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 20 #include <linux/kernel.h> 21 #include <linux/jiffies.h> 22 #include <linux/errno.h> 23 #include <linux/slab.h> 24 #include <linux/tty.h> 25 #include <linux/tty_driver.h> 26 #include <linux/tty_flip.h> 27 #include <linux/module.h> 28 #include <linux/spinlock.h> 29 #include <linux/mutex.h> 30 #include <linux/serial.h> 31 #include <linux/swab.h> 32 #include <linux/kfifo.h> 33 #include <linux/ioctl.h> 34 #include <linux/firmware.h> 35 #include <linux/uaccess.h> 36 #include <linux/usb.h> 37 #include <linux/usb/serial.h> 38 39 #include "io_16654.h" 40 #include "io_usbvend.h" 41 #include "io_ti.h" 42 43 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli" 44 #define DRIVER_DESC "Edgeport USB Serial Driver" 45 46 #define EPROM_PAGE_SIZE 64 47 48 49 /* different hardware types */ 50 #define HARDWARE_TYPE_930 0 51 #define HARDWARE_TYPE_TIUMP 1 52 53 /* IOCTL_PRIVATE_TI_GET_MODE Definitions */ 54 #define TI_MODE_CONFIGURING 0 /* Device has not entered start device */ 55 #define TI_MODE_BOOT 1 /* Staying in boot mode */ 56 #define TI_MODE_DOWNLOAD 2 /* Made it to download mode */ 57 #define TI_MODE_TRANSITIONING 3 /* 58 * Currently in boot mode but 59 * transitioning to download mode 60 */ 61 62 /* read urb state */ 63 #define EDGE_READ_URB_RUNNING 0 64 #define EDGE_READ_URB_STOPPING 1 65 #define EDGE_READ_URB_STOPPED 2 66 67 #define EDGE_CLOSING_WAIT 4000 /* in .01 sec */ 68 69 70 /* Product information read from the Edgeport */ 71 struct product_info { 72 int TiMode; /* Current TI Mode */ 73 __u8 hardware_type; /* Type of hardware */ 74 } __attribute__((packed)); 75 76 /* 77 * Edgeport firmware header 78 * 79 * "build_number" has been set to 0 in all three of the images I have 80 * seen, and Digi Tech Support suggests that it is safe to ignore it. 81 * 82 * "length" is the number of bytes of actual data following the header. 83 * 84 * "checksum" is the low order byte resulting from adding the values of 85 * all the data bytes. 86 */ 87 struct edgeport_fw_hdr { 88 u8 major_version; 89 u8 minor_version; 90 __le16 build_number; 91 __le16 length; 92 u8 checksum; 93 } __packed; 94 95 struct edgeport_port { 96 __u16 uart_base; 97 __u16 dma_address; 98 __u8 shadow_msr; 99 __u8 shadow_mcr; 100 __u8 shadow_lsr; 101 __u8 lsr_mask; 102 __u32 ump_read_timeout; /* 103 * Number of milliseconds the UMP will 104 * wait without data before completing 105 * a read short 106 */ 107 int baud_rate; 108 int close_pending; 109 int lsr_event; 110 111 struct edgeport_serial *edge_serial; 112 struct usb_serial_port *port; 113 __u8 bUartMode; /* Port type, 0: RS232, etc. */ 114 spinlock_t ep_lock; 115 int ep_read_urb_state; 116 int ep_write_urb_in_use; 117 }; 118 119 struct edgeport_serial { 120 struct product_info product_info; 121 u8 TI_I2C_Type; /* Type of I2C in UMP */ 122 u8 TiReadI2C; /* 123 * Set to TRUE if we have read the 124 * I2c in Boot Mode 125 */ 126 struct mutex es_lock; 127 int num_ports_open; 128 struct usb_serial *serial; 129 struct delayed_work heartbeat_work; 130 int fw_version; 131 bool use_heartbeat; 132 }; 133 134 135 /* Devices that this driver supports */ 136 static const struct usb_device_id edgeport_1port_id_table[] = { 137 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) }, 138 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) }, 139 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) }, 140 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) }, 141 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) }, 142 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) }, 143 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) }, 144 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) }, 145 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) }, 146 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) }, 147 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) }, 148 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) }, 149 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) }, 150 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) }, 151 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) }, 152 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) }, 153 { } 154 }; 155 156 static const struct usb_device_id edgeport_2port_id_table[] = { 157 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) }, 158 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) }, 159 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) }, 160 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) }, 161 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) }, 162 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) }, 163 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) }, 164 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) }, 165 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) }, 166 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) }, 167 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) }, 168 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) }, 169 /* The 4, 8 and 16 port devices show up as multiple 2 port devices */ 170 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) }, 171 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) }, 172 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) }, 173 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) }, 174 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) }, 175 { } 176 }; 177 178 /* Devices that this driver supports */ 179 static const struct usb_device_id id_table_combined[] = { 180 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) }, 181 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) }, 182 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) }, 183 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) }, 184 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) }, 185 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) }, 186 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) }, 187 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) }, 188 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) }, 189 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) }, 190 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) }, 191 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) }, 192 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) }, 193 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) }, 194 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) }, 195 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) }, 196 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) }, 197 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) }, 198 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) }, 199 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) }, 200 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) }, 201 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) }, 202 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) }, 203 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) }, 204 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) }, 205 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) }, 206 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) }, 207 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) }, 208 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) }, 209 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) }, 210 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) }, 211 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) }, 212 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) }, 213 { } 214 }; 215 216 MODULE_DEVICE_TABLE(usb, id_table_combined); 217 218 static int closing_wait = EDGE_CLOSING_WAIT; 219 static bool ignore_cpu_rev; 220 static int default_uart_mode; /* RS232 */ 221 222 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, 223 int length); 224 225 static void stop_read(struct edgeport_port *edge_port); 226 static int restart_read(struct edgeport_port *edge_port); 227 228 static void edge_set_termios(struct tty_struct *tty, 229 struct usb_serial_port *port, struct ktermios *old_termios); 230 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty); 231 232 static int do_download_mode(struct edgeport_serial *serial, 233 const struct firmware *fw); 234 static int do_boot_mode(struct edgeport_serial *serial, 235 const struct firmware *fw); 236 237 /* sysfs attributes */ 238 static int edge_create_sysfs_attrs(struct usb_serial_port *port); 239 static int edge_remove_sysfs_attrs(struct usb_serial_port *port); 240 241 /* 242 * Some release of Edgeport firmware "down3.bin" after version 4.80 243 * introduced code to automatically disconnect idle devices on some 244 * Edgeport models after periods of inactivity, typically ~60 seconds. 