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 59 struct 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_CLOSING_WAIT 4000 /* in .01 sec */ 80 81 #define EDGE_OUT_BUF_SIZE 1024 82 83 84 /* Product information read from the Edgeport */ 85 struct product_info { 86 int TiMode; /* Current TI Mode */ 87 __u8 hardware_type; /* Type of hardware */ 88 } __attribute__((packed)); 89 90 /* circular buffer */ 91 struct edge_buf { 92 unsigned int buf_size; 93 char *buf_buf; 94 char *buf_get; 95 char *buf_put; 96 }; 97 98 struct edgeport_port { 99 __u16 uart_base; 100 __u16 dma_address; 101 __u8 shadow_msr; 102 __u8 shadow_mcr; 103 __u8 shadow_lsr; 104 __u8 lsr_mask; 105 __u32 ump_read_timeout; /* Number of milliseconds the UMP will 106 wait without data before completing 107 a read short */ 108 int baud_rate; 109 int close_pending; 110 int lsr_event; 111 struct edgeport_uart_buf_desc tx; 112 struct async_icount icount; 113 wait_queue_head_t delta_msr_wait; /* for handling sleeping while 114 waiting for msr change to 115 happen */ 116 struct edgeport_serial *edge_serial; 117 struct usb_serial_port *port; 118 __u8 bUartMode; /* Port type, 0: RS232, etc. */ 119 spinlock_t ep_lock; 120 int ep_read_urb_state; 121 int ep_write_urb_in_use; 122 struct edge_buf *ep_out_buf; 123 }; 124 125 struct edgeport_serial { 126 struct product_info product_info; 127 u8 TI_I2C_Type; /* Type of I2C in UMP */ 128 u8 TiReadI2C; /* Set to TRUE if we have read the 129 I2c in Boot Mode */ 130 struct mutex es_lock; 131 int num_ports_open; 132 struct usb_serial *serial; 133 }; 134 135 136 /* Devices that this driver supports */ 137 static struct usb_device_id edgeport_1port_id_table [] = { 138 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) }, 139 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) }, 140 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) }, 141 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) }, 142 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) }, 143 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) }, 144 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) }, 145 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) }, 146 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) }, 147 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) }, 148 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) }, 149 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) }, 150 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) }, 151 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) }, 152 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) }, 153 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) }, 154 { } 155 }; 156 157 static struct usb_device_id edgeport_2port_id_table [] = { 158 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) }, 159 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) }, 160 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) }, 161 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) }, 162 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) }, 163 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) }, 164 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) }, 165 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) }, 166 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) }, 167 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) }, 168 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) }, 169 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) }, 170 /* The 4, 8 and 16 port devices show up as multiple 2 port devices */ 171 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) }, 172 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) }, 173 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) }, 174 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) }, 175 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) }, 176 { } 177 }; 178 179 /* Devices that this driver supports */ 180 static struct usb_device_id id_table_combined [] = { 181 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) }, 182 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) }, 183 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) }, 184 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) }, 185 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) }, 186 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) }, 187 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) }, 188 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) }, 189 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) }, 190 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) }, 191 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) }, 192 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) }, 193 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) }, 194 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) }, 195 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) }, 196 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) }, 197 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) }, 198 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) }, 199 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) }, 200 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) }, 201 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) }, 202 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) }, 203 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) }, 204 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) }, 205 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) }, 206 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) }, 207 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) }, 208 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) }, 209 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) }, 210 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) }, 211 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) }, 212 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) }, 213 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) }, 214 { } 215 }; 216 217 MODULE_DEVICE_TABLE(usb, id_table_combined); 218 219 static struct usb_driver io_driver = { 220 .name = "io_ti", 221 .probe = usb_serial_probe, 222 .disconnect = usb_serial_disconnect, 223 .id_table = id_table_combined, 224 .no_dynamic_id = 1, 225 }; 226 227 228 static unsigned char OperationalMajorVersion; 229 static unsigned char OperationalMinorVersion; 230 static unsigned short OperationalBuildNumber; 231 232 static int debug; 233 234 static int closing_wait = EDGE_CLOSING_WAIT; 235 static int ignore_cpu_rev; 236 static int default_uart_mode; /* RS232 */ 237 238 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, 239 unsigned char *data, int length); 240 241 static void stop_read(struct edgeport_port *edge_port); 242 static int restart_read(struct edgeport_port *edge_port); 243 244 static void edge_set_termios(struct tty_struct *tty, 245 struct usb_serial_port *port, struct ktermios *old_termios); 246 static void edge_send(struct tty_struct *tty); 247 248 /* sysfs attributes */ 249 static int edge_create_sysfs_attrs(struct usb_serial_port *port); 250 static int edge_remove_sysfs_attrs(struct usb_serial_port *port); 251 252 /* circular buffer */ 253 static struct edge_buf *edge_buf_alloc(unsigned int size); 254 static void edge_buf_free(struct edge_buf *eb); 255 static void edge_buf_clear(struct edge_buf *eb); 256 static unsigned int edge_buf_data_avail(struct edge_buf *eb); 257 static unsigned int edge_buf_space_avail(struct edge_buf *eb); 258 static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf, 259 unsigned int count); 260 static unsigned int edge_buf_get(struct edge_buf *eb, char *buf, 261 unsigned int count); 262 263 264 static int ti_vread_sync(struct usb_device *dev, __u8 request, 265 __u16 value, __u16 index, u8 *data, int size) 266 { 267 int status; 268 269 status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request, 270 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN), 271 value, index, data, size, 1000); 272 if (status < 0) 273 return status; 274 if (status != size) { 275 dbg("%s - wanted to write %d, but only wrote %d", 276 __func__, size, status); 277 return -ECOMM; 278 } 279 return 0; 280 } 281 282 static int ti_vsend_sync(struct usb_device *dev, __u8 request, 283 __u16 value, __u16 index, u8 *data, int size) 284 { 285 int status; 286 287 status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request, 288 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT), 289 value, index, data, size, 1000); 290 if (status < 0) 291 return status; 292 if (status != size) { 293 dbg("%s - wanted to write %d, but only wrote %d", 294 __func__, size, status); 295 return -ECOMM; 296 } 297 return 0; 298 } 299 300 static int send_cmd(struct usb_device *dev, __u8 command, 301 __u8 moduleid, __u16 value, u8 *data, 302 int size) 303 { 304 return ti_vsend_sync(dev, command, value, moduleid, data, size); 305 } 306 307 /* clear tx/rx buffers and fifo in TI UMP */ 308 static int purge_port(struct usb_serial_port *port, __u16 mask) 309 { 310 int port_number = port->number - port->serial->minor; 311 312 dbg("%s - port %d, mask %x", __func__, port_number, mask); 313 314 return send_cmd(port->serial->dev, 315 UMPC_PURGE_PORT, 316 (__u8)(UMPM_UART1_PORT + port_number), 317 mask, 318 NULL, 319 0); 320 } 321 322 /** 323 * read_download_mem - Read edgeport memory from TI chip 324 * @dev: usb device pointer 325 * @start_address: Device CPU address at which to read 326 * @length: Length of above data 327 * @address_type: Can read both XDATA and I2C 328 * @buffer: pointer to input data buffer 329 */ 330 static int read_download_mem(struct usb_device *dev, int start_address, 331 int length, __u8 address_type, __u8 *buffer) 332 { 333 int status = 0; 334 __u8 read_length; 335 __be16 be_start_address; 336 337 dbg("%s - @ %x for %d", __func__, start_address, length); 338 339 /* Read in blocks of 64 bytes 340 * (TI firmware can't handle more than 64 byte reads) 341 */ 342 while (length) { 343 if (length > 64) 344 read_length = 64; 345 else 346 read_length = (__u8)length; 347 348 if (read_length > 1) { 349 dbg("%s - @ %x for %d", __func__, 350 start_address, read_length); 351 } 352 be_start_address = cpu_to_be16(start_address); 353 status = ti_vread_sync(dev, UMPC_MEMORY_READ, 354 (__u16)address_type, 355 (__force __u16)be_start_address, 356 buffer, read_length); 357 358 if (status) { 359 dbg("%s - ERROR %x", __func__, status); 360 return status; 361 } 362 363 if (read_length > 1) 364 usb_serial_debug_data(debug, &dev->dev, __func__, 365 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 } 375 376 static 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 */ 384 static 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 dbg("%s - ERROR %x", __func__, status); 396 return status; 397 } 398 } 399 400 dbg("%s - start_address = %x, length = %d", 401 __func__, start_address, length); 402 usb_serial_debug_data(debug, &serial->serial->dev->dev, 403 __func__, length, buffer); 404 405 serial->TiReadI2C = 1; 406 407 return status; 408 } 409 410 /* Write given block to TI EPROM memory */ 411 static int write_boot_mem(struct edgeport_serial *serial, 412 int start_address, int length, __u8 *buffer) 413 { 414 int status = 0; 415 int i; 416 __u8 temp; 417 418 /* Must do a read before write */ 419 if (!serial->TiReadI2C) { 420 status = read_boot_mem(serial, 0, 1, &temp); 421 if (status) 422 return status; 423 } 424 425 for (i = 0; i < length; ++i) { 426 status = ti_vsend_sync(serial->serial->dev, 427 UMPC_MEMORY_WRITE, buffer[i], 428 (__u16)(i + start_address), NULL, 0); 429 if (status) 430 return status; 431 } 432 433 dbg("%s - start_sddr = %x, length = %d", 434 __func__, start_address, length); 435 usb_serial_debug_data(debug, &serial->serial->dev->dev, 436 __func__, length, buffer); 437 438 return status; 439 } 440 441 442 /* Write edgeport I2C memory to TI chip */ 443 static int write_i2c_mem(struct edgeport_serial *serial, 444 int start_address, int length, __u8 address_type, __u8 *buffer) 445 { 446 int status = 0; 447 int write_length; 448 __be16 be_start_address; 449 450 /* We can only send a maximum of 1 aligned byte page at a time */ 451 452 /* calulate the number of bytes left in the first page */ 453 write_length = EPROM_PAGE_SIZE - 454 (start_address & (EPROM_PAGE_SIZE - 1)); 455 456 if (write_length > length) 457 write_length = length; 458 459 dbg("%s - BytesInFirstPage Addr = %x, length = %d", 460 __func__, start_address, write_length); 461 usb_serial_debug_data(debug, &serial->serial->dev->dev, 462 __func__, write_length, buffer); 463 464 /* Write first page */ 465 be_start_address = cpu_to_be16(start_address); 466 status = ti_vsend_sync(serial->serial->dev, 467 UMPC_MEMORY_WRITE, (__u16)address_type, 468 (__force __u16)be_start_address, 469 buffer, write_length); 470 if (status) { 471 dbg("%s - ERROR %d", __func__, status); 472 return status; 473 } 474 475 length -= write_length; 476 start_address += write_length; 477 buffer += write_length; 478 479 /* We should be aligned now -- can write 480 max page size bytes at a time */ 481 while (length) { 482 if (length > EPROM_PAGE_SIZE) 483 write_length = EPROM_PAGE_SIZE; 484 else 485 write_length = length; 486 487 dbg("%s - Page Write Addr = %x, length = %d", 488 __func__, start_address, write_length); 489 usb_serial_debug_data(debug, &serial->serial->dev->dev, 490 __func__, write_length, buffer); 491 492 /* Write next page */ 493 be_start_address = cpu_to_be16(start_address); 494 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE, 495 (__u16)address_type, 496 (__force __u16)be_start_address, 497 buffer, write_length); 498 if (status) { 499 dev_err(&serial->serial->dev->dev, "%s - ERROR %d\n", 500 __func__, status); 501 return status; 502 } 503 504 length -= write_length; 505 start_address += write_length; 506 buffer += write_length; 507 } 508 return status; 509 } 510 511 /* Examine the UMP DMA registers and LSR 512 * 513 * Check the MSBit of the X and Y DMA byte count registers. 514 * A zero in this bit indicates that the TX DMA buffers are empty 515 * then check the TX Empty bit in the UART. 516 */ 517 static int tx_active(struct edgeport_port *port) 518 { 519 int status; 520 struct out_endpoint_desc_block *oedb; 521 __u8 *lsr; 522 int bytes_left = 0; 523 524 oedb = kmalloc(sizeof(*oedb), GFP_KERNEL); 525 if (!oedb) { 526 dev_err(&port->port->dev, "%s - out of memory\n", __func__); 527 return -ENOMEM; 528 } 529 530 lsr = kmalloc(1, GFP_KERNEL); /* Sigh, that's right, just one byte, 531 as not all platforms can do DMA 532 from stack */ 533 if (!lsr) { 534 kfree(oedb); 535 return -ENOMEM; 536 } 537 /* Read the DMA Count Registers */ 538 status = read_ram(port->port->serial->dev, port->dma_address, 539 sizeof(*oedb), (void *)oedb); 540 if (status) 541 goto exit_is_tx_active; 542 543 dbg("%s - XByteCount 0x%X", __func__, oedb->XByteCount); 544 545 /* and the LSR */ 546 status = read_ram(port->port->serial->dev, 547 port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr); 548 549 if (status) 550 goto exit_is_tx_active; 551 dbg("%s - LSR = 0x%X", __func__, *lsr); 552 553 /* If either buffer has data or we are transmitting then return TRUE */ 554 if ((oedb->XByteCount & 0x80) != 0) 555 bytes_left += 64; 556 557 if ((*lsr & UMP_UART_LSR_TX_MASK) == 0) 558 bytes_left += 1; 559 560 /* We return Not Active if we get any kind of error */ 561 exit_is_tx_active: 562 dbg("%s - return %d", __func__, bytes_left); 563 564 kfree(lsr); 565 kfree(oedb); 566 return bytes_left; 567 } 568 569 static void chase_port(struct edgeport_port *port, unsigned long timeout, 570 int flush) 571 { 572 int baud_rate; 573 struct tty_struct *tty = tty_port_tty_get(&port->port->port); 574 wait_queue_t wait; 575 unsigned long flags; 576 577 if (!timeout) 578 timeout = (HZ * EDGE_CLOSING_WAIT)/100; 579 580 /* wait for data to drain from the buffer */ 581 spin_lock_irqsave(&port->ep_lock, flags); 582 init_waitqueue_entry(&wait, current); 583 add_wait_queue(&tty->write_wait, &wait); 584 for (;;) { 585 set_current_state(TASK_INTERRUPTIBLE); 586 if (edge_buf_data_avail(port->ep_out_buf) == 0 587 || timeout == 0 || signal_pending(current) 588 || !usb_get_intfdata(port->port->serial->interface)) 589 /* disconnect */ 590 break; 591 spin_unlock_irqrestore(&port->ep_lock, flags); 592 timeout = schedule_timeout(timeout); 593 spin_lock_irqsave(&port->ep_lock, flags); 594 } 595 set_current_state(TASK_RUNNING); 596 remove_wait_queue(&tty->write_wait, &wait); 597 if (flush) 598 edge_buf_clear(port->ep_out_buf); 599 spin_unlock_irqrestore(&port->ep_lock, flags); 600 tty_kref_put(tty); 601 602 /* wait for data to drain from the device */ 603 timeout += jiffies; 604 while ((long)(jiffies - timeout) < 0 && !signal_pending(current) 605 && usb_get_intfdata(port->port->serial->interface)) { 606 /* not disconnected */ 607 if (!tx_active(port)) 608 break; 609 msleep(10); 610 } 611 612 /* disconnected */ 613 if (!usb_get_intfdata(port->port->serial->interface)) 614 return; 615 616 /* wait one more character time, based on baud rate */ 617 /* (tx_active doesn't seem to wait for the last byte) */ 618 baud_rate = port->baud_rate; 619 if (baud_rate == 0) 620 baud_rate = 50; 621 msleep(max(1, DIV_ROUND_UP(10000, baud_rate))); 622 } 623 624 static int choose_config(struct usb_device *dev) 625 { 626 /* 627 * There may be multiple configurations on this device, in which case 628 * we would need to read and parse all of them to find out which one 629 * we want. However, we just support one config at this point, 630 * configuration # 1, which is Config Descriptor 0. 631 */ 632 633 dbg("%s - Number of Interfaces = %d", 634 __func__, dev->config->desc.bNumInterfaces); 635 dbg("%s - MAX Power = %d", 636 __func__, dev->config->desc.bMaxPower * 2); 637 638 if (dev->config->desc.bNumInterfaces != 1) { 639 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", 640 __func__); 641 return -ENODEV; 642 } 643 644 return 0; 645 } 646 647 static int read_rom(struct edgeport_serial *serial, 648 int start_address, int length, __u8 *buffer) 649 { 650 int status; 651 652 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) { 653 status = read_download_mem(serial->serial->dev, 654 start_address, 655 length, 656 serial->TI_I2C_Type, 657 buffer); 658 } else { 659 status = read_boot_mem(serial, start_address, length, 660 buffer); 661 } 662 return status; 663 } 664 665 static int write_rom(struct edgeport_serial *serial, int start_address, 666 int length, __u8 *buffer) 667 { 668 if (serial->product_info.TiMode == TI_MODE_BOOT) 669 return write_boot_mem(serial, start_address, length, 670 buffer); 671 672 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) 673 return write_i2c_mem(serial, start_address, length, 674 serial->TI_I2C_Type, buffer); 675 return -EINVAL; 676 } 677 678 679 680 /* Read a descriptor header from I2C based on type */ 681 static int get_descriptor_addr(struct edgeport_serial *serial, 682 int desc_type, struct ti_i2c_desc *rom_desc) 683 { 684 int start_address; 685 int status; 686 687 /* Search for requested descriptor in I2C */ 688 start_address = 2; 689 do { 690 status = read_rom(serial, 691 start_address, 692 sizeof(struct ti_i2c_desc), 693 (__u8 *)rom_desc); 694 if (status) 695 return 0; 696 697 if (rom_desc->Type == desc_type) 698 return start_address; 699 700 start_address = start_address + sizeof(struct ti_i2c_desc) 701 + rom_desc->Size; 702 703 } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type); 704 705 return 0; 706 } 707 708 /* Validate descriptor checksum */ 709 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer) 710 { 711 __u16 i; 712 __u8 cs = 0; 713 714 for (i = 0; i < rom_desc->Size; i++) 715 cs = (__u8)(cs + buffer[i]); 716 717 if (cs != rom_desc->CheckSum) { 718 dbg("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs); 719 return -EINVAL; 720 } 721 return 0; 722 } 723 724 /* Make sure that the I2C image is good */ 725 static int check_i2c_image(struct edgeport_serial *serial) 726 { 727 struct device *dev = &serial->serial->dev->dev; 728 int status = 0; 729 struct ti_i2c_desc *rom_desc; 730 int start_address = 2; 731 __u8 *buffer; 732 __u16 ttype; 733 734 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 735 if (!rom_desc) { 736 dev_err(dev, "%s - out of memory\n", __func__); 737 return -ENOMEM; 738 } 739 buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL); 740 if (!buffer) { 741 dev_err(dev, "%s - out of memory when allocating buffer\n", 742 __func__); 743 kfree(rom_desc); 744 return -ENOMEM; 745 } 746 747 /* Read the first byte (Signature0) must be 0x52 or 0x10 */ 748 status = read_rom(serial, 0, 1, buffer); 749 if (status) 750 goto out; 751 752 if (*buffer != UMP5152 && *buffer != UMP3410) { 753 dev_err(dev, "%s - invalid buffer signature\n", __func__); 754 status = -ENODEV; 755 goto out; 756 } 757 758 do { 759 /* Validate the I2C */ 760 status = read_rom(serial, 761 start_address, 762 sizeof(struct ti_i2c_desc), 763 (__u8 *)rom_desc); 764 if (status) 765 break; 766 767 if ((start_address + sizeof(struct ti_i2c_desc) + 768 rom_desc->Size) > TI_MAX_I2C_SIZE) { 769 status = -ENODEV; 770 dbg("%s - structure too big, erroring out.", __func__); 771 break; 772 } 773 774 dbg("%s Type = 0x%x", __func__, rom_desc->Type); 775 776 /* Skip type 2 record */ 777 ttype = rom_desc->Type & 0x0f; 778 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC 779 && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) { 780 /* Read the descriptor data */ 781 status = read_rom(serial, start_address + 782 sizeof(struct ti_i2c_desc), 783 rom_desc->Size, buffer); 784 if (status) 785 break; 786 787 status = valid_csum(rom_desc, buffer); 788 