1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * Edgeport USB Serial Converter driver 4 * 5 * Copyright (C) 2000-2002 Inside Out Networks, All rights reserved. 6 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> 7 * 8 * Supports the following devices: 9 * EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT 10 * 11 * For questions or problems with this driver, contact Inside Out 12 * Networks technical support, or Peter Berger <pberger@brimson.com>, 13 * or Al Borchers <alborchers@steinerpoint.com>. 14 */ 15 16#include <linux/kernel.h> 17#include <linux/jiffies.h> 18#include <linux/errno.h> 19#include <linux/slab.h> 20#include <linux/tty.h> 21#include <linux/tty_driver.h> 22#include <linux/tty_flip.h> 23#include <linux/module.h> 24#include <linux/spinlock.h> 25#include <linux/mutex.h> 26#include <linux/serial.h> 27#include <linux/swab.h> 28#include <linux/kfifo.h> 29#include <linux/ioctl.h> 30#include <linux/firmware.h> 31#include <linux/uaccess.h> 32#include <linux/usb.h> 33#include <linux/usb/serial.h> 34 35#include "io_16654.h" 36#include "io_usbvend.h" 37#include "io_ti.h" 38 39#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" 40#define DRIVER_DESC "Edgeport USB Serial Driver" 41 42#define EPROM_PAGE_SIZE 64 43 44 45/* different hardware types */ 46#define HARDWARE_TYPE_930 0 47#define HARDWARE_TYPE_TIUMP 1 48 49/* IOCTL_PRIVATE_TI_GET_MODE Definitions */ 50#define TI_MODE_CONFIGURING 0 /* Device has not entered start device */ 51#define TI_MODE_BOOT 1 /* Staying in boot mode */ 52#define TI_MODE_DOWNLOAD 2 /* Made it to download mode */ 53#define TI_MODE_TRANSITIONING 3 /* 54 * Currently in boot mode but 55 * transitioning to download mode 56 */ 57 58/* read urb state */ 59#define EDGE_READ_URB_RUNNING 0 60#define EDGE_READ_URB_STOPPING 1 61#define EDGE_READ_URB_STOPPED 2 62 63#define EDGE_CLOSING_WAIT 4000 /* in .01 sec */ 64 65 66/* Product information read from the Edgeport */ 67struct product_info { 68 int TiMode; /* Current TI Mode */ 69 __u8 hardware_type; /* Type of hardware */ 70} __attribute__((packed)); 71 72/* 73 * Edgeport firmware header 74 * 75 * "build_number" has been set to 0 in all three of the images I have 76 * seen, and Digi Tech Support suggests that it is safe to ignore it. 77 * 78 * "length" is the number of bytes of actual data following the header. 79 * 80 * "checksum" is the low order byte resulting from adding the values of 81 * all the data bytes. 82 */ 83struct edgeport_fw_hdr { 84 u8 major_version; 85 u8 minor_version; 86 __le16 build_number; 87 __le16 length; 88 u8 checksum; 89} __packed; 90 91struct edgeport_port { 92 __u16 uart_base; 93 __u16 dma_address; 94 __u8 shadow_msr; 95 __u8 shadow_mcr; 96 __u8 shadow_lsr; 97 __u8 lsr_mask; 98 __u32 ump_read_timeout; /* 99 * Number of milliseconds the UMP will 100 * wait without data before completing 101 * a read short 102 */ 103 int baud_rate; 104 int close_pending; 105 int lsr_event; 106 107 struct edgeport_serial *edge_serial; 108 struct usb_serial_port *port; 109 __u8 bUartMode; /* Port type, 0: RS232, etc. */ 110 spinlock_t ep_lock; 111 int ep_read_urb_state; 112 int ep_write_urb_in_use; 113}; 114 115struct edgeport_serial { 116 struct product_info product_info; 117 u8 TI_I2C_Type; /* Type of I2C in UMP */ 118 u8 TiReadI2C; /* 119 * Set to TRUE if we have read the 120 * I2c in Boot Mode 121 */ 122 struct mutex es_lock; 123 int num_ports_open; 124 struct usb_serial *serial; 125 struct delayed_work heartbeat_work; 126 int fw_version; 127 bool use_heartbeat; 128}; 129 130 131/* Devices that this driver supports */ 132static const struct usb_device_id edgeport_1port_id_table[] = { 133 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) }, 134 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) }, 135 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) }, 136 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) }, 137 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) }, 138 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) }, 139 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) }, 140 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) }, 141 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) }, 142 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) }, 143 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) }, 144 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) }, 145 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) }, 146 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) }, 147 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) }, 148 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) }, 149 { } 150}; 151 152static const struct usb_device_id edgeport_2port_id_table[] = { 153 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) }, 154 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) }, 155 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) }, 156 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) }, 157 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) }, 158 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) }, 159 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) }, 160 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) }, 161 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) }, 162 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) }, 163 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) }, 164 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) }, 165 /* The 4, 8 and 16 port devices show up as multiple 2 port devices */ 166 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) }, 167 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) }, 168 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) }, 169 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) }, 170 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) }, 171 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_E5805A) }, 172 { } 173}; 174 175/* Devices that this driver supports */ 176static const struct usb_device_id id_table_combined[] = { 177 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) }, 178 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) }, 179 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) }, 180 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) }, 181 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) }, 182 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) }, 183 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) }, 184 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) }, 185 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) }, 186 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) }, 187 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) }, 188 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) }, 189 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) }, 190 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) }, 191 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) }, 192 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) }, 193 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) }, 194 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) }, 195 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) }, 196 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) }, 197 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) }, 198 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) }, 199 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) }, 200 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) }, 201 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) }, 202 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) }, 203 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) }, 204 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) }, 205 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) }, 206 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) }, 207 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) }, 208 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) }, 209 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) }, 210 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_E5805A) }, 211 { } 212}; 213 214MODULE_DEVICE_TABLE(usb, id_table_combined); 215 216static int closing_wait = EDGE_CLOSING_WAIT; 217static bool ignore_cpu_rev; 218static int default_uart_mode; /* RS232 */ 219 220static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, 221 int length); 222 223static void stop_read(struct edgeport_port *edge_port); 224static int restart_read(struct edgeport_port *edge_port); 225 226static void edge_set_termios(struct tty_struct *tty, 227 struct usb_serial_port *port, struct ktermios *old_termios); 228static void edge_send(struct usb_serial_port *port, struct tty_struct *tty); 229 230static int do_download_mode(struct edgeport_serial *serial, 231 const struct firmware *fw); 232static int do_boot_mode(struct edgeport_serial *serial, 233 const struct firmware *fw); 234 235/* sysfs attributes */ 236static int edge_create_sysfs_attrs(struct usb_serial_port *port); 237static int edge_remove_sysfs_attrs(struct usb_serial_port *port); 238 239/* 240 * Some release of Edgeport firmware "down3.bin" after version 4.80 241 * introduced code to automatically disconnect idle devices on some 242 * Edgeport models after periods of inactivity, typically ~60 seconds. 243 * This occurs without regard to whether ports on the device are open 244 * or not. Digi International Tech Support suggested: 245 * 246 * 1. Adding driver "heartbeat" code to reset the firmware timer by 247 * requesting a descriptor record every 15 seconds, which should be 248 * effective with newer firmware versions that require it, and benign 249 * with older versions that do not. In practice 40 seconds seems often 250 * enough. 251 * 2. The heartbeat code is currently required only on Edgeport/416 models. 