245 * This occurs without regard to whether ports on the device are open 246 * or not. Digi International Tech Support suggested: 247 * 248 * 1. Adding driver "heartbeat" code to reset the firmware timer by 249 * requesting a descriptor record every 15 seconds, which should be 250 * effective with newer firmware versions that require it, and benign 251 * with older versions that do not. In practice 40 seconds seems often 252 * enough. 253 * 2. The heartbeat code is currently required only on Edgeport/416 models. 254 */ 255 #define FW_HEARTBEAT_VERSION_CUTOFF ((4 << 8) + 80) 256 #define FW_HEARTBEAT_SECS 40 257 258 /* Timeouts in msecs: firmware downloads take longer */ 259 #define TI_VSEND_TIMEOUT_DEFAULT 1000 260 #define TI_VSEND_TIMEOUT_FW_DOWNLOAD 10000 261 262 static int ti_vread_sync(struct usb_device *dev, __u8 request, 263 __u16 value, __u16 index, u8 *data, int size) 264 { 265 int status; 266 267 status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request, 268 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN), 269 value, index, data, size, 1000); 270 if (status < 0) 271 return status; 272 if (status != size) { 273 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n", 274 __func__, size, status); 275 return -ECOMM; 276 } 277 return 0; 278 } 279 280 static int ti_vsend_sync(struct usb_device *dev, u8 request, u16 value, 281 u16 index, u8 *data, int size, int timeout) 282 { 283 int status; 284 285 status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request, 286 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT), 287 value, index, data, size, timeout); 288 if (status < 0) 289 return status; 290 if (status != size) { 291 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n", 292 __func__, size, status); 293 return -ECOMM; 294 } 295 return 0; 296 } 297 298 static int send_cmd(struct usb_device *dev, __u8 command, 299 __u8 moduleid, __u16 value, u8 *data, 300 int size) 301 { 302 return ti_vsend_sync(dev, command, value, moduleid, data, size, 303 TI_VSEND_TIMEOUT_DEFAULT); 304 } 305 306 /* clear tx/rx buffers and fifo in TI UMP */ 307 static int purge_port(struct usb_serial_port *port, __u16 mask) 308 { 309 int port_number = port->port_number; 310 311 dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask); 312 313 return send_cmd(port->serial->dev, 314 UMPC_PURGE_PORT, 315 (__u8)(UMPM_UART1_PORT + port_number), 316 mask, 317 NULL, 318 0); 319 } 320 321 /** 322 * read_download_mem - Read edgeport memory from TI chip 323 * @dev: usb device pointer 324 * @start_address: Device CPU address at which to read 325 * @length: Length of above data 326 * @address_type: Can read both XDATA and I2C 327 * @buffer: pointer to input data buffer 328 */ 329 static int read_download_mem(struct usb_device *dev, int start_address, 330 int length, __u8 address_type, __u8 *buffer) 331 { 332 int status = 0; 333 __u8 read_length; 334 u16 be_start_address; 335 336 dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, length); 337 338 /* 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 dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, read_length); 350 } 351 /* 352 * NOTE: Must use swab as wIndex is sent in little-endian 353 * byte order regardless of host byte order. 354 */ 355 be_start_address = swab16((u16)start_address); 356 status = ti_vread_sync(dev, UMPC_MEMORY_READ, 357 (__u16)address_type, 358 be_start_address, 359 buffer, read_length); 360 361 if (status) { 362 dev_dbg(&dev->dev, "%s - ERROR %x\n", __func__, status); 363 return status; 364 } 365 366 if (read_length > 1) 367 usb_serial_debug_data(&dev->dev, __func__, read_length, buffer); 368 369 /* Update pointers/length */ 370 start_address += read_length; 371 buffer += read_length; 372 length -= read_length; 373 } 374 375 return status; 376 } 377 378 static int read_ram(struct usb_device *dev, int start_address, 379 int length, __u8 *buffer) 380 { 381 return read_download_mem(dev, start_address, length, 382 DTK_ADDR_SPACE_XDATA, buffer); 383 } 384 385 /* Read edgeport memory to a given block */ 386 static int read_boot_mem(struct edgeport_serial *serial, 387 int start_address, int length, __u8 *buffer) 388 { 389 int status = 0; 390 int i; 391 392 for (i = 0; i < length; i++) { 393 status = ti_vread_sync(serial->serial->dev, 394 UMPC_MEMORY_READ, serial->TI_I2C_Type, 395 (__u16)(start_address+i), &buffer[i], 0x01); 396 if (status) { 397 dev_dbg(&serial->serial->dev->dev, "%s - ERROR %x\n", __func__, status); 398 return status; 399 } 400 } 401 402 dev_dbg(&serial->serial->dev->dev, "%s - start_address = %x, length = %d\n", 403 __func__, start_address, length); 404 usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer); 405 406 serial->TiReadI2C = 1; 407 408 return status; 409 } 410 411 /* Write given block to TI EPROM memory */ 412 static int write_boot_mem(struct edgeport_serial *serial, 413 int start_address, int length, __u8 *buffer) 414 { 415 int status = 0; 416 int i; 417 u8 *temp; 418 419 /* Must do a read before write */ 420 if (!serial->TiReadI2C) { 421 temp = kmalloc(1, GFP_KERNEL); 422 if (!temp) 423 return -ENOMEM; 424 425 status = read_boot_mem(serial, 0, 1, temp); 426 kfree(temp); 427 if (status) 428 return status; 429 } 430 431 for (i = 0; i < length; ++i) { 432 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE, 433 buffer[i], (u16)(i + start_address), NULL, 434 0, TI_VSEND_TIMEOUT_DEFAULT); 435 if (status) 436 return status; 437 } 438 439 dev_dbg(&serial->serial->dev->dev, "%s - start_sddr = %x, length = %d\n", __func__, start_address, length); 440 usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer); 441 442 return status; 443 } 444 445 /* Write edgeport I2C memory to TI chip */ 446 static int write_i2c_mem(struct edgeport_serial *serial, 447 int start_address, int length, __u8 address_type, __u8 *buffer) 448 { 449 struct device *dev = &serial->serial->dev->dev; 450 int status = 0; 451 int write_length; 452 u16 be_start_address; 453 454 /* We can only send a maximum of 1 aligned byte page at a time */ 455 456 /* calculate the number of bytes left in the first page */ 457 write_length = EPROM_PAGE_SIZE - 458 (start_address & (EPROM_PAGE_SIZE - 1)); 459 460 if (write_length > length) 461 write_length = length; 462 463 dev_dbg(dev, "%s - BytesInFirstPage Addr = %x, length = %d\n", 464 __func__, start_address, write_length); 465 usb_serial_debug_data(dev, __func__, write_length, buffer); 466 467 /* 468 * Write first page. 469 * 470 * NOTE: Must use swab as wIndex is sent in little-endian byte order 471 * regardless of host byte order. 472 */ 473 be_start_address = swab16((u16)start_address); 474 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE, 475 (u16)address_type, be_start_address, 476 buffer, write_length, TI_VSEND_TIMEOUT_DEFAULT); 477 if (status) { 478 dev_dbg(dev, "%s - ERROR %d\n", __func__, status); 479 return status; 480 } 481 482 length -= write_length; 483 start_address += write_length; 484 buffer += write_length; 485 486 /* 487 * We should be aligned now -- can write max page size bytes at a 488 * time. 489 */ 490 while (length) { 491 if (length > EPROM_PAGE_SIZE) 492 write_length = EPROM_PAGE_SIZE; 493 else 494 write_length = length; 495 496 dev_dbg(dev, "%s - Page Write Addr = %x, length = %d\n", 497 __func__, start_address, write_length); 498 usb_serial_debug_data(dev, __func__, write_length, buffer); 499 500 /* 501 * Write next page. 502 * 503 * NOTE: Must use swab as wIndex is sent in little-endian byte 504 * order regardless of host byte order. 505 */ 506 be_start_address = swab16((u16)start_address); 507 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE, 508 (u16)address_type, be_start_address, buffer, 509 write_length, TI_VSEND_TIMEOUT_DEFAULT); 510 if (status) { 511 dev_err(dev, "%s - ERROR %d\n", __func__, status); 512 return status; 513 } 514 515 length -= write_length; 516 start_address += write_length; 517 buffer += write_length; 518 } 519 return status; 520 } 521 522 /* 523 * Examine the UMP DMA registers and LSR 524 * 525 * Check the MSBit of the X and Y DMA byte count registers. 