if (status) 789 break; 790 } 791 start_address = start_address + sizeof(struct ti_i2c_desc) + 792 rom_desc->Size; 793 794 } while ((rom_desc->Type != I2C_DESC_TYPE_ION) && 795 (start_address < TI_MAX_I2C_SIZE)); 796 797 if ((rom_desc->Type != I2C_DESC_TYPE_ION) || 798 (start_address > TI_MAX_I2C_SIZE)) 799 status = -ENODEV; 800 801 out: 802 kfree(buffer); 803 kfree(rom_desc); 804 return status; 805 } 806 807 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer) 808 { 809 int status; 810 int start_address; 811 struct ti_i2c_desc *rom_desc; 812 struct edge_ti_manuf_descriptor *desc; 813 814 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 815 if (!rom_desc) { 816 dev_err(&serial->serial->dev->dev, "%s - out of memory\n", 817 __func__); 818 return -ENOMEM; 819 } 820 start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION, 821 rom_desc); 822 823 if (!start_address) { 824 dbg("%s - Edge Descriptor not found in I2C", __func__); 825 status = -ENODEV; 826 goto exit; 827 } 828 829 /* Read the descriptor data */ 830 status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc), 831 rom_desc->Size, buffer); 832 if (status) 833 goto exit; 834 835 status = valid_csum(rom_desc, buffer); 836 837 desc = (struct edge_ti_manuf_descriptor *)buffer; 838 dbg("%s - IonConfig 0x%x", __func__, desc->IonConfig); 839 dbg("%s - Version %d", __func__, desc->Version); 840 dbg("%s - Cpu/Board 0x%x", __func__, desc->CpuRev_BoardRev); 841 dbg("%s - NumPorts %d", __func__, desc->NumPorts); 842 dbg("%s - NumVirtualPorts %d", __func__, desc->NumVirtualPorts); 843 dbg("%s - TotalPorts %d", __func__, desc->TotalPorts); 844 845 exit: 846 kfree(rom_desc); 847 return status; 848 } 849 850 /* Build firmware header used for firmware update */ 851 static int build_i2c_fw_hdr(__u8 *header, struct device *dev) 852 { 853 __u8 *buffer; 854 int buffer_size; 855 int i; 856 int err; 857 __u8 cs = 0; 858 struct ti_i2c_desc *i2c_header; 859 struct ti_i2c_image_header *img_header; 860 struct ti_i2c_firmware_rec *firmware_rec; 861 const struct firmware *fw; 862 const char *fw_name = "edgeport/down3.bin"; 863 864 /* In order to update the I2C firmware we must change the type 2 record 865 * to type 0xF2. This will force the UMP to come up in Boot Mode. 866 * Then while in boot mode, the driver will download the latest 867 * firmware (padded to 15.5k) into the UMP ram. And finally when the 868 * device comes back up in download mode the driver will cause the new 869 * firmware to be copied from the UMP Ram to I2C and the firmware will 870 * update the record type from 0xf2 to 0x02. 871 */ 872 873 /* Allocate a 15.5k buffer + 2 bytes for version number 874 * (Firmware Record) */ 875 buffer_size = (((1024 * 16) - 512 ) + 876 sizeof(struct ti_i2c_firmware_rec)); 877 878 buffer = kmalloc(buffer_size, GFP_KERNEL); 879 if (!buffer) { 880 dev_err(dev, "%s - out of memory\n", __func__); 881 return -ENOMEM; 882 } 883 884 // Set entire image of 0xffs 885 memset(buffer, 0xff, buffer_size); 886 887 err = request_firmware(&fw, fw_name, dev); 888 if (err) { 889 printk(KERN_ERR "Failed to load image \"%s\" err %d\n", 890 fw_name, err); 891 kfree(buffer); 892 return err; 893 } 894 895 /* Save Download Version Number */ 896 OperationalMajorVersion = fw->data[0]; 897 OperationalMinorVersion = fw->data[1]; 898 OperationalBuildNumber = fw->data[2] | (fw->data[3] << 8); 899 900 /* Copy version number into firmware record */ 901 firmware_rec = (struct ti_i2c_firmware_rec *)buffer; 902 903 firmware_rec->Ver_Major = OperationalMajorVersion; 904 firmware_rec->Ver_Minor = OperationalMinorVersion; 905 906 /* Pointer to fw_down memory image */ 907 img_header = (struct ti_i2c_image_header *)&fw->data[4]; 908 909 memcpy(buffer + sizeof(struct ti_i2c_firmware_rec), 910 &fw->data[4 + sizeof(struct ti_i2c_image_header)], 911 le16_to_cpu(img_header->Length)); 912 913 release_firmware(fw); 914 915 for (i=0; i < buffer_size; i++) { 916 cs = (__u8)(cs + buffer[i]); 917 } 918 919 kfree(buffer); 920 921 /* Build new header */ 922 i2c_header = (struct ti_i2c_desc *)header; 923 firmware_rec = (struct ti_i2c_firmware_rec*)i2c_header->Data; 924 925 i2c_header->Type = I2C_DESC_TYPE_FIRMWARE_BLANK; 926 i2c_header->Size = (__u16)buffer_size; 927 i2c_header->CheckSum = cs; 928 firmware_rec->Ver_Major = OperationalMajorVersion; 929 firmware_rec->Ver_Minor = OperationalMinorVersion; 930 931 return 0; 932 } 933 934 /* Try to figure out what type of I2c we have */ 935 static int i2c_type_bootmode(struct edgeport_serial *serial) 936 { 937 int status; 938 __u8 data; 939 940 /* Try to read type 2 */ 941 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ, 942 DTK_ADDR_SPACE_I2C_TYPE_II, 0, &data, 0x01); 943 if (status) 944 dbg("%s - read 2 status error = %d", __func__, status); 945 else 946 dbg("%s - read 2 data = 0x%x", __func__, data); 947 if ((!status) && (data == UMP5152 || data == UMP3410)) { 948 dbg("%s - ROM_TYPE_II", __func__); 949 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 950 return 0; 951 } 952 953 /* Try to read type 3 */ 954 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ, 955 DTK_ADDR_SPACE_I2C_TYPE_III, 0, &data, 0x01); 956 if (status) 957 dbg("%s - read 3 status error = %d", __func__, status); 958 else 959 dbg("%s - read 2 data = 0x%x", __func__, data); 960 if ((!status) && (data == UMP5152 || data == UMP3410)) { 961 dbg("%s - ROM_TYPE_III", __func__); 962 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III; 963 return 0; 964 } 965 966 dbg("%s - Unknown", __func__); 967 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 968 return -ENODEV; 969 } 970 971 static int bulk_xfer(struct usb_serial *serial, void *buffer, 972 int length, int *num_sent) 973 { 974 int status; 975 976 status = usb_bulk_msg(serial->dev, 977 usb_sndbulkpipe(serial->dev, 978 serial->port[0]->bulk_out_endpointAddress), 979 buffer, length, num_sent, 1000); 980 return status; 981 } 982 983 /* Download given firmware image to the device (IN BOOT MODE) */ 984 static int download_code(struct edgeport_serial *serial, __u8 *image, 985 int image_length) 986 { 987 int status = 0; 988 int pos; 989 int transfer; 990 int done; 991 992 /* Transfer firmware image */ 993 for (pos = 0; pos < image_length; ) { 994 /* Read the next buffer from file */ 995 transfer = image_length - pos; 996 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE) 997 transfer = EDGE_FW_BULK_MAX_PACKET_SIZE; 998 999 /* Transfer data */ 1000 status = bulk_xfer(serial->serial, &image[pos], 1001 transfer, &done); 1002 if (status) 1003 break; 1004 /* Advance buffer pointer */ 1005 pos += done; 1006 } 1007 1008 return status; 1009 } 1010 1011 /* FIXME!!! */ 1012 static int config_boot_dev(struct usb_device *dev) 1013 { 1014 return 0; 1015 } 1016 1017 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc) 1018 { 1019 return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev); 1020 } 1021 1022 /** 1023 * DownloadTIFirmware - Download run-time operating firmware to the TI5052 1024 * 1025 * This routine downloads the main operating code into the TI5052, using the 1026 * boot code already burned into E2PROM or ROM. 1027 */ 1028 static int download_fw(struct edgeport_serial *serial) 1029 { 1030 struct device *dev = &serial->serial->dev->dev; 1031 int status = 0; 1032 int start_address; 1033 struct edge_ti_manuf_descriptor *ti_manuf_desc; 1034 struct usb_interface_descriptor *interface; 1035 int download_cur_ver; 1036 int download_new_ver; 1037 1038 /* This routine is entered by both the BOOT mode and the Download mode 1039 * We can determine which code is running by the reading the config 1040 * descriptor and if we have only one bulk pipe it is in boot mode 1041 */ 1042 serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP; 1043 1044 /* Default to type 2 i2c */ 1045 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 1046 1047 status = choose_config(serial->serial->dev); 1048 if (status) 1049 return status; 1050 1051 interface = &serial->serial->interface->cur_altsetting->desc; 1052 if (!interface) { 1053 dev_err(dev, "%s - no interface set, error!\n", __func__); 1054 return -ENODEV; 1055 } 1056 1057 /* 1058 * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING 1059 * if we have more than one endpoint we are definitely in download 1060 * mode 1061 */ 1062 if (interface->bNumEndpoints > 1) 1063 serial->product_info.TiMode = TI_MODE_DOWNLOAD; 1064 else 1065 /* Otherwise we will remain in configuring mode */ 1066 serial->product_info.TiMode = TI_MODE_CONFIGURING; 1067 1068 /********************************************************************/ 1069 /* Download Mode */ 1070 /********************************************************************/ 1071 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) { 1072 struct ti_i2c_desc *rom_desc; 1073 1074 dbg("%s - RUNNING IN DOWNLOAD MODE", __func__); 1075 1076 status = check_i2c_image(serial); 1077 if (status) { 1078 dbg("%s - DOWNLOAD MODE -- BAD I2C", __func__); 1079 return status; 1080 } 1081 1082 /* Validate Hardware version number 1083 * Read Manufacturing Descriptor from TI Based Edgeport 1084 */ 1085 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL); 1086 if (!ti_manuf_desc) { 1087 dev_err(dev, "%s - out of memory.\n", __func__); 1088 return -ENOMEM; 1089 } 1090 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc); 1091 if (status) { 1092 kfree(ti_manuf_desc); 1093 return status; 1094 } 1095 1096 /* Check version number of ION descriptor */ 1097 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) { 1098 dbg("%s - Wrong CPU Rev %d (Must be 2)", 1099 __func__, ti_cpu_rev(ti_manuf_desc)); 1100 kfree(ti_manuf_desc); 1101 return -EINVAL; 1102 } 1103 1104 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 1105 if (!rom_desc) { 1106 dev_err(dev, "%s - out of memory.\n", __func__); 1107 kfree(ti_manuf_desc); 1108 return -ENOMEM; 1109 } 1110 1111 /* Search for type 2 record (firmware record) */ 1112 start_address = get_descriptor_addr(serial, 1113 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc); 1114 if (start_address != 0) { 1115 struct ti_i2c_firmware_rec *firmware_version; 1116 __u8 record; 1117 1118 dbg("%s - Found Type FIRMWARE (Type 2) record", 1119 __func__); 1120 1121 firmware_version = kmalloc(sizeof(*firmware_version), 1122 GFP_KERNEL); 1123 if (!firmware_version) { 1124 dev_err(dev, "%s - out of memory.\n", __func__); 1125 kfree(rom_desc); 1126 kfree(ti_manuf_desc); 1127 return -ENOMEM; 1128 } 1129 1130 /* Validate version number 1131 * Read the descriptor data 1132 */ 1133 status = read_rom(serial, start_address + 1134 sizeof(struct ti_i2c_desc), 1135 sizeof(struct ti_i2c_firmware_rec), 1136 (__u8 *)firmware_version); 1137 if (status) { 1138 kfree(firmware_version); 1139 kfree(rom_desc); 1140 kfree(ti_manuf_desc); 1141 return status; 1142 } 1143 1144 /* Check version number of download with current 1145 version in I2c */ 1146 download_cur_ver = (firmware_version->Ver_Major << 8) + 1147 (firmware_version->Ver_Minor); 1148 download_new_ver = (OperationalMajorVersion << 8) + 1149 (OperationalMinorVersion); 1150 1151 dbg("%s - >> FW Versions Device %d.