 1018static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc) 1019{ 1020 return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev); 1021} 1022 1023/** 1024 * DownloadTIFirmware - Download run-time operating firmware to the TI5052 1025 * 1026 * This routine downloads the main operating code into the TI5052, using the 1027 * boot code already burned into E2PROM or ROM. 1028 */ 1029static int download_fw(struct edgeport_serial *serial) 1030{ 1031 struct device *dev = &serial->serial->dev->dev; 1032 int status = 0; 1033 int start_address; 1034 struct edge_ti_manuf_descriptor *ti_manuf_desc; 1035 struct usb_interface_descriptor *interface; 1036 int download_cur_ver; 1037 int download_new_ver; 1038 1039 /* This routine is entered by both the BOOT mode and the Download mode 1040 * We can determine which code is running by the reading the config 1041 * descriptor and if we have only one bulk pipe it is in boot mode 1042 */ 1043 serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP; 1044 1045 /* Default to type 2 i2c */ 1046 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 1047 1048 status = choose_config(serial->serial->dev); 1049 if (status) 1050 return status; 1051 1052 interface = &serial->serial->interface->cur_altsetting->desc; 1053 if (!interface) { 1054 dev_err(dev, "%s - no interface set, error!\n", __func__); 1055 return -ENODEV; 1056 } 1057 1058 /* 1059 * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING 1060 * if we have more than one endpoint we are definitely in download 1061 * mode 1062 */ 1063 if (interface->bNumEndpoints > 1) 1064 serial->product_info.TiMode = TI_MODE_DOWNLOAD; 1065 else 1066 /* Otherwise we will remain in configuring mode */ 1067 serial->product_info.TiMode = TI_MODE_CONFIGURING; 1068 1069 /********************************************************************/ 1070 /* Download Mode */ 1071 /********************************************************************/ 1072 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) { 1073 struct ti_i2c_desc *rom_desc; 1074 1075 dbg("%s - RUNNING IN DOWNLOAD MODE", __func__); 1076 1077 status = check_i2c_image(serial); 1078 if (status) { 1079 dbg("%s - DOWNLOAD MODE -- BAD I2C", __func__); 1080 return status; 1081 } 1082 1083 /* Validate Hardware version number 1084 * Read Manufacturing Descriptor from TI Based Edgeport 1085 */ 1086 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL); 1087 if (!ti_manuf_desc) { 1088 dev_err(dev, "%s - out of memory.\n", __func__); 1089 return -ENOMEM; 1090 } 1091 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc); 1092 if (status) { 1093 kfree(ti_manuf_desc); 1094 return status; 1095 } 1096 1097 /* Check version number of ION descriptor */ 1098 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) { 1099 dbg("%s - Wrong CPU Rev %d (Must be 2)", 1100 __func__, ti_cpu_rev(ti_manuf_desc)); 1101 kfree(ti_manuf_desc); 1102 return -EINVAL; 1103 } 1104 1105 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 1106 if (!rom_desc) { 1107 dev_err(dev, "%s - out of memory.\n", __func__); 1108 kfree(ti_manuf_desc); 1109 return -ENOMEM; 1110 } 1111 1112 /* Search for type 2 record (firmware record) */ 1113 start_address = get_descriptor_addr(serial, 1114 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc); 1115 if (start_address != 0) { 1116 struct ti_i2c_firmware_rec *firmware_version; 1117 __u8 record; 1118 1119 dbg("%s - Found Type FIRMWARE (Type 2) record", 1120 __func__); 1121 1122 firmware_version = kmalloc(sizeof(*firmware_version), 1123 GFP_KERNEL); 1124 if (!firmware_version) { 1125 dev_err(dev, "%s - out of memory.\n", __func__); 1126 kfree(rom_desc); 1127 kfree(ti_manuf_desc); 1128 return -ENOMEM; 1129 } 1130 1131 /* Validate version number 1132 * Read the descriptor data 1133 */ 1134 status = read_rom(serial, start_address + 1135 sizeof(struct ti_i2c_desc), 1136 sizeof(struct ti_i2c_firmware_rec), 1137 (__u8 *)firmware_version); 1138 if (status) { 1139 kfree(firmware_version); 1140 kfree(rom_desc); 1141 kfree(ti_manuf_desc); 1142 return status; 1143 } 1144 1145 /* Check version number of download with current 1146 version in I2c */ 1147 download_cur_ver = (firmware_version->Ver_Major << 8) + 1148 (firmware_version->Ver_Minor); 1149 download_new_ver = (OperationalMajorVersion << 8) + 1150 (OperationalMinorVersion); 1151 1152 dbg("%s - >> FW Versions Device %d.%d Driver %d.%d", 1153 __func__, 1154 firmware_version->Ver_Major, 1155 firmware_version->Ver_Minor, 1156 OperationalMajorVersion, 1157 OperationalMinorVersion); 1158 1159 /* Check if we have an old version in the I2C and 1160 update if necessary */ 1161 if (download_cur_ver != download_new_ver) { 1162 dbg("%s - Update I2C dld from %d.%d to %d.%d", 1163 __func__, 1164 firmware_version->Ver_Major, 1165 firmware_version->Ver_Minor, 1166 OperationalMajorVersion, 1167 OperationalMinorVersion); 1168 1169 /* In order to update the I2C firmware we must 1170 * change the type 2 record to type 0xF2. This 1171 * will force the UMP to come up in Boot Mode. 1172 * Then while in boot mode, the driver will 1173 * download the latest firmware (padded to 1174 * 15.5k) into the UMP ram. Finally when the 1175 * device comes back up in download mode the 1176 * driver will cause the new firmware to be 1177 * copied from the UMP Ram to I2C and the 1178 * firmware will update the record type from 1179 * 0xf2 to 0x02. 1180 */ 1181 record = I2C_DESC_TYPE_FIRMWARE_BLANK; 1182 1183 /* Change the I2C Firmware record type to 1184 0xf2 to trigger an update */ 1185 status = write_rom(serial, start_address, 1186 sizeof(record), &record); 1187 if (status) { 1188 kfree(firmware_version); 1189 kfree(rom_desc); 1190 kfree(ti_manuf_desc); 1191 return status; 1192 } 1193 1194 /* verify the write -- must do this in order 1195 * for write to complete before we do the 1196 * hardware reset 1197 */ 1198 status = read_rom(serial, 1199 start_address, 1200 sizeof(record), 1201 &record); 1202 if (status) { 1203 kfree(firmware_version); 1204 kfree(rom_desc); 1205 kfree(ti_manuf_desc); 1206 return status; 1207 } 1208 1209 if (record != I2C_DESC_TYPE_FIRMWARE_BLANK) { 1210 dev_err(dev, 1211 "%s - error resetting device\n", 1212 __func__); 1213 kfree(firmware_version); 1214 kfree(rom_desc); 1215 kfree(ti_manuf_desc); 1216 return -ENODEV; 1217 } 1218 1219 dbg("%s - HARDWARE RESET", __func__); 1220 1221 /* Reset UMP -- Back to BOOT MODE */ 1222 status = ti_vsend_sync(serial->serial->dev, 1223 UMPC_HARDWARE_RESET, 1224 0, 0, NULL, 0); 1225 1226 dbg("%s - HARDWARE RESET return %d", 1227 __func__, status); 1228 1229 /* return an error on purpose. */ 1230 kfree(firmware_version); 1231 kfree(rom_desc); 1232 kfree(ti_manuf_desc); 1233 return -ENODEV; 1234 } 1235 kfree(firmware_version); 1236 } 1237 /* Search for type 0xF2 record (firmware blank record) */ 1238 else if ((start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) { 1239#define HEADER_SIZE (sizeof(struct ti_i2c_desc) + \ 1240 sizeof(struct ti_i2c_firmware_rec)) 1241 __u8 *header; 1242 __u8 *vheader; 1243 1244 header = kmalloc(HEADER_SIZE, GFP_KERNEL); 1245 if (!header) { 1246 dev_err(dev, "%s - out of memory.