252 */ 253#define FW_HEARTBEAT_VERSION_CUTOFF ((4 << 8) + 80) 254#define FW_HEARTBEAT_SECS 40 255 256/* Timeouts in msecs: firmware downloads take longer */ 257#define TI_VSEND_TIMEOUT_DEFAULT 1000 258#define TI_VSEND_TIMEOUT_FW_DOWNLOAD 10000 259 260static int ti_vread_sync(struct usb_device *dev, __u8 request, 261 __u16 value, __u16 index, u8 *data, int size) 262{ 263 int status; 264 265 status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request, 266 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN), 267 value, index, data, size, 1000); 268 if (status < 0) 269 return status; 270 if (status != size) { 271 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n", 272 __func__, size, status); 273 return -ECOMM; 274 } 275 return 0; 276} 277 278static int ti_vsend_sync(struct usb_device *dev, u8 request, u16 value, 279 u16 index, u8 *data, int size, int timeout) 280{ 281 int status; 282 283 status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request, 284 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT), 285 value, index, data, size, timeout); 286 if (status < 0) 287 return status; 288 if (status != size) { 289 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n", 290 __func__, size, status); 291 return -ECOMM; 292 } 293 return 0; 294} 295 296static int send_cmd(struct usb_device *dev, __u8 command, 297 __u8 moduleid, __u16 value, u8 *data, 298 int size) 299{ 300 return ti_vsend_sync(dev, command, value, moduleid, data, size, 301 TI_VSEND_TIMEOUT_DEFAULT); 302} 303 304/* clear tx/rx buffers and fifo in TI UMP */ 305static int purge_port(struct usb_serial_port *port, __u16 mask) 306{ 307 int port_number = port->port_number; 308 309 dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask); 310 311 return send_cmd(port->serial->dev, 312 UMPC_PURGE_PORT, 313 (__u8)(UMPM_UART1_PORT + port_number), 314 mask, 315 NULL, 316 0); 317} 318 319/** 320 * read_download_mem - Read edgeport memory from TI chip 321 * @dev: usb device pointer 322 * @start_address: Device CPU address at which to read 323 * @length: Length of above data 324 * @address_type: Can read both XDATA and I2C 325 * @buffer: pointer to input data buffer 326 */ 327static int read_download_mem(struct usb_device *dev, int start_address, 328 int length, __u8 address_type, __u8 *buffer) 329{ 330 int status = 0; 331 __u8 read_length; 332 u16 be_start_address; 333 334 dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, length); 335 336 /* 337 * Read in blocks of 64 bytes 338 * (TI firmware can't handle more than 64 byte reads) 339 */ 340 while (length) { 341 if (length > 64) 342 read_length = 64; 343 else 344 read_length = (__u8)length; 345 346 if (read_length > 1) { 347 dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, read_length); 348 } 349 /* 350 * NOTE: Must use swab as wIndex is sent in little-endian 351 * byte order regardless of host byte order. 352 */ 353 be_start_address = swab16((u16)start_address); 354 status = ti_vread_sync(dev, UMPC_MEMORY_READ, 355 (__u16)address_type, 356 be_start_address, 357 buffer, read_length); 358 359 if (status) { 360 dev_dbg(&dev->dev, "%s - ERROR %x\n", __func__, status); 361 return status; 362 } 363 364 if (read_length > 1) 365 usb_serial_debug_data(&dev->dev, __func__, read_length, buffer); 366 367 /* Update pointers/length */ 368 start_address += read_length; 369 buffer += read_length; 370 length -= read_length; 371 } 372 373 return status; 374} 375 376static int read_ram(struct usb_device *dev, int start_address, 377 int length, __u8 *buffer) 378{ 379 return read_download_mem(dev, start_address, length, 380 DTK_ADDR_SPACE_XDATA, buffer); 381} 382 383/* Read edgeport memory to a given block */ 384static int read_boot_mem(struct edgeport_serial *serial, 385 int start_address, int length, __u8 *buffer) 386{ 387 int status = 0; 388 int i; 389 390 for (i = 0; i < length; i++) { 391 status = ti_vread_sync(serial->serial->dev, 392 UMPC_MEMORY_READ, serial->TI_I2C_Type, 393 (__u16)(start_address+i), &buffer[i], 0x01); 394 if (status) { 395 dev_dbg(&serial->serial->dev->dev, "%s - ERROR %x\n", __func__, status); 396 return status; 397 } 398 } 399 400 dev_dbg(&serial->serial->dev->dev, "%s - start_address = %x, length = %d\n", 401 __func__, start_address, length); 402 usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer); 403 404 serial->TiReadI2C = 1; 405 406 return status; 407} 408 409/* Write given block to TI EPROM memory */ 410static int write_boot_mem(struct edgeport_serial *serial, 411 int start_address, int length, __u8 *buffer) 412{ 413 int status = 0; 414 int i; 415 u8 *temp; 416 417 /* Must do a read before write */ 418 if (!serial->TiReadI2C) { 419 temp = kmalloc(1, GFP_KERNEL); 420 if (!temp) 421 return -ENOMEM; 422 423 status = read_boot_mem(serial, 0, 1, temp); 424 kfree(temp); 425 if (status) 426 return status; 427 } 428 429 for (i = 0; i < length; ++i) { 430 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE, 431 buffer[i], (u16)(i + start_address), NULL, 432 0, TI_VSEND_TIMEOUT_DEFAULT); 433 if (status) 434 return status; 435 } 436 437 dev_dbg(&serial->serial->dev->dev, "%s - start_sddr = %x, length = %d\n", __func__, start_address, length); 438 usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer); 439 440 return status; 441} 442 443/* Write edgeport I2C memory to TI chip */ 444static int write_i2c_mem(struct edgeport_serial *serial, 445 int start_address, int length, __u8 address_type, __u8 *buffer) 446{ 447 struct device *dev = &serial->serial->dev->dev; 448 int status = 0; 449 int write_length; 450 u16 be_start_address; 451 452 /* We can only send a maximum of 1 aligned byte page at a time */ 453 454 /* calculate 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 dev_dbg(dev, "%s - BytesInFirstPage Addr = %x, length = %d\n", 462 __func__, start_address, write_length); 463 usb_serial_debug_data(dev, __func__, write_length, buffer); 464 465 /* 466 * Write first page. 467 * 468 * NOTE: Must use swab as wIndex is sent in little-endian byte order 469 * regardless of host byte order. 470 */ 471 be_start_address = swab16((u16)start_address); 472 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE, 473 (u16)address_type, be_start_address, 474 buffer, write_length, TI_VSEND_TIMEOUT_DEFAULT); 475 if (status) { 476 dev_dbg(dev, "%s - ERROR %d\n", __func__, status); 477 return status; 478 } 479 480 length -= write_length; 481 start_address += write_length; 482 buffer += write_length; 483 484 /* 485 * We should be aligned now -- can write max page size bytes at a 486 * time. 487 */ 488 while (length) { 489 if (length > EPROM_PAGE_SIZE) 490 write_length = EPROM_PAGE_SIZE; 491 else 492 write_length = length; 493 494 dev_dbg(dev, "%s - Page Write Addr = %x, length = %d\n", 495 __func__, start_address, write_length); 496 usb_serial_debug_data(dev, __func__, write_length, buffer); 497 498 /* 499 * Write next page. 500 * 501 * NOTE: Must use swab as wIndex is sent in little-endian byte 502 * order regardless of host byte order. 503 */ 504 be_start_address = swab16((u16)start_address); 505 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE, 506 (u16)address_type, be_start_address, buffer, 507 write_length, TI_VSEND_TIMEOUT_DEFAULT); 508 if (status) { 509 dev_err(dev, "%s - ERROR %d\n", __func__, status); 510 return status; 511 } 512 513 length -= write_length; 514 start_address += write_length; 515 buffer += write_length; 516 } 517 return status; 518} 519 520/* 521 * Examine the UMP DMA registers and LSR 522 * 523 * Check the MSBit of the X and Y DMA byte count registers. 524 * A zero in this bit indicates that the TX DMA buffers are empty 525 * then check the TX Empty bit in the UART. 526 */ 527static int tx_active(struct edgeport_port *port) 528{ 529 int status; 530 struct out_endpoint_desc_block *oedb; 531 __u8 *lsr; 532 int bytes_left = 0; 533 534 oedb = kmalloc(sizeof(*oedb), GFP_KERNEL); 535 if (!oedb) 536 return -ENOMEM; 537 538 /* 539 * Sigh, that's right, just one byte, as not all platforms can 540 * do DMA from stack 541 */ 542 lsr = kmalloc(1, GFP_KERNEL); 543 if (!lsr) { 544 kfree(oedb); 545 return -ENOMEM; 546 } 547 /* Read the DMA Count Registers */ 548 status = read_ram(port->port->serial->dev, port->dma_address, 549 sizeof(*oedb), (void *)oedb); 550 if (status) 551 goto exit_is_tx_active; 552 553 dev_dbg(&port->port->dev, "%s - XByteCount 0x%X\n", __func__, oedb->XByteCount); 554 555 /* and the LSR */ 556 status = read_ram(port->port->serial->dev, 557 port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr); 558 559 if (status) 560 goto exit_is_tx_active; 561 dev_dbg(&port->port->dev, "%s - LSR = 0x%X\n", __func__, *lsr); 562 563 /* If either buffer has data or we are transmitting then return TRUE */ 564 if ((oedb->XByteCount & 0x80) != 0) 565 bytes_left += 64; 566 567 if ((*lsr & UMP_UART_LSR_TX_MASK) == 0) 568 bytes_left += 1; 569 570 /* We return Not Active if we get any kind of error */ 571exit_is_tx_active: 572 dev_dbg(&port->port->dev, "%s - return %d\n", __func__, bytes_left); 573 574 kfree(lsr); 575 kfree(oedb); 576 return bytes_left; 577} 578 579static int choose_config(struct usb_device *dev) 580{ 581 /* 582 * There may be multiple configurations on this device, in which case 583 * we would need to read and parse all of them to find out which one 584 * we want. However, we just support one config at this point, 585 * configuration # 1, which is Config Descriptor 0. 586 */ 587 588 dev_dbg(&dev->dev, "%s - Number of Interfaces = %d\n", 589 __func__, dev->config->desc.bNumInterfaces); 590 dev_dbg(&dev->dev, "%s - MAX Power = %d\n", 591 __func__, dev->config->desc.bMaxPower * 2); 592 593 if (dev->config->desc.bNumInterfaces != 1) { 594 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __func__); 595 return -ENODEV; 596 } 597 598 return 0; 599} 600 601static int read_rom(struct edgeport_serial *serial, 602 int start_address, int length, __u8 *buffer) 603{ 604 int status; 605 606 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) { 607 status = read_download_mem(serial->serial->dev, 608 start_address, 609 length, 610 serial->TI_I2C_Type, 611 buffer); 612 } else { 613 status = read_boot_mem(serial, start_address, length, 614 buffer); 615 } 616 return status; 617} 618 619static int write_rom(struct edgeport_serial *serial, int start_address, 620 int length, __u8 *buffer) 621{ 622 if (serial->product_info.TiMode == TI_MODE_BOOT) 623 return write_boot_mem(serial, start_address, length, 624 buffer); 625 626 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) 627 return write_i2c_mem(serial, start_address, length, 628 serial->TI_I2C_Type, buffer); 629 return -EINVAL; 630} 631 632/* Read a descriptor header from I2C based on type */ 633static int get_descriptor_addr(struct edgeport_serial *serial, 634 int desc_type, struct ti_i2c_desc *rom_desc) 635{ 636 int start_address; 637 int status; 638 639 /* Search for requested descriptor in I2C */ 640 start_address = 2; 641 do { 642 status = read_rom(serial, 643 start_address, 644 sizeof(struct ti_i2c_desc), 645 (__u8 *)rom_desc); 646 if (status) 647 return 0; 648 649 if (rom_desc->Type == desc_type) 650 return start_address; 651 652 start_address = start_address + sizeof(struct ti_i2c_desc) + 653 le16_to_cpu(rom_desc->Size); 654 655 } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type); 656 657 return 0; 658} 659 660/* Validate descriptor checksum */ 661static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer) 662{ 663 __u16 i; 664 __u8 cs = 0; 665 666 for (i = 0; i < le16_to_cpu(rom_desc->Size); i++) 667 cs = (__u8)(cs + buffer[i]); 668 669 if (cs != rom_desc->CheckSum) { 670 pr_debug("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs); 671 return -EINVAL; 672 } 673 return 0; 674} 675 676/* Make sure that the I2C image is good */ 677static int check_i2c_image(struct edgeport_serial *serial) 678{ 679 struct device *dev = &serial->serial->dev->dev; 680 int status = 0; 681 struct ti_i2c_desc *rom_desc; 682 int start_address = 2; 683 __u8 *buffer; 684 __u16 ttype; 685 686 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 687 if (!rom_desc) 688 return -ENOMEM; 689 690 buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL); 691 if (!buffer) { 692 kfree(rom_desc); 693 return -ENOMEM; 694 } 695 696 /* Read the first byte (Signature0) must be 0x52 or 0x10 */ 697 status = read_rom(serial, 0, 1, buffer); 698 if (status) 699 goto out; 700 701 if (*buffer != UMP5152 && *buffer != UMP3410) { 702 dev_err(dev, "%s - invalid buffer signature\n", __func__); 703 status = -ENODEV; 704 goto out; 705 } 706 707 do { 708 /* Validate the I2C */ 709 status = read_rom(serial, 710 start_address, 711 sizeof(struct ti_i2c_desc), 712 (__u8 *)rom_desc); 713 if (status) 714 break; 715 716 if ((start_address + sizeof(struct ti_i2c_desc) + 717 le16_to_cpu(rom_desc->Size)) > TI_MAX_I2C_SIZE) { 718 status = -ENODEV; 719 dev_dbg(dev, "%s - structure too big, erroring out.\n", __func__); 720 break; 721 } 722 723 dev_dbg(dev, "%s Type = 0x%x\n", __func__, rom_desc->Type); 724 725 /* Skip type 2 record */ 726 ttype = rom_desc->Type & 0x0f; 727 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC 728 && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) { 729 /* Read the descriptor data */ 730 status = read_rom(serial, start_address + 731 sizeof(struct ti_i2c_desc), 732 le16_to_cpu(rom_desc->Size), 733 buffer); 734 if (status) 735 break; 736 737 status = valid_csum(rom_desc, buffer); 738 if (status) 739 break; 740 } 741 start_address = start_address + sizeof(struct ti_i2c_desc) + 742 le16_to_cpu(rom_desc->Size); 743 744 } while ((rom_desc->Type != I2C_DESC_TYPE_ION) && 745 (start_address < TI_MAX_I2C_SIZE)); 746 747 if ((rom_desc->Type != I2C_DESC_TYPE_ION) || 748 (start_address > TI_MAX_I2C_SIZE)) 749 status = -ENODEV; 750 751out: 752 kfree(buffer); 753 kfree(rom_desc); 754 return status; 755} 756 757static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer) 758{ 759 int status; 760 int start_address; 761 struct ti_i2c_desc *rom_desc; 762 struct edge_ti_manuf_descriptor *desc; 763 struct device *dev = &serial->serial->dev->dev; 764 765 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 766 if (!rom_desc) 767 return -ENOMEM; 768 769 start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION, 770 rom_desc); 771 772 if (!start_address) { 773 dev_dbg(dev, "%s - Edge Descriptor not found in I2C\n", __func__); 774 status = -ENODEV; 775 goto exit; 776 } 777 778 /* Read the descriptor data */ 779 status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc), 780 le16_to_cpu(rom_desc->Size), buffer); 781 if (status) 782 goto exit; 783 784 status = valid_csum(rom_desc, buffer); 785 786 desc = (struct edge_ti_manuf_descriptor *)buffer; 787 dev_dbg(dev, "%s - IonConfig 0x%x\n", __func__, desc->IonConfig); 788 dev_dbg(dev, "%s - Version %d\n", __func__, desc->Version); 789 dev_dbg(dev, "%s - Cpu/Board 0x%x\n", __func__, desc->CpuRev_BoardRev); 790 dev_dbg(dev, "%s - NumPorts %d\n", __func__, desc->NumPorts); 791 dev_dbg(dev, "%s - NumVirtualPorts %d\n", __func__, desc->NumVirtualPorts); 792 dev_dbg(dev, "%s - TotalPorts %d\n", __func__, desc->TotalPorts); 793 794exit: 795 kfree(rom_desc); 796 return status; 797} 798 799/* Build firmware header used for firmware update */ 800static int build_i2c_fw_hdr(u8 *header, const struct firmware *fw) 801{ 802 __u8 *buffer; 803 int buffer_size; 804 int i; 805 __u8 cs = 0; 806 struct ti_i2c_desc *i2c_header; 807 struct ti_i2c_image_header *img_header; 808 struct ti_i2c_firmware_rec *firmware_rec; 809 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data; 810 811 /* 812 * In order to update the I2C firmware we must change the type 2 record 813 * to type 0xF2. This will force the UMP to come up in Boot Mode. 814 * Then while in boot mode, the driver will download the latest 815 * firmware (padded to 15.5k) into the UMP ram. And finally when the 816 * device comes back up in download mode the driver will cause the new 817 * firmware to be copied from the UMP Ram to I2C and the firmware will 818 * update the record type from 0xf2 to 0x02. 819 */ 820 821 /* 822 * Allocate a 15.5k buffer + 2 bytes for version number (Firmware 823 * Record) 824 */ 825 buffer_size = (((1024 * 16) - 512 ) + 826 sizeof(struct ti_i2c_firmware_rec)); 827 828 buffer = kmalloc(buffer_size, GFP_KERNEL); 829 if (!buffer) 830 return -ENOMEM; 831 832 /* Set entire image of 0xffs */ 833 memset(buffer, 0xff, buffer_size); 834 835 /* Copy version number into firmware record */ 836 firmware_rec = (struct ti_i2c_firmware_rec *)buffer; 837 838 firmware_rec->Ver_Major = fw_hdr->major_version; 839 firmware_rec->Ver_Minor = fw_hdr->minor_version; 840 841 /* Pointer to fw_down memory image */ 842 img_header = (struct ti_i2c_image_header *)&fw->data[4]; 843 844 memcpy(buffer + sizeof(struct ti_i2c_firmware_rec), 845 &fw->data[4 + sizeof(struct ti_i2c_image_header)], 846 le16_to_cpu(img_header->Length)); 847 848 for (i=0; i < buffer_size; i++) { 849 cs = (__u8)(cs + buffer[i]); 850 } 851 852 kfree(buffer); 853 854 /* Build new header */ 855 i2c_header = (struct ti_i2c_desc *)header; 856 firmware_rec = (struct ti_i2c_firmware_rec*)i2c_header->Data; 857 858 i2c_header->Type = I2C_DESC_TYPE_FIRMWARE_BLANK; 859 i2c_header->Size = cpu_to_le16(buffer_size); 860 i2c_header->CheckSum = cs; 861 firmware_rec->Ver_Major = fw_hdr->major_version; 862 firmware_rec->Ver_Minor = fw_hdr->minor_version; 863 864 return 0; 865} 866 867/* Try to figure out what type of I2c we have */ 868static int i2c_type_bootmode(struct edgeport_serial *serial) 869{ 870 struct device *dev = &serial->serial->dev->dev; 871 int status; 872 u8 *data; 873 874 data = kmalloc(1, GFP_KERNEL); 875 if (!data) 876 return -ENOMEM; 877 878 /* Try to read type 2 */ 879 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ, 880 DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01); 881 if (status) 882 dev_dbg(dev, "%s - read 2 status error = %d\n", __func__, status); 883 else 884 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data); 885 if ((!status) && (*data == UMP5152 || *data == UMP3410)) { 886 dev_dbg(dev, "%s - ROM_TYPE_II\n", __func__); 887 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 888 goto out; 889 } 890 891 /* Try to read type 3 */ 892 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ, 893 DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01); 894 if (status) 895 dev_dbg(dev, "%s - read 3 status error = %d\n", __func__, status); 896 else 897 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data); 898 if ((!status) && (*data == UMP5152 || *data == UMP3410)) { 899 dev_dbg(dev, "%s - ROM_TYPE_III\n", __func__); 900 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III; 901 goto out; 902 } 903 904 dev_dbg(dev, "%s - Unknown\n", __func__); 905 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 906 status = -ENODEV; 907out: 908 kfree(data); 909 return status; 910} 911 912static int bulk_xfer(struct usb_serial *serial, void *buffer, 913 int length, int *num_sent) 914{ 915 int status; 916 917 status = usb_bulk_msg(serial->dev, 918 usb_sndbulkpipe(serial->dev, 919 serial->port[0]->bulk_out_endpointAddress), 920 buffer, length, num_sent, 1000); 921 return status; 922} 923 924/* Download given firmware image to the device (IN BOOT MODE) */ 925static int download_code(struct edgeport_serial *serial, __u8 *image, 926 int image_length) 927{ 928 int status = 0; 929 int pos; 930 int transfer; 931 int done; 932 933 /* Transfer firmware image */ 934 for (pos = 0; pos < image_length; ) { 935 /* Read the next buffer from file */ 936 transfer = image_length - pos; 937 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE) 938 transfer = EDGE_FW_BULK_MAX_PACKET_SIZE; 939 940 /* Transfer data */ 941 status = bulk_xfer(serial->serial, &image[pos], 942 transfer, &done); 943 if (status) 944 break; 945 /* Advance buffer pointer */ 946 pos += done; 947 } 948 949 return status; 950} 951 952/* FIXME!!! */ 953static int config_boot_dev(struct usb_device *dev) 954{ 955 return 0; 956} 957 958static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc) 959{ 960 return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev); 961} 962 963static int check_fw_sanity(struct edgeport_serial *serial, 964 const struct firmware *fw) 965{ 966 u16 length_total; 967 u8 checksum = 0; 968 int pos; 969 struct device *dev = &serial->serial->interface->dev; 970 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data; 971 972 if (fw->size < sizeof(struct edgeport_fw_hdr)) { 973 dev_err(dev, "incomplete fw header\n"); 974 return -EINVAL; 975 } 976 977 length_total = le16_to_cpu(fw_hdr->length) + 978 sizeof(struct edgeport_fw_hdr); 979 980 if (fw->size != length_total) { 981 dev_err(dev, "bad fw size (expected: %u, got: %zu)\n", 982 length_total, fw->size); 983 return -EINVAL; 984 } 985 986 for (pos = sizeof(struct edgeport_fw_hdr); pos < fw->size; ++pos) 987 checksum += fw->data[pos]; 988 989 if (checksum != fw_hdr->checksum) { 990 dev_err(dev, "bad fw checksum (expected: 0x%x, got: 0x%x)\n", 991 fw_hdr->checksum, checksum); 992 return -EINVAL; 993 } 994 995 return 0; 996} 997 998/* 999 * DownloadTIFirmware - Download run-time operating firmware to the TI5052 1000 * 1001 * This routine downloads the main operating code into the TI5052, using the 1002 * boot code already burned into E2PROM or ROM. 1003 */ 1004static int download_fw(struct edgeport_serial *serial) 1005{ 1006 struct device *dev = &serial->serial->interface->dev; 1007 int status = 0; 1008 struct usb_interface_descriptor *interface; 1009 const struct firmware *fw; 1010 const char *fw_name = "edgeport/down3.bin"; 1011 struct edgeport_fw_hdr *fw_hdr; 1012 1013 status = request_firmware(&fw, fw_name, dev); 1014 if (status) { 1015 dev_err(dev, "Failed to load image \"%s\" err %d\n", 1016 fw_name, status); 1017 return status; 1018 } 1019 1020 if (check_fw_sanity(serial, fw)) { 1021 status = -EINVAL; 1022 goto out; 1023 } 1024 1025 fw_hdr = (struct edgeport_fw_hdr *)fw->data; 1026 1027 /* If on-board version is newer, "fw_version" will be updated later. */ 1028 serial->fw_version = (fw_hdr->major_version << 8) + 1029 fw_hdr->minor_version; 1030 1031 /* 1032 * This routine is entered by both the BOOT mode and the Download mode 1033 * We can determine which code is running by the reading the config 1034 * descriptor and if we have only one bulk pipe it is in boot mode 1035 */ 1036 serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP; 1037 1038 /* Default to type 2 i2c */ 1039 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 1040 1041 status = choose_config(serial->serial->dev); 1042 if (status) 1043 goto out; 1044 1045 interface = &serial->serial->interface->cur_altsetting->desc; 1046 if (!interface) { 1047 dev_err(dev, "%s - no interface set, error!