526 * A zero in this bit indicates that the TX DMA buffers are empty 527 * then check the TX Empty bit in the UART. 528 */ 529 static int tx_active(struct edgeport_port *port) 530 { 531 int status; 532 struct out_endpoint_desc_block *oedb; 533 __u8 *lsr; 534 int bytes_left = 0; 535 536 oedb = kmalloc(sizeof(*oedb), GFP_KERNEL); 537 if (!oedb) 538 return -ENOMEM; 539 540 /* 541 * Sigh, that's right, just one byte, as not all platforms can 542 * do DMA from stack 543 */ 544 lsr = kmalloc(1, GFP_KERNEL); 545 if (!lsr) { 546 kfree(oedb); 547 return -ENOMEM; 548 } 549 /* Read the DMA Count Registers */ 550 status = read_ram(port->port->serial->dev, port->dma_address, 551 sizeof(*oedb), (void *)oedb); 552 if (status) 553 goto exit_is_tx_active; 554 555 dev_dbg(&port->port->dev, "%s - XByteCount 0x%X\n", __func__, oedb->XByteCount); 556 557 /* and the LSR */ 558 status = read_ram(port->port->serial->dev, 559 port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr); 560 561 if (status) 562 goto exit_is_tx_active; 563 dev_dbg(&port->port->dev, "%s - LSR = 0x%X\n", __func__, *lsr); 564 565 /* If either buffer has data or we are transmitting then return TRUE */ 566 if ((oedb->XByteCount & 0x80) != 0) 567 bytes_left += 64; 568 569 if ((*lsr & UMP_UART_LSR_TX_MASK) == 0) 570 bytes_left += 1; 571 572 /* We return Not Active if we get any kind of error */ 573 exit_is_tx_active: 574 dev_dbg(&port->port->dev, "%s - return %d\n", __func__, bytes_left); 575 576 kfree(lsr); 577 kfree(oedb); 578 return bytes_left; 579 } 580 581 static int choose_config(struct usb_device *dev) 582 { 583 /* 584 * There may be multiple configurations on this device, in which case 585 * we would need to read and parse all of them to find out which one 586 * we want. However, we just support one config at this point, 587 * configuration # 1, which is Config Descriptor 0. 588 */ 589 590 dev_dbg(&dev->dev, "%s - Number of Interfaces = %d\n", 591 __func__, dev->config->desc.bNumInterfaces); 592 dev_dbg(&dev->dev, "%s - MAX Power = %d\n", 593 __func__, dev->config->desc.bMaxPower * 2); 594 595 if (dev->config->desc.bNumInterfaces != 1) { 596 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __func__); 597 return -ENODEV; 598 } 599 600 return 0; 601 } 602 603 static int read_rom(struct edgeport_serial *serial, 604 int start_address, int length, __u8 *buffer) 605 { 606 int status; 607 608 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) { 609 status = read_download_mem(serial->serial->dev, 610 start_address, 611 length, 612 serial->TI_I2C_Type, 613 buffer); 614 } else { 615 status = read_boot_mem(serial, start_address, length, 616 buffer); 617 } 618 return status; 619 } 620 621 static int write_rom(struct edgeport_serial *serial, int start_address, 622 int length, __u8 *buffer) 623 { 624 if (serial->product_info.TiMode == TI_MODE_BOOT) 625 return write_boot_mem(serial, start_address, length, 626 buffer); 627 628 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) 629 return write_i2c_mem(serial, start_address, length, 630 serial->TI_I2C_Type, buffer); 631 return -EINVAL; 632 } 633 634 /* Read a descriptor header from I2C based on type */ 635 static int get_descriptor_addr(struct edgeport_serial *serial, 636 int desc_type, struct ti_i2c_desc *rom_desc) 637 { 638 int start_address; 639 int status; 640 641 /* Search for requested descriptor in I2C */ 642 start_address = 2; 643 do { 644 status = read_rom(serial, 645 start_address, 646 sizeof(struct ti_i2c_desc), 647 (__u8 *)rom_desc); 648 if (status) 649 return 0; 650 651 if (rom_desc->Type == desc_type) 652 return start_address; 653 654 start_address = start_address + sizeof(struct ti_i2c_desc) + 655 le16_to_cpu(rom_desc->Size); 656 657 } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type); 658 659 return 0; 660 } 661 662 /* Validate descriptor checksum */ 663 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer) 664 { 665 __u16 i; 666 __u8 cs = 0; 667 668 for (i = 0; i < le16_to_cpu(rom_desc->Size); i++) 669 cs = (__u8)(cs + buffer[i]); 670 671 if (cs != rom_desc->CheckSum) { 672 pr_debug("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs); 673 return -EINVAL; 674 } 675 return 0; 676 } 677 678 /* Make sure that the I2C image is good */ 679 static int check_i2c_image(struct edgeport_serial *serial) 680 { 681 struct device *dev = &serial->serial->dev->dev; 682 int status = 0; 683 struct ti_i2c_desc *rom_desc; 684 int start_address = 2; 685 __u8 *buffer; 686 __u16 ttype; 687 688 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 689 if (!rom_desc) 690 return -ENOMEM; 691 692 buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL); 693 if (!buffer) { 694 kfree(rom_desc); 695 return -ENOMEM; 696 } 697 698 /* Read the first byte (Signature0) must be 0x52 or 0x10 */ 699 status = read_rom(serial, 0, 1, buffer); 700 if (status) 701 goto out; 702 703 if (*buffer != UMP5152 && *buffer != UMP3410) { 704 dev_err(dev, "%s - invalid buffer signature\n", __func__); 705 status = -ENODEV; 706 goto out; 707 } 708 709 do { 710 /* Validate the I2C */ 711 status = read_rom(serial, 712 start_address, 713 sizeof(struct ti_i2c_desc), 714 (__u8 *)rom_desc); 715 if (status) 716 break; 717 718 if ((start_address + sizeof(struct ti_i2c_desc) + 719 le16_to_cpu(rom_desc->Size)) > TI_MAX_I2C_SIZE) { 720 status = -ENODEV; 721 dev_dbg(dev, "%s - structure too big, erroring out.\n", __func__); 722 break; 723 } 724 725 dev_dbg(dev, "%s Type = 0x%x\n", __func__, rom_desc->Type); 726 727 /* Skip type 2 record */ 728 ttype = rom_desc->Type & 0x0f; 729 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC 730 && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) { 731 /* Read the descriptor data */ 732 status = read_rom(serial, start_address + 733 sizeof(struct ti_i2c_desc), 734 le16_to_cpu(rom_desc->Size), 735 buffer); 736 if (status) 737 break; 738 739 status = valid_csum(rom_desc, buffer); 740 if (status) 741 break; 742 } 743 start_address = start_address + sizeof(struct ti_i2c_desc) + 744 le16_to_cpu(rom_desc->Size); 745 746 } while ((rom_desc->Type != I2C_DESC_TYPE_ION) && 747 (start_address < TI_MAX_I2C_SIZE)); 748 749 if ((rom_desc->Type != I2C_DESC_TYPE_ION) || 750 (start_address > TI_MAX_I2C_SIZE)) 751 status = -ENODEV; 752 753 out: 754 kfree(buffer); 755 kfree(rom_desc); 756 return status; 757 } 758 759 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer) 760 { 761 int status; 762 int start_address; 763 struct ti_i2c_desc *rom_desc; 764 struct edge_ti_manuf_descriptor *desc; 765 struct device *dev = &serial->serial->dev->dev; 766 767 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 768 if (!rom_desc) 769 return -ENOMEM; 770 771 start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION, 772 rom_desc); 773 774 if (!start_address) { 775 dev_dbg(dev, "%s - Edge Descriptor not found in I2C\n", __func__); 776 status = -ENODEV; 777 goto exit; 778 } 779 780 /* Read the descriptor data */ 781 status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc), 782 le16_to_cpu(rom_desc->Size), buffer); 783 if (status) 784 goto exit; 785 786 status = valid_csum(rom_desc, buffer); 787 788 desc = (struct edge_ti_manuf_descriptor *)buffer; 789 dev_dbg(dev, "%s - IonConfig 0x%x\n", __func__, desc->IonConfig); 790 dev_dbg(dev, "%s - Version %d\n", __func__, desc->Version); 791 dev_dbg(dev, "%s - Cpu/Board 0x%x\n", __func__, desc->CpuRev_BoardRev); 792 dev_dbg(dev, "%s - NumPorts %d\n", __func__, desc->NumPorts); 793 dev_dbg(dev, "%s - NumVirtualPorts %d\n", __func__, desc->NumVirtualPorts); 794 dev_dbg(dev, "%s - TotalPorts %d\n", __func__, desc->TotalPorts); 795 796 exit: 797 kfree(rom_desc); 798 return status; 799 } 800 801 /* Build firmware header used for firmware update */ 802 static int build_i2c_fw_hdr(u8 *header, const struct firmware *fw) 803 { 804 __u8 *buffer; 805 int buffer_size; 806 int i; 807 __u8 cs = 0; 808 struct ti_i2c_desc *i2c_header; 809 struct ti_i2c_image_header *img_header; 810 struct ti_i2c_firmware_rec *firmware_rec; 811 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data; 812 813 /* 814 * In order to update the I2C firmware we must change the type 2 record 815 * to type 0xF2. This will force the UMP to come up in Boot Mode. 816 * Then while in boot mode, the driver will download the latest 817 * firmware (padded to 15.5k) into the UMP ram. And finally when the 818 * device comes back up in download mode the driver will cause the new 819 * firmware to be copied from the UMP Ram to I2C and the firmware will 820 * update the record type from 0xf2 to 0x02. 