\n", __func__); 1247 kfree(rom_desc); 1248 kfree(ti_manuf_desc); 1249 return -ENOMEM; 1250 } 1251 1252 vheader = kmalloc(HEADER_SIZE, GFP_KERNEL); 1253 if (!vheader) { 1254 dev_err(dev, "%s - out of memory.\n", __func__); 1255 kfree(header); 1256 kfree(rom_desc); 1257 kfree(ti_manuf_desc); 1258 return -ENOMEM; 1259 } 1260 1261 dbg("%s - Found Type BLANK FIRMWARE (Type F2) record", 1262 __func__); 1263 1264 /* 1265 * In order to update the I2C firmware we must change 1266 * the type 2 record to type 0xF2. This will force the 1267 * UMP to come up in Boot Mode. Then while in boot 1268 * mode, the driver will download the latest firmware 1269 * (padded to 15.5k) into the UMP ram. Finally when the 1270 * device comes back up in download mode the driver 1271 * will cause the new firmware to be copied from the 1272 * UMP Ram to I2C and the firmware will update the 1273 * record type from 0xf2 to 0x02. 1274 */ 1275 status = build_i2c_fw_hdr(header, dev); 1276 if (status) { 1277 kfree(vheader); 1278 kfree(header); 1279 kfree(rom_desc); 1280 kfree(ti_manuf_desc); 1281 return status; 1282 } 1283 1284 /* Update I2C with type 0xf2 record with correct 1285 size and checksum */ 1286 status = write_rom(serial, 1287 start_address, 1288 HEADER_SIZE, 1289 header); 1290 if (status) { 1291 kfree(vheader); 1292 kfree(header); 1293 kfree(rom_desc); 1294 kfree(ti_manuf_desc); 1295 return status; 1296 } 1297 1298 /* verify the write -- must do this in order for 1299 write to complete before we do the hardware reset */ 1300 status = read_rom(serial, start_address, 1301 HEADER_SIZE, vheader); 1302 1303 if (status) { 1304 dbg("%s - can't read header back", __func__); 1305 kfree(vheader); 1306 kfree(header); 1307 kfree(rom_desc); 1308 kfree(ti_manuf_desc); 1309 return status; 1310 } 1311 if (memcmp(vheader, header, HEADER_SIZE)) { 1312 dbg("%s - write download record failed", 1313 __func__); 1314 kfree(vheader); 1315 kfree(header); 1316 kfree(rom_desc); 1317 kfree(ti_manuf_desc); 1318 return status; 1319 } 1320 1321 kfree(vheader); 1322 kfree(header); 1323 1324 dbg("%s - Start firmware update", __func__); 1325 1326 /* Tell firmware to copy download image into I2C */ 1327 status = ti_vsend_sync(serial->serial->dev, 1328 UMPC_COPY_DNLD_TO_I2C, 0, 0, NULL, 0); 1329 1330 dbg("%s - Update complete 0x%x", __func__, status); 1331 if (status) { 1332 dev_err(dev, 1333 "%s - UMPC_COPY_DNLD_TO_I2C failed\n", 1334 __func__); 1335 kfree(rom_desc); 1336 kfree(ti_manuf_desc); 1337 return status; 1338 } 1339 } 1340 1341 // The device is running the download code 1342 kfree(rom_desc); 1343 kfree(ti_manuf_desc); 1344 return 0; 1345 } 1346 1347 /********************************************************************/ 1348 /* Boot Mode */ 1349 /********************************************************************/ 1350 dbg("%s - RUNNING IN BOOT MODE", __func__); 1351 1352 /* Configure the TI device so we can use the BULK pipes for download */ 1353 status = config_boot_dev(serial->serial->dev); 1354 if (status) 1355 return status; 1356 1357 if (le16_to_cpu(serial->serial->dev->descriptor.idVendor) 1358 != USB_VENDOR_ID_ION) { 1359 dbg("%s - VID = 0x%x", __func__, 1360 le16_to_cpu(serial->serial->dev->descriptor.idVendor)); 1361 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 1362 goto stayinbootmode; 1363 } 1364 1365 /* We have an ION device (I2c Must be programmed) 1366 Determine I2C image type */ 1367 if (i2c_type_bootmode(serial)) 1368 goto stayinbootmode; 1369 1370 /* Check for ION Vendor ID and that the I2C is valid */ 1371 if (!check_i2c_image(serial)) { 1372 struct ti_i2c_image_header *header; 1373 int i; 1374 __u8 cs = 0; 1375 __u8 *buffer; 1376 int buffer_size; 1377 int err; 1378 const struct firmware *fw; 1379 const char *fw_name = "edgeport/down3.bin"; 1380 1381 /* Validate Hardware version number 1382 * Read Manufacturing Descriptor from TI Based Edgeport 1383 */ 1384 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL); 1385 if (!ti_manuf_desc) { 1386 dev_err(dev, "%s - out of memory.\n", __func__); 1387 return -ENOMEM; 1388 } 1389 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc); 1390 if (status) { 1391 kfree(ti_manuf_desc); 1392 goto stayinbootmode; 1393 } 1394 1395 /* Check for version 2 */ 1396 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) { 1397 dbg("%s - Wrong CPU Rev %d (Must be 2)", 1398 __func__, ti_cpu_rev(ti_manuf_desc)); 1399 kfree(ti_manuf_desc); 1400 goto stayinbootmode; 1401 } 1402 1403 kfree(ti_manuf_desc); 1404 1405 /* 1406 * In order to update the I2C firmware we must change the type 1407 * 2 record to type 0xF2. This will force the UMP to come up 1408 * in Boot Mode. Then while in boot mode, the driver will 1409 * download the latest firmware (padded to 15.5k) into the 1410 * UMP ram. Finally when the device comes back up in download 1411 * mode the driver will cause the new firmware to be copied 1412 * from the UMP Ram to I2C and the firmware will update the 1413 * record type from 0xf2 to 0x02. 1414 * 1415 * Do we really have to copy the whole firmware image, 1416 * or could we do this in place! 1417 */ 1418 1419 /* Allocate a 15.5k buffer + 3 byte header */ 1420 buffer_size = (((1024 * 16) - 512) + 1421 sizeof(struct ti_i2c_image_header)); 1422 buffer = kmalloc(buffer_size, GFP_KERNEL); 1423 if (!buffer) { 1424 dev_err(dev, "%s - out of memory\n", __func__); 1425 return -ENOMEM; 1426 } 1427 1428 /* Initialize the buffer to 0xff (pad the buffer) */ 1429 memset(buffer, 0xff, buffer_size); 1430 1431 err = request_firmware(&fw, fw_name, dev); 1432 if (err) { 1433 printk(KERN_ERR "Failed to load image \"%s\" err %d\n", 1434 fw_name, err); 1435 kfree(buffer); 1436 return err; 1437 } 1438 memcpy(buffer, &fw->data[4], fw->size - 4); 1439 release_firmware(fw); 1440 1441 for (i = sizeof(struct ti_i2c_image_header); 1442 i < buffer_size; i++) { 1443 cs = (__u8)(cs + buffer[i]); 1444 } 1445 1446 header = (struct ti_i2c_image_header *)buffer; 1447 1448 /* update length and checksum after padding */ 1449 header->Length = cpu_to_le16((__u16)(buffer_size - 1450 sizeof(struct ti_i2c_image_header))); 1451 header->CheckSum = cs; 1452 1453 /* Download the operational code */ 1454 dbg("%s - Downloading operational code image (TI UMP)", 1455 __func__); 1456 status = download_code(serial, buffer, buffer_size); 1457 1458 kfree(buffer); 1459 1460 if (status) { 1461 dbg("%s - Error downloading operational code image", 1462 __func__); 1463 return status; 1464 } 1465 1466 /* Device will reboot */ 1467 serial->product_info.TiMode = TI_MODE_TRANSITIONING; 1468 1469 dbg("%s - Download successful -- Device rebooting...", 1470 __func__); 1471 1472 /* return an error on purpose */ 1473 return -ENODEV; 1474 } 1475 1476stayinbootmode: 1477 /* Eprom is invalid or blank stay in boot mode */ 1478 dbg("%s - STAYING IN BOOT MODE", __func__); 1479 serial->product_info.TiMode = TI_MODE_BOOT; 1480 1481 return 0; 1482} 1483 1484 1485static int ti_do_config(struct edgeport_port *port, int feature, int on) 1486{ 1487 int port_number = port->port->number - port->port->serial->minor; 1488 on = !!on; /* 1 or 0 not bitmask */ 1489 return send_cmd(port->port->serial->dev, 1490 feature, (__u8)(UMPM_UART1_PORT + port_number), 1491 on, NULL, 0); 1492} 1493 1494 1495static int restore_mcr(struct