%d Driver %d.%d", 1152 __func__, 1153 firmware_version->Ver_Major, 1154 firmware_version->Ver_Minor, 1155 OperationalMajorVersion, 1156 OperationalMinorVersion); 1157 1158 /* Check if we have an old version in the I2C and 1159 update if necessary */ 1160 if (download_cur_ver != download_new_ver) { 1161 dbg("%s - Update I2C dld from %d.%d to %d.%d", 1162 __func__, 1163 firmware_version->Ver_Major, 1164 firmware_version->Ver_Minor, 1165 OperationalMajorVersion, 1166 OperationalMinorVersion); 1167 1168 /* In order to update the I2C firmware we must 1169 * change the type 2 record to type 0xF2. This 1170 * will force the UMP to come up in Boot Mode. 1171 * Then while in boot mode, the driver will 1172 * download the latest firmware (padded to 1173 * 15.5k) into the UMP ram. Finally when the 1174 * device comes back up in download mode the 1175 * driver will cause the new firmware to be 1176 * copied from the UMP Ram to I2C and the 1177 * firmware will update the record type from 1178 * 0xf2 to 0x02. 1179 */ 1180 record = I2C_DESC_TYPE_FIRMWARE_BLANK; 1181 1182 /* Change the I2C Firmware record type to 1183 0xf2 to trigger an update */ 1184 status = write_rom(serial, start_address, 1185 sizeof(record), &record); 1186 if (status) { 1187 kfree(firmware_version); 1188 kfree(rom_desc); 1189 kfree(ti_manuf_desc); 1190 return status; 1191 } 1192 1193 /* verify the write -- must do this in order 1194 * for write to complete before we do the 1195 * hardware reset 1196 */ 1197 status = read_rom(serial, 1198 start_address, 1199 sizeof(record), 1200 &record); 1201 if (status) { 1202 kfree(firmware_version); 1203 kfree(rom_desc); 1204 kfree(ti_manuf_desc); 1205 return status; 1206 } 1207 1208 if (record != I2C_DESC_TYPE_FIRMWARE_BLANK) { 1209 dev_err(dev, 1210 "%s - error resetting device\n", 1211 __func__); 1212 kfree(firmware_version); 1213 kfree(rom_desc); 1214 kfree(ti_manuf_desc); 1215 return -ENODEV; 1216 } 1217 1218 dbg("%s - HARDWARE RESET", __func__); 1219 1220 /* Reset UMP -- Back to BOOT MODE */ 1221 status = ti_vsend_sync(serial->serial->dev, 1222 UMPC_HARDWARE_RESET, 1223 0, 0, NULL, 0); 1224 1225 dbg("%s - HARDWARE RESET return %d", 1226 __func__, status); 1227 1228 /* return an error on purpose. */ 1229 kfree(firmware_version); 1230 kfree(rom_desc); 1231 kfree(ti_manuf_desc); 1232 return -ENODEV; 1233 } 1234 kfree(firmware_version); 1235 } 1236 /* Search for type 0xF2 record (firmware blank record) */ 1237 else if ((start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) { 1238 #define HEADER_SIZE (sizeof(struct ti_i2c_desc) + \ 1239 sizeof(struct ti_i2c_firmware_rec)) 1240 __u8 *header; 1241 __u8 *vheader; 1242 1243 header = kmalloc(HEADER_SIZE, GFP_KERNEL); 1244 if (!header) { 1245 dev_err(dev, "%s - out of memory.\n", __func__); 1246 kfree(rom_desc); 1247 kfree(ti_manuf_desc); 1248 return -ENOMEM; 1249 } 1250 1251 vheader = kmalloc(HEADER_SIZE, GFP_KERNEL); 1252 if (!vheader) { 1253 dev_err(dev, "%s - out of memory.\n", __func__); 1254 kfree(header); 1255 kfree(rom_desc); 1256 kfree(ti_manuf_desc); 1257 return -ENOMEM; 1258 } 1259 1260 dbg("%s - Found Type BLANK FIRMWARE (Type F2) record", 1261 __func__); 1262 1263 /* 1264 * In order to update the I2C firmware we must change 1265 * the type 2 record to type 0xF2. This will force the 1266 * UMP to come up in Boot Mode. Then while in boot 1267 * mode, the driver will download the latest firmware 1268 * (padded to 15.5k) into the UMP ram. Finally when the 1269 * device comes back up in download mode the driver 1270 * will cause the new firmware to be copied from the 1271 * UMP Ram to I2C and the firmware will update the 1272 * record type from 0xf2 to 0x02. 1273 */ 1274 status = build_i2c_fw_hdr(header, dev); 1275 if (status) { 1276 kfree(vheader); 1277 kfree(header); 1278 kfree(rom_desc); 1279 kfree(ti_manuf_desc); 1280 return status; 1281 } 1282 1283 /* Update I2C with type 0xf2 record with correct 1284 size and checksum */ 1285 status = write_rom(serial, 1286 start_address, 1287 HEADER_SIZE, 1288 header); 1289 if (status) { 1290 kfree(vheader); 1291 kfree(header); 1292 kfree(rom_desc); 1293 kfree(ti_manuf_desc); 1294 return status; 1295 } 1296 1297 /* verify the write -- must do this in order for 1298 write to complete before we do the hardware reset */ 1299 status = read_rom(serial, start_address, 1300 HEADER_SIZE, vheader); 1301 1302 if (status) { 1303 dbg("%s - can't read header back", __func__); 1304 kfree(vheader); 1305 kfree(header); 1306 kfree(rom_desc); 1307 kfree(ti_manuf_desc); 1308 return status; 1309 } 1310 if (memcmp(vheader, header, HEADER_SIZE)) { 1311 dbg("%s - write download record failed", 1312 __func__); 1313 kfree(vheader); 1314 kfree(header); 1315 kfree(rom_desc); 1316 kfree(ti_manuf_desc); 1317 return status; 1318 } 1319 1320 kfree(vheader); 1321 kfree(header); 1322 1323 dbg("%s - Start firmware update", __func__); 1324 1325 /* Tell firmware to copy download image into I2C */ 1326 status = ti_vsend_sync(serial->serial->dev, 1327 UMPC_COPY_DNLD_TO_I2C, 0, 0, NULL, 0); 1328 1329 dbg("%s - Update complete 0x%x", __func__, status); 1330 if (status) { 1331 dev_err(dev, 1332 "%s - UMPC_COPY_DNLD_TO_I2C failed\n", 1333 __func__); 1334 kfree(rom_desc); 1335 kfree(ti_manuf_desc); 1336 return status; 1337 } 1338 } 1339 1340 // The device is running the download code 1341 kfree(rom_desc); 1342 kfree(ti_manuf_desc); 1343 return 0; 1344 } 1345 1346 /********************************************************************/ 1347 /* Boot Mode */ 1348 /********************************************************************/ 1349 dbg("%s - RUNNING IN BOOT MODE", __func__); 1350 1351 /* Configure the TI device so we can use the BULK pipes for download */ 1352 status = config_boot_dev(serial->serial->dev); 1353 if (status) 1354 return status; 1355 1356 if (le16_to_cpu(serial->serial->dev->descriptor.idVendor) 1357 != USB_VENDOR_ID_ION) { 1358 dbg("%s - VID = 0x%x", __func__, 1359 le16_to_cpu(serial->serial->dev->descriptor.idVendor)); 1360 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 1361 goto stayinbootmode; 1362 } 1363 1364 /* We have an ION device (I2c Must be programmed) 1365 Determine I2C image type */ 1366 if (i2c_type_bootmode(serial)) 1367 goto stayinbootmode; 1368 1369 /* Check for ION Vendor ID and that the I2C is valid */ 1370 if (!check_i2c_image(serial)) { 1371 struct ti_i2c_image_header *header; 1372 int i; 1373 __u8 cs = 0; 1374 __u8 *buffer; 1375 int buffer_size; 1376 int err; 1377 const struct firmware *fw; 1378 const char *fw_name = "edgeport/down3.bin"; 1379 1380 /* Validate Hardware version number 1381 * Read Manufacturing Descriptor from TI Based Edgeport 1382 */ 1383 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL); 1384 if (!ti_manuf_desc) { 1385 dev_err(dev, "%s - out of memory.\n", __func__); 1386 return -ENOMEM; 1387 } 1388 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc); 1389 if (status) { 1390 kfree(ti_manuf_desc); 1391 goto stayinbootmode; 1392 } 1393 1394 /* Check for version 2 */ 1395 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) { 1396 dbg("%s - Wrong CPU Rev %d (Must be 2)", 1397 __func__, ti_cpu_rev(ti_manuf_desc)); 1398 kfree(ti_manuf_desc); 1399 goto stayinbootmode; 1400 } 1401 1402 kfree(ti_manuf_desc); 1403 1404 /* 1405 * In order to update the I2C firmware we must change the type 1406 * 2 record to type 0xF2. This will force the UMP to come up 1407 * in Boot Mode. Then while in boot mode, the driver will 1408 * download the latest firmware (padded to 15.5k) into the 1409 * UMP ram. Finally when the device comes back up in download 1410 * mode the driver will cause the new firmware to be copied 1411 * from the UMP Ram to I2C and the firmware will update the 1412 * record type from 0xf2 to 0x02. 1413 * 1414 * Do we really have to copy the whole firmware image, 1415 * or could we do this in place! 1416 */ 1417 1418 /* Allocate a 15.5k buffer + 3 byte header */ 1419 buffer_size = (((1024 * 16) - 512) + 1420 sizeof(struct ti_i2c_image_header)); 1421 buffer = kmalloc(buffer_size, GFP_KERNEL); 1422 if (!buffer) { 1423 dev_err(dev, "%s - out of memory\n", __func__); 1424 return -ENOMEM; 1425 } 1426 1427 /* Initialize the buffer to 0xff (pad the buffer) */ 1428 memset(buffer, 0xff, buffer_size); 1429 1430 err = request_firmware(&fw, fw_name, dev); 1431 if (err) { 1432 printk(KERN_ERR "Failed to load image \"%s\" err %d\n", 1433 fw_name, err); 1434 kfree(buffer); 1435 return err; 1436 } 1437 memcpy(buffer, &fw->data[4], fw->size - 4); 1438 release_firmware(fw); 1439 1440 for (i = sizeof(struct ti_i2c_image_header); 1441 i < buffer_size; i++) { 1442 cs = (__u8)(cs + buffer[i]); 1443 } 1444 1445 header = (struct ti_i2c_image_header *)buffer; 1446 1447 /* update length and checksum after padding */ 1448 header->Length = cpu_to_le16((__u16)(buffer_size - 1449 sizeof(struct ti_i2c_image_header))); 1450 header->CheckSum = cs; 1451 1452 /* Download the operational code */ 1453 dbg("%s - Downloading operational code image (TI UMP)", 1454 __func__); 1455 status = download_code(serial, buffer, buffer_size); 1456 1457 kfree(buffer); 1458 1459 if (status) { 1460 dbg("%s - Error downloading operational code image", 1461 __func__); 1462 return status; 1463 } 1464 1465 /* Device will reboot */ 1466 serial->product_info.TiMode = TI_MODE_TRANSITIONING; 1467 1468 dbg("%s - Download successful -- Device rebooting...", 1469 __func__); 1470 1471 /* return an error on purpose */ 1472 return -ENODEV; 1473 } 1474 1475 stayinbootmode: 1476 /* Eprom is invalid or blank stay in boot mode */ 1477 dbg("%s - STAYING IN BOOT MODE", __func__); 1478 serial->product_info.TiMode = TI_MODE_BOOT; 1479 1480 return 0; 1481 } 1482 1483 1484 static int ti_do_config(struct edgeport_port *port, int feature, int on) 1485 { 1486 int port_number = port->port->number - port->port->serial->minor; 1487 on = !!on; /* 1 or 0 not bitmask */ 1488 return send_cmd(port->port->serial->dev, 1489 feature, (__u8)(UMPM_UART1_PORT + port_number), 1490 on, NULL, 0); 1491 } 1492 1493 1494 static int restore_mcr(struct edgeport_port *port, __u8 mcr) 1495 { 1496 int status = 0; 1497 1498 dbg("%s - %x", __func__, mcr); 1499 1500 status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR); 1501 if (status) 1502 return status; 1503 status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS); 1504 if (status) 1505 return status; 1506 return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK); 1507 } 1508 1509 /* Convert TI LSR to standard UART flags */ 1510 static __u8 map_line_status(__u8 ti_lsr) 1511 { 1512 __u8 lsr = 0; 1513 1514 #define MAP_FLAG(flagUmp, flagUart) \ 