821 */ 822 823 /* 824 * Allocate a 15.5k buffer + 2 bytes for version number (Firmware 825 * Record) 826 */ 827 buffer_size = (((1024 * 16) - 512 ) + 828 sizeof(struct ti_i2c_firmware_rec)); 829 830 buffer = kmalloc(buffer_size, GFP_KERNEL); 831 if (!buffer) 832 return -ENOMEM; 833 834 /* Set entire image of 0xffs */ 835 memset(buffer, 0xff, buffer_size); 836 837 /* Copy version number into firmware record */ 838 firmware_rec = (struct ti_i2c_firmware_rec *)buffer; 839 840 firmware_rec->Ver_Major = fw_hdr->major_version; 841 firmware_rec->Ver_Minor = fw_hdr->minor_version; 842 843 /* Pointer to fw_down memory image */ 844 img_header = (struct ti_i2c_image_header *)&fw->data[4]; 845 846 memcpy(buffer + sizeof(struct ti_i2c_firmware_rec), 847 &fw->data[4 + sizeof(struct ti_i2c_image_header)], 848 le16_to_cpu(img_header->Length)); 849 850 for (i=0; i < buffer_size; i++) { 851 cs = (__u8)(cs + buffer[i]); 852 } 853 854 kfree(buffer); 855 856 /* Build new header */ 857 i2c_header = (struct ti_i2c_desc *)header; 858 firmware_rec = (struct ti_i2c_firmware_rec*)i2c_header->Data; 859 860 i2c_header->Type = I2C_DESC_TYPE_FIRMWARE_BLANK; 861 i2c_header->Size = cpu_to_le16(buffer_size); 862 i2c_header->CheckSum = cs; 863 firmware_rec->Ver_Major = fw_hdr->major_version; 864 firmware_rec->Ver_Minor = fw_hdr->minor_version; 865 866 return 0; 867 } 868 869 /* Try to figure out what type of I2c we have */ 870 static int i2c_type_bootmode(struct edgeport_serial *serial) 871 { 872 struct device *dev = &serial->serial->dev->dev; 873 int status; 874 u8 *data; 875 876 data = kmalloc(1, GFP_KERNEL); 877 if (!data) 878 return -ENOMEM; 879 880 /* Try to read type 2 */ 881 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ, 882 DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01); 883 if (status) 884 dev_dbg(dev, "%s - read 2 status error = %d\n", __func__, status); 885 else 886 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data); 887 if ((!status) && (*data == UMP5152 || *data == UMP3410)) { 888 dev_dbg(dev, "%s - ROM_TYPE_II\n", __func__); 889 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 890 goto out; 891 } 892 893 /* Try to read type 3 */ 894 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ, 895 DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01); 896 if (status) 897 dev_dbg(dev, "%s - read 3 status error = %d\n", __func__, status); 898 else 899 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data); 900 if ((!status) && (*data == UMP5152 || *data == UMP3410)) { 901 dev_dbg(dev, "%s - ROM_TYPE_III\n", __func__); 902 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III; 903 goto out; 904 } 905 906 dev_dbg(dev, "%s - Unknown\n", __func__); 907 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 908 status = -ENODEV; 909 out: 910 kfree(data); 911 return status; 912 } 913 914 static int bulk_xfer(struct usb_serial *serial, void *buffer, 915 int length, int *num_sent) 916 { 917 int status; 918 919 status = usb_bulk_msg(serial->dev, 920 usb_sndbulkpipe(serial->dev, 921 serial->port[0]->bulk_out_endpointAddress), 922 buffer, length, num_sent, 1000); 923 return status; 924 } 925 926 /* Download given firmware image to the device (IN BOOT MODE) */ 927 static int download_code(struct edgeport_serial *serial, __u8 *image, 928 int image_length) 929 { 930 int status = 0; 931 int pos; 932 int transfer; 933 int done; 934 935 /* Transfer firmware image */ 936 for (pos = 0; pos < image_length; ) { 937 /* Read the next buffer from file */ 938 transfer = image_length - pos; 939 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE) 940 transfer = EDGE_FW_BULK_MAX_PACKET_SIZE; 941 942 /* Transfer data */ 943 status = bulk_xfer(serial->serial, &image[pos], 944 transfer, &done); 945 if (status) 946 break; 947 /* Advance buffer pointer */ 948 pos += done; 949 } 950 951 return status; 952 } 953 954 /* FIXME!!! */ 955 static int config_boot_dev(struct usb_device *dev) 956 { 957 return 0; 958 } 959 960 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc) 961 { 962 return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev); 963 } 964 965 static int check_fw_sanity(struct edgeport_serial *serial, 966 const struct firmware *fw) 967 { 968 u16 length_total; 969 u8 checksum = 0; 970 int pos; 971 struct device *dev = &serial->serial->interface->dev; 972 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data; 973 974 if (fw->size < sizeof(struct edgeport_fw_hdr)) { 975 dev_err(dev, "incomplete fw header\n"); 976 return -EINVAL; 977 } 978 979 length_total = le16_to_cpu(fw_hdr->length) + 980 sizeof(struct edgeport_fw_hdr); 981 982 if (fw->size != length_total) { 983 dev_err(dev, "bad fw size (expected: %u, got: %zu)\n", 984 length_total, fw->size); 985 return -EINVAL; 986 } 987 988 for (pos = sizeof(struct edgeport_fw_hdr); pos < fw->size; ++pos) 989 checksum += fw->data[pos]; 990 991 if (checksum != fw_hdr->checksum) { 992 dev_err(dev, "bad fw checksum (expected: 0x%x, got: 0x%x)\n", 993 fw_hdr->checksum, checksum); 994 return -EINVAL; 995 } 996 997 return 0; 998 } 999 1000 /* 1001 * DownloadTIFirmware - Download run-time operating firmware to the TI5052 1002 * 1003 * This routine downloads the main operating code into the TI5052, using the 1004 * boot code already burned into E2PROM or ROM. 1005 */ 1006 static int download_fw(struct edgeport_serial *serial) 1007 { 1008 struct device *dev = &serial->serial->interface->dev; 1009 int status = 0; 1010 struct usb_interface_descriptor *interface; 1011 const struct firmware *fw; 1012 const char *fw_name = "edgeport/down3.bin"; 1013 struct edgeport_fw_hdr *fw_hdr; 1014 1015 status = request_firmware(&fw, fw_name, dev); 1016 if (status) { 1017 dev_err(dev, "Failed to load image \"%s\" err %d\n", 1018 fw_name, status); 1019 return status; 1020 } 1021 1022 if (check_fw_sanity(serial, fw)) { 1023 status = -EINVAL; 1024 goto out; 1025 } 1026 1027 fw_hdr = (struct edgeport_fw_hdr *)fw->data; 1028 1029 /* If on-board version is newer, "fw_version" will be updated later. */ 1030 serial->fw_version = (fw_hdr->major_version << 8) + 1031 fw_hdr->minor_version; 1032 1033 /* 1034 * This routine is entered by both the BOOT mode and the Download mode 1035 * We can determine which code is running by the reading the config 1036 * descriptor and if we have only one bulk pipe it is in boot mode 1037 */ 1038 serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP; 1039 1040 /* Default to type 2 i2c */ 1041 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 1042 1043 status = choose_config(serial->serial->dev); 1044 if (status) 1045 goto out; 1046 1047 interface = &serial->serial->interface->cur_altsetting->desc; 1048 if (!interface) { 1049 dev_err(dev, "%s - no interface set, error!\n", __func__); 1050 status = -ENODEV; 1051 goto out; 1052 } 1053 1054 /* 1055 * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING 1056 * if we have more than one endpoint we are definitely in download 1057 * mode 1058 */ 1059 if (interface->bNumEndpoints > 1) { 1060 serial->product_info.TiMode = TI_MODE_DOWNLOAD; 1061 status = do_download_mode(serial, fw); 1062 } else { 1063 /* Otherwise we will remain in configuring mode */ 1064 serial->product_info.TiMode = TI_MODE_CONFIGURING; 1065 status = do_boot_mode(serial, fw); 1066 } 1067 1068 out: 1069 release_firmware(fw); 1070 return status; 1071 } 1072 1073 static int do_download_mode(struct edgeport_serial *serial, 1074 const struct firmware *fw) 1075 { 1076 struct device *dev = &serial->serial->interface->dev; 1077 int status = 0; 1078 int start_address; 1079 struct edge_ti_manuf_descriptor *ti_manuf_desc; 1080 int download_cur_ver; 1081 int download_new_ver; 1082 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data; 1083 struct ti_i2c_desc *rom_desc; 1084 1085 dev_dbg(dev, "%s - RUNNING IN DOWNLOAD MODE\n", __func__); 1086 1087 status = check_i2c_image(serial); 1088 if (status) { 1089 dev_dbg(dev, "%s - DOWNLOAD MODE -- BAD I2C\n", __func__); 1090 return status; 1091 } 1092 1093 /* 1094 * Validate Hardware version number 1095 * Read Manufacturing Descriptor from TI Based Edgeport 1096 */ 1097 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL); 1098 if (!ti_manuf_desc) 1099 return -ENOMEM; 1100 1101 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc); 1102 if (status) { 1103 kfree(ti_manuf_desc); 1104 return status; 1105 } 1106 1107 /* Check version number of ION descriptor */ 1108 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) { 1109 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n", 1110 __func__, ti_cpu_rev(ti_manuf_desc)); 1111 kfree(ti_manuf_desc); 1112 return -EINVAL; 1113 } 1114 1115 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 1116 if (!rom_desc) { 1117 kfree(ti_manuf_desc); 1118 return -ENOMEM; 1119 } 1120 1121 /* Search for type 2 record (firmware record) */ 1122 start_address = get_descriptor_addr(serial, 1123 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc); 1124 if (start_address != 0) { 1125 struct ti_i2c_firmware_rec *firmware_version; 1126 u8 *record; 1127 1128 dev_dbg(dev, "%s - Found Type FIRMWARE (Type 2) record\n", 1129 __func__); 1130 1131 firmware_version = kmalloc(sizeof(*firmware_version), 1132 GFP_KERNEL); 1133 if (!firmware_version) { 1134 kfree(rom_desc); 1135 kfree(ti_manuf_desc); 1136 return -ENOMEM; 1137 } 1138 1139 /* 1140 * Validate version number 1141 * Read the descriptor data 1142 */ 1143 status = read_rom(serial, start_address + 1144 sizeof(struct ti_i2c_desc), 1145 sizeof(struct ti_i2c_firmware_rec), 1146 (__u8 *)firmware_version); 1147 if (status) { 1148 kfree(firmware_version); 1149 kfree(rom_desc); 1150 kfree(ti_manuf_desc); 1151 return status; 1152 } 1153 1154 /* 1155 * Check version number of download with current 1156 * version in I2c 1157 */ 1158 download_cur_ver = (firmware_version->Ver_Major << 8) + 1159 (firmware_version->Ver_Minor); 1160 download_new_ver = (fw_hdr->major_version << 8) + 1161 (fw_hdr->minor_version); 1162 1163 dev_dbg(dev, "%s - >> FW Versions Device %d.