edgeport_port *port, __u8 mcr) 1496{ 1497 int status = 0; 1498 1499 dbg("%s - %x", __func__, mcr); 1500 1501 status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR); 1502 if (status) 1503 return status; 1504 status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS); 1505 if (status) 1506 return status; 1507 return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK); 1508} 1509 1510/* Convert TI LSR to standard UART flags */ 1511static __u8 map_line_status(__u8 ti_lsr) 1512{ 1513 __u8 lsr = 0; 1514 1515#define MAP_FLAG(flagUmp, flagUart) \ 1516 if (ti_lsr & flagUmp) \ 1517 lsr |= flagUart; 1518 1519 MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR) /* overrun */ 1520 MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR) /* parity error */ 1521 MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR) /* framing error */ 1522 MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK) /* break detected */ 1523 MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL) /* rx data available */ 1524 MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY) /* tx hold reg empty */ 1525 1526#undef MAP_FLAG 1527 1528 return lsr; 1529} 1530 1531static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr) 1532{ 1533 struct async_icount *icount; 1534 struct tty_struct *tty; 1535 1536 dbg("%s - %02x", __func__, msr); 1537 1538 if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | 1539 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 1540 icount = &edge_port->icount; 1541 1542 /* update input line counters */ 1543 if (msr & EDGEPORT_MSR_DELTA_CTS) 1544 icount->cts++; 1545 if (msr & EDGEPORT_MSR_DELTA_DSR) 1546 icount->dsr++; 1547 if (msr & EDGEPORT_MSR_DELTA_CD) 1548 icount->dcd++; 1549 if (msr & EDGEPORT_MSR_DELTA_RI) 1550 icount->rng++; 1551 wake_up_interruptible(&edge_port->delta_msr_wait); 1552 } 1553 1554 /* Save the new modem status */ 1555 edge_port->shadow_msr = msr & 0xf0; 1556 1557 tty = edge_port->port->tty; 1558 /* handle CTS flow control */ 1559 if (tty && C_CRTSCTS(tty)) { 1560 if (msr & EDGEPORT_MSR_CTS) { 1561 tty->hw_stopped = 0; 1562 tty_wakeup(tty); 1563 } else { 1564 tty->hw_stopped = 1; 1565 } 1566 } 1567 1568 return; 1569} 1570 1571static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data, 1572 __u8 lsr, __u8 data) 1573{ 1574 struct async_icount *icount; 1575 __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | 1576 LSR_FRM_ERR | LSR_BREAK)); 1577 1578 dbg("%s - %02x", __func__, new_lsr); 1579 1580 edge_port->shadow_lsr = lsr; 1581 1582 if (new_lsr & LSR_BREAK) 1583 /* 1584 * Parity and Framing errors only count if they 1585 * occur exclusive of a break being received. 1586 */ 1587 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 1588 1589 /* Place LSR data byte into Rx buffer */ 1590 if (lsr_data && edge_port->port->tty) 1591 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, 1592 &data, 1); 1593 1594 /* update input line counters */ 1595 icount = &edge_port->icount; 1596 if (new_lsr & LSR_BREAK) 1597 icount->brk++; 1598 if (new_lsr & LSR_OVER_ERR) 1599 icount->overrun++; 1600 if (new_lsr & LSR_PAR_ERR) 1601 icount->parity++; 1602 if (new_lsr & LSR_FRM_ERR) 1603 icount->frame++; 1604} 1605 1606 1607static void edge_interrupt_callback(struct urb *urb) 1608{ 1609 struct edgeport_serial *edge_serial = urb->context; 1610 struct usb_serial_port *port; 1611 struct edgeport_port *edge_port; 1612 unsigned char *data = urb->transfer_buffer; 1613 int length = urb->actual_length; 1614 int port_number; 1615 int function; 1616 int retval; 1617 __u8 lsr; 1618 __u8 msr; 1619 int status = urb->status; 1620 1621 dbg("%s", __func__); 1622 1623 switch (status) { 1624 case 0: 1625 /* success */ 1626 break; 1627 case -ECONNRESET: 1628 case -ENOENT: 1629 case -ESHUTDOWN: 1630 /* this urb is terminated, clean up */ 1631 dbg("%s - urb shutting down with status: %d", 1632 __func__, status); 1633 return; 1634 default: 1635 dev_err(&urb->dev->dev, "%s - nonzero urb status received: " 1636 "%d\n", __func__, status); 1637 goto exit; 1638 } 1639 1640 if (!length) { 1641 dbg("%s - no data in urb", __func__); 1642 goto exit; 1643 } 1644 1645 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, 1646 __func__, length, data); 1647 1648 if (length != 2) { 1649 dbg("%s - expecting packet of size 2, got %d", 1650 __func__, length); 1651 goto exit; 1652 } 1653 1654 port_number = TIUMP_GET_PORT_FROM_CODE(data[0]); 1655 function = TIUMP_GET_FUNC_FROM_CODE(data[0]); 1656 dbg("%s - port_number %d, function %d, info 0x%x", 1657 __func__, port_number, function, data[1]); 1658 port = edge_serial->serial->port[port_number]; 1659 edge_port = usb_get_serial_port_data(port); 1660 if (!edge_port) { 1661 dbg("%s - edge_port not found", __func__); 1662 return; 1663 } 1664 switch (function) { 1665 case TIUMP_INTERRUPT_CODE_LSR: 1666 lsr = map_line_status(data[1]); 1667 if (lsr & UMP_UART_LSR_DATA_MASK) { 1668 /* Save the LSR event for bulk read 1669 completion routine */ 1670 dbg("%s - LSR Event Port %u LSR Status = %02x", 1671 __func__, port_number, lsr); 1672 edge_port->lsr_event = 1; 1673 edge_port->lsr_mask = lsr; 1674 } else { 1675 dbg("%s - ===== Port %d LSR Status = %02x ======", 1676 __func__, port_number, lsr); 1677 handle_new_lsr(edge_port, 0, lsr, 0); 1678 } 1679 break; 1680 1681 case TIUMP_INTERRUPT_CODE_MSR: /* MSR */ 1682 /* Copy MSR from UMP */ 1683 msr = data[1]; 1684 dbg("%s - ===== Port %u MSR Status = %02x ======\n", 1685 __func__, port_number, msr); 1686 handle_new_msr(edge_port, msr); 1687 break; 1688 1689 default: 1690 dev_err(&urb->dev->dev, 1691 "%s - Unknown Interrupt code from UMP %x\n", 1692 __func__, data[1]); 1693 break; 1694 1695 } 1696 1697exit: 1698 retval = usb_submit_urb(urb, GFP_ATOMIC); 1699 if (retval) 1700 dev_err(&urb->dev->dev, 1701 "%s - usb_submit_urb failed with result %d\n", 1702 __func__, retval); 1703} 1704 1705static void edge_bulk_in_callback(struct urb *urb) 1706{ 1707 struct edgeport_port *edge_port = urb->context; 1708 unsigned char *data = urb->transfer_buffer; 1709 struct tty_struct *tty; 1710 int retval = 0; 1711 int port_number; 1712 int status = urb->status; 1713 1714 dbg("%s", __func__); 1715 1716 switch (status) { 1717 case 0: 1718 /* success */ 1719 break; 1720 case -ECONNRESET: 1721 case -ENOENT: 1722 case -ESHUTDOWN: 1723 /* this urb is terminated, clean up */ 1724 dbg("%s - urb shutting down with status: %d", 1725 __func__, status); 1726 return; 1727 default: 1728 dev_err(&urb->dev->dev, 1729 "%s - nonzero read bulk status received: %d\n", 1730 __func__, status); 1731 } 1732 1733 if (status == -EPIPE) 1734 goto exit; 1735 1736 if (status) { 1737 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__); 1738 return; 1739 } 1740 1741 port_number = edge_port->port->number - edge_port->port->serial->minor; 1742 1743 if (edge_port->lsr_event) { 1744 edge_port->lsr_event = 0; 1745 dbg("%s ===== Port %u LSR Status = %02x, Data = %02x ======", 1746 __func__, port_number, edge_port->lsr_mask, *data); 1747 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data); 1748 /* Adjust buffer length/pointer */ 1749 --urb->actual_length; 1750 ++data; 1751 } 1752 1753 tty = edge_port->port->tty; 1754 if (tty && urb->actual_length) { 