1515 if (ti_lsr & flagUmp) \ 1516 lsr |= flagUart; 1517 1518 MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR) /* overrun */ 1519 MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR) /* parity error */ 1520 MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR) /* framing error */ 1521 MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK) /* break detected */ 1522 MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL) /* rx data available */ 1523 MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY) /* tx hold reg empty */ 1524 1525 #undef MAP_FLAG 1526 1527 return lsr; 1528 } 1529 1530 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr) 1531 { 1532 struct async_icount *icount; 1533 struct tty_struct *tty; 1534 1535 dbg("%s - %02x", __func__, msr); 1536 1537 if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | 1538 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 1539 icount = &edge_port->icount; 1540 1541 /* update input line counters */ 1542 if (msr & EDGEPORT_MSR_DELTA_CTS) 1543 icount->cts++; 1544 if (msr & EDGEPORT_MSR_DELTA_DSR) 1545 icount->dsr++; 1546 if (msr & EDGEPORT_MSR_DELTA_CD) 1547 icount->dcd++; 1548 if (msr & EDGEPORT_MSR_DELTA_RI) 1549 icount->rng++; 1550 wake_up_interruptible(&edge_port->delta_msr_wait); 1551 } 1552 1553 /* Save the new modem status */ 1554 edge_port->shadow_msr = msr & 0xf0; 1555 1556 tty = tty_port_tty_get(&edge_port->port->port); 1557 /* handle CTS flow control */ 1558 if (tty && C_CRTSCTS(tty)) { 1559 if (msr & EDGEPORT_MSR_CTS) { 1560 tty->hw_stopped = 0; 1561 tty_wakeup(tty); 1562 } else { 1563 tty->hw_stopped = 1; 1564 } 1565 } 1566 tty_kref_put(tty); 1567 1568 return; 1569 } 1570 1571 static 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 struct tty_struct *tty; 1578 1579 dbg("%s - %02x", __func__, new_lsr); 1580 1581 edge_port->shadow_lsr = lsr; 1582 1583 if (new_lsr & LSR_BREAK) 1584 /* 1585 * Parity and Framing errors only count if they 1586 * occur exclusive of a break being received. 1587 */ 1588 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 1589 1590 /* Place LSR data byte into Rx buffer */ 1591 if (lsr_data) { 1592 tty = tty_port_tty_get(&edge_port->port->port); 1593 if (tty) { 1594 edge_tty_recv(&edge_port->port->dev, tty, &data, 1); 1595 tty_kref_put(tty); 1596 } 1597 } 1598 1599 /* update input line counters */ 1600 icount = &edge_port->icount; 1601 if (new_lsr & LSR_BREAK) 1602 icount->brk++; 1603 if (new_lsr & LSR_OVER_ERR) 1604 icount->overrun++; 1605 if (new_lsr & LSR_PAR_ERR) 1606 icount->parity++; 1607 if (new_lsr & LSR_FRM_ERR) 1608 icount->frame++; 1609 } 1610 1611 1612 static void edge_interrupt_callback(struct urb *urb) 1613 { 1614 struct edgeport_serial *edge_serial = urb->context; 1615 struct usb_serial_port *port; 1616 struct edgeport_port *edge_port; 1617 unsigned char *data = urb->transfer_buffer; 1618 int length = urb->actual_length; 1619 int port_number; 1620 int function; 1621 int retval; 1622 __u8 lsr; 1623 __u8 msr; 1624 int status = urb->status; 1625 1626 dbg("%s", __func__); 1627 1628 switch (status) { 1629 case 0: 1630 /* success */ 1631 break; 1632 case -ECONNRESET: 1633 case -ENOENT: 1634 case -ESHUTDOWN: 1635 /* this urb is terminated, clean up */ 1636 dbg("%s - urb shutting down with status: %d", 1637 __func__, status); 1638 return; 1639 default: 1640 dev_err(&urb->dev->dev, "%s - nonzero urb status received: " 1641 "%d\n", __func__, status); 1642 goto exit; 1643 } 1644 1645 if (!length) { 1646 dbg("%s - no data in urb", __func__); 1647 goto exit; 1648 } 1649 1650 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, 1651 __func__, length, data); 1652 1653 if (length != 2) { 1654 dbg("%s - expecting packet of size 2, got %d", 1655 __func__, length); 1656 goto exit; 1657 } 1658 1659 port_number = TIUMP_GET_PORT_FROM_CODE(data[0]); 1660 function = TIUMP_GET_FUNC_FROM_CODE(data[0]); 1661 dbg("%s - port_number %d, function %d, info 0x%x", 1662 __func__, port_number, function, data[1]); 1663 port = edge_serial->serial->port[port_number]; 1664 edge_port = usb_get_serial_port_data(port); 1665 if (!edge_port) { 1666 dbg("%s - edge_port not found", __func__); 1667 return; 1668 } 1669 switch (function) { 1670 case TIUMP_INTERRUPT_CODE_LSR: 1671 lsr = map_line_status(data[1]); 1672 if (lsr & UMP_UART_LSR_DATA_MASK) { 1673 /* Save the LSR event for bulk read 1674 completion routine */ 1675 dbg("%s - LSR Event Port %u LSR Status = %02x", 1676 __func__, port_number, lsr); 1677 edge_port->lsr_event = 1; 1678 edge_port->lsr_mask = lsr; 1679 } else { 1680 dbg("%s - ===== Port %d LSR Status = %02x ======", 1681 __func__, port_number, lsr); 1682 handle_new_lsr(edge_port, 0, lsr, 0); 1683 } 1684 break; 1685 1686 case TIUMP_INTERRUPT_CODE_MSR: /* MSR */ 1687 /* Copy MSR from UMP */ 1688 msr = data[1]; 1689 dbg("%s - ===== Port %u MSR Status = %02x ======\n", 1690 __func__, port_number, msr); 1691 handle_new_msr(edge_port, msr); 1692 break; 1693 1694 default: 1695 dev_err(&urb->dev->dev, 1696 "%s - Unknown Interrupt code from UMP %x\n", 1697 __func__, data[1]); 1698 break; 1699 1700 } 1701 1702 exit: 1703 retval = usb_submit_urb(urb, GFP_ATOMIC); 1704 if (retval) 1705 dev_err(&urb->dev->dev, 1706 "%s - usb_submit_urb failed with result %d\n", 1707 __func__, retval); 1708 } 1709 1710 static void edge_bulk_in_callback(struct urb *urb) 1711 { 1712 struct edgeport_port *edge_port = urb->context; 1713 unsigned char *data = urb->transfer_buffer; 1714 struct tty_struct *tty; 1715 int retval = 0; 1716 int port_number; 1717 int status = urb->status; 1718 1719 dbg("%s", __func__); 1720 1721 switch (status) { 1722 case 0: 1723 /* success */ 1724 break; 1725 case -ECONNRESET: 1726 case -ENOENT: 1727 case -ESHUTDOWN: 1728 /* this urb is terminated, clean up */ 1729 dbg("%s - urb shutting down with status: %d", 1730 __func__, status); 1731 return; 1732 default: 1733 dev_err(&urb->dev->dev, 1734 "%s - nonzero read bulk status received: %d\n", 1735 __func__, status); 1736 } 1737 1738 if (status == -EPIPE) 1739 goto exit; 1740 1741 if (status) { 1742 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__); 1743 return; 1744 } 1745 1746 port_number = edge_port->port->number - edge_port->port->serial->minor; 1747 1748 if (edge_port->lsr_event) { 1749 edge_port->lsr_event = 0; 1750 dbg("%s ===== Port %u LSR Status = %02x, Data = %02x ======", 1751 __func__, port_number, edge_port->lsr_mask, *data); 1752 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data); 1753 /* Adjust buffer length/pointer */ 1754 --urb->actual_length; 1755 ++data; 1756 } 1757 1758 tty = tty_port_tty_get(&edge_port->port->port); 1759 if (tty && urb->actual_length) { 1760 usb_serial_debug_data(debug, &edge_port->port->dev, 1761 __func__, urb->actual_length, data); 1762 if (edge_port->close_pending) 1763 dbg("%s - close pending, dropping data on the floor", 1764 __func__); 1765 else 1766 edge_tty_recv(&edge_port->port->dev, tty, data, 1767 urb->actual_length); 1768 edge_port->icount.rx += urb->actual_length; 1769 } 1770 tty_kref_put(tty); 1771 1772 exit: 1773 /* continue read unless stopped */ 1774 spin_lock(&edge_port->ep_lock); 1775 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) { 1776 urb->dev = edge_port->port->serial->dev; 1777 retval = usb_submit_urb(urb, GFP_ATOMIC); 1778 } else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) { 1779 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED; 1780 } 1781 spin_unlock(&edge_port->ep_lock); 1782 if (retval) 1783 dev_err(&urb->dev->dev, 1784 "%s - usb_submit_urb failed with result %d\n", 1785 __func__, retval); 1786 } 1787 1788 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, 1789 unsigned char *data, int length) 1790 { 1791 int queued; 1792 1793 tty_buffer_request_room(tty, length); 1794 queued = tty_insert_flip_string(tty, data, length); 1795 if (queued < length) 1796 dev_err(dev, "%s - dropping data, %d bytes lost\n", 1797 __func__, length - queued); 1798 tty_flip_buffer_push(tty); 1799 } 1800 1801 static void edge_bulk_out_callback(struct urb *urb) 1802 { 1803 struct usb_serial_port *port = urb->context; 1804 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1805 int status = urb->status; 1806 struct tty_struct *tty; 1807 1808 dbg("%s - port %d", __func__, port->number); 1809 1810 edge_port->ep_write_urb_in_use = 0; 1811 1812 switch (status) { 1813 case 0: 1814 /* success */ 1815 break; 1816 case -ECONNRESET: 1817 case -ENOENT: 1818 case -ESHUTDOWN: 1819 /* this urb is terminated, clean up */ 1820 dbg("%s - urb shutting down with status: %d", 1821 __func__, status); 1822 return; 1823 default: 1824 dev_err(&urb->dev->dev, "%s - nonzero write bulk status " 1825 "received: %d\n", __func__, status); 1826 } 1827 1828 /* send any buffered data */ 1829 tty = tty_port_tty_get(&port->port); 1830 edge_send(tty); 1831 tty_kref_put(tty); 1832 } 1833 1834 static int edge_open(struct tty_struct *tty, 1835 struct usb_serial_port *port, struct file *filp) 1836 { 1837 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1838 struct edgeport_serial *edge_serial; 1839 struct usb_device *dev; 1840 struct urb *urb; 1841 int port_number; 1842 int status; 1843 u16 open_settings; 1844 u8 transaction_timeout; 1845 1846 dbg("%s - port %d", __func__, port->number); 1847 1848 if (edge_port == NULL) 1849 return -ENODEV; 1850 1851 port_number = port->number - port->serial->minor; 1852 switch (port_number) { 1853 case 0: 1854 edge_port->uart_base = UMPMEM_BASE_UART1; 1855 edge_port->dma_address = UMPD_OEDB1_ADDRESS; 1856 break; 1857 case 1: 1858 edge_port->uart_base = UMPMEM_BASE_UART2; 1859 edge_port->dma_address = UMPD_OEDB2_ADDRESS; 1860 break; 1861 default: 1862 dev_err(&port->dev, "Unknown port number!!!