%d Driver %d.%d\n", 1164 __func__, firmware_version->Ver_Major, 1165 firmware_version->Ver_Minor, 1166 fw_hdr->major_version, fw_hdr->minor_version); 1167 1168 /* 1169 * Check if we have an old version in the I2C and 1170 * update if necessary 1171 */ 1172 if (download_cur_ver < download_new_ver) { 1173 dev_dbg(dev, "%s - Update I2C dld from %d.%d to %d.%d\n", 1174 __func__, 1175 firmware_version->Ver_Major, 1176 firmware_version->Ver_Minor, 1177 fw_hdr->major_version, 1178 fw_hdr->minor_version); 1179 1180 record = kmalloc(1, GFP_KERNEL); 1181 if (!record) { 1182 kfree(firmware_version); 1183 kfree(rom_desc); 1184 kfree(ti_manuf_desc); 1185 return -ENOMEM; 1186 } 1187 /* 1188 * In order to update the I2C firmware we must 1189 * change the type 2 record to type 0xF2. This 1190 * will force the UMP to come up in Boot Mode. 1191 * Then while in boot mode, the driver will 1192 * download the latest firmware (padded to 1193 * 15.5k) into the UMP ram. Finally when the 1194 * device comes back up in download mode the 1195 * driver will cause the new firmware to be 1196 * copied from the UMP Ram to I2C and the 1197 * firmware will update the record type from 1198 * 0xf2 to 0x02. 1199 */ 1200 *record = I2C_DESC_TYPE_FIRMWARE_BLANK; 1201 1202 /* 1203 * Change the I2C Firmware record type to 1204 * 0xf2 to trigger an update 1205 */ 1206 status = write_rom(serial, start_address, 1207 sizeof(*record), record); 1208 if (status) { 1209 kfree(record); 1210 kfree(firmware_version); 1211 kfree(rom_desc); 1212 kfree(ti_manuf_desc); 1213 return status; 1214 } 1215 1216 /* 1217 * verify the write -- must do this in order 1218 * for write to complete before we do the 1219 * hardware reset 1220 */ 1221 status = read_rom(serial, 1222 start_address, 1223 sizeof(*record), 1224 record); 1225 if (status) { 1226 kfree(record); 1227 kfree(firmware_version); 1228 kfree(rom_desc); 1229 kfree(ti_manuf_desc); 1230 return status; 1231 } 1232 1233 if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) { 1234 dev_err(dev, "%s - error resetting device\n", 1235 __func__); 1236 kfree(record); 1237 kfree(firmware_version); 1238 kfree(rom_desc); 1239 kfree(ti_manuf_desc); 1240 return -ENODEV; 1241 } 1242 1243 dev_dbg(dev, "%s - HARDWARE RESET\n", __func__); 1244 1245 /* Reset UMP -- Back to BOOT MODE */ 1246 status = ti_vsend_sync(serial->serial->dev, 1247 UMPC_HARDWARE_RESET, 1248 0, 0, NULL, 0, 1249 TI_VSEND_TIMEOUT_DEFAULT); 1250 1251 dev_dbg(dev, "%s - HARDWARE RESET return %d\n", 1252 __func__, status); 1253 1254 /* return an error on purpose. */ 1255 kfree(record); 1256 kfree(firmware_version); 1257 kfree(rom_desc); 1258 kfree(ti_manuf_desc); 1259 return -ENODEV; 1260 } 1261 /* Same or newer fw version is already loaded */ 1262 serial->fw_version = download_cur_ver; 1263 kfree(firmware_version); 1264 } 1265 /* Search for type 0xF2 record (firmware blank record) */ 1266 else { 1267 start_address = get_descriptor_addr(serial, 1268 I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc); 1269 if (start_address != 0) { 1270 #define HEADER_SIZE (sizeof(struct ti_i2c_desc) + \ 1271 sizeof(struct ti_i2c_firmware_rec)) 1272 __u8 *header; 1273 __u8 *vheader; 1274 1275 header = kmalloc(HEADER_SIZE, GFP_KERNEL); 1276 if (!header) { 1277 kfree(rom_desc); 1278 kfree(ti_manuf_desc); 1279 return -ENOMEM; 1280 } 1281 1282 vheader = kmalloc(HEADER_SIZE, GFP_KERNEL); 1283 if (!vheader) { 1284 kfree(header); 1285 kfree(rom_desc); 1286 kfree(ti_manuf_desc); 1287 return -ENOMEM; 1288 } 1289 1290 dev_dbg(dev, "%s - Found Type BLANK FIRMWARE (Type F2) record\n", 1291 __func__); 1292 1293 /* 1294 * In order to update the I2C firmware we must change 1295 * the type 2 record to type 0xF2. This will force the 1296 * UMP to come up in Boot Mode. Then while in boot 1297 * mode, the driver will download the latest firmware 1298 * (padded to 15.5k) into the UMP ram. Finally when the 1299 * device comes back up in download mode the driver 1300 * will cause the new firmware to be copied from the 1301 * UMP Ram to I2C and the firmware will update the 1302 * record type from 0xf2 to 0x02. 1303 */ 1304 status = build_i2c_fw_hdr(header, fw); 1305 if (status) { 1306 kfree(vheader); 1307 kfree(header); 1308 kfree(rom_desc); 1309 kfree(ti_manuf_desc); 1310 return -EINVAL; 1311 } 1312 1313 /* 1314 * Update I2C with type 0xf2 record with correct 1315 * size and checksum 1316 */ 1317 status = write_rom(serial, 1318 start_address, 1319 HEADER_SIZE, 1320 header); 1321 if (status) { 1322 kfree(vheader); 1323 kfree(header); 1324 kfree(rom_desc); 1325 kfree(ti_manuf_desc); 1326 return -EINVAL; 1327 } 1328 1329 /* 1330 * verify the write -- must do this in order for 1331 * write to complete before we do the hardware reset 1332 */ 1333 status = read_rom(serial, start_address, 1334 HEADER_SIZE, vheader); 1335 1336 if (status) { 1337 dev_dbg(dev, "%s - can't read header back\n", 1338 __func__); 1339 kfree(vheader); 1340 kfree(header); 1341 kfree(rom_desc); 1342 kfree(ti_manuf_desc); 1343 return status; 1344 } 1345 if (memcmp(vheader, header, HEADER_SIZE)) { 1346 dev_dbg(dev, "%s - write download record failed\n", 1347 __func__); 1348 kfree(vheader); 1349 kfree(header); 1350 kfree(rom_desc); 1351 kfree(ti_manuf_desc); 1352 return -EINVAL; 1353 } 1354 1355 kfree(vheader); 1356 kfree(header); 1357 1358 dev_dbg(dev, "%s - Start firmware update\n", __func__); 1359 1360 /* Tell firmware to copy download image into I2C */ 1361 status = ti_vsend_sync(serial->serial->dev, 1362 UMPC_COPY_DNLD_TO_I2C, 1363 0, 0, NULL, 0, 1364 TI_VSEND_TIMEOUT_FW_DOWNLOAD); 1365 1366 dev_dbg(dev, "%s - Update complete 0x%x\n", __func__, 1367 status); 1368 if (status) { 1369 dev_err(dev, 1370 "%s - UMPC_COPY_DNLD_TO_I2C failed\n", 1371 __func__); 1372 kfree(rom_desc); 1373 kfree(ti_manuf_desc); 1374 return status; 1375 } 1376 } 1377 } 1378 1379 /* The device is running the download code */ 1380 kfree(rom_desc); 1381 kfree(ti_manuf_desc); 1382 return 0; 1383 } 1384 1385 static int do_boot_mode(struct edgeport_serial *serial, 1386 const struct firmware *fw) 1387 { 1388 struct device *dev = &serial->serial->interface->dev; 1389 int status = 0; 1390 struct edge_ti_manuf_descriptor *ti_manuf_desc; 1391 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data; 1392 1393 dev_dbg(dev, "%s - RUNNING IN BOOT MODE\n", __func__); 1394 1395 /* Configure the TI device so we can use the BULK pipes for download */ 1396 status = config_boot_dev(serial->serial->dev); 1397 if (status) 1398 return status; 1399 1400 if (le16_to_cpu(serial->serial->dev->descriptor.idVendor) 1401 != USB_VENDOR_ID_ION) { 1402 dev_dbg(dev, "%s - VID = 0x%x\n", __func__, 1403 le16_to_cpu(serial->serial->dev->descriptor.idVendor)); 1404 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 1405 goto stayinbootmode; 1406 } 1407 1408 /* 1409 * We have an ION device (I2c Must be programmed) 1410 * Determine I2C image type 1411 */ 1412 if (i2c_type_bootmode(serial)) 1413 goto stayinbootmode; 1414 1415 /* Check for ION Vendor ID and that the I2C is valid */ 1416 if (!check_i2c_image(serial)) { 1417 struct ti_i2c_image_header *header; 1418 int i; 1419 __u8 cs = 0; 1420 __u8 *buffer; 1421 int buffer_size; 1422 1423 /* 1424 * Validate Hardware version number 1425 * Read Manufacturing Descriptor from TI Based Edgeport 1426 */ 1427 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL); 1428 if (!ti_manuf_desc) 1429 return -ENOMEM; 1430 1431 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc); 1432 if (status) { 1433 kfree(ti_manuf_desc); 1434 goto stayinbootmode; 1435 } 1436 1437 /* Check for version 2 */ 1438 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) { 1439 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n", 1440 __func__, ti_cpu_rev(ti_manuf_desc)); 1441 kfree(ti_manuf_desc); 1442 goto stayinbootmode; 1443 } 1444 1445 kfree(ti_manuf_desc); 1446 1447 /* 1448 * In order to update the I2C firmware we must change the type 1449 * 2 record to type 0xF2. This will force the UMP to come up 1450 * in Boot Mode. Then while in boot mode, the driver will 1451 * download the latest firmware (padded to 15.5k) into the 1452 * UMP ram. Finally when the device comes back up in download 1453 * mode the driver will cause the new firmware to be copied 1454 * from the UMP Ram to I2C and the firmware will update the 1455 * record type from 0xf2 to 0x02. 