1755 usb_serial_debug_data(debug, &edge_port->port->dev, 1756 __func__, urb->actual_length, data); 1757 if (edge_port->close_pending) 1758 dbg("%s - close pending, dropping data on the floor", 1759 __func__); 1760 else 1761 edge_tty_recv(&edge_port->port->dev, tty, data, 1762 urb->actual_length); 1763 edge_port->icount.rx += urb->actual_length; 1764 } 1765 1766exit: 1767 /* continue read unless stopped */ 1768 spin_lock(&edge_port->ep_lock); 1769 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) { 1770 urb->dev = edge_port->port->serial->dev; 1771 retval = usb_submit_urb(urb, GFP_ATOMIC); 1772 } else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) { 1773 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED; 1774 } 1775 spin_unlock(&edge_port->ep_lock); 1776 if (retval) 1777 dev_err(&urb->dev->dev, 1778 "%s - usb_submit_urb failed with result %d\n", 1779 __func__, retval); 1780} 1781 1782static void edge_tty_recv(struct device *dev, struct tty_struct *tty, 1783 unsigned char *data, int length) 1784{ 1785 int queued; 1786 1787 tty_buffer_request_room(tty, length); 1788 queued = tty_insert_flip_string(tty, data, length); 1789 if (queued < length) 1790 dev_err(dev, "%s - dropping data, %d bytes lost\n", 1791 __func__, length - queued); 1792 tty_flip_buffer_push(tty); 1793} 1794 1795static void edge_bulk_out_callback(struct urb *urb) 1796{ 1797 struct usb_serial_port *port = urb->context; 1798 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1799 int status = urb->status; 1800 1801 dbg("%s - port %d", __func__, port->number); 1802 1803 edge_port->ep_write_urb_in_use = 0; 1804 1805 switch (status) { 1806 case 0: 1807 /* success */ 1808 break; 1809 case -ECONNRESET: 1810 case -ENOENT: 1811 case -ESHUTDOWN: 1812 /* this urb is terminated, clean up */ 1813 dbg("%s - urb shutting down with status: %d", 1814 __func__, status); 1815 return; 1816 default: 1817 dev_err(&urb->dev->dev, "%s - nonzero write bulk status " 1818 "received: %d\n", __func__, status); 1819 } 1820 1821 /* send any buffered data */ 1822 edge_send(port); 1823} 1824 1825static int edge_open(struct usb_serial_port *port, struct file *filp) 1826{ 1827 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1828 struct edgeport_serial *edge_serial; 1829 struct usb_device *dev; 1830 struct urb *urb; 1831 int port_number; 1832 int status; 1833 u16 open_settings; 1834 u8 transaction_timeout; 1835 1836 dbg("%s - port %d", __func__, port->number); 1837 1838 if (edge_port == NULL) 1839 return -ENODEV; 1840 1841 port->tty->low_latency = low_latency; 1842 1843 port_number = port->number - port->serial->minor; 1844 switch (port_number) { 1845 case 0: 1846 edge_port->uart_base = UMPMEM_BASE_UART1; 1847 edge_port->dma_address = UMPD_OEDB1_ADDRESS; 1848 break; 1849 case 1: 1850 edge_port->uart_base = UMPMEM_BASE_UART2; 1851 edge_port->dma_address = UMPD_OEDB2_ADDRESS; 1852 break; 1853 default: 1854 dev_err(&port->dev, "Unknown port number!!!\n"); 1855 return -ENODEV; 1856 } 1857 1858 dbg("%s - port_number = %d, uart_base = %04x, dma_address = %04x", 1859 __func__, port_number, edge_port->uart_base, 1860 edge_port->dma_address); 1861 1862 dev = port->serial->dev; 1863 1864 memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount)); 1865 init_waitqueue_head(&edge_port->delta_msr_wait); 1866 1867 /* turn off loopback */ 1868 status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0); 1869 if (status) { 1870 dev_err(&port->dev, 1871 "%s - cannot send clear loopback command, %d\n", 1872 __func__, status); 1873 return status; 1874 } 1875 1876 /* set up the port settings */ 1877 edge_set_termios(port, port->tty->termios); 1878 1879 /* open up the port */ 1880 1881 /* milliseconds to timeout for DMA transfer */ 1882 transaction_timeout = 2; 1883 1884 edge_port->ump_read_timeout = 1885 max(20, ((transaction_timeout * 3) / 2)); 1886 1887 /* milliseconds to timeout for DMA transfer */ 1888 open_settings = (u8)(UMP_DMA_MODE_CONTINOUS | 1889 UMP_PIPE_TRANS_TIMEOUT_ENA | 1890 (transaction_timeout << 2)); 1891 1892 dbg("%s - Sending UMPC_OPEN_PORT", __func__); 1893 1894 /* Tell TI to open and start the port */ 1895 status = send_cmd(dev, UMPC_OPEN_PORT, 1896 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0); 1897 if (status) { 1898 dev_err(&port->dev, "%s - cannot send open command, %d\n", 1899 __func__, status); 1900 return status; 1901 } 1902 1903 /* Start the DMA? */ 1904 status = send_cmd(dev, UMPC_START_PORT, 1905 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0); 1906 if (status) { 1907 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n", 1908 __func__, status); 1909 return status; 1910 } 1911 1912 /* Clear TX and RX buffers in UMP */ 1913 status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN); 1914 if (status) { 1915 dev_err(&port->dev, 1916 "%s - cannot send clear buffers command, %d\n", 1917 __func__, status); 1918 return status; 1919 } 1920 1921 /* Read Initial MSR */ 1922 status = ti_vread_sync(dev, UMPC_READ_MSR, 0, 1923 (__u16)(UMPM_UART1_PORT + port_number), 1924 &edge_port->shadow_msr, 1); 1925 if (status) { 1926 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n", 1927 __func__, status); 1928 return status; 1929 } 1930 1931 dbg("ShadowMSR 0x%X", edge_port->shadow_msr); 1932 1933 /* Set Initial MCR */ 1934 edge_port->shadow_mcr = MCR_RTS | MCR_DTR; 1935 dbg("ShadowMCR 0x%X", edge_port->shadow_mcr); 1936 1937 edge_serial = edge_port->edge_serial; 1938 if (mutex_lock_interruptible(&edge_serial->es_lock)) 1939 return -ERESTARTSYS; 1940 if (edge_serial->num_ports_open == 0) { 1941 /* we are the first port to open, post the interrupt urb */ 1942 urb = edge_serial->serial->port[0]->interrupt_in_urb; 1943 if (!urb) { 1944 dev_err(&port->dev, 1945 "%s - no interrupt urb present, exiting\n", 1946 __func__); 1947 status = -EINVAL; 1948 goto release_es_lock; 1949 } 1950 urb->complete = edge_interrupt_callback; 1951 urb->context = edge_serial; 1952 urb->dev = dev; 1953 status = usb_submit_urb(urb, GFP_KERNEL); 1954 if (status) { 1955 dev_err(&port->dev, 1956 "%s - usb_submit_urb failed with value %d\n", 1957 __func__, status); 1958 goto release_es_lock; 1959 } 1960 } 1961 1962 /* 1963 * reset the data toggle on the bulk endpoints to work around bug in 1964 * host controllers where things get out of sync some times 1965 */ 1966 usb_clear_halt(dev, port->write_urb->pipe); 1967 usb_clear_halt(dev, port->read_urb->pipe); 1968 1969 /* start up our bulk read urb */ 1970 urb = port->read_urb; 1971 if (!urb) { 1972 dev_err(&port->dev, "%s - no read urb present, exiting\n", 1973 __func__); 1974 status = -EINVAL; 1975 goto unlink_int_urb; 1976 } 1977 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING; 1978 urb->complete = edge_bulk_in_callback; 1979 urb->context = edge_port; 1980 urb->dev = dev; 1981 status = usb_submit_urb(urb, GFP_KERNEL); 1982 if (status) { 1983 dev_err(&port->dev, 1984 "%s - read bulk usb_submit_urb failed with value %d\n", 1985 __func__, status); 1986 goto unlink_int_urb; 1987 } 1988 1989 ++edge_serial->num_ports_open; 1990 1991 dbg("%s - exited", __func__); 1992 1993 goto release_es_lock; 1994 1995unlink_int_urb: 1996 if (edge_port->edge_serial->num_ports_open == 0) 1997 