\n", __func__); 1048 status = -ENODEV; 1049 goto out; 1050 } 1051 1052 /* 1053 * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING 1054 * if we have more than one endpoint we are definitely in download 1055 * mode 1056 */ 1057 if (interface->bNumEndpoints > 1) { 1058 serial->product_info.TiMode = TI_MODE_DOWNLOAD; 1059 status = do_download_mode(serial, fw); 1060 } else { 1061 /* Otherwise we will remain in configuring mode */ 1062 serial->product_info.TiMode = TI_MODE_CONFIGURING; 1063 status = do_boot_mode(serial, fw); 1064 } 1065 1066out: 1067 release_firmware(fw); 1068 return status; 1069} 1070 1071static int do_download_mode(struct edgeport_serial *serial, 1072 const struct firmware *fw) 1073{ 1074 struct device *dev = &serial->serial->interface->dev; 1075 int status = 0; 1076 int start_address; 1077 struct edge_ti_manuf_descriptor *ti_manuf_desc; 1078 int download_cur_ver; 1079 int download_new_ver; 1080 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data; 1081 struct ti_i2c_desc *rom_desc; 1082 1083 dev_dbg(dev, "%s - RUNNING IN DOWNLOAD MODE\n", __func__); 1084 1085 status = check_i2c_image(serial); 1086 if (status) { 1087 dev_dbg(dev, "%s - DOWNLOAD MODE -- BAD I2C\n", __func__); 1088 return status; 1089 } 1090 1091 /* 1092 * Validate Hardware version number 1093 * Read Manufacturing Descriptor from TI Based Edgeport 1094 */ 1095 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL); 1096 if (!ti_manuf_desc) 1097 return -ENOMEM; 1098 1099 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc); 1100 if (status) { 1101 kfree(ti_manuf_desc); 1102 return status; 1103 } 1104 1105 /* Check version number of ION descriptor */ 1106 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) { 1107 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n", 1108 __func__, ti_cpu_rev(ti_manuf_desc)); 1109 kfree(ti_manuf_desc); 1110 return -EINVAL; 1111 } 1112 1113 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 1114 if (!rom_desc) { 1115 kfree(ti_manuf_desc); 1116 return -ENOMEM; 1117 } 1118 1119 /* Search for type 2 record (firmware record) */ 1120 start_address = get_descriptor_addr(serial, 1121 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc); 1122 if (start_address != 0) { 1123 struct ti_i2c_firmware_rec *firmware_version; 1124 u8 *record; 1125 1126 dev_dbg(dev, "%s - Found Type FIRMWARE (Type 2) record\n", 1127 __func__); 1128 1129 firmware_version = kmalloc(sizeof(*firmware_version), 1130 GFP_KERNEL); 1131 if (!firmware_version) { 1132 kfree(rom_desc); 1133 kfree(ti_manuf_desc); 1134 return -ENOMEM; 1135 } 1136 1137 /* 1138 * Validate version number 1139 * Read the descriptor data 1140 */ 1141 status = read_rom(serial, start_address + 1142 sizeof(struct ti_i2c_desc), 1143 sizeof(struct ti_i2c_firmware_rec), 1144 (__u8 *)firmware_version); 1145 if (status) { 1146 kfree(firmware_version); 1147 kfree(rom_desc); 1148 kfree(ti_manuf_desc); 1149 return status; 1150 } 1151 1152 /* 1153 * Check version number of download with current 1154 * version in I2c 1155 */ 1156 download_cur_ver = (firmware_version->Ver_Major << 8) + 1157 (firmware_version->Ver_Minor); 1158 download_new_ver = (fw_hdr->major_version << 8) + 1159 (fw_hdr->minor_version); 1160 1161 dev_dbg(dev, "%s - >> FW Versions Device %d.%d Driver %d.%d\n", 1162 __func__, firmware_version->Ver_Major, 1163 firmware_version->Ver_Minor, 1164 fw_hdr->major_version, fw_hdr->minor_version); 1165 1166 /* 1167 * Check if we have an old version in the I2C and 1168 * update if necessary 1169 */ 1170 if (download_cur_ver < download_new_ver) { 1171 dev_dbg(dev, "%s - Update I2C dld from %d.%d to %d.%d\n", 1172 __func__, 1173 firmware_version->Ver_Major, 1174 firmware_version->Ver_Minor, 1175 fw_hdr->major_version, 1176 fw_hdr->minor_version); 1177 1178 record = kmalloc(1, GFP_KERNEL); 1179 if (!record) { 1180 kfree(firmware_version); 1181 kfree(rom_desc); 1182 kfree(ti_manuf_desc); 1183 return -ENOMEM; 1184 } 1185 /* 1186 * In order to update the I2C firmware we must 1187 * change the type 2 record to type 0xF2. This 1188 * will force the UMP to come up in Boot Mode. 1189 * Then while in boot mode, the driver will 1190 * download the latest firmware (padded to 1191 * 15.5k) into the UMP ram. Finally when the 1192 * device comes back up in download mode the 1193 * driver will cause the new firmware to be 1194 * copied from the UMP Ram to I2C and the 1195 * firmware will update the record type from 1196 * 0xf2 to 0x02. 1197 */ 1198 *record = I2C_DESC_TYPE_FIRMWARE_BLANK; 1199 1200 /* 1201 * Change the I2C Firmware record type to 1202 * 0xf2 to trigger an update 1203 */ 1204 status = write_rom(serial, start_address, 1205 sizeof(*record), record); 1206 if (status) { 1207 kfree(record); 1208 kfree(firmware_version); 1209 kfree(rom_desc); 1210 kfree(ti_manuf_desc); 1211 return status; 1212 } 1213 1214 /* 1215 * verify the write -- must do this in order 1216 * for write to complete before we do the 1217 * hardware reset 1218 */ 1219 status = read_rom(serial, 1220 start_address, 1221 sizeof(*record), 1222 record); 1223 if (status) { 1224 kfree(record); 1225 kfree(firmware_version); 1226 kfree(rom_desc); 1227 kfree(ti_manuf_desc); 1228 return status; 1229 } 1230 1231 if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) { 1232 dev_err(dev, "%s - error resetting device\n", 1233 __func__); 1234 kfree(record); 1235 kfree(firmware_version); 1236 kfree(rom_desc); 1237 kfree(ti_manuf_desc); 1238 return -ENODEV; 1239 } 1240 1241 dev_dbg(dev, "%s - HARDWARE RESET\n", __func__); 1242 1243 /* Reset UMP -- Back to BOOT MODE */ 1244 status = ti_vsend_sync(serial->serial->dev, 1245 UMPC_HARDWARE_RESET, 1246 0, 0, NULL, 0, 1247 TI_VSEND_TIMEOUT_DEFAULT); 1248 1249 dev_dbg(dev, "%s - HARDWARE RESET return %d\n", 1250 __func__, status); 1251 1252 /* return an error on purpose. */ 1253 kfree(record); 1254 kfree(firmware_version); 1255 kfree(rom_desc); 1256 kfree(ti_manuf_desc); 1257 return -ENODEV; 1258 } 1259 /* Same or newer fw version is already loaded */ 1260 serial->fw_version = download_cur_ver; 1261 kfree(firmware_version); 1262 } 1263 /* Search for type 0xF2 record (firmware blank record) */ 1264 else { 1265 start_address = get_descriptor_addr(serial, 1266 I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc); 1267 if (start_address != 0) { 1268#define HEADER_SIZE (sizeof(struct ti_i2c_desc) + \ 1269 sizeof(struct ti_i2c_firmware_rec)) 1270 __u8 *header; 1271 __u8 *vheader; 1272 1273 header = kmalloc(HEADER_SIZE, GFP_KERNEL); 1274 if (!header) { 1275 kfree(rom_desc); 1276 kfree(ti_manuf_desc); 1277 return -ENOMEM; 1278 } 1279 1280 vheader = kmalloc(HEADER_SIZE, GFP_KERNEL); 1281 if (!vheader) { 1282 kfree(header); 1283 kfree(rom_desc); 1284 kfree(ti_manuf_desc); 1285 return -ENOMEM; 1286 } 1287 1288 dev_dbg(dev, "%s - Found Type BLANK FIRMWARE (Type F2) record\n", 1289 __func__); 1290 1291 /* 1292 * In order to update the I2C firmware we must change 1293 * the type 2 record to type 0xF2. This will force the 1294 * UMP to come up in Boot Mode. Then while in boot 1295 * mode, the driver will download the latest firmware 1296 * (padded to 15.5k) into the UMP ram. Finally when the 1297 * device comes back up in download mode the driver 1298 * will cause the new firmware to be copied from the 1299 * UMP Ram to I2C and the firmware will update the 1300 * record type from 0xf2 to 0x02. 1301 */ 1302 status = build_i2c_fw_hdr(header, fw); 1303 if (status) { 1304 kfree(vheader); 1305 kfree(header); 1306 kfree(rom_desc); 1307 kfree(ti_manuf_desc); 1308 return -EINVAL; 1309 } 1310 1311 /* 1312 * Update I2C with type 0xf2 record with correct 1313 * size and checksum 1314 */ 1315 status = write_rom(serial, 1316 start_address, 1317 HEADER_SIZE, 1318 header); 1319 if (status) { 1320 kfree(vheader); 1321 kfree(header); 1322 kfree(rom_desc); 1323 kfree(ti_manuf_desc); 1324 return -EINVAL; 1325 } 1326 1327 /* 1328 * verify the write -- must do this in order for 1329 * write to complete before we do the hardware reset 1330 */ 1331 status = read_rom(serial, start_address, 1332 HEADER_SIZE, vheader); 1333 1334 if (status) { 1335 dev_dbg(dev, "%s - can't read header back\n", 1336 __func__); 1337 kfree(vheader); 1338 kfree(header); 1339 kfree(rom_desc); 1340 kfree(ti_manuf_desc); 1341 return status; 1342 } 1343 if (memcmp(vheader, header, HEADER_SIZE)) { 1344 dev_dbg(dev, "%s - write download record failed\n", 1345 __func__); 1346 kfree(vheader); 1347 kfree(header); 1348 kfree(rom_desc); 1349 kfree(ti_manuf_desc); 1350 return -EINVAL; 1351 } 1352 1353 kfree(vheader); 1354 kfree(header); 1355 1356 dev_dbg(dev, "%s - Start firmware update\n", __func__); 1357 1358 /* Tell firmware to copy download image into I2C */ 1359 status = ti_vsend_sync(serial->serial->dev, 1360 UMPC_COPY_DNLD_TO_I2C, 1361 0, 0, NULL, 0, 1362 TI_VSEND_TIMEOUT_FW_DOWNLOAD); 1363 1364 dev_dbg(dev, "%s - Update complete 0x%x\n", __func__, 1365 status); 1366 if (status) { 1367 dev_err(dev, 1368 "%s - UMPC_COPY_DNLD_TO_I2C failed\n", 1369 __func__); 1370 kfree(rom_desc); 1371 kfree(ti_manuf_desc); 1372 return status; 1373 } 1374 } 1375 } 1376 1377 /* The device is running the download code */ 1378 kfree(rom_desc); 1379 kfree(ti_manuf_desc); 1380 return 0; 1381} 1382 1383static int do_boot_mode(struct edgeport_serial *serial, 1384 const struct firmware *fw) 1385{ 1386 struct device *dev = &serial->serial->interface->dev; 1387 int status = 0; 1388 struct edge_ti_manuf_descriptor *ti_manuf_desc; 1389 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data; 1390 1391 dev_dbg(dev, "%s - RUNNING IN BOOT MODE\n", __func__); 1392 1393 /* Configure the TI device so we can use the