1456 * 1457 * Do we really have to copy the whole firmware image, 1458 * or could we do this in place! 1459 */ 1460 1461 /* Allocate a 15.5k buffer + 3 byte header */ 1462 buffer_size = (((1024 * 16) - 512) + 1463 sizeof(struct ti_i2c_image_header)); 1464 buffer = kmalloc(buffer_size, GFP_KERNEL); 1465 if (!buffer) 1466 return -ENOMEM; 1467 1468 /* Initialize the buffer to 0xff (pad the buffer) */ 1469 memset(buffer, 0xff, buffer_size); 1470 memcpy(buffer, &fw->data[4], fw->size - 4); 1471 1472 for (i = sizeof(struct ti_i2c_image_header); 1473 i < buffer_size; i++) { 1474 cs = (__u8)(cs + buffer[i]); 1475 } 1476 1477 header = (struct ti_i2c_image_header *)buffer; 1478 1479 /* update length and checksum after padding */ 1480 header->Length = cpu_to_le16((__u16)(buffer_size - 1481 sizeof(struct ti_i2c_image_header))); 1482 header->CheckSum = cs; 1483 1484 /* Download the operational code */ 1485 dev_dbg(dev, "%s - Downloading operational code image version %d.%d (TI UMP)\n", 1486 __func__, 1487 fw_hdr->major_version, fw_hdr->minor_version); 1488 status = download_code(serial, buffer, buffer_size); 1489 1490 kfree(buffer); 1491 1492 if (status) { 1493 dev_dbg(dev, "%s - Error downloading operational code image\n", __func__); 1494 return status; 1495 } 1496 1497 /* Device will reboot */ 1498 serial->product_info.TiMode = TI_MODE_TRANSITIONING; 1499 1500 dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__); 1501 1502 return 1; 1503 } 1504 1505 stayinbootmode: 1506 /* Eprom is invalid or blank stay in boot mode */ 1507 dev_dbg(dev, "%s - STAYING IN BOOT MODE\n", __func__); 1508 serial->product_info.TiMode = TI_MODE_BOOT; 1509 1510 return 1; 1511 } 1512 1513 static int ti_do_config(struct edgeport_port *port, int feature, int on) 1514 { 1515 int port_number = port->port->port_number; 1516 1517 on = !!on; /* 1 or 0 not bitmask */ 1518 return send_cmd(port->port->serial->dev, 1519 feature, (__u8)(UMPM_UART1_PORT + port_number), 1520 on, NULL, 0); 1521 } 1522 1523 static int restore_mcr(struct edgeport_port *port, __u8 mcr) 1524 { 1525 int status = 0; 1526 1527 dev_dbg(&port->port->dev, "%s - %x\n", __func__, mcr); 1528 1529 status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR); 1530 if (status) 1531 return status; 1532 status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS); 1533 if (status) 1534 return status; 1535 return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK); 1536 } 1537 1538 /* Convert TI LSR to standard UART flags */ 1539 static __u8 map_line_status(__u8 ti_lsr) 1540 { 1541 __u8 lsr = 0; 1542 1543 #define MAP_FLAG(flagUmp, flagUart) \ 1544 if (ti_lsr & flagUmp) \ 1545 lsr |= flagUart; 1546 1547 MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR) /* overrun */ 1548 MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR) /* parity error */ 1549 MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR) /* framing error */ 1550 MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK) /* break detected */ 1551 MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL) /* rx data available */ 1552 MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY) /* tx hold reg empty */ 1553 1554 #undef MAP_FLAG 1555 1556 return lsr; 1557 } 1558 1559 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr) 1560 { 1561 struct async_icount *icount; 1562 struct tty_struct *tty; 1563 1564 dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, msr); 1565 1566 if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | 1567 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 1568 icount = &edge_port->port->icount; 1569 1570 /* update input line counters */ 1571 if (msr & EDGEPORT_MSR_DELTA_CTS) 1572 icount->cts++; 1573 if (msr & EDGEPORT_MSR_DELTA_DSR) 1574 icount->dsr++; 1575 if (msr & EDGEPORT_MSR_DELTA_CD) 1576 icount->dcd++; 1577 if (msr & EDGEPORT_MSR_DELTA_RI) 1578 icount->rng++; 1579 wake_up_interruptible(&edge_port->port->port.delta_msr_wait); 1580 } 1581 1582 /* Save the new modem status */ 1583 edge_port->shadow_msr = msr & 0xf0; 1584 1585 tty = tty_port_tty_get(&edge_port->port->port); 1586 /* handle CTS flow control */ 1587 if (tty && C_CRTSCTS(tty)) { 1588 if (msr & EDGEPORT_MSR_CTS) 1589 tty_wakeup(tty); 1590 } 1591 tty_kref_put(tty); 1592 } 1593 1594 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data, 1595 __u8 lsr, __u8 data) 1596 { 1597 struct async_icount *icount; 1598 __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | 1599 LSR_FRM_ERR | LSR_BREAK)); 1600 1601 dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr); 1602 1603 edge_port->shadow_lsr = lsr; 1604 1605 if (new_lsr & LSR_BREAK) 1606 /* 1607 * Parity and Framing errors only count if they 1608 * occur exclusive of a break being received. 1609 */ 1610 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 1611 1612 /* Place LSR data byte into Rx buffer */ 1613 if (lsr_data) 1614 edge_tty_recv(edge_port->port, &data, 1); 1615 1616 /* update input line counters */ 1617 icount = &edge_port->port->icount; 1618 if (new_lsr & LSR_BREAK) 1619 icount->brk++; 1620 if (new_lsr & LSR_OVER_ERR) 1621 icount->overrun++; 1622 if (new_lsr & LSR_PAR_ERR) 1623 icount->parity++; 1624 if (new_lsr & LSR_FRM_ERR) 1625 icount->frame++; 1626 } 1627 1628 static void edge_interrupt_callback(struct urb *urb) 1629 { 1630 struct edgeport_serial *edge_serial = urb->context; 1631 struct usb_serial_port *port; 1632 struct edgeport_port *edge_port; 1633 struct device *dev; 1634 unsigned char *data = urb->transfer_buffer; 1635 int length = urb->actual_length; 1636 int port_number; 1637 int function; 1638 int retval; 1639 __u8 lsr; 1640 __u8 msr; 1641 int status = urb->status; 1642 1643 switch (status) { 1644 case 0: 1645 /* success */ 1646 break; 1647 case -ECONNRESET: 1648 case -ENOENT: 1649 case -ESHUTDOWN: 1650 /* this urb is terminated, clean up */ 1651 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 1652 __func__, status); 1653 return; 1654 default: 1655 dev_err(&urb->dev->dev, "%s - nonzero urb status received: " 1656 "%d\n", __func__, status); 1657 goto exit; 1658 } 1659 1660 if (!length) { 1661 dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__); 1662 goto exit; 1663 } 1664 1665 dev = &edge_serial->serial->dev->dev; 1666 usb_serial_debug_data(dev, __func__, length, data); 1667 1668 if (length != 2) { 1669 dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length); 1670 goto exit; 1671 } 1672 1673 port_number = TIUMP_GET_PORT_FROM_CODE(data[0]); 1674 function = TIUMP_GET_FUNC_FROM_CODE(data[0]); 1675 dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__, 1676 port_number, function, data[1]); 1677 1678 if (port_number >= edge_serial->serial->num_ports) { 1679 dev_err(dev, "bad port number %d\n", port_number); 1680 goto exit; 1681 } 1682 1683 port = edge_serial->serial->port[port_number]; 1684 edge_port = usb_get_serial_port_data(port); 1685 if (!edge_port) { 1686 dev_dbg(dev, "%s - edge_port not found\n", __func__); 1687 return; 1688 } 1689 switch (function) { 1690 case TIUMP_INTERRUPT_CODE_LSR: 1691 lsr = map_line_status(data[1]); 1692 if (lsr & UMP_UART_LSR_DATA_MASK) { 1693 /* 1694 * Save the LSR event for bulk read completion routine 1695 */ 1696 dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n", 1697 __func__, port_number, lsr); 1698 edge_port->lsr_event = 1; 1699 edge_port->lsr_mask = lsr; 1700 } else { 1701 dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n", 1702 __func__, port_number, lsr); 1703 handle_new_lsr(edge_port, 0, lsr, 0); 1704 } 1705 break; 1706 1707 case TIUMP_INTERRUPT_CODE_MSR: /* MSR */ 1708 /* Copy MSR from UMP */ 1709 msr = data[1]; 1710 dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n", 1711 __func__, port_number, msr); 1712 handle_new_msr(edge_port, msr); 1713 break; 1714 1715 default: 1716 dev_err(&urb->dev->dev, 1717 "%s - Unknown Interrupt code from UMP %x\n", 1718 __func__, data[1]); 1719 break; 1720 1721 } 1722 1723 exit: 1724 retval = usb_submit_urb(urb, GFP_ATOMIC); 1725 if (retval) 1726 dev_err(&urb->dev->dev, 1727 "%s - usb_submit_urb failed with result %d\n", 1728 __func__, retval); 