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 1998release_es_lock: 1999 mutex_unlock(&edge_serial->es_lock); 2000 return status; 2001} 2002 2003static void edge_close(struct usb_serial_port *port, struct file *filp) 2004{ 2005 struct edgeport_serial *edge_serial; 2006 struct edgeport_port *edge_port; 2007 int port_number; 2008 int status; 2009 2010 dbg("%s - port %d", __func__, port->number); 2011 2012 edge_serial = usb_get_serial_data(port->serial); 2013 edge_port = usb_get_serial_port_data(port); 2014 if (edge_serial == NULL || edge_port == NULL) 2015 return; 2016 2017 /* The bulkreadcompletion routine will check 2018 * this flag and dump add read data */ 2019 edge_port->close_pending = 1; 2020 2021 /* chase the port close and flush */ 2022 chase_port(edge_port, (HZ * closing_wait) / 100, 1); 2023 2024 usb_kill_urb(port->read_urb); 2025 usb_kill_urb(port->write_urb); 2026 edge_port->ep_write_urb_in_use = 0; 2027 2028 /* assuming we can still talk to the device, 2029 * send a close port command to it */ 2030 dbg("%s - send umpc_close_port", __func__); 2031 port_number = port->number - port->serial->minor; 2032 status = send_cmd(port->serial->dev, 2033 UMPC_CLOSE_PORT, 2034 (__u8)(UMPM_UART1_PORT + port_number), 2035 0, 2036 NULL, 2037 0); 2038 mutex_lock(&edge_serial->es_lock); 2039 --edge_port->edge_serial->num_ports_open; 2040 if (edge_port->edge_serial->num_ports_open <= 0) { 2041 /* last port is now closed, let's shut down our interrupt urb */ 2042 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 2043 edge_port->edge_serial->num_ports_open = 0; 2044 } 2045 mutex_unlock(&edge_serial->es_lock); 2046 edge_port->close_pending = 0; 2047 2048 dbg("%s - exited", __func__); 2049} 2050 2051static int edge_write(struct usb_serial_port *port, const unsigned char *data, 2052 int count) 2053{ 2054 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2055 unsigned long flags; 2056 2057 dbg("%s - port %d", __func__, port->number); 2058 2059 if (count == 0) { 2060 dbg("%s - write request of 0 bytes", __func__); 2061 return 0; 2062 } 2063 2064 if (edge_port == NULL) 2065 return -ENODEV; 2066 if (edge_port->close_pending == 1) 2067 return -ENODEV; 2068 2069 spin_lock_irqsave(&edge_port->ep_lock, flags); 2070 count = edge_buf_put(edge_port->ep_out_buf, data, count); 2071 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2072 2073 edge_send(port); 2074 2075 return count; 2076} 2077 2078static void edge_send(struct usb_serial_port *port) 2079{ 2080 int count, result; 2081 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2082 struct tty_struct *tty = port->tty; 2083 unsigned long flags; 2084 2085 2086 dbg("%s - port %d", __func__, port->number); 2087 2088 spin_lock_irqsave(&edge_port->ep_lock, flags); 2089 2090 if (edge_port->ep_write_urb_in_use) { 2091 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2092 return; 2093 } 2094 2095 count = edge_buf_get(edge_port->ep_out_buf, 2096 port->write_urb->transfer_buffer, 2097 port->bulk_out_size); 2098 2099 if (count == 0) { 2100 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2101 return; 2102 } 2103 2104 edge_port->ep_write_urb_in_use = 1; 2105 2106 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2107 2108 usb_serial_debug_data(debug, &port->dev, __func__, count, 2109 port->write_urb->transfer_buffer); 2110 2111 /* set up our urb */ 2112 usb_fill_bulk_urb(port->write_urb, port->serial->dev, 2113 usb_sndbulkpipe(port->serial->dev, 2114 port->bulk_out_endpointAddress), 2115 port->write_urb->transfer_buffer, count, 2116 edge_bulk_out_callback, 2117 port); 2118 2119 /* send the data out the bulk port */ 2120 result = usb_submit_urb(port->write_urb, GFP_ATOMIC); 2121 if (result) { 2122 dev_err(&port->dev, 2123 "%s - failed submitting write urb, error %d\n", 2124 __func__, result); 2125 edge_port->ep_write_urb_in_use = 0; 2126 /* TODO: reschedule edge_send */ 2127 } else 2128 edge_port->icount.tx += count; 2129 2130 /* wakeup any process waiting for writes to complete */ 2131 /* there is now more room in the buffer for new writes */ 2132 if (tty) 2133 tty_wakeup(tty); 2134} 2135 2136static int edge_write_room(struct usb_serial_port *port) 2137{ 2138 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2139 int room = 0; 2140 unsigned long flags; 2141 2142 dbg("%s - port %d", __func__, port->number); 2143 2144 if (edge_port == NULL) 2145 return 0; 2146 if (edge_port->close_pending == 1) 2147 return 0; 2148 2149 spin_lock_irqsave(&edge_port->ep_lock, flags); 2150 room = edge_buf_space_avail(edge_port->ep_out_buf); 2151 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2152 2153 dbg("%s - returns %d", __func__, room); 2154 return room; 2155} 2156 2157static int edge_chars_in_buffer(struct usb_serial_port *port) 2158{ 2159 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2160 int chars = 0; 2161 unsigned long flags; 2162 2163 dbg("%s - port %d", __func__, port->number); 2164 2165 if (edge_port == NULL) 2166 return 0; 2167 if (edge_port->close_pending == 1) 2168 return 0; 2169 2170 spin_lock_irqsave(&edge_port->ep_lock, flags); 2171 chars = edge_buf_data_avail(edge_port->ep_out_buf); 2172 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2173 2174 dbg("%s - returns %d", __func__, chars); 2175 return chars; 2176} 2177 2178static void edge_throttle(struct usb_serial_port *port) 2179{ 2180 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2181 struct tty_struct *tty = port->tty; 2182 int status; 2183 2184 dbg("%s - port %d", __func__, port->number); 2185 2186 if (edge_port == NULL) 2187 return; 2188 2189 /* if we are implementing XON/XOFF, send the stop character */ 2190 if (I_IXOFF(tty)) { 2191 unsigned char stop_char = STOP_CHAR(tty); 2192 status = edge_write(port, &stop_char, 1); 2193 if (status <= 0) 2194 dev_err(&port->dev, 2195 "%s - failed to write stop character, %d\n", 2196 __func__, status); 2197 } 2198 2199 /* if we are implementing RTS/CTS, stop reads */ 2200 /* and the Edgeport will clear the RTS line */ 2201 if (C_CRTSCTS(tty)) 2202 stop_read(edge_port); 2203 2204} 2205 2206static void edge_unthrottle(struct usb_serial_port *port) 2207{ 2208 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2209 struct tty_struct *tty = port->tty; 2210 int status; 2211 2212 dbg("%s - port %d", __func__, port->number); 2213 2214 if (edge_port == NULL) 2215 return; 2216 2217 /* if we are implementing XON/XOFF, send the start character */ 2218 if (I_IXOFF(tty)) { 2219 unsigned char start_char = START_CHAR(tty); 2220 status = edge_write(port, &start_char, 1); 2221 if (status <= 0) 2222 dev_err(&port->dev, 2223 "%s - failed to write start character, %d\n", 2224 __func__, status); 2225 } 2226 /* if we are implementing RTS/CTS, restart reads */ 2227 /* are the Edgeport will assert the RTS line */ 2228 if (C_CRTSCTS(tty)) { 2229 status = restart_read(edge_port); 2230 if (status) 2231 dev_err(&port->dev, 2232 "%s - read bulk usb_submit_urb failed: %d\n", 2233 __func__, status); 2234 } 2235 2236} 2237 2238static void stop_read(struct edgeport_port *edge_port) 2239{ 2240 unsigned long flags; 2241 2242 spin_lock_irqsave(&edge_port->ep_lock, flags); 2243 2244 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) 2245 