BULK pipes for download */ 1394 status = config_boot_dev(serial->serial->dev); 1395 if (status) 1396 return status; 1397 1398 if (le16_to_cpu(serial->serial->dev->descriptor.idVendor) 1399 != USB_VENDOR_ID_ION) { 1400 dev_dbg(dev, "%s - VID = 0x%x\n", __func__, 1401 le16_to_cpu(serial->serial->dev->descriptor.idVendor)); 1402 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 1403 goto stayinbootmode; 1404 } 1405 1406 /* 1407 * We have an ION device (I2c Must be programmed) 1408 * Determine I2C image type 1409 */ 1410 if (i2c_type_bootmode(serial)) 1411 goto stayinbootmode; 1412 1413 /* Check for ION Vendor ID and that the I2C is valid */ 1414 if (!check_i2c_image(serial)) { 1415 struct ti_i2c_image_header *header; 1416 int i; 1417 __u8 cs = 0; 1418 __u8 *buffer; 1419 int buffer_size; 1420 1421 /* 1422 * Validate Hardware version number 1423 * Read Manufacturing Descriptor from TI Based Edgeport 1424 */ 1425 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL); 1426 if (!ti_manuf_desc) 1427 return -ENOMEM; 1428 1429 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc); 1430 if (status) { 1431 kfree(ti_manuf_desc); 1432 goto stayinbootmode; 1433 } 1434 1435 /* Check for version 2 */ 1436 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) { 1437 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n", 1438 __func__, ti_cpu_rev(ti_manuf_desc)); 1439 kfree(ti_manuf_desc); 1440 goto stayinbootmode; 1441 } 1442 1443 kfree(ti_manuf_desc); 1444 1445 /* 1446 * In order to update the I2C firmware we must change the type 1447 * 2 record to type 0xF2. This will force the UMP to come up 1448 * in Boot Mode. Then while in boot mode, the driver will 1449 * download the latest firmware (padded to 15.5k) into the 1450 * UMP ram. Finally when the device comes back up in download 1451 * mode the driver will cause the new firmware to be copied 1452 * from the UMP Ram to I2C and the firmware will update the 1453 * record type from 0xf2 to 0x02. 1454 * 1455 * Do we really have to copy the whole firmware image, 1456 * or could we do this in place! 1457 */ 1458 1459 /* Allocate a 15.5k buffer + 3 byte header */ 1460 buffer_size = (((1024 * 16) - 512) + 1461 sizeof(struct ti_i2c_image_header)); 1462 buffer = kmalloc(buffer_size, GFP_KERNEL); 1463 if (!buffer) 1464 return -ENOMEM; 1465 1466 /* Initialize the buffer to 0xff (pad the buffer) */ 1467 memset(buffer, 0xff, buffer_size); 1468 memcpy(buffer, &fw->data[4], fw->size - 4); 1469 1470 for (i = sizeof(struct ti_i2c_image_header); 1471 i < buffer_size; i++) { 1472 cs = (__u8)(cs + buffer[i]); 1473 } 1474 1475 header = (struct ti_i2c_image_header *)buffer; 1476 1477 /* update length and checksum after padding */ 1478 header->Length = cpu_to_le16((__u16)(buffer_size - 1479 sizeof(struct ti_i2c_image_header))); 1480 header->CheckSum = cs; 1481 1482 /* Download the operational code */ 1483 dev_dbg(dev, "%s - Downloading operational code image version %d.%d (TI UMP)\n", 1484 __func__, 1485 fw_hdr->major_version, fw_hdr->minor_version); 1486 status = download_code(serial, buffer, buffer_size); 1487 1488 kfree(buffer); 1489 1490 if (status) { 1491 dev_dbg(dev, "%s - Error downloading operational code image\n", __func__); 1492 return status; 1493 } 1494 1495 /* Device will reboot */ 1496 serial->product_info.TiMode = TI_MODE_TRANSITIONING; 1497 1498 dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__); 1499 1500 return 1; 1501 } 1502 1503stayinbootmode: 1504 /* Eprom is invalid or blank stay in boot mode */ 1505 dev_dbg(dev, "%s - STAYING IN BOOT MODE\n", __func__); 1506 serial->product_info.TiMode = TI_MODE_BOOT; 1507 1508 return 1; 1509} 1510 1511static int ti_do_config(struct edgeport_port *port, int feature, int on) 1512{ 1513 int port_number = port->port->port_number; 1514 1515 on = !!on; /* 1 or 0 not bitmask */ 1516 return send_cmd(port->port->serial->dev, 1517 feature, (__u8)(UMPM_UART1_PORT + port_number), 1518 on, NULL, 0); 1519} 1520 1521static int restore_mcr(struct edgeport_port *port, __u8 mcr) 1522{ 1523 int status = 0; 1524 1525 dev_dbg(&port->port->dev, "%s - %x\n", __func__, mcr); 1526 1527 status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR); 1528 if (status) 1529 return status; 1530 status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS); 1531 if (status) 1532 return status; 1533 return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK); 1534} 1535 1536/* Convert TI LSR to standard UART flags */ 1537static __u8 map_line_status(__u8 ti_lsr) 1538{ 1539 __u8 lsr = 0; 1540 1541#define MAP_FLAG(flagUmp, flagUart) \ 1542 if (ti_lsr & flagUmp) \ 1543 lsr |= flagUart; 1544 1545 MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR) /* overrun */ 1546 MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR) /* parity error */ 1547 MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR) /* framing error */ 1548 MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK) /* break detected */ 1549 MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL) /* rx data available */ 1550 MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY) /* tx hold reg empty */ 1551 1552#undef MAP_FLAG 1553 1554 return lsr; 1555} 1556 1557static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr) 1558{ 1559 struct async_icount *icount; 1560 struct tty_struct *tty; 1561 1562 dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, msr); 1563 1564 if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | 1565 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 1566 icount = &edge_port->port->icount; 1567 1568 /* update input line counters */ 1569 if (msr & EDGEPORT_MSR_DELTA_CTS) 1570 icount->cts++; 1571 if (msr & EDGEPORT_MSR_DELTA_DSR) 1572 icount->dsr++; 1573 if (msr & EDGEPORT_MSR_DELTA_CD) 1574 icount->dcd++; 1575 if (msr & EDGEPORT_MSR_DELTA_RI) 1576 icount->rng++; 1577 wake_up_interruptible(&edge_port->port->port.delta_msr_wait); 1578 } 1579 1580 /* Save the new modem status */ 1581 edge_port->shadow_msr = msr & 0xf0; 1582 1583 tty = tty_port_tty_get(&edge_port->port->port); 1584 /* handle CTS flow control */ 1585 if (tty && C_CRTSCTS(tty)) { 1586 if (msr & EDGEPORT_MSR_CTS) 1587 tty_wakeup(tty); 1588 } 1589 tty_kref_put(tty); 1590} 1591 1592static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data, 1593 __u8 lsr, __u8 data) 1594{ 1595 struct async_icount *icount; 1596 __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | 1597 LSR_FRM_ERR | LSR_BREAK)); 1598 1599 dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr); 1600 1601 edge_port->shadow_lsr = lsr; 1602 1603 if (new_lsr & LSR_BREAK) 1604 /* 1605 * Parity and Framing errors only count if they 1606 * occur exclusive of a break being received. 1607 */ 1608 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 1609 1610 /* Place LSR data byte into Rx buffer */ 1611 if (lsr_data) 1612 edge_tty_recv(edge_port->port, &data, 1); 1613 1614 /* update input line counters */ 1615 icount = &edge_port->port->icount; 1616 if (new_lsr & LSR_BREAK) 1617 icount->brk++; 1618 if (new_lsr & LSR_OVER_ERR) 1619 icount->overrun++; 1620 if (new_lsr & LSR_PAR_ERR) 1621 icount->parity++; 1622 if (new_lsr & LSR_FRM_ERR) 1623 icount->frame++; 1624} 1625 1626static void edge_interrupt_callback(struct urb *urb) 1627{ 1628 struct edgeport_serial *edge_serial = urb->context; 1629 struct usb_serial_port *port; 1630 struct edgeport_port *edge_port; 1631 struct device *dev; 1632 unsigned char *data = urb->transfer_buffer; 1633 int length = urb->actual_length; 1634 int port_number; 1635 int function; 1636 int retval; 1637 __u8 lsr; 1638 __u8 msr; 1639 int status = urb->status; 1640 1641 switch (status) { 1642 case 0: 1643 /* success */ 1644 break; 1645 case -ECONNRESET: 1646 case -ENOENT: 1647 case -ESHUTDOWN: 1648 /* this urb is terminated, clean up */ 1649 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 1650 __func__, status); 1651 return; 1652 default: 1653 dev_err(&urb->dev->dev, "%s - nonzero urb status received: " 1654 "%d\n", __func__, status); 1655 goto exit; 1656 } 1657 1658 if (!length) { 1659 dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__); 1660 goto exit; 1661 } 1662 1663 dev = &edge_serial->serial->dev->dev; 1664 usb_serial_debug_data(dev, __func__, length, data); 1665 1666 if (length != 2) { 1667 dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length); 1668 goto exit; 1669 } 1670 1671 port_number = TIUMP_GET_PORT_FROM_CODE(data[0]); 1672 function = TIUMP_GET_FUNC_FROM_CODE(data[0]); 1673 dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__, 1674 port_number, function, data[1]); 1675 1676 if (port_number >= edge_serial->serial->num_ports) { 1677 dev_err(dev, "bad port number %d\n", port_number); 1678 goto exit; 1679 } 1680 1681 port = edge_serial->serial->port[port_number]; 1682 edge_port = usb_get_serial_port_data(port); 1683 if (!edge_port) { 1684 dev_dbg(dev, "%s - edge_port not found\n", __func__); 1685 return; 1686 } 1687 switch (function) { 1688 case TIUMP_INTERRUPT_CODE_LSR: 1689 lsr = map_line_status(data[1]); 1690 if (lsr & UMP_UART_LSR_DATA_MASK) { 1691 /* 1692 * Save the LSR event for bulk read completion routine 1693 */ 1694 dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n", 1695 __func__, port_number, lsr); 1696 edge_port->lsr_event = 1; 1697 edge_port->lsr_mask = lsr; 1698 } else { 1699 dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n", 1700 __func__, port_number, lsr); 1701 handle_new_lsr(edge_port, 0, lsr, 0); 1702 } 1703 break; 1704 1705 case TIUMP_INTERRUPT_CODE_MSR: /* MSR */ 1706 /* Copy MSR from UMP */ 1707 msr = data[1]; 1708 dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n", 1709 __func__, port_number, msr); 1710 handle_new_msr(edge_port, msr); 1711 break; 1712 1713 default: 1714 dev_err(&urb->dev->dev, 1715 "%s - Unknown Interrupt code from UMP %x\n", 1716 __func__, data[1]); 1717 break; 1718 1719 } 1720 1721exit: 1722 retval = usb_submit_urb(urb, GFP_ATOMIC); 1723 if (retval) 1724 dev_err(&urb->dev->dev, 1725 "%s - usb_submit_urb failed with result %d\n", 1726 __func__, retval); 1727} 1728 1729static void edge_bulk_in_callback(struct urb *urb) 1730{ 1731 struct edgeport_port *edge_port = urb->context; 1732 struct device *dev = &edge_port->port->dev; 1733 unsigned char *data = urb->transfer_buffer; 1734 unsigned long flags; 1735 int retval = 0; 1736 int port_number; 1737 int status = urb->status; 1738 1739 switch (status) { 1740 case 0: 1741 /* success */ 1742 break; 1743 case -ECONNRESET: 1744 case -ENOENT: 1745 case -ESHUTDOWN: 1746 /* this urb is terminated, clean up */ 1747 