\n"); 1863 return -ENODEV; 1864 } 1865 1866 dbg("%s - port_number = %d, uart_base = %04x, dma_address = %04x", 1867 __func__, port_number, edge_port->uart_base, 1868 edge_port->dma_address); 1869 1870 dev = port->serial->dev; 1871 1872 memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount)); 1873 init_waitqueue_head(&edge_port->delta_msr_wait); 1874 1875 /* turn off loopback */ 1876 status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0); 1877 if (status) { 1878 dev_err(&port->dev, 1879 "%s - cannot send clear loopback command, %d\n", 1880 __func__, status); 1881 return status; 1882 } 1883 1884 /* set up the port settings */ 1885 if (tty) 1886 edge_set_termios(tty, port, tty->termios); 1887 1888 /* open up the port */ 1889 1890 /* milliseconds to timeout for DMA transfer */ 1891 transaction_timeout = 2; 1892 1893 edge_port->ump_read_timeout = 1894 max(20, ((transaction_timeout * 3) / 2)); 1895 1896 /* milliseconds to timeout for DMA transfer */ 1897 open_settings = (u8)(UMP_DMA_MODE_CONTINOUS | 1898 UMP_PIPE_TRANS_TIMEOUT_ENA | 1899 (transaction_timeout << 2)); 1900 1901 dbg("%s - Sending UMPC_OPEN_PORT", __func__); 1902 1903 /* Tell TI to open and start the port */ 1904 status = send_cmd(dev, UMPC_OPEN_PORT, 1905 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0); 1906 if (status) { 1907 dev_err(&port->dev, "%s - cannot send open command, %d\n", 1908 __func__, status); 1909 return status; 1910 } 1911 1912 /* Start the DMA? */ 1913 status = send_cmd(dev, UMPC_START_PORT, 1914 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0); 1915 if (status) { 1916 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n", 1917 __func__, status); 1918 return status; 1919 } 1920 1921 /* Clear TX and RX buffers in UMP */ 1922 status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN); 1923 if (status) { 1924 dev_err(&port->dev, 1925 "%s - cannot send clear buffers command, %d\n", 1926 __func__, status); 1927 return status; 1928 } 1929 1930 /* Read Initial MSR */ 1931 status = ti_vread_sync(dev, UMPC_READ_MSR, 0, 1932 (__u16)(UMPM_UART1_PORT + port_number), 1933 &edge_port->shadow_msr, 1); 1934 if (status) { 1935 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n", 1936 __func__, status); 1937 return status; 1938 } 1939 1940 dbg("ShadowMSR 0x%X", edge_port->shadow_msr); 1941 1942 /* Set Initial MCR */ 1943 edge_port->shadow_mcr = MCR_RTS | MCR_DTR; 1944 dbg("ShadowMCR 0x%X", edge_port->shadow_mcr); 1945 1946 edge_serial = edge_port->edge_serial; 1947 if (mutex_lock_interruptible(&edge_serial->es_lock)) 1948 return -ERESTARTSYS; 1949 if (edge_serial->num_ports_open == 0) { 1950 /* we are the first port to open, post the interrupt urb */ 1951 urb = edge_serial->serial->port[0]->interrupt_in_urb; 1952 if (!urb) { 1953 dev_err(&port->dev, 1954 "%s - no interrupt urb present, exiting\n", 1955 __func__); 1956 status = -EINVAL; 1957 goto release_es_lock; 1958 } 1959 urb->complete = edge_interrupt_callback; 1960 urb->context = edge_serial; 1961 urb->dev = dev; 1962 status = usb_submit_urb(urb, GFP_KERNEL); 1963 if (status) { 1964 dev_err(&port->dev, 1965 "%s - usb_submit_urb failed with value %d\n", 1966 __func__, status); 1967 goto release_es_lock; 1968 } 1969 } 1970 1971 /* 1972 * reset the data toggle on the bulk endpoints to work around bug in 1973 * host controllers where things get out of sync some times 1974 */ 1975 usb_clear_halt(dev, port->write_urb->pipe); 1976 usb_clear_halt(dev, port->read_urb->pipe); 1977 1978 /* start up our bulk read urb */ 1979 urb = port->read_urb; 1980 if (!urb) { 1981 dev_err(&port->dev, "%s - no read urb present, exiting\n", 1982 __func__); 1983 status = -EINVAL; 1984 goto unlink_int_urb; 1985 } 1986 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING; 1987 urb->complete = edge_bulk_in_callback; 1988 urb->context = edge_port; 1989 urb->dev = dev; 1990 status = usb_submit_urb(urb, GFP_KERNEL); 1991 if (status) { 1992 dev_err(&port->dev, 1993 "%s - read bulk usb_submit_urb failed with value %d\n", 1994 __func__, status); 1995 goto unlink_int_urb; 1996 } 1997 1998 ++edge_serial->num_ports_open; 1999 2000 dbg("%s - exited", __func__); 2001 2002 goto release_es_lock; 2003 2004 unlink_int_urb: 2005 if (edge_port->edge_serial->num_ports_open == 0) 2006 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 2007 release_es_lock: 2008 mutex_unlock(&edge_serial->es_lock); 2009 return status; 2010 } 2011 2012 static void edge_close(struct usb_serial_port *port) 2013 { 2014 struct edgeport_serial *edge_serial; 2015 struct edgeport_port *edge_port; 2016 int port_number; 2017 int status; 2018 2019 dbg("%s - port %d", __func__, port->number); 2020 2021 edge_serial = usb_get_serial_data(port->serial); 2022 edge_port = usb_get_serial_port_data(port); 2023 if (edge_serial == NULL || edge_port == NULL) 2024 return; 2025 2026 /* The bulkreadcompletion routine will check 2027 * this flag and dump add read data */ 2028 edge_port->close_pending = 1; 2029 2030 /* chase the port close and flush */ 2031 chase_port(edge_port, (HZ * closing_wait) / 100, 1); 2032 2033 usb_kill_urb(port->read_urb); 2034 usb_kill_urb(port->write_urb); 2035 edge_port->ep_write_urb_in_use = 0; 2036 2037 /* assuming we can still talk to the device, 2038 * send a close port command to it */ 2039 dbg("%s - send umpc_close_port", __func__); 2040 port_number = port->number - port->serial->minor; 2041 status = send_cmd(port->serial->dev, 2042 UMPC_CLOSE_PORT, 2043 (__u8)(UMPM_UART1_PORT + port_number), 2044 0, 2045 NULL, 2046 0); 2047 mutex_lock(&edge_serial->es_lock); 2048 --edge_port->edge_serial->num_ports_open; 2049 if (edge_port->edge_serial->num_ports_open <= 0) { 2050 /* last port is now closed, let's shut down our interrupt urb */ 2051 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 2052 edge_port->edge_serial->num_ports_open = 0; 2053 } 2054 mutex_unlock(&edge_serial->es_lock); 2055 edge_port->close_pending = 0; 2056 2057 dbg("%s - exited", __func__); 2058 } 2059 2060 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 2061 const unsigned char *data, int count) 2062 { 2063 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2064 unsigned long flags; 2065 2066 dbg("%s - port %d", __func__, port->number); 2067 2068 if (count == 0) { 2069 dbg("%s - write request of 0 bytes", __func__); 2070 return 0; 2071 } 2072 2073 if (edge_port == NULL) 2074 return -ENODEV; 2075 if (edge_port->close_pending == 1) 2076 return -ENODEV; 2077 2078 spin_lock_irqsave(&edge_port->ep_lock, flags); 2079 count = edge_buf_put(edge_port->ep_out_buf, data, count); 2080 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2081 2082 edge_send(tty); 2083 2084 return count; 2085 } 2086 2087 static void edge_send(struct tty_struct *tty) 2088 { 2089 struct usb_serial_port *port = tty->driver_data; 2090 int count, result; 2091 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2092 unsigned long flags; 2093 2094 2095 dbg("%s - port %d", __func__, port->number); 2096 2097 spin_lock_irqsave(&edge_port->ep_lock, flags); 2098 2099 if (edge_port->ep_write_urb_in_use) { 2100 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2101 return; 2102 } 2103 2104 count = edge_buf_get(edge_port->ep_out_buf, 2105 port->write_urb->transfer_buffer, 2106 port->bulk_out_size); 2107 2108 if (count == 0) { 2109 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2110 return; 2111 } 2112 2113 edge_port->ep_write_urb_in_use = 1; 2114 2115 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2116 2117 usb_serial_debug_data(debug, &port->dev, __func__, count, 2118 port->write_urb->transfer_buffer); 2119 2120 /* set up our urb */ 2121 usb_fill_bulk_urb(port->write_urb, port->serial->dev, 2122 usb_sndbulkpipe(port->serial->dev, 2123 port->bulk_out_endpointAddress), 2124 port->write_urb->transfer_buffer, count, 2125 edge_bulk_out_callback, 2126 port); 2127 2128 /* send the data out the bulk port */ 2129 result = usb_submit_urb(port->write_urb, GFP_ATOMIC); 2130 if (result) { 2131 dev_err(&port->dev, 2132 "%s - failed submitting write urb, error %d\n", 2133 __func__, result); 2134 edge_port->ep_write_urb_in_use = 0; 2135 /* TODO: reschedule edge_send */ 2136 } else 2137 edge_port->icount.tx += count; 2138 2139 /* wakeup any process waiting for writes to complete */ 2140 /* there is now more room in the buffer for new writes */ 2141 if (tty) 2142 tty_wakeup(tty); 2143 } 2144 2145 static int edge_write_room(struct tty_struct *tty) 2146 { 2147 struct usb_serial_port *port = tty->driver_data; 2148 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2149 int room = 0; 2150 unsigned long flags; 2151 2152 dbg("%s - port %d", __func__, port->number); 2153 2154 if (edge_port == NULL) 2155 return 0; 2156 if (edge_port->close_pending == 1) 2157 return 0; 2158 2159 spin_lock_irqsave(&edge_port->ep_lock, flags); 2160 room = edge_buf_space_avail(edge_port->ep_out_buf); 2161 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2162 2163 dbg("%s - returns %d", __func__, room); 2164 return room; 2165 } 2166 2167 static int edge_chars_in_buffer(struct tty_struct *tty) 2168 { 2169 struct usb_serial_port *port = tty->driver_data; 2170 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2171 int chars = 0; 2172 unsigned long flags; 2173 2174 dbg("%s - port %d", __func__, port->number); 2175 2176 if (edge_port == NULL) 2177 return 0; 2178 if (edge_port->close_pending == 1) 2179 return 0; 2180 2181 spin_lock_irqsave(&edge_port->ep_lock, flags); 2182 chars = edge_buf_data_avail(edge_port->ep_out_buf); 2183 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2184 2185 dbg("%s - returns %d", __func__, chars); 2186 return chars; 2187 } 2188 2189 static void edge_throttle(struct tty_struct *tty) 2190 { 2191 struct usb_serial_port *port = tty->driver_data; 2192 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2193 int status; 2194 2195 dbg("%s - port %d", __func__, port->number); 2196 2197 if (edge_port == NULL) 2198 return; 2199 2200 /* if we are implementing XON/XOFF, send the stop character */ 2201 if (I_IXOFF(tty)) { 2202 unsigned char stop_char = STOP_CHAR(tty); 2203 status = edge_write(tty, port, &stop_char, 1); 2204 if (status <= 0) { 2205 dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status); 2206 } 2207 } 2208 2209 /* if we are implementing RTS/CTS, stop reads */ 2210 /* and the Edgeport will clear the RTS line */ 2211 if (C_CRTSCTS(tty)) 2212 stop_read(edge_port); 2213 2214 } 2215 2216 static void edge_unthrottle(struct tty_struct *tty) 2217 { 2218 struct usb_serial_port *port = tty->driver_data; 2219 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2220 int status; 2221 2222 dbg("%s - port %d", __func__, port->number); 2223 2224 if (edge_port == NULL) 2225 return; 2226 2227 /* if we are implementing XON/XOFF, send the start character */ 2228 if (I_IXOFF(tty)) { 2229 unsigned char start_char = START_CHAR(tty); 2230 status = edge_write(tty, port, &start_char, 1); 2231 if (status <= 0) { 2232 dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status); 2233 } 2234 } 2235 /* if we are implementing RTS/CTS, restart reads */ 2236 /* are the Edgeport will assert the RTS line */ 2237 if (C_CRTSCTS(tty)) { 2238 status = restart_read(edge_port); 2239 if (status) 2240 dev_err(&port->dev, 2241 "%s - read bulk usb_submit_urb failed: %d\n", 2242 __func__, status); 2243 } 2244 2245 } 2246 2247 static void stop_read(struct edgeport_port *edge_port) 2248 { 2249 unsigned long flags; 2250 2251 spin_lock_irqsave(&edge_port->ep_lock, flags); 2252 2253 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) 2254 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING; 2255 edge_port->shadow_mcr &= ~MCR_RTS; 2256 2257 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2258 } 2259 2260 static int restart_read(struct edgeport_port *edge_port) 2261 { 2262 struct urb *urb; 2263 int status = 0; 2264 unsigned long flags; 2265 2266 spin_lock_irqsave(&edge_port->ep_lock, flags); 2267 2268 if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) { 2269 urb = edge_port->port->read_urb; 2270 urb->complete = edge_bulk_in_callback; 2271 urb->context = edge_port; 2272 urb->dev = edge_port->port->serial->dev; 2273 status = usb_submit_urb(urb, GFP_ATOMIC); 2274 } 2275 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING; 2276 edge_port->shadow_mcr |= MCR_RTS; 2277 2278 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2279 2280 return status; 2281 } 2282 2283 static void change_port_settings(struct tty_struct *tty, 2284 struct edgeport_port *edge_port, struct ktermios *old_termios) 2285 { 2286 struct ump_uart_config *config; 2287 int baud; 2288 unsigned cflag; 2289 int status; 2290 int port_number = edge_port->port->number - 2291 edge_port->port->serial->minor; 2292 2293 dbg("%s - port %d", __func__, edge_port->port->number); 2294 2295 config = kmalloc (sizeof (*config), GFP_KERNEL); 2296 if (!config) { 2297 *tty->termios = *old_termios; 2298 dev_err(&edge_port->port->dev, "%s - out of memory\n", 2299 __func__); 2300 return; 2301 } 2302 2303 cflag = tty->termios->c_cflag; 2304 2305 config->wFlags = 0; 2306 2307 /* These flags must be set */ 2308 config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT; 2309 config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR; 2310 config->bUartMode = (__u8)(edge_port->bUartMode); 2311 2312 switch (cflag & CSIZE) { 2313 case CS5: 2314 config->bDataBits = UMP_UART_CHAR5BITS; 2315 dbg("%s - data bits = 5", __func__); 2316 break; 2317 case CS6: 2318 config->bDataBits = UMP_UART_CHAR6BITS; 2319 dbg("%s - data bits = 6", __func__); 2320 break; 2321 case CS7: 2322 config->bDataBits = UMP_UART_CHAR7BITS; 2323 dbg("%s - data bits = 7", __func__); 2324 break; 2325 default: 2326 case CS8: 2327 config->bDataBits = UMP_UART_CHAR8BITS; 2328 dbg("%s - data bits = 8", __func__); 2329 break; 2330 } 2331 2332 if (cflag & PARENB) { 2333 if (cflag & PARODD) { 2334 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY; 2335 config->bParity = UMP_UART_ODDPARITY; 2336 dbg("%s - parity = odd", __func__); 2337 } else { 2338 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY; 2339 config->bParity = UMP_UART_EVENPARITY; 2340 dbg("%s - parity = even", __func__); 2341 } 2342 } else { 2343 config->bParity = UMP_UART_NOPARITY; 2344 dbg("%s - parity = none", __func__); 2345 } 2346 2347 if (cflag & CSTOPB) { 2348 config->bStopBits = UMP_UART_STOPBIT2; 2349 dbg("%s - stop bits = 2", __func__); 2350 } else { 2351 config->bStopBits = UMP_UART_STOPBIT1; 2352 dbg("%s - stop bits = 1", __func__); 2353 } 2354 2355 /* figure out the flow control settings */ 2356 if (cflag & CRTSCTS) { 2357 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW; 2358 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW; 2359 dbg("%s - RTS/CTS is enabled", __func__); 2360 } else { 2361 dbg("%s - RTS/CTS is disabled", __func__); 2362 tty->hw_stopped = 0; 2363 restart_read(edge_port); 2364 } 2365 2366 /* if we are implementing XON/XOFF, set the start and stop 2367 character in the device */ 2368 config->cXon = START_CHAR(tty); 2369 config->cXoff = STOP_CHAR(tty); 2370 2371 /* if we are implementing INBOUND XON/XOFF */ 2372 if (I_IXOFF(tty)) { 2373 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X; 2374 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", 2375 __func__, config->cXon, config->cXoff); 2376 } else 2377 dbg("%s - INBOUND XON/XOFF is disabled", __func__); 2378 2379 /* if we are implementing OUTBOUND XON/XOFF */ 2380 if (I_IXON(tty)) { 2381 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X; 2382 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", 2383 __func__, config->cXon, config->cXoff); 2384 } else 2385 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__); 2386 2387 tty->termios->c_cflag &= ~CMSPAR; 2388 2389 /* Round the baud rate */ 2390 baud = tty_get_baud_rate(tty); 2391 if (!baud) { 2392 /* pick a default, any default... */ 2393 baud = 9600; 2394 } else 2395 tty_encode_baud_rate(tty, baud, baud); 2396 2397 edge_port->baud_rate = baud; 2398 config->wBaudRate = (__u16)((461550L + baud/2) / baud); 2399 2400 /* FIXME: Recompute actual baud from divisor here */ 2401 2402 dbg("%s - baud rate = %d, wBaudRate = %d", __func__, baud, 2403 config->wBaudRate); 2404 2405 dbg("wBaudRate: %d", (int)(461550L / config->wBaudRate)); 2406 dbg("wFlags: 0x%x", config->wFlags); 2407 dbg("bDataBits: %d", config->bDataBits); 2408 dbg("bParity: %d", config->bParity); 2409 dbg("bStopBits: %d", config->bStopBits); 2410 dbg("cXon: %d", config->cXon); 2411 dbg("cXoff: %d", config->cXoff); 2412 dbg("bUartMode: %d", config->bUartMode); 2413 2414 /* move the word values into big endian mode */ 2415 cpu_to_be16s(&config->wFlags); 2416 cpu_to_be16s(&config->wBaudRate); 2417 2418 status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG, 2419 (__u8)(UMPM_UART1_PORT + port_number), 2420 0, (__u8 *)config, sizeof(*config)); 2421 if (status) 2422 dbg("%s - error %d when trying to write config to device", 2423 __func__, status); 2424 kfree(config); 2425 return; 2426 } 2427 2428 static void edge_set_termios(struct tty_struct *tty, 2429 struct usb_serial_port *port, struct ktermios *old_termios) 2430 { 2431 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2432 unsigned int cflag; 2433 2434 cflag = tty->termios->c_cflag; 2435 2436 dbg("%s - clfag %08x iflag %08x", __func__, 2437 tty->termios->c_cflag, tty->termios->c_iflag); 2438 dbg("%s - old clfag %08x old iflag %08x", __func__, 2439 old_termios->c_cflag, old_termios->c_iflag); 2440 dbg("%s - port %d", __func__, port->number); 2441 2442 if (edge_port == NULL) 2443 return; 2444 /* change the port settings to the new ones specified */ 2445 change_port_settings(tty, edge_port, old_termios); 2446 return; 2447 } 2448 2449 static int edge_tiocmset(struct tty_struct *tty, struct file *file, 2450 unsigned int set, unsigned int clear) 2451 { 2452 struct usb_serial_port *port = tty->driver_data; 2453 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2454 unsigned int mcr; 2455 unsigned long flags; 2456 2457 dbg("%s - port %d", __func__, port->number); 2458 2459 spin_lock_irqsave(&edge_port->ep_lock, flags); 2460 mcr = edge_port->shadow_mcr; 2461 if (set & TIOCM_RTS) 2462 mcr |= MCR_RTS; 2463 if (set & TIOCM_DTR) 2464 mcr |= MCR_DTR; 2465 if (set & TIOCM_LOOP) 2466 mcr |= MCR_LOOPBACK; 2467 2468 if (clear & TIOCM_RTS) 2469 mcr &= ~MCR_RTS; 2470 if (clear & TIOCM_DTR) 2471 mcr &= ~MCR_DTR; 2472 if (clear & TIOCM_LOOP) 2473 mcr &= ~MCR_LOOPBACK; 2474 2475 edge_port->shadow_mcr = mcr; 2476 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2477 2478 restore_mcr(edge_port, mcr); 2479 return 0; 2480 } 2481 2482 static int edge_tiocmget(struct tty_struct *tty, struct file *file) 2483 { 2484 struct usb_serial_port *port = tty->driver_data; 2485 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2486 unsigned int result = 0; 2487 unsigned int msr; 2488 unsigned int mcr; 2489 unsigned long flags; 2490 2491 dbg("%s - port %d", __func__, port->number); 2492 2493 spin_lock_irqsave(&edge_port->ep_lock, flags); 2494 2495 msr = edge_port->shadow_msr; 2496 mcr = edge_port->shadow_mcr; 2497 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 2498 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 2499 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 2500 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 2501 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 2502 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 2503 2504 2505 dbg("%s -- %x", __func__, result); 2506 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2507 2508 return result; 2509 } 2510 2511 static int get_serial_info(struct edgeport_port *edge_port, 2512 struct serial_struct __user *retinfo) 2513 { 2514 struct serial_struct tmp; 2515 2516 if (!retinfo) 2517 return -EFAULT; 2518 2519 memset(&tmp, 0, sizeof(tmp)); 2520 2521 tmp.type = PORT_16550A; 2522 tmp.line = edge_port->port->serial->minor; 2523 tmp.port = edge_port->port->number; 2524 tmp.irq = 0; 2525 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2526 tmp.xmit_fifo_size = edge_port->port->bulk_out_size; 2527 tmp.baud_base = 9600; 2528 tmp.close_delay = 5*HZ; 2529 tmp.closing_wait = closing_wait; 2530 2531 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2532 return -EFAULT; 2533 return 0; 2534 } 2535 2536 static int edge_ioctl(struct tty_struct *tty, struct file *file, 2537 unsigned int cmd, unsigned long arg) 2538 { 2539 struct usb_serial_port *port = tty->driver_data; 2540 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2541 struct async_icount cnow; 2542 struct async_icount cprev; 2543 2544 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); 2545 2546 switch (cmd) { 2547 case TIOCGSERIAL: 2548 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number); 2549 return get_serial_info(edge_port, 2550 (struct serial_struct __user *) arg); 2551 case TIOCMIWAIT: 2552 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number); 2553 cprev = edge_port->icount; 2554 while (1) { 2555 interruptible_sleep_on(&edge_port->delta_msr_wait); 2556 /* see if a signal did it */ 2557 if (signal_pending(current)) 2558 return -ERESTARTSYS; 2559 cnow = edge_port->icount; 2560 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 2561 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 2562 return -EIO; /* no change => error */ 2563 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 2564 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 2565 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 2566 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) { 2567 return 0; 2568 } 2569 cprev = cnow; 2570 } 2571 /* not reached */ 2572 break; 2573 case TIOCGICOUNT: 2574 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __func__, 2575 port->number, edge_port->icount.rx, edge_port->icount.tx); 2576 if (copy_to_user((void __user *)arg, &edge_port->icount, 2577 sizeof(edge_port->icount))) 2578 return -EFAULT; 2579 return 0; 2580 } 2581 return -ENOIOCTLCMD; 2582 } 2583 2584 static void edge_break(struct tty_struct *tty, int break_state) 2585 { 2586 struct usb_serial_port *port = tty->driver_data; 2587 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2588 int status; 2589 int bv = 0; /* Off */ 2590 2591 dbg("%s - state = %d", __func__, break_state); 2592 2593 /* chase the port close */ 2594 chase_port(edge_port, 0, 0); 2595 2596 if (break_state == -1) 2597 bv = 1; /* On */ 2598 status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv); 2599 if (status) 2600 dbg("%s - error %d sending break set/clear command.", 2601 __func__, status); 2602 } 2603 2604 static int edge_startup(struct usb_serial *serial) 2605 { 2606 struct edgeport_serial *edge_serial; 2607 struct edgeport_port *edge_port; 2608 struct usb_device *dev; 2609 int status; 2610 int i; 2611 2612 dev = serial->dev; 2613 2614 /* create our private serial structure */ 2615 