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING; 2246 edge_port->shadow_mcr &= ~MCR_RTS; 2247 2248 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2249} 2250 2251static int restart_read(struct edgeport_port *edge_port) 2252{ 2253 struct urb *urb; 2254 int status = 0; 2255 unsigned long flags; 2256 2257 spin_lock_irqsave(&edge_port->ep_lock, flags); 2258 2259 if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) { 2260 urb = edge_port->port->read_urb; 2261 urb->complete = edge_bulk_in_callback; 2262 urb->context = edge_port; 2263 urb->dev = edge_port->port->serial->dev; 2264 status = usb_submit_urb(urb, GFP_ATOMIC); 2265 } 2266 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING; 2267 edge_port->shadow_mcr |= MCR_RTS; 2268 2269 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2270 2271 return status; 2272} 2273 2274static void change_port_settings(struct edgeport_port *edge_port, 2275 struct ktermios *old_termios) 2276{ 2277 struct ump_uart_config *config; 2278 struct tty_struct *tty; 2279 int baud; 2280 unsigned cflag; 2281 int status; 2282 int port_number = edge_port->port->number - 2283 edge_port->port->serial->minor; 2284 2285 dbg("%s - port %d", __func__, edge_port->port->number); 2286 2287 tty = edge_port->port->tty; 2288 2289 config = kmalloc(sizeof(*config), GFP_KERNEL); 2290 if (!config) { 2291 *tty->termios = *old_termios; 2292 dev_err(&edge_port->port->dev, "%s - out of memory\n", 2293 __func__); 2294 return; 2295 } 2296 2297 cflag = tty->termios->c_cflag; 2298 2299 config->wFlags = 0; 2300 2301 /* These flags must be set */ 2302 config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT; 2303 config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR; 2304 config->bUartMode = (__u8)(edge_port->bUartMode); 2305 2306 switch (cflag & CSIZE) { 2307 case CS5: 2308 config->bDataBits = UMP_UART_CHAR5BITS; 2309 dbg("%s - data bits = 5", __func__); 2310 break; 2311 case CS6: 2312 config->bDataBits = UMP_UART_CHAR6BITS; 2313 dbg("%s - data bits = 6", __func__); 2314 break; 2315 case CS7: 2316 config->bDataBits = UMP_UART_CHAR7BITS; 2317 dbg("%s - data bits = 7", __func__); 2318 break; 2319 default: 2320 case CS8: 2321 config->bDataBits = UMP_UART_CHAR8BITS; 2322 dbg("%s - data bits = 8", __func__); 2323 break; 2324 } 2325 2326 if (cflag & PARENB) { 2327 if (cflag & PARODD) { 2328 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY; 2329 config->bParity = UMP_UART_ODDPARITY; 2330 dbg("%s - parity = odd", __func__); 2331 } else { 2332 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY; 2333 config->bParity = UMP_UART_EVENPARITY; 2334 dbg("%s - parity = even", __func__); 2335 } 2336 } else { 2337 config->bParity = UMP_UART_NOPARITY; 2338 dbg("%s - parity = none", __func__); 2339 } 2340 2341 if (cflag & CSTOPB) { 2342 config->bStopBits = UMP_UART_STOPBIT2; 2343 dbg("%s - stop bits = 2", __func__); 2344 } else { 2345 config->bStopBits = UMP_UART_STOPBIT1; 2346 dbg("%s - stop bits = 1", __func__); 2347 } 2348 2349 /* figure out the flow control settings */ 2350 if (cflag & CRTSCTS) { 2351 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW; 2352 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW; 2353 dbg("%s - RTS/CTS is enabled", __func__); 2354 } else { 2355 dbg("%s - RTS/CTS is disabled", __func__); 2356 tty->hw_stopped = 0; 2357 restart_read(edge_port); 2358 } 2359 2360 /* if we are implementing XON/XOFF, set the start and stop 2361 character in the device */ 2362 config->cXon = START_CHAR(tty); 2363 config->cXoff = STOP_CHAR(tty); 2364 2365 /* if we are implementing INBOUND XON/XOFF */ 2366 if (I_IXOFF(tty)) { 2367 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X; 2368 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", 2369 __func__, config->cXon, config->cXoff); 2370 } else 2371 dbg("%s - INBOUND XON/XOFF is disabled", __func__); 2372 2373 /* if we are implementing OUTBOUND XON/XOFF */ 2374 if (I_IXON(tty)) { 2375 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X; 2376 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", 2377 __func__, config->cXon, config->cXoff); 2378 } else 2379 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__); 2380 2381 tty->termios->c_cflag &= ~CMSPAR; 2382 2383 /* Round the baud rate */ 2384 baud = tty_get_baud_rate(tty); 2385 if (!baud) { 2386 /* pick a default, any default... */ 2387 baud = 9600; 2388 } else 2389 tty_encode_baud_rate(tty, baud, baud); 2390 2391 edge_port->baud_rate = baud; 2392 config->wBaudRate = (__u16)((461550L + baud/2) / baud); 2393 2394 /* FIXME: Recompute actual baud from divisor here */ 2395 2396 dbg("%s - baud rate = %d, wBaudRate = %d", __func__, baud, 2397 config->wBaudRate); 2398 2399 dbg("wBaudRate: %d", (int)(461550L / config->wBaudRate)); 2400 dbg("wFlags: 0x%x", config->wFlags); 2401 dbg("bDataBits: %d", config->bDataBits); 2402 dbg("bParity: %d", config->bParity); 2403 dbg("bStopBits: %d", config->bStopBits); 2404 dbg("cXon: %d", config->cXon); 2405 dbg("cXoff: %d", config->cXoff); 2406 dbg("bUartMode: %d", config->bUartMode); 2407 2408 /* move the word values into big endian mode */ 2409 cpu_to_be16s(&config->wFlags); 2410 cpu_to_be16s(&config->wBaudRate); 2411 2412 status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG, 2413 (__u8)(UMPM_UART1_PORT + port_number), 2414 0, (__u8 *)config, sizeof(*config)); 2415 if (status) 2416 dbg("%s - error %d when trying to write config to device", 2417 __func__, status); 2418 kfree(config); 2419 return; 2420} 2421 2422static void edge_set_termios(struct usb_serial_port *port, 2423 struct ktermios *old_termios) 2424{ 2425 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2426 struct tty_struct *tty = port->tty; 2427 2428 dbg("%s - clfag %08x iflag %08x", __func__, 2429 tty->termios->c_cflag, tty->termios->c_iflag); 2430 dbg("%s - old clfag %08x old iflag %08x", __func__, 2431 old_termios->c_cflag, old_termios->c_iflag); 2432 dbg("%s - port %d", __func__, port->number); 2433 2434 if (edge_port == NULL) 2435 return; 2436 /* change the port settings to the new ones specified */ 2437 change_port_settings(edge_port, old_termios); 2438} 2439 2440static int edge_tiocmset(struct usb_serial_port *port, struct file *file, 2441 unsigned int set, unsigned int clear) 2442{ 2443 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2444 unsigned int mcr; 2445 unsigned long flags; 2446 2447 dbg("%s - port %d", __func__, port->number); 2448 2449 spin_lock_irqsave(&edge_port->ep_lock, flags); 2450 mcr = edge_port->shadow_mcr; 2451 if (set & TIOCM_RTS) 2452 mcr |= MCR_RTS; 2453 if (set & TIOCM_DTR) 2454 mcr |= MCR_DTR; 2455 if (set & TIOCM_LOOP) 2456 mcr |= MCR_LOOPBACK; 2457 2458 if (clear & TIOCM_RTS) 2459 mcr &= ~MCR_RTS; 2460 if (clear & TIOCM_DTR) 2461 mcr &= ~MCR_DTR; 2462 if (clear & TIOCM_LOOP) 2463 mcr &= ~MCR_LOOPBACK; 2464 2465 edge_port->shadow_mcr = mcr; 2466 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2467 2468 restore_mcr(edge_port, mcr); 2469 return 0; 2470} 2471 2472static int edge_tiocmget(struct usb_serial_port *port, struct file *file) 2473{ 2474 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2475 unsigned int result = 0; 2476 unsigned int msr; 2477 unsigned int mcr; 2478 unsigned long flags; 2479 2480 