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status); 1748 return; 1749 default: 1750 dev_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status); 1751 } 1752 1753 if (status == -EPIPE) 1754 goto exit; 1755 1756 if (status) { 1757 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__); 1758 return; 1759 } 1760 1761 port_number = edge_port->port->port_number; 1762 1763 if (urb->actual_length > 0 && edge_port->lsr_event) { 1764 edge_port->lsr_event = 0; 1765 dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n", 1766 __func__, port_number, edge_port->lsr_mask, *data); 1767 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data); 1768 /* Adjust buffer length/pointer */ 1769 --urb->actual_length; 1770 ++data; 1771 } 1772 1773 if (urb->actual_length) { 1774 usb_serial_debug_data(dev, __func__, urb->actual_length, data); 1775 if (edge_port->close_pending) 1776 dev_dbg(dev, "%s - close pending, dropping data on the floor\n", 1777 __func__); 1778 else 1779 edge_tty_recv(edge_port->port, data, 1780 urb->actual_length); 1781 edge_port->port->icount.rx += urb->actual_length; 1782 } 1783 1784exit: 1785 /* continue read unless stopped */ 1786 spin_lock_irqsave(&edge_port->ep_lock, flags); 1787 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) 1788 retval = usb_submit_urb(urb, GFP_ATOMIC); 1789 else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) 1790 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED; 1791 1792 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1793 if (retval) 1794 dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval); 1795} 1796 1797static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, 1798 int length) 1799{ 1800 int queued; 1801 1802 queued = tty_insert_flip_string(&port->port, data, length); 1803 if (queued < length) 1804 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n", 1805 __func__, length - queued); 1806 tty_flip_buffer_push(&port->port); 1807} 1808 1809static void edge_bulk_out_callback(struct urb *urb) 1810{ 1811 struct usb_serial_port *port = urb->context; 1812 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1813 int status = urb->status; 1814 struct tty_struct *tty; 1815 1816 edge_port->ep_write_urb_in_use = 0; 1817 1818 switch (status) { 1819 case 0: 1820 /* success */ 1821 break; 1822 case -ECONNRESET: 1823 case -ENOENT: 1824 case -ESHUTDOWN: 1825 /* this urb is terminated, clean up */ 1826 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 1827 __func__, status); 1828 return; 1829 default: 1830 dev_err_console(port, "%s - nonzero write bulk status " 1831 "received: %d\n", __func__, status); 1832 } 1833 1834 /* send any buffered data */ 1835 tty = tty_port_tty_get(&port->port); 1836 edge_send(port, tty); 1837 tty_kref_put(tty); 1838} 1839 1840static int edge_open(struct tty_struct *tty, struct usb_serial_port *port) 1841{ 1842 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1843 struct edgeport_serial *edge_serial; 1844 struct usb_device *dev; 1845 struct urb *urb; 1846 int port_number; 1847 int status; 1848 u16 open_settings; 1849 u8 transaction_timeout; 1850 1851 if (edge_port == NULL) 1852 return -ENODEV; 1853 1854 port_number = port->port_number; 1855 1856 dev = port->serial->dev; 1857 1858 /* turn off loopback */ 1859 status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0); 1860 if (status) { 1861 dev_err(&port->dev, 1862 "%s - cannot send clear loopback command, %d\n", 1863 __func__, status); 1864 return status; 1865 } 1866 1867 /* set up the port settings */ 1868 if (tty) 1869 edge_set_termios(tty, port, &tty->termios); 1870 1871 /* open up the port */ 1872 1873 /* milliseconds to timeout for DMA transfer */ 1874 transaction_timeout = 2; 1875 1876 edge_port->ump_read_timeout = 1877 max(20, ((transaction_timeout * 3) / 2)); 1878 1879 /* milliseconds to timeout for DMA transfer */ 1880 open_settings = (u8)(UMP_DMA_MODE_CONTINOUS | 1881 UMP_PIPE_TRANS_TIMEOUT_ENA | 1882 (transaction_timeout << 2)); 1883 1884 dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__); 1885 1886 /* Tell TI to open and start the port */ 1887 status = send_cmd(dev, UMPC_OPEN_PORT, 1888 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0); 1889 if (status) { 1890 dev_err(&port->dev, "%s - cannot send open command, %d\n", 1891 __func__, status); 1892 return status; 1893 } 1894 1895 /* Start the DMA? */ 1896 status = send_cmd(dev, UMPC_START_PORT, 1897 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0); 1898 if (status) { 1899 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n", 1900 __func__, status); 1901 return status; 1902 } 1903 1904 /* Clear TX and RX buffers in UMP */ 1905 status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN); 1906 if (status) { 1907 dev_err(&port->dev, 1908 "%s - cannot send clear buffers command, %d\n", 1909 __func__, status); 1910 return status; 1911 } 1912 1913 /* Read Initial MSR */ 1914 status = ti_vread_sync(dev, UMPC_READ_MSR, 0, 1915 (__u16)(UMPM_UART1_PORT + port_number), 1916 &edge_port->shadow_msr, 1); 1917 if (status) { 1918 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n", 1919 __func__, status); 1920 return status; 1921 } 1922 1923 dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr); 1924 1925 /* Set Initial MCR */ 1926 edge_port->shadow_mcr = MCR_RTS | MCR_DTR; 1927 dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr); 1928 1929 edge_serial = edge_port->edge_serial; 1930 if (mutex_lock_interruptible(&edge_serial->es_lock)) 1931 return -ERESTARTSYS; 1932 if (edge_serial->num_ports_open == 0) { 1933 /* we are the first port to open, post the interrupt urb */ 1934 urb = edge_serial->serial->port[0]->interrupt_in_urb; 1935 urb->context = edge_serial; 1936 status = usb_submit_urb(urb, GFP_KERNEL); 1937 if (status) { 1938 dev_err(&port->dev, 1939 "%s - usb_submit_urb failed with value %d\n", 1940 __func__, status); 1941 goto release_es_lock; 1942 } 1943 } 1944 1945 /* 1946 * reset the data toggle on the bulk endpoints to work around bug in 1947 * host controllers where things get out of sync some times 1948 */ 1949 usb_clear_halt(dev, port->write_urb->pipe); 1950 usb_clear_halt(dev, port->read_urb->pipe); 1951 1952 /* start up our bulk read urb */ 1953 urb = port->read_urb; 1954 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING; 1955 urb->context = edge_port; 1956 status = usb_submit_urb(urb, GFP_KERNEL); 1957 if (status) { 1958 dev_err(&port->dev, 1959 "%s - read bulk usb_submit_urb failed with value %d\n", 1960 __func__, status); 1961 goto unlink_int_urb; 1962 } 1963 1964 ++edge_serial->num_ports_open; 1965 1966 goto release_es_lock; 1967 1968unlink_int_urb: 1969 if (edge_port->edge_serial->num_ports_open == 0) 1970 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 1971release_es_lock: 1972 mutex_unlock(&edge_serial->es_lock); 1973 return status; 1974} 1975 1976static void edge_close(struct usb_serial_port *port) 1977{ 1978 struct edgeport_serial *edge_serial; 1979 struct edgeport_port *edge_port; 1980 struct usb_serial *serial = port->serial; 1981 unsigned long flags; 1982 int port_number; 1983 1984 edge_serial = usb_get_serial_data(port->serial); 1985 edge_port = usb_get_serial_port_data(port); 1986 if (edge_serial == NULL || edge_port == NULL) 1987 return; 1988 1989 /* 1990 * The bulkreadcompletion routine will check 1991 * this flag and dump add read data 1992 */ 1993 edge_port->close_pending = 1; 1994 1995 usb_kill_urb(port->read_urb); 1996 usb_kill_urb(port->write_urb); 1997 edge_port->ep_write_urb_in_use = 0; 1998 spin_lock_irqsave(&edge_port->ep_lock, flags); 1999 kfifo_reset_out(&port->write_fifo); 2000 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2001 2002 dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__); 2003 port_number = port->port_number; 2004 send_cmd(serial->dev, UMPC_CLOSE_PORT, 2005 (__u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0); 2006 2007 mutex_lock(&edge_serial->es_lock); 2008 --edge_port->edge_serial->num_ports_open; 2009 if (edge_port->edge_serial->num_ports_open <= 0) { 2010 /* last port is now closed, let's shut down our interrupt urb */ 2011 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 2012 edge_port->edge_serial->num_ports_open = 0; 2013 } 2014 mutex_unlock(&edge_serial->es_lock); 2015 edge_port->close_pending = 0; 2016} 2017 2018static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 2019 const unsigned char *data, int count) 2020{ 2021 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2022 2023 if (count == 0) { 2024 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__); 2025 return 0; 2026 } 2027 2028 if (edge_port == NULL) 2029 return -ENODEV; 2030 if (edge_port->close_pending == 1) 2031 return -ENODEV; 2032 2033 count = kfifo_in_locked(&port->write_fifo, data, count, 2034 &edge_port->ep_lock); 2035 edge_send(port, tty); 2036 2037 return count; 2038} 2039 2040static void edge_send(struct usb_serial_port *port, struct tty_struct *tty) 2041{ 2042 int count, result; 2043 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2044 unsigned long flags; 2045 2046 spin_lock_irqsave(&edge_port->ep_lock, flags); 2047 2048 if (edge_port->ep_write_urb_in_use) { 2049 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2050 return; 2051 } 2052 2053 count = kfifo_out(&port->write_fifo, 2054 port->write_urb->transfer_buffer, 2055 port->bulk_out_size); 2056 2057 if (count == 0) { 2058 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2059 return; 2060 } 2061 2062 edge_port->ep_write_urb_in_use = 1; 2063 2064 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2065 2066 usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer); 2067 2068 /* set up our urb */ 2069 port->write_urb->transfer_buffer_length = count; 2070 2071 /* send the data out the bulk port */ 2072 result = usb_submit_urb(port->write_urb, GFP_ATOMIC); 2073 if (result) { 2074 dev_err_console(port, 2075 "%s - failed submitting write urb, error %d\n", 2076 __func__, result); 2077 edge_port->ep_write_urb_in_use = 0; 2078 /* TODO: reschedule edge_send */ 2079 } else 2080 edge_port->port->icount.tx += count; 2081 2082 /* 2083 * wakeup any process waiting for writes to complete 2084 * there is now more room in the buffer for new writes 2085 */ 2086 if (tty) 2087 tty_wakeup(tty); 2088} 2089 2090static int edge_write_room(struct tty_struct *tty) 2091{ 2092 struct usb_serial_port *port = tty->driver_data; 2093 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2094 int room = 0; 2095 unsigned long flags; 2096 2097 if (edge_port == NULL) 2098 return 0; 2099 if (edge_port->close_pending == 1) 2100 return 0; 2101 2102 