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); 2616 if (edge_serial == NULL) { 2617 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); 2618 return -ENOMEM; 2619 } 2620 mutex_init(&edge_serial->es_lock); 2621 edge_serial->serial = serial; 2622 usb_set_serial_data(serial, edge_serial); 2623 2624 status = download_fw(edge_serial); 2625 if (status) { 2626 kfree(edge_serial); 2627 return status; 2628 } 2629 2630 /* set up our port private structures */ 2631 for (i = 0; i < serial->num_ports; ++i) { 2632 edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL); 2633 if (edge_port == NULL) { 2634 dev_err(&serial->dev->dev, "%s - Out of memory\n", 2635 __func__); 2636 goto cleanup; 2637 } 2638 spin_lock_init(&edge_port->ep_lock); 2639 edge_port->ep_out_buf = edge_buf_alloc(EDGE_OUT_BUF_SIZE); 2640 if (edge_port->ep_out_buf == NULL) { 2641 dev_err(&serial->dev->dev, "%s - Out of memory\n", 2642 __func__); 2643 kfree(edge_port); 2644 goto cleanup; 2645 } 2646 edge_port->port = serial->port[i]; 2647 edge_port->edge_serial = edge_serial; 2648 usb_set_serial_port_data(serial->port[i], edge_port); 2649 edge_port->bUartMode = default_uart_mode; 2650 } 2651 2652 return 0; 2653 2654 cleanup: 2655 for (--i; i >= 0; --i) { 2656 edge_port = usb_get_serial_port_data(serial->port[i]); 2657 edge_buf_free(edge_port->ep_out_buf); 2658 kfree(edge_port); 2659 usb_set_serial_port_data(serial->port[i], NULL); 2660 } 2661 kfree(edge_serial); 2662 usb_set_serial_data(serial, NULL); 2663 return -ENOMEM; 2664 } 2665 2666 static void edge_disconnect(struct usb_serial *serial) 2667 { 2668 int i; 2669 struct edgeport_port *edge_port; 2670 2671 dbg("%s", __func__); 2672 2673 for (i = 0; i < serial->num_ports; ++i) { 2674 edge_port = usb_get_serial_port_data(serial->port[i]); 2675 edge_remove_sysfs_attrs(edge_port->port); 2676 } 2677 } 2678 2679 static void edge_release(struct usb_serial *serial) 2680 { 2681 int i; 2682 struct edgeport_port *edge_port; 2683 2684 dbg("%s", __func__); 2685 2686 for (i = 0; i < serial->num_ports; ++i) { 2687 edge_port = usb_get_serial_port_data(serial->port[i]); 2688 edge_buf_free(edge_port->ep_out_buf); 2689 kfree(edge_port); 2690 } 2691 kfree(usb_get_serial_data(serial)); 2692 } 2693 2694 2695 /* Sysfs Attributes */ 2696 2697 static ssize_t show_uart_mode(struct device *dev, 2698 struct device_attribute *attr, char *buf) 2699 { 2700 struct usb_serial_port *port = to_usb_serial_port(dev); 2701 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2702 2703 return sprintf(buf, "%d\n", edge_port->bUartMode); 2704 } 2705 2706 static ssize_t store_uart_mode(struct device *dev, 2707 struct device_attribute *attr, const char *valbuf, size_t count) 2708 { 2709 struct usb_serial_port *port = to_usb_serial_port(dev); 2710 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2711 unsigned int v = simple_strtoul(valbuf, NULL, 0); 2712 2713 dbg("%s: setting uart_mode = %d", __func__, v); 2714 2715 if (v < 256) 2716 edge_port->bUartMode = v; 2717 else 2718 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v); 2719 2720 return count; 2721 } 2722 2723 static DEVICE_ATTR(uart_mode, S_IWUSR | S_IRUGO, show_uart_mode, 2724 store_uart_mode); 2725 2726 static int edge_create_sysfs_attrs(struct usb_serial_port *port) 2727 { 2728 return device_create_file(&port->dev, &dev_attr_uart_mode); 2729 } 2730 2731 static int edge_remove_sysfs_attrs(struct usb_serial_port *port) 2732 { 2733 device_remove_file(&port->dev, &dev_attr_uart_mode); 2734 return 0; 2735 } 2736 2737 2738 /* Circular Buffer */ 2739 2740 /* 2741 * edge_buf_alloc 2742 * 2743 * Allocate a circular buffer and all associated memory. 2744 */ 2745 2746 static struct edge_buf *edge_buf_alloc(unsigned int size) 2747 { 2748 struct edge_buf *eb; 2749 2750 2751 if (size == 0) 2752 return NULL; 2753 2754 eb = kmalloc(sizeof(struct edge_buf), GFP_KERNEL); 2755 if (eb == NULL) 2756 return NULL; 2757 2758 eb->buf_buf = kmalloc(size, GFP_KERNEL); 2759 if (eb->buf_buf == NULL) { 2760 kfree(eb); 2761 return NULL; 2762 } 2763 2764 eb->buf_size = size; 2765 eb->buf_get = eb->buf_put = eb->buf_buf; 2766 2767 return eb; 2768 } 2769 2770 2771 /* 2772 * edge_buf_free 2773 * 2774 * Free the buffer and all associated memory. 2775 */ 2776 2777 static void edge_buf_free(struct edge_buf *eb) 2778 { 2779 if (eb) { 2780 kfree(eb->buf_buf); 2781 kfree(eb); 2782 } 2783 } 2784 2785 2786 /* 2787 * edge_buf_clear 2788 * 2789 * Clear out all data in the circular buffer. 2790 */ 2791 2792 static void edge_buf_clear(struct edge_buf *eb) 2793 { 2794 if (eb != NULL) 2795 eb->buf_get = eb->buf_put; 2796 /* equivalent to a get of all data available */ 2797 } 2798 2799 2800 /* 2801 * edge_buf_data_avail 2802 * 2803 * Return the number of bytes of data available in the circular 2804 * buffer. 2805 */ 2806 2807 static unsigned int edge_buf_data_avail(struct edge_buf *eb) 2808 { 2809 if (eb == NULL) 2810 return 0; 2811 return ((eb->buf_size + eb->buf_put - eb->buf_get) % eb->buf_size); 2812 } 2813 2814 2815 /* 2816 * edge_buf_space_avail 2817 * 2818 * Return the number of bytes of space available in the circular 2819 * buffer. 2820 */ 2821 2822 static unsigned int edge_buf_space_avail(struct edge_buf *eb) 2823 { 2824 if (eb == NULL) 2825 return 0; 2826 return ((eb->buf_size + eb->buf_get - eb->buf_put - 1) % eb->buf_size); 2827 } 2828 2829 2830 /* 2831 * edge_buf_put 2832 * 2833 * Copy data data from a user buffer and put it into the circular buffer. 2834 * Restrict to the amount of space available. 2835 * 2836 * Return the number of bytes copied. 2837 */ 2838 2839 static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf, 2840 unsigned int count) 2841 { 2842 unsigned int len; 2843 2844 2845 if (eb == NULL) 2846 return 0; 2847 2848 len = edge_buf_space_avail(eb); 2849 if (count > len) 2850 count = len; 2851 2852 if (count == 0) 2853 return 0; 2854 2855 len = eb->buf_buf + eb->buf_size - eb->buf_put; 2856 if (count > len) { 2857 memcpy(eb->buf_put, buf, len); 2858 memcpy(eb->buf_buf, buf+len, count - len); 2859 eb->buf_put = eb->buf_buf + count - len; 2860 } else { 2861 memcpy(eb->buf_put, buf, count); 2862 if (count < len) 2863 eb->buf_put += count; 2864 else /* count == len */ 2865 eb->buf_put = eb->buf_buf; 2866 } 2867 2868 return count; 2869 } 2870 2871 2872 /* 2873 * edge_buf_get 2874 * 2875 * Get data from the circular buffer and copy to the given buffer. 2876 * Restrict to the amount of data available. 2877 * 2878 * Return the number of bytes copied. 2879 */ 2880 2881 static unsigned int edge_buf_get(struct edge_buf *eb, char *buf, 2882 unsigned int count) 2883 { 2884 unsigned int len; 2885 2886 2887 if (eb == NULL) 2888 return 0; 2889 2890 len = edge_buf_data_avail(eb); 2891 if (count > len) 2892 count = len; 2893 2894 if (count == 0) 2895 return 0; 2896 2897 len = eb->buf_buf + eb->buf_size - eb->buf_get; 2898 if (count > len) { 2899 memcpy(buf, eb->buf_get, len); 2900 memcpy(buf+len, eb->buf_buf, count - len); 2901 eb->buf_get = eb->buf_buf + count - len; 2902 } else { 2903 memcpy(buf, eb->buf_get, count); 2904 if (count < len) 2905 eb->buf_get += count; 2906 else /* count == len */ 2907 eb->buf_get = eb->buf_buf; 2908 } 2909 2910 return count; 2911 } 2912 2913 2914 static struct usb_serial_driver edgeport_1port_device = { 2915 .driver = { 2916 .owner = THIS_MODULE, 2917 .name = "edgeport_ti_1", 2918 }, 2919 .description = "Edgeport TI 1 port adapter", 2920 .usb_driver = &io_driver, 2921 .id_table = edgeport_1port_id_table, 2922 .num_ports = 1, 2923 .open = edge_open, 2924 .close = edge_close, 2925 .throttle = edge_throttle, 2926 .unthrottle = edge_unthrottle, 2927 .attach = edge_startup, 2928 .disconnect = edge_disconnect, 2929 .release = edge_release, 2930 .port_probe = edge_create_sysfs_attrs, 2931 .ioctl = edge_ioctl, 2932 .set_termios = edge_set_termios, 2933 .tiocmget = edge_tiocmget, 2934 .tiocmset = edge_tiocmset, 2935 .write = edge_write, 2936 .write_room = edge_write_room, 2937 .chars_in_buffer = edge_chars_in_buffer, 2938 .break_ctl = edge_break, 2939 .read_int_callback = edge_interrupt_callback, 2940 .read_bulk_callback = edge_bulk_in_callback, 2941 .write_bulk_callback = edge_bulk_out_callback, 2942 }; 2943 2944 static struct usb_serial_driver edgeport_2port_device = { 2945 .driver = { 2946 .owner = THIS_MODULE, 2947 .name = "edgeport_ti_2", 2948 }, 2949 .description = "Edgeport TI 2 port adapter", 2950 .usb_driver = &io_driver, 2951 .id_table = edgeport_2port_id_table, 2952 .num_ports = 2, 2953 .open = edge_open, 2954 .close = edge_close, 2955 .throttle = edge_throttle, 2956 .unthrottle = edge_unthrottle, 2957 .attach = edge_startup, 2958 .disconnect = edge_disconnect, 2959 .release = edge_release, 2960 .port_probe = edge_create_sysfs_attrs, 2961 .ioctl = edge_ioctl, 2962 .set_termios = edge_set_termios, 2963 .tiocmget = edge_tiocmget, 2964 .tiocmset = edge_tiocmset, 2965 .write = edge_write, 2966 .write_room = edge_write_room, 2967 .chars_in_buffer = edge_chars_in_buffer, 2968 .break_ctl = edge_break, 2969 .read_int_callback = edge_interrupt_callback, 2970 .read_bulk_callback = edge_bulk_in_callback, 2971 .write_bulk_callback = edge_bulk_out_callback, 2972 }; 2973 2974 2975 static int __init edgeport_init(void) 2976 { 2977 int retval; 2978 retval = usb_serial_register(&edgeport_1port_device); 2979 if (retval) 2980 goto failed_1port_device_register; 2981 retval = usb_serial_register(&edgeport_2port_device); 2982 if (retval) 2983 goto failed_2port_device_register; 2984 retval = usb_register(&io_driver); 2985 if (retval) 2986 goto failed_usb_register; 2987 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 2988 DRIVER_DESC "\n"); 2989 return 0; 2990 failed_usb_register: 2991 usb_serial_deregister(&edgeport_2port_device); 2992 failed_2port_device_register: 2993 usb_serial_deregister(&edgeport_1port_device); 2994 failed_1port_device_register: 2995 return retval; 2996 } 2997 2998 static void __exit edgeport_exit(void) 2999 { 3000 usb_deregister(&io_driver); 3001 usb_serial_deregister(&edgeport_1port_device); 3002 usb_serial_deregister(&edgeport_2port_device); 3003 } 3004 3005 module_init(edgeport_init); 3006 module_exit(edgeport_exit); 3007 3008 /* Module information */ 3009 MODULE_AUTHOR(DRIVER_AUTHOR); 3010 MODULE_DESCRIPTION(DRIVER_DESC); 3011 MODULE_LICENSE("GPL"); 3012 MODULE_FIRMWARE("edgeport/down3.bin"); 3013 3014 module_param(debug, bool, S_IRUGO | S_IWUSR); 3015 MODULE_PARM_DESC(debug, "Debug enabled or not"); 3016 3017 module_param(closing_wait, int, S_IRUGO | S_IWUSR); 3018 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs"); 3019 3020 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR); 3021 MODULE_PARM_DESC(ignore_cpu_rev, 3022 "Ignore the cpu revision when connecting to a device"); 3023 3024 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR); 3025 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ..."); 3026