dbg("%s - port %d", __func__, port->number); 2481 2482 spin_lock_irqsave(&edge_port->ep_lock, flags); 2483 2484 msr = edge_port->shadow_msr; 2485 mcr = edge_port->shadow_mcr; 2486 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 2487 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 2488 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 2489 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 2490 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 2491 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 2492 2493 2494 dbg("%s -- %x", __func__, result); 2495 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2496 2497 return result; 2498} 2499 2500static int get_serial_info(struct edgeport_port *edge_port, 2501 struct serial_struct __user *retinfo) 2502{ 2503 struct serial_struct tmp; 2504 2505 if (!retinfo) 2506 return -EFAULT; 2507 2508 memset(&tmp, 0, sizeof(tmp)); 2509 2510 tmp.type = PORT_16550A; 2511 tmp.line = edge_port->port->serial->minor; 2512 tmp.port = edge_port->port->number; 2513 tmp.irq = 0; 2514 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2515 tmp.xmit_fifo_size = edge_port->port->bulk_out_size; 2516 tmp.baud_base = 9600; 2517 tmp.close_delay = 5*HZ; 2518 tmp.closing_wait = closing_wait; 2519 2520 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2521 return -EFAULT; 2522 return 0; 2523} 2524 2525static int edge_ioctl(struct usb_serial_port *port, struct file *file, 2526 unsigned int cmd, unsigned long arg) 2527{ 2528 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2529 struct async_icount cnow; 2530 struct async_icount cprev; 2531 2532 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 2533 2534 switch (cmd) { 2535 case TIOCGSERIAL: 2536 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number); 2537 return get_serial_info(edge_port, 2538 (struct serial_struct __user *) arg); 2539 case TIOCMIWAIT: 2540 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number); 2541 cprev = edge_port->icount; 2542 while (1) { 2543 interruptible_sleep_on(&edge_port->delta_msr_wait); 2544 /* see if a signal did it */ 2545 if (signal_pending(current)) 2546 return -ERESTARTSYS; 2547 cnow = edge_port->icount; 2548 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2549 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2550 return -EIO; /* no change => error */ 2551 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2552 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2553 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2554 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2555 return 0; 2556 } 2557 cprev = cnow; 2558 } 2559 /* not reached */ 2560 break; 2561 case TIOCGICOUNT: 2562 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, 2563 port->number, edge_port->icount.rx, edge_port->icount.tx); 2564 if (copy_to_user((void __user *)arg, &edge_port->icount, 2565 sizeof(edge_port->icount))) 2566 return -EFAULT; 2567 return 0; 2568 } 2569 return -ENOIOCTLCMD; 2570} 2571 2572static void edge_break(struct usb_serial_port *port, int on) 2573{ 2574 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2575 int status; 2576 int bv = 0; /* Off */ 2577 2578 dbg("%s - state = %d", __func__, on); 2579 2580 /* chase the port close */ 2581 chase_port(edge_port, 0, 0); 2582 2583 if (on == -1) 2584 bv = 1; /* On */ 2585 status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv); 2586 if (status) 2587 dbg("%s - error %d sending break set/clear command.", 2588 __func__, status); 2589} 2590 2591static int edge_startup(struct usb_serial *serial) 2592{ 2593 struct edgeport_serial *edge_serial; 2594 struct edgeport_port *edge_port; 2595 struct usb_device *dev; 2596 int status; 2597 int i; 2598 2599 dev = serial->dev; 2600 2601 /* create our private serial structure */ 2602 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); 2603 if (edge_serial == NULL) { 2604 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); 2605 return -ENOMEM; 2606 } 2607 mutex_init(&edge_serial->es_lock); 2608 edge_serial->serial = serial; 2609 usb_set_serial_data(serial, edge_serial); 2610 2611 status = download_fw(edge_serial); 2612 if (status) { 2613 kfree(edge_serial); 2614 return status; 2615 } 2616 2617 /* set up our port private structures */ 2618 for (i = 0; i < serial->num_ports; ++i) { 2619 edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL); 2620 if (edge_port == NULL) { 2621 dev_err(&serial->dev->dev, "%s - Out of memory\n", 2622 __func__); 2623 goto cleanup; 2624 } 2625 spin_lock_init(&edge_port->ep_lock); 2626 edge_port->ep_out_buf = edge_buf_alloc(EDGE_OUT_BUF_SIZE); 2627 if (edge_port->ep_out_buf == NULL) { 2628 dev_err(&serial->dev->dev, "%s - Out of memory\n", 2629 __func__); 2630 kfree(edge_port); 2631 goto cleanup; 2632 } 2633 edge_port->port = serial->port[i]; 2634 edge_port->edge_serial = edge_serial; 2635 usb_set_serial_port_data(serial->port[i], edge_port); 2636 edge_port->bUartMode = default_uart_mode; 2637 } 2638 2639 return 0; 2640 2641cleanup: 2642 for (--i; i >= 0; --i) { 2643 edge_port = usb_get_serial_port_data(serial->port[i]); 2644 edge_buf_free(edge_port->ep_out_buf); 2645 kfree(edge_port); 2646 usb_set_serial_port_data(serial->port[i], NULL); 2647 } 2648 kfree(edge_serial); 2649 usb_set_serial_data(serial, NULL); 2650 return -ENOMEM; 2651} 2652 2653static void edge_shutdown(struct usb_serial *serial) 2654{ 2655 int i; 2656 struct edgeport_port *edge_port; 2657 2658 dbg("%s", __func__); 2659 2660 for (i = 0; i < serial->num_ports; ++i) { 2661 edge_port = usb_get_serial_port_data(serial->port[i]); 2662 edge_remove_sysfs_attrs(edge_port->port); 2663 edge_buf_free(edge_port->ep_out_buf); 2664 kfree(edge_port); 2665 usb_set_serial_port_data(serial->port[i], NULL); 2666 } 2667 kfree(usb_get_serial_data(serial)); 2668 usb_set_serial_data(serial, NULL); 2669} 2670 2671 2672/* Sysfs Attributes */ 2673 2674static ssize_t show_uart_mode(struct device *dev, 2675 struct device_attribute *attr, char *buf) 2676{ 2677 struct usb_serial_port *port = to_usb_serial_port(dev); 2678 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2679 2680 return sprintf(buf, "%d\n", edge_port->bUartMode); 2681} 2682 2683static ssize_t store_uart_mode(struct device *dev, 2684 struct device_attribute *attr, const char *valbuf, size_t count) 2685{ 2686 struct usb_serial_port *port = to_usb_serial_port(dev); 2687 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2688 unsigned int v = simple_strtoul(valbuf, NULL, 0); 2689 2690 dbg("%s: setting uart_mode = %d", __func__, v); 2691 2692 if (v < 256) 2693 edge_port->bUartMode = v; 2694 else 2695 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v); 2696 2697 return count; 2698} 2699 2700static DEVICE_ATTR(uart_mode, S_IWUSR | S_IRUGO, show_uart_mode, 2701 store_uart_mode); 2702 2703static int edge_create_sysfs_attrs(struct usb_serial_port *port) 2704{ 2705 return device_create_file(&port->dev, &dev_attr_uart_mode); 2706} 2707 2708static int edge_remove_sysfs_attrs(struct usb_serial_port *port) 2709{ 2710 device_remove_file(&port->dev, &dev_attr_uart_mode); 2711 return 0; 2712} 2713 2714 2715/* Circular Buffer */ 2716 2717/* 2718 * edge_buf_alloc 2719 * 2720 * Allocate a circular buffer and all associated memory. 