spin_lock_irqsave(&edge_port->ep_lock, flags); 2103 room = kfifo_avail(&port->write_fifo); 2104 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2105 2106 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); 2107 return room; 2108} 2109 2110static int edge_chars_in_buffer(struct tty_struct *tty) 2111{ 2112 struct usb_serial_port *port = tty->driver_data; 2113 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2114 int chars = 0; 2115 unsigned long flags; 2116 if (edge_port == NULL) 2117 return 0; 2118 2119 spin_lock_irqsave(&edge_port->ep_lock, flags); 2120 chars = kfifo_len(&port->write_fifo); 2121 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2122 2123 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 2124 return chars; 2125} 2126 2127static bool edge_tx_empty(struct usb_serial_port *port) 2128{ 2129 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2130 int ret; 2131 2132 ret = tx_active(edge_port); 2133 if (ret > 0) 2134 return false; 2135 2136 return true; 2137} 2138 2139static void edge_throttle(struct tty_struct *tty) 2140{ 2141 struct usb_serial_port *port = tty->driver_data; 2142 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2143 int status; 2144 2145 if (edge_port == NULL) 2146 return; 2147 2148 /* if we are implementing XON/XOFF, send the stop character */ 2149 if (I_IXOFF(tty)) { 2150 unsigned char stop_char = STOP_CHAR(tty); 2151 status = edge_write(tty, port, &stop_char, 1); 2152 if (status <= 0) { 2153 dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status); 2154 } 2155 } 2156 2157 /* 2158 * if we are implementing RTS/CTS, stop reads 2159 * and the Edgeport will clear the RTS line 2160 */ 2161 if (C_CRTSCTS(tty)) 2162 stop_read(edge_port); 2163 2164} 2165 2166static void edge_unthrottle(struct tty_struct *tty) 2167{ 2168 struct usb_serial_port *port = tty->driver_data; 2169 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2170 int status; 2171 2172 if (edge_port == NULL) 2173 return; 2174 2175 /* if we are implementing XON/XOFF, send the start character */ 2176 if (I_IXOFF(tty)) { 2177 unsigned char start_char = START_CHAR(tty); 2178 status = edge_write(tty, port, &start_char, 1); 2179 if (status <= 0) { 2180 dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status); 2181 } 2182 } 2183 /* 2184 * if we are implementing RTS/CTS, restart reads 2185 * are the Edgeport will assert the RTS line 2186 */ 2187 if (C_CRTSCTS(tty)) { 2188 status = restart_read(edge_port); 2189 if (status) 2190 dev_err(&port->dev, 2191 "%s - read bulk usb_submit_urb failed: %d\n", 2192 __func__, status); 2193 } 2194 2195} 2196 2197static void stop_read(struct edgeport_port *edge_port) 2198{ 2199 unsigned long flags; 2200 2201 spin_lock_irqsave(&edge_port->ep_lock, flags); 2202 2203 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) 2204 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING; 2205 edge_port->shadow_mcr &= ~MCR_RTS; 2206 2207 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2208} 2209 2210static int restart_read(struct edgeport_port *edge_port) 2211{ 2212 struct urb *urb; 2213 int status = 0; 2214 unsigned long flags; 2215 2216 spin_lock_irqsave(&edge_port->ep_lock, flags); 2217 2218 if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) { 2219 urb = edge_port->port->read_urb; 2220 status = usb_submit_urb(urb, GFP_ATOMIC); 2221 } 2222 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING; 2223 edge_port->shadow_mcr |= MCR_RTS; 2224 2225 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2226 2227 return status; 2228} 2229 2230static void change_port_settings(struct tty_struct *tty, 2231 struct edgeport_port *edge_port, struct ktermios *old_termios) 2232{ 2233 struct device *dev = &edge_port->port->dev; 2234 struct ump_uart_config *config; 2235 int baud; 2236 unsigned cflag; 2237 int status; 2238 int port_number = edge_port->port->port_number; 2239 2240 config = kmalloc (sizeof (*config), GFP_KERNEL); 2241 if (!config) { 2242 tty->termios = *old_termios; 2243 return; 2244 } 2245 2246 cflag = tty->termios.c_cflag; 2247 2248 config->wFlags = 0; 2249 2250 /* These flags must be set */ 2251 config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT; 2252 config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR; 2253 config->bUartMode = (__u8)(edge_port->bUartMode); 2254 2255 switch (cflag & CSIZE) { 2256 case CS5: 2257 config->bDataBits = UMP_UART_CHAR5BITS; 2258 dev_dbg(dev, "%s - data bits = 5\n", __func__); 2259 break; 2260 case CS6: 2261 config->bDataBits = UMP_UART_CHAR6BITS; 2262 dev_dbg(dev, "%s - data bits = 6\n", __func__); 2263 break; 2264 case CS7: 2265 config->bDataBits = UMP_UART_CHAR7BITS; 2266 dev_dbg(dev, "%s - data bits = 7\n", __func__); 2267 break; 2268 default: 2269 case CS8: 2270 config->bDataBits = UMP_UART_CHAR8BITS; 2271 dev_dbg(dev, "%s - data bits = 8\n", __func__); 2272 break; 2273 } 2274 2275 if (cflag & PARENB) { 2276 if (cflag & PARODD) { 2277 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY; 2278 config->bParity = UMP_UART_ODDPARITY; 2279 dev_dbg(dev, "%s - parity = odd\n", __func__); 2280 } else { 2281 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY; 2282 config->bParity = UMP_UART_EVENPARITY; 2283 dev_dbg(dev, "%s - parity = even\n", __func__); 2284 } 2285 } else { 2286 config->bParity = UMP_UART_NOPARITY; 2287 dev_dbg(dev, "%s - parity = none\n", __func__); 2288 } 2289 2290 if (cflag & CSTOPB) { 2291 config->bStopBits = UMP_UART_STOPBIT2; 2292 dev_dbg(dev, "%s - stop bits = 2\n", __func__); 2293 } else { 2294 config->bStopBits = UMP_UART_STOPBIT1; 2295 dev_dbg(dev, "%s - stop bits = 1\n", __func__); 2296 } 2297 2298 /* figure out the flow control settings */ 2299 if (cflag & CRTSCTS) { 2300 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW; 2301 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW; 2302 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__); 2303 } else { 2304 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__); 2305 restart_read(edge_port); 2306 } 2307 2308 /* 2309 * if we are implementing XON/XOFF, set the start and stop 2310 * character in the device 2311 */ 2312 config->cXon = START_CHAR(tty); 2313 config->cXoff = STOP_CHAR(tty); 2314 2315 /* if we are implementing INBOUND XON/XOFF */ 2316 if (I_IXOFF(tty)) { 2317 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X; 2318 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", 2319 __func__, config->cXon, config->cXoff); 2320 } else 2321 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__); 2322 2323 /* if we are implementing OUTBOUND XON/XOFF */ 2324 if (I_IXON(tty)) { 2325 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X; 2326 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", 2327 __func__, config->cXon, config->cXoff); 2328 } else 2329 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__); 2330 2331 tty->termios.c_cflag &= ~CMSPAR; 2332 2333 /* Round the baud rate */ 2334 baud = tty_get_baud_rate(tty); 2335 if (!baud) { 2336 /* pick a default, any default... */ 2337 baud = 9600; 2338 } else { 2339 /* Avoid a zero divisor. */ 2340 baud = min(baud, 461550); 2341 tty_encode_baud_rate(tty, baud, baud); 2342 } 2343 2344 edge_port->baud_rate = baud; 2345 config->wBaudRate = (__u16)((461550L + baud/2) / baud); 2346 2347 /* FIXME: Recompute actual baud from divisor here */ 2348 2349 dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate); 2350 2351 dev_dbg(dev, "wBaudRate: %d\n", (int)(461550L / config->wBaudRate)); 2352 dev_dbg(dev, "wFlags: 0x%x\n", config->wFlags); 2353 dev_dbg(dev, "bDataBits: %d\n", config->bDataBits); 2354 dev_dbg(dev, "bParity: %d\n", config->bParity); 2355 dev_dbg(dev, "bStopBits: %d\n", config->bStopBits); 2356 dev_dbg(dev, "cXon: %d\n", config->cXon); 2357 dev_dbg(dev, "cXoff: %d\n", config->cXoff); 2358 dev_dbg(dev, "bUartMode: %d\n", config->bUartMode); 2359 2360 /* move the word values into big endian mode */ 2361 cpu_to_be16s(&config->wFlags); 2362 cpu_to_be16s(&config->wBaudRate); 2363 2364 status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG, 2365 (__u8)(UMPM_UART1_PORT + port_number), 2366 0, (__u8 *)config, sizeof(*config)); 2367 if (status) 2368 dev_dbg(dev, "%s - error %d when trying to write config to device\n", 2369 __func__, status); 2370 kfree(config); 2371} 2372 2373static void edge_set_termios(struct tty_struct *tty, 2374 struct usb_serial_port *port, struct ktermios *old_termios) 2375{ 2376 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2377 2378 if (edge_port == NULL) 2379 return; 2380 /* change the port settings to the new ones specified */ 2381 change_port_settings(tty, edge_port, old_termios); 2382} 2383 2384static int edge_tiocmset(struct tty_struct *tty, 2385 unsigned int set, unsigned int clear) 2386{ 2387 struct usb_serial_port *port = tty->driver_data; 2388 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2389 unsigned int mcr; 2390 unsigned long flags; 2391 2392 spin_lock_irqsave(&edge_port->ep_lock, flags); 2393 mcr = edge_port->shadow_mcr; 2394 if (set & TIOCM_RTS) 2395 mcr |= MCR_RTS; 2396 if (set & TIOCM_DTR) 2397 mcr |= MCR_DTR; 2398 if (set & TIOCM_LOOP) 2399 mcr |= MCR_LOOPBACK; 2400 2401 if (clear & TIOCM_RTS) 2402 mcr &= ~MCR_RTS; 2403 if (clear & TIOCM_DTR) 2404 mcr &= ~MCR_DTR; 2405 if (clear & TIOCM_LOOP) 2406 mcr &= ~MCR_LOOPBACK; 2407 2408 edge_port->shadow_mcr = mcr; 2409 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2410 2411 restore_mcr(edge_port, mcr); 2412 return 0; 2413} 2414 2415static int edge_tiocmget(struct tty_struct *tty) 2416{ 2417 struct usb_serial_port *port = tty->driver_data; 2418 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2419 unsigned int result = 0; 2420 unsigned int msr; 2421 unsigned int mcr; 2422 unsigned long flags; 2423 2424 spin_lock_irqsave(&edge_port->ep_lock, flags); 2425 2426 msr = edge_port->shadow_msr; 2427 mcr = edge_port->shadow_mcr; 2428 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 2429 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 2430 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 2431 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 2432 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 2433 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 2434 2435 2436 dev_dbg(&port->dev, "%s -- %x\n", __func__, result); 2437 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2438 2439 return result; 2440} 2441 2442static int get_serial_info(struct tty_struct *tty, 2443 struct serial_struct *ss) 2444{ 2445 struct usb_serial_port *port = tty->driver_data; 2446 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2447 unsigned cwait; 2448 2449 cwait = edge_port->port->port.closing_wait; 2450 if (cwait != ASYNC_CLOSING_WAIT_NONE) 2451 cwait = jiffies_to_msecs(cwait) / 10; 2452 2453 ss->type = PORT_16550A; 2454 ss->line = edge_port->port->minor; 2455 ss->port = edge_port->port->port_number; 2456 ss->irq = 0; 2457 ss->xmit_fifo_size = edge_port->port->bulk_out_size; 2458 ss->baud_base = 9600; 2459 ss->close_delay = 5*HZ; 2460 ss->closing_wait = cwait; 2461 return 0; 2462} 2463 2464static void edge_break(struct tty_struct *tty, int break_state) 2465{ 2466 struct usb_serial_port *port = tty->driver_data; 2467 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2468 int status; 2469 int bv = 0; /* Off */ 2470 2471 if (break_state == -1) 2472 bv = 1; /* On */ 2473 status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv); 2474 if (status) 2475 dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n", 2476 __func__, status); 2477} 2478 2479static void edge_heartbeat_schedule(struct edgeport_serial *edge_serial) 2480{ 2481 if (!edge_serial->use_heartbeat) 2482 return; 2483 2484 schedule_delayed_work(&edge_serial->heartbeat_work, 2485 FW_HEARTBEAT_SECS * HZ); 2486} 2487 2488static void edge_heartbeat_work(struct work_struct *work) 2489{ 2490 struct edgeport_serial *serial; 2491 struct ti_i2c_desc *rom_desc; 2492 2493 serial = container_of(work, struct edgeport_serial, 2494 heartbeat_work.work); 2495 2496 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 2497 2498 /* Descriptor address request is enough to reset the firmware timer */ 2499 if (!rom_desc || !get_descriptor_addr(serial, I2C_DESC_TYPE_ION, 2500 rom_desc)) { 2501 dev_err(&serial->serial->interface->dev, 2502 "%s - Incomplete heartbeat\n", __func__); 2503 } 2504 kfree(rom_desc); 2505 2506 edge_heartbeat_schedule(serial); 2507} 2508 2509static int edge_calc_num_ports(struct usb_serial *serial, 2510 struct usb_serial_endpoints *epds) 2511{ 2512 struct device *dev = &serial->interface->dev; 2513 unsigned char num_ports = serial->type->num_ports; 2514 2515 /* Make sure we have the required endpoints when in download mode. */ 2516 if (serial->interface->cur_altsetting->desc.bNumEndpoints > 1) { 2517 if (epds->num_bulk_in < num_ports || 2518 epds->num_bulk_out < num_ports || 2519 epds->num_interrupt_in < 1) { 2520 dev_err(dev, "required endpoints missing\n"); 2521 return -ENODEV; 2522 } 2523 } 2524 2525 return num_ports; 2526} 2527 2528static int edge_startup(struct usb_serial *serial) 2529{ 2530 struct edgeport_serial *edge_serial; 2531 int status; 2532 u16 product_id; 2533 2534 /* create our private serial structure */ 2535 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); 2536 if (!edge_serial) 2537 return -ENOMEM; 2538 2539 mutex_init(&edge_serial->es_lock); 2540 edge_serial->serial = serial; 2541 INIT_DELAYED_WORK(&edge_serial->heartbeat_work, edge_heartbeat_work); 2542 usb_set_serial_data(serial, edge_serial); 2543 2544 status = download_fw(edge_serial); 2545 if (status < 0) { 2546 kfree(edge_serial); 2547 return status; 2548 } 2549 2550 if (status > 0) 2551 return 1; /* bind but do not register any ports */ 2552 2553 product_id = le16_to_cpu( 2554 edge_serial->serial->dev->descriptor.idProduct); 2555 2556 /* Currently only the EP/416 models require heartbeat support */ 2557 if (edge_serial->fw_version > FW_HEARTBEAT_VERSION_CUTOFF) { 2558 if (product_id == ION_DEVICE_ID_TI_EDGEPORT_416 || 2559 product_id == ION_DEVICE_ID_TI_EDGEPORT_416B) { 2560 edge_serial->use_heartbeat = true; 2561 } 2562 } 2563 2564 edge_heartbeat_schedule(edge_serial); 2565 2566 return 0; 2567} 2568 2569static void edge_disconnect(struct usb_serial *serial) 2570{ 2571 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 2572 2573 cancel_delayed_work_sync(&edge_serial->heartbeat_work); 2574} 2575 2576static void edge_release(struct usb_serial *serial) 2577{ 2578 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 2579 2580 cancel_delayed_work_sync(&edge_serial->heartbeat_work); 2581 kfree(edge_serial); 2582} 2583 2584static int edge_port_probe(struct usb_serial_port *port) 2585{ 2586 struct edgeport_port *edge_port; 2587 int ret; 2588 2589 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL); 2590 if (!edge_port) 2591 return -ENOMEM; 2592 2593 spin_lock_init(&edge_port->ep_lock); 2594 edge_port->port = port; 2595 edge_port->edge_serial = usb_get_serial_data(port->serial); 2596 edge_port->bUartMode = default_uart_mode; 2597 2598 switch (port->port_number) { 2599 case 0: 2600 edge_port->uart_base = UMPMEM_BASE_UART1; 2601 edge_port->dma_address = UMPD_OEDB1_ADDRESS; 2602 break; 2603 case 1: 2604 edge_port->uart_base = UMPMEM_BASE_UART2; 2605 edge_port->dma_address = UMPD_OEDB2_ADDRESS; 2606 break; 2607 default: 2608 dev_err(&port->dev, "unknown port number\n"); 2609 ret = -ENODEV; 2610 goto err; 2611 } 2612 2613 dev_dbg(&port->dev, 2614 "%s - port_number = %d, uart_base = %04x, dma_address = %04x\n", 2615 __func__, port->port_number, edge_port->uart_base, 2616 edge_port->dma_address); 2617 2618 usb_set_serial_port_data(port, edge_port); 2619 2620 ret = edge_create_sysfs_attrs(port); 2621 if (ret) 2622 goto err; 2623 2624 port->port.closing_wait = msecs_to_jiffies(closing_wait * 10); 2625 port->port.drain_delay = 1; 2626 2627 return 0; 2628err: 2629 kfree(edge_port); 2630 2631 return ret; 2632} 2633 2634static int edge_port_remove(struct usb_serial_port *port) 2635{ 2636 struct edgeport_port *edge_port; 2637 2638 edge_port = usb_get_serial_port_data(port); 2639 edge_remove_sysfs_attrs(port); 2640 kfree(edge_port); 2641 2642 return 0; 2643} 2644 2645/* Sysfs Attributes */ 2646 2647static ssize_t uart_mode_show(struct device *dev, 2648 struct device_attribute *attr, char *buf) 2649{ 2650 struct usb_serial_port *port = to_usb_serial_port(dev); 2651 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2652 2653 return sprintf(buf, "%d\n", edge_port->bUartMode); 2654} 2655 2656static ssize_t uart_mode_store(struct device *dev, 2657 struct device_attribute *attr, const char *valbuf, size_t count) 2658{ 2659 struct usb_serial_port *port = to_usb_serial_port(dev); 2660 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2661 unsigned int v = simple_strtoul(valbuf, NULL, 0); 2662 2663 dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v); 2664 2665 if (v < 256) 2666 edge_port->bUartMode = v; 2667 else 2668 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v); 2669 2670 return count; 2671} 2672static DEVICE_ATTR_RW(uart_mode); 2673 2674static int edge_create_sysfs_attrs(struct usb_serial_port *port) 2675{ 2676 return device_create_file(&port->dev, &dev_attr_uart_mode); 2677} 2678 2679static int edge_remove_sysfs_attrs(struct usb_serial_port *port) 2680{ 2681 device_remove_file(&port->dev, &dev_attr_uart_mode); 2682 return 0; 2683} 2684 2685#ifdef CONFIG_PM 2686static int edge_suspend(struct usb_serial *serial, pm_message_t message) 2687{ 2688 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 2689 2690 cancel_delayed_work_sync(&edge_serial->heartbeat_work); 2691 2692 return 0; 2693} 2694 2695static int edge_resume(struct usb_serial *serial) 2696{ 2697 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 2698 2699 edge_heartbeat_schedule(edge_serial); 2700 2701 return 0; 2702} 2703#endif 2704 2705static struct usb_serial_driver edgeport_1port_device = { 2706 .driver = { 2707 .owner = THIS_MODULE, 2708 .name = "edgeport_ti_1", 2709 }, 2710 .description = "Edgeport TI 1 port adapter", 2711 .id_table = edgeport_1port_id_table, 2712 .num_ports = 1, 2713 .num_bulk_out = 1, 2714 .open = edge_open, 2715 .close = edge_close, 2716 .throttle = edge_throttle, 2717 .unthrottle = edge_unthrottle, 2718 .attach = edge_startup, 2719 .calc_num_ports = edge_calc_num_ports, 2720 .disconnect = edge_disconnect, 2721 .release = edge_release, 2722 .port_probe = edge_port_probe, 2723 .port_remove = edge_port_remove, 2724 .get_serial = get_serial_info, 2725 .set_termios = edge_set_termios, 2726 .tiocmget = edge_tiocmget, 2727 .tiocmset = edge_tiocmset, 2728 .tiocmiwait = usb_serial_generic_tiocmiwait, 2729 .get_icount = usb_serial_generic_get_icount, 2730 .write = edge_write, 2731 .write_room = edge_write_room, 2732 .chars_in_buffer = edge_chars_in_buffer, 2733 .tx_empty = edge_tx_empty, 2734 .break_ctl = edge_break, 2735 .read_int_callback = edge_interrupt_callback, 2736 .read_bulk_callback = edge_bulk_in_callback, 2737 .write_bulk_callback = edge_bulk_out_callback, 2738#ifdef CONFIG_PM 2739 .suspend = edge_suspend, 2740 .resume = edge_resume, 2741#endif 2742}; 2743 2744static struct usb_serial_driver edgeport_2port_device = { 2745 .driver = { 2746 .owner = THIS_MODULE, 2747 .name = "edgeport_ti_2", 2748 }, 2749 .description = "Edgeport TI 2 port adapter", 2750 .id_table = edgeport_2port_id_table, 2751 .num_ports = 2, 2752 .num_bulk_out = 1, 2753 .open = edge_open, 2754 .close = edge_close, 2755 .throttle = edge_throttle, 2756 .unthrottle = edge_unthrottle, 2757 .attach = edge_startup, 2758 .calc_num_ports = edge_calc_num_ports, 2759 .disconnect = edge_disconnect, 2760 .release = edge_release, 2761 .port_probe = edge_port_probe, 2762 .port_remove = edge_port_remove, 2763 .get_serial = get_serial_info, 2764 .set_termios = edge_set_termios, 2765 .tiocmget = edge_tiocmget, 2766 .tiocmset = edge_tiocmset, 2767 .tiocmiwait = usb_serial_generic_tiocmiwait, 2768 .get_icount = usb_serial_generic_get_icount, 2769 .write = edge_write, 2770 .write_room = edge_write_room, 2771 .chars_in_buffer = edge_chars_in_buffer, 2772 .tx_empty = edge_tx_empty, 2773 .break_ctl = edge_break, 2774 .read_int_callback = edge_interrupt_callback, 2775 .read_bulk_callback = edge_bulk_in_callback, 2776 .write_bulk_callback = edge_bulk_out_callback, 2777#ifdef CONFIG_PM 2778 .suspend = edge_suspend, 2779 .resume = edge_resume, 2780#endif 2781}; 2782 2783static struct usb_serial_driver * const serial_drivers[] = { 2784 &edgeport_1port_device, &edgeport_2port_device, NULL 2785}; 2786 2787module_usb_serial_driver(serial_drivers, id_table_combined); 2788 2789MODULE_AUTHOR(DRIVER_AUTHOR); 2790MODULE_DESCRIPTION(DRIVER_DESC); 2791MODULE_LICENSE("GPL"); 2792MODULE_FIRMWARE("edgeport/down3.bin"); 2793 2794module_param(closing_wait, int, S_IRUGO | S_IWUSR); 2795MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs"); 2796 2797module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR); 2798MODULE_PARM_DESC(ignore_cpu_rev, 2799 "Ignore the cpu revision when connecting to a device"); 2800 2801module_param(default_uart_mode, int, S_IRUGO | S_IWUSR); 2802MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ..."); 2803