2721 */ 2722 2723static struct edge_buf *edge_buf_alloc(unsigned int size) 2724{ 2725 struct edge_buf *eb; 2726 2727 2728 if (size == 0) 2729 return NULL; 2730 2731 eb = kmalloc(sizeof(struct edge_buf), GFP_KERNEL); 2732 if (eb == NULL) 2733 return NULL; 2734 2735 eb->buf_buf = kmalloc(size, GFP_KERNEL); 2736 if (eb->buf_buf == NULL) { 2737 kfree(eb); 2738 return NULL; 2739 } 2740 2741 eb->buf_size = size; 2742 eb->buf_get = eb->buf_put = eb->buf_buf; 2743 2744 return eb; 2745} 2746 2747 2748/* 2749 * edge_buf_free 2750 * 2751 * Free the buffer and all associated memory. 2752 */ 2753 2754static void edge_buf_free(struct edge_buf *eb) 2755{ 2756 if (eb) { 2757 kfree(eb->buf_buf); 2758 kfree(eb); 2759 } 2760} 2761 2762 2763/* 2764 * edge_buf_clear 2765 * 2766 * Clear out all data in the circular buffer. 2767 */ 2768 2769static void edge_buf_clear(struct edge_buf *eb) 2770{ 2771 if (eb != NULL) 2772 eb->buf_get = eb->buf_put; 2773 /* equivalent to a get of all data available */ 2774} 2775 2776 2777/* 2778 * edge_buf_data_avail 2779 * 2780 * Return the number of bytes of data available in the circular 2781 * buffer. 2782 */ 2783 2784static unsigned int edge_buf_data_avail(struct edge_buf *eb) 2785{ 2786 if (eb == NULL) 2787 return 0; 2788 return ((eb->buf_size + eb->buf_put - eb->buf_get) % eb->buf_size); 2789} 2790 2791 2792/* 2793 * edge_buf_space_avail 2794 * 2795 * Return the number of bytes of space available in the circular 2796 * buffer. 2797 */ 2798 2799static unsigned int edge_buf_space_avail(struct edge_buf *eb) 2800{ 2801 if (eb == NULL) 2802 return 0; 2803 return ((eb->buf_size + eb->buf_get - eb->buf_put - 1) % eb->buf_size); 2804} 2805 2806 2807/* 2808 * edge_buf_put 2809 * 2810 * Copy data data from a user buffer and put it into the circular buffer. 2811 * Restrict to the amount of space available. 2812 * 2813 * Return the number of bytes copied. 2814 */ 2815 2816static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf, 2817 unsigned int count) 2818{ 2819 unsigned int len; 2820 2821 2822 if (eb == NULL) 2823 return 0; 2824 2825 len = edge_buf_space_avail(eb); 2826 if (count > len) 2827 count = len; 2828 2829 if (count == 0) 2830 return 0; 2831 2832 len = eb->buf_buf + eb->buf_size - eb->buf_put; 2833 if (count > len) { 2834 memcpy(eb->buf_put, buf, len); 2835 memcpy(eb->buf_buf, buf+len, count - len); 2836 eb->buf_put = eb->buf_buf + count - len; 2837 } else { 2838 memcpy(eb->buf_put, buf, count); 2839 if (count < len) 2840 eb->buf_put += count; 2841 else /* count == len */ 2842 eb->buf_put = eb->buf_buf; 2843 } 2844 2845 return count; 2846} 2847 2848 2849/* 2850 * edge_buf_get 2851 * 2852 * Get data from the circular buffer and copy to the given buffer. 2853 * Restrict to the amount of data available. 2854 * 2855 * Return the number of bytes copied. 2856 */ 2857 2858static unsigned int edge_buf_get(struct edge_buf *eb, char *buf, 2859 unsigned int count) 2860{ 2861 unsigned int len; 2862 2863 2864 if (eb == NULL) 2865 return 0; 2866 2867 len = edge_buf_data_avail(eb); 2868 if (count > len) 2869 count = len; 2870 2871 if (count == 0) 2872 return 0; 2873 2874 len = eb->buf_buf + eb->buf_size - eb->buf_get; 2875 if (count > len) { 2876 memcpy(buf, eb->buf_get, len); 2877 memcpy(buf+len, eb->buf_buf, count - len); 2878 eb->buf_get = eb->buf_buf + count - len; 2879 } else { 2880 memcpy(buf, eb->buf_get, count); 2881 if (count < len) 2882 eb->buf_get += count; 2883 else /* count == len */ 2884 eb->buf_get = eb->buf_buf; 2885 } 2886 2887 return count; 2888} 2889 2890 2891static struct usb_serial_driver edgeport_1port_device = { 2892 .driver = { 2893 .owner = THIS_MODULE, 2894 .name = "edgeport_ti_1", 2895 }, 2896 .description = "Edgeport TI 1 port adapter", 2897 .usb_driver = &io_driver, 2898 .id_table = edgeport_1port_id_table, 2899 .num_ports = 1, 2900 .open = edge_open, 2901 .close = edge_close, 2902 .throttle = edge_throttle, 2903 .unthrottle = edge_unthrottle, 2904 .attach = edge_startup, 2905 .shutdown = edge_shutdown, 2906 .port_probe = edge_create_sysfs_attrs, 2907 .ioctl = edge_ioctl, 2908 .set_termios = edge_set_termios, 2909 .tiocmget = edge_tiocmget, 2910 .tiocmset = edge_tiocmset, 2911 .write = edge_write, 2912 .write_room = edge_write_room, 2913 .chars_in_buffer = edge_chars_in_buffer, 2914 .break_ctl = edge_break, 2915 .read_int_callback = edge_interrupt_callback, 2916 .read_bulk_callback = edge_bulk_in_callback, 2917 .write_bulk_callback = edge_bulk_out_callback, 2918}; 2919 2920static struct usb_serial_driver edgeport_2port_device = { 2921 .driver = { 2922 .owner = THIS_MODULE, 2923 .name = "edgeport_ti_2", 2924 }, 2925 .description = "Edgeport TI 2 port adapter", 2926 .usb_driver = &io_driver, 2927 .id_table = edgeport_2port_id_table, 2928 .num_ports = 2, 2929 .open = edge_open, 2930 .close = edge_close, 2931 .throttle = edge_throttle, 2932 .unthrottle = edge_unthrottle, 2933 .attach = edge_startup, 2934 .shutdown = edge_shutdown, 2935 .port_probe = edge_create_sysfs_attrs, 2936 .ioctl = edge_ioctl, 2937 .set_termios = edge_set_termios, 2938 .tiocmget = edge_tiocmget, 2939 .tiocmset = edge_tiocmset, 2940 .write = edge_write, 2941 .write_room = edge_write_room, 2942 .chars_in_buffer = edge_chars_in_buffer, 2943 .break_ctl = edge_break, 2944 .read_int_callback = edge_interrupt_callback, 2945 .read_bulk_callback = edge_bulk_in_callback, 2946 .write_bulk_callback = edge_bulk_out_callback, 2947}; 2948 2949 2950static int __init edgeport_init(void) 2951{ 2952 int retval; 2953 retval = usb_serial_register(&edgeport_1port_device); 2954 if (retval) 2955 goto failed_1port_device_register; 2956 retval = usb_serial_register(&edgeport_2port_device); 2957 if (retval) 2958 goto failed_2port_device_register; 2959 retval = usb_register(&io_driver); 2960 if (retval) 2961 goto failed_usb_register; 2962 info(DRIVER_DESC " " DRIVER_VERSION); 2963 return 0; 2964failed_usb_register: 2965 usb_serial_deregister(&edgeport_2port_device); 2966failed_2port_device_register: 2967 usb_serial_deregister(&edgeport_1port_device); 2968failed_1port_device_register: 2969 return retval; 2970} 2971 2972static void __exit edgeport_exit(void) 2973{ 2974 usb_deregister(&io_driver); 2975 usb_serial_deregister(&edgeport_1port_device); 2976 usb_serial_deregister(&edgeport_2port_device); 2977} 2978 2979module_init(edgeport_init); 2980module_exit(edgeport_exit); 2981 2982/* Module information */ 2983MODULE_AUTHOR(DRIVER_AUTHOR); 2984MODULE_DESCRIPTION(DRIVER_DESC); 2985MODULE_LICENSE("GPL"); 2986MODULE_FIRMWARE("edgeport/down3.bin"); 2987 2988module_param(debug, bool, S_IRUGO | S_IWUSR); 2989MODULE_PARM_DESC(debug, "Debug enabled or not"); 2990 2991module_param(low_latency, bool, S_IRUGO | S_IWUSR); 2992MODULE_PARM_DESC(low_latency, "Low latency enabled or not"); 2993 2994module_param(closing_wait, int, S_IRUGO | S_IWUSR); 2995MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs"); 2996 2997module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR); 2998MODULE_PARM_DESC(ignore_cpu_rev, 2999 "Ignore the cpu revision when connecting to a device"); 3000 3001module_param(default_uart_mode, int, S_IRUGO | S_IWUSR); 3002MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ..."); 3003