1729 } 1730 1731 static void edge_bulk_in_callback(struct urb *urb) 1732 { 1733 struct edgeport_port *edge_port = urb->context; 1734 struct device *dev = &edge_port->port->dev; 1735 unsigned char *data = urb->transfer_buffer; 1736 int retval = 0; 1737 int port_number; 1738 int status = urb->status; 1739 1740 switch (status) { 1741 case 0: 1742 /* success */ 1743 break; 1744 case -ECONNRESET: 1745 case -ENOENT: 1746 case -ESHUTDOWN: 1747 /* this urb is terminated, clean up */ 1748 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status); 1749 return; 1750 default: 1751 dev_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status); 1752 } 1753 1754 if (status == -EPIPE) 1755 goto exit; 1756 1757 if (status) { 1758 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__); 1759 return; 1760 } 1761 1762 port_number = edge_port->port->port_number; 1763 1764 if (urb->actual_length > 0 && edge_port->lsr_event) { 1765 edge_port->lsr_event = 0; 1766 dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n", 1767 __func__, port_number, edge_port->lsr_mask, *data); 1768 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data); 1769 /* Adjust buffer length/pointer */ 1770 --urb->actual_length; 1771 ++data; 1772 } 1773 1774 if (urb->actual_length) { 1775 usb_serial_debug_data(dev, __func__, urb->actual_length, data); 1776 if (edge_port->close_pending) 1777 dev_dbg(dev, "%s - close pending, dropping data on the floor\n", 1778 __func__); 1779 else 1780 edge_tty_recv(edge_port->port, data, 1781 urb->actual_length); 1782 edge_port->port->icount.rx += urb->actual_length; 1783 } 1784 1785 exit: 1786 /* continue read unless stopped */ 1787 spin_lock(&edge_port->ep_lock); 1788 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) 1789 retval = usb_submit_urb(urb, GFP_ATOMIC); 1790 else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) 1791 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED; 1792 1793 spin_unlock(&edge_port->ep_lock); 1794 if (retval) 1795 dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval); 1796 } 1797 1798 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, 1799 int length) 1800 { 1801 int queued; 1802 1803 queued = tty_insert_flip_string(&port->port, data, length); 1804 if (queued < length) 1805 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n", 1806 __func__, length - queued); 1807 tty_flip_buffer_push(&port->port); 1808 } 1809 1810 static void edge_bulk_out_callback(struct urb *urb) 1811 { 1812 struct usb_serial_port *port = urb->context; 1813 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1814 int status = urb->status; 1815 struct tty_struct *tty; 1816 1817 edge_port->ep_write_urb_in_use = 0; 1818 1819 switch (status) { 1820 case 0: 1821 /* success */ 1822 break; 1823 case -ECONNRESET: 1824 case -ENOENT: 1825 case -ESHUTDOWN: 1826 /* this urb is terminated, clean up */ 1827 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 1828 __func__, status); 1829 return; 1830 default: 1831 dev_err_console(port, "%s - nonzero write bulk status " 1832 "received: %d\n", __func__, status); 1833 } 1834 1835 /* send any buffered data */ 1836 tty = tty_port_tty_get(&port->port); 1837 edge_send(port, tty); 1838 tty_kref_put(tty); 1839 } 1840 1841 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port) 1842 { 1843 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1844 struct edgeport_serial *edge_serial; 1845 struct usb_device *dev; 1846 struct urb *urb; 1847 int port_number; 1848 int status; 1849 u16 open_settings; 1850 u8 transaction_timeout; 1851 1852 if (edge_port == NULL) 1853 return -ENODEV; 1854 1855 port_number = port->port_number; 1856 1857 dev = port->serial->dev; 1858 1859 /* turn off loopback */ 1860 status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0); 1861 if (status) { 1862 dev_err(&port->dev, 1863 "%s - cannot send clear loopback command, %d\n", 1864 __func__, status); 1865 return status; 1866 } 1867 1868 /* set up the port settings */ 1869 if (tty) 1870 edge_set_termios(tty, port, &tty->termios); 1871 1872 /* open up the port */ 1873 1874 /* milliseconds to timeout for DMA transfer */ 1875 transaction_timeout = 2; 1876 1877 edge_port->ump_read_timeout = 1878 max(20, ((transaction_timeout * 3) / 2)); 1879 1880 /* milliseconds to timeout for DMA transfer */ 1881 open_settings = (u8)(UMP_DMA_MODE_CONTINOUS | 1882 UMP_PIPE_TRANS_TIMEOUT_ENA | 1883 (transaction_timeout << 2)); 1884 1885 dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__); 1886 1887 /* Tell TI to open and start the port */ 1888 status = send_cmd(dev, UMPC_OPEN_PORT, 1889 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0); 1890 if (status) { 1891 dev_err(&port->dev, "%s - cannot send open command, %d\n", 1892 __func__, status); 1893 return status; 1894 } 1895 1896 /* Start the DMA? */ 1897 status = send_cmd(dev, UMPC_START_PORT, 1898 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0); 1899 if (status) { 1900 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n", 1901 __func__, status); 1902 return status; 1903 } 1904 1905 /* Clear TX and RX buffers in UMP */ 1906 status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN); 1907 if (status) { 1908 dev_err(&port->dev, 1909 "%s - cannot send clear buffers command, %d\n", 1910 __func__, status); 1911 return status; 1912 } 1913 1914 /* Read Initial MSR */ 1915 status = ti_vread_sync(dev, UMPC_READ_MSR, 0, 1916 (__u16)(UMPM_UART1_PORT + port_number), 1917 &edge_port->shadow_msr, 1); 1918 if (status) { 1919 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n", 1920 __func__, status); 1921 return status; 1922 } 1923 1924 dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr); 1925 1926 /* Set Initial MCR */ 1927 edge_port->shadow_mcr = MCR_RTS | MCR_DTR; 1928 dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr); 1929 1930 edge_serial = edge_port->edge_serial; 1931 if (mutex_lock_interruptible(&edge_serial->es_lock)) 1932 return -ERESTARTSYS; 1933 if (edge_serial->num_ports_open == 0) { 1934 /* we are the first port to open, post the interrupt urb */ 1935 urb = edge_serial->serial->port[0]->interrupt_in_urb; 1936 urb->context = edge_serial; 1937 status = usb_submit_urb(urb, GFP_KERNEL); 1938 if (status) { 1939 dev_err(&port->dev, 1940 "%s - usb_submit_urb failed with value %d\n", 1941 __func__, status); 1942 goto release_es_lock; 1943 } 1944 } 1945 1946 /* 1947 * reset the data toggle on the bulk endpoints to work around bug in 1948 * host controllers where things get out of sync some times 1949 */ 1950 usb_clear_halt(dev, port->write_urb->pipe); 1951 usb_clear_halt(dev, port->read_urb->pipe); 1952 1953 /* start up our bulk read urb */ 1954 urb = port->read_urb; 1955 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING; 1956 urb->context = edge_port; 1957 status = usb_submit_urb(urb, GFP_KERNEL); 1958 if (status) { 1959 dev_err(&port->dev, 1960 "%s - read bulk usb_submit_urb failed with value %d\n", 1961 __func__, status); 1962 goto unlink_int_urb; 1963 } 1964 1965 ++edge_serial->num_ports_open; 1966 1967 goto release_es_lock; 1968 1969 unlink_int_urb: 1970 if (edge_port->edge_serial->num_ports_open == 0) 1971 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 1972 release_es_lock: 1973 mutex_unlock(&edge_serial->es_lock); 1974 return status; 1975 } 1976 1977 static void edge_close(struct usb_serial_port *port) 1978 { 1979 struct edgeport_serial *edge_serial; 1980 struct edgeport_port *edge_port; 1981 struct usb_serial *serial = port->serial; 1982 unsigned long flags; 1983 int port_number; 1984 1985 edge_serial = usb_get_serial_data(port->serial); 1986 edge_port = usb_get_serial_port_data(port); 1987 if (edge_serial == NULL || edge_port == NULL) 1988 return; 1989 1990 /* 1991 * The bulkreadcompletion routine will check 1992 * this flag and dump add read data 1993 */ 1994 edge_port->close_pending = 1; 1995 1996 usb_kill_urb(port->read_urb); 1997 usb_kill_urb(port->write_urb); 1998 edge_port->ep_write_urb_in_use = 0; 1999 spin_lock_irqsave(&edge_port->ep_lock, flags); 2000 kfifo_reset_out(&port->write_fifo); 2001 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2002 2003 dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__); 2004 port_number = port->port_number; 2005 send_cmd(serial->dev, UMPC_CLOSE_PORT, 2006 (__u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0); 2007 2008 mutex_lock(&edge_serial->es_lock); 2009 --edge_port->edge_serial->num_ports_open; 2010 if (edge_port->edge_serial->num_ports_open <= 0) { 2011 /* last port is now closed, let's shut down our interrupt urb */ 2012 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 2013 edge_port->edge_serial->num_ports_open = 0; 2014 } 2015 mutex_unlock(&edge_serial->es_lock); 2016 edge_port->close_pending = 0; 2017 } 2018 2019 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 2020 const unsigned char *data, int count) 2021 { 2022 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2023 2024 if (count == 0) { 2025 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__); 2026 return 0; 2027 } 2028 2029 if (edge_port == NULL) 2030 return -ENODEV; 2031 if (edge_port->close_pending == 1) 2032 return -ENODEV; 2033 2034 count = kfifo_in_locked(&port->write_fifo, data, count, 2035 &edge_port->ep_lock); 2036 edge_send(port, tty); 2037 2038 return count; 2039 } 2040 2041 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty) 2042 { 2043 int count, result; 2044 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2045 unsigned long flags; 2046 2047 spin_lock_irqsave(&edge_port->ep_lock, flags); 2048 2049 if (edge_port->ep_write_urb_in_use) { 2050 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2051 return; 2052 } 2053 2054 count = kfifo_out(&port->write_fifo, 2055 port->write_urb->transfer_buffer, 2056 port->bulk_out_size); 2057 2058 if (count == 0) { 2059 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2060 return; 2061 } 2062 2063 edge_port->ep_write_urb_in_use = 1; 2064 2065 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2066 2067 usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer); 2068 2069 /* set up our urb */ 2070 port->write_urb->transfer_buffer_length = count; 2071 2072 /* send the data out the bulk port */ 2073 result = usb_submit_urb(port->write_urb, GFP_ATOMIC); 2074 if (result) { 2075 dev_err_console(port, 2076 "%s - failed submitting write urb, error %d\n", 2077 __func__, result); 2078 edge_port->ep_write_urb_in_use = 0; 2079 /* TODO: reschedule edge_send */ 2080 } else 2081 edge_port->port->icount.tx += count; 2082 2083 /* 2084 * wakeup any process waiting for writes to complete 2085 * there is now more room in the buffer for new writes 2086 */ 2087 if (tty) 2088 tty_wakeup(tty); 2089 } 2090 2091 static int edge_write_room(struct tty_struct *tty) 2092 { 2093 struct usb_serial_port *port = tty->driver_data; 2094 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2095 int room = 0; 2096 unsigned long flags; 2097 2098 if (edge_port == NULL) 2099 return 0; 2100 if (edge_port->close_pending == 1) 2101 return 0; 2102 2103 spin_lock_irqsave(&edge_port->ep_lock, flags); 2104 room = kfifo_avail(&port->write_fifo); 2105 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2106 2107 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); 2108 return room; 2109 } 2110 2111 static int edge_chars_in_buffer(struct tty_struct *tty) 2112 { 2113 struct usb_serial_port *port = tty->driver_data; 2114 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2115 int chars = 0; 2116 unsigned long flags; 2117 if (edge_port == NULL) 2118 return 0; 2119 2120 spin_lock_irqsave(&edge_port->ep_lock, flags); 2121 chars = kfifo_len(&port->write_fifo); 2122 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2123 2124 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 2125 return chars; 2126 } 2127 2128 static bool edge_tx_empty(struct usb_serial_port *port) 2129 { 2130 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2131 int ret; 2132 2133 ret = tx_active(edge_port); 2134 if (ret > 0) 2135 return false; 2136 2137 return true; 2138 } 2139 2140 static void edge_throttle(struct tty_struct *tty) 2141 { 2142 struct usb_serial_port *port = tty->driver_data; 2143 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2144 int status; 2145 2146 if (edge_port == NULL) 2147 return; 2148 2149 /* if we are implementing XON/XOFF, send the stop character */ 2150 if (I_IXOFF(tty)) { 2151 unsigned char stop_char = STOP_CHAR(tty); 2152 status = edge_write(tty, port, &stop_char, 1); 2153 if (status <= 0) { 2154 dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status); 2155 } 2156 } 2157 2158 /* 2159 * if we are implementing RTS/CTS, stop reads 2160 * and the Edgeport will clear the RTS line 2161 */ 2162 if (C_CRTSCTS(tty)) 2163 stop_read(edge_port); 2164 2165 } 2166 2167 static void edge_unthrottle(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 status; 2172 2173 if (edge_port == NULL) 2174 return; 2175 2176 /* if we are implementing XON/XOFF, send the start character */ 2177 if (I_IXOFF(tty)) { 2178 unsigned char start_char = START_CHAR(tty); 2179 status = edge_write(tty, port, &start_char, 1); 2180 if (status <= 0) { 2181 dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status); 2182 } 2183 } 2184 /* 2185 * if we are implementing RTS/CTS, restart reads 2186 * are the Edgeport will assert the RTS line 2187 */ 2188 if (C_CRTSCTS(tty)) { 2189 status = restart_read(edge_port); 2190 if (status) 2191 dev_err(&port->dev, 2192 "%s - read bulk usb_submit_urb failed: %d\n", 2193 __func__, status); 2194 } 2195 2196 } 2197 2198 static void stop_read(struct edgeport_port *edge_port) 2199 { 2200 unsigned long flags; 2201 2202 spin_lock_irqsave(&edge_port->ep_lock, flags); 2203 2204 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) 2205 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING; 2206 edge_port->shadow_mcr &= ~MCR_RTS; 2207 2208 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2209 } 2210 2211 static int restart_read(struct edgeport_port *edge_port) 2212 { 2213 struct urb *urb; 2214 int status = 0; 2215 unsigned long flags; 2216 2217 spin_lock_irqsave(&edge_port->ep_lock, flags); 2218 2219 if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) { 2220 urb = edge_port->port->read_urb; 2221 status = usb_submit_urb(urb, GFP_ATOMIC); 2222 } 2223 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING; 2224 edge_port->shadow_mcr |= MCR_RTS; 2225 2226 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2227 2228 return status; 2229 } 2230 2231 static void change_port_settings(struct tty_struct *tty, 2232 struct edgeport_port *edge_port, struct ktermios *old_termios) 2233 { 2234 struct device *dev = &edge_port->port->dev; 2235 struct ump_uart_config *config; 2236 int baud; 2237 unsigned cflag; 2238 int status; 2239 int port_number = edge_port->port->port_number; 2240 2241 config = kmalloc (sizeof (*config), GFP_KERNEL); 2242 if (!config) { 2243 tty->termios = *old_termios; 2244 return; 2245 } 2246 2247 cflag = tty->termios.c_cflag; 2248 2249 config->wFlags = 0; 2250 2251 /* These flags must be set */ 2252 config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT; 2253 config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR; 2254 config->bUartMode = (__u8)(edge_port->bUartMode); 2255 2256 switch (cflag & CSIZE) { 2257 case CS5: 2258 config->bDataBits = UMP_UART_CHAR5BITS; 2259 dev_dbg(dev, "%s - data bits = 5\n", __func__); 2260 break; 2261 case CS6: 2262 config->bDataBits = UMP_UART_CHAR6BITS; 2263 dev_dbg(dev, "%s - data bits = 6\n", __func__); 2264 break; 2265 case CS7: 2266 config->bDataBits = UMP_UART_CHAR7BITS; 2267 dev_dbg(dev, "%s - data bits = 7\n", __func__); 2268 break; 2269 default: 2270 case CS8: 2271 config->bDataBits = UMP_UART_CHAR8BITS; 2272 dev_dbg(dev, "%s - data bits = 8\n", __func__); 2273 break; 2274 } 2275 2276 if (cflag & PARENB) { 2277 if (cflag & PARODD) { 2278 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY; 2279 config->bParity = UMP_UART_ODDPARITY; 2280 dev_dbg(dev, "%s - parity = odd\n", __func__); 2281 } else { 2282 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY; 2283 config->bParity = UMP_UART_EVENPARITY; 2284 dev_dbg(dev, "%s - parity = even\n", __func__); 2285 } 2286 } else { 2287 config->bParity = UMP_UART_NOPARITY; 2288 dev_dbg(dev, "%s - parity = none\n", __func__); 2289 } 2290 2291 if (cflag & CSTOPB) { 2292 config->bStopBits = UMP_UART_STOPBIT2; 2293 dev_dbg(dev, "%s - stop bits = 2\n", __func__); 2294 } else { 2295 config->bStopBits = UMP_UART_STOPBIT1; 2296 dev_dbg(dev, "%s - stop bits = 1\n", __func__); 2297 } 2298 2299 /* figure out the flow control settings */ 2300 if (cflag & CRTSCTS) { 2301 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW; 2302 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW; 2303 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__); 2304 } else { 2305 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__); 2306 restart_read(edge_port); 2307 } 2308 2309 /* 2310 * if we are implementing XON/XOFF, set the start and stop 2311 * character in the device 2312 */ 2313 config->cXon = START_CHAR(tty); 2314 config->cXoff = STOP_CHAR(tty); 2315 2316 /* if we are implementing INBOUND XON/XOFF */ 2317 if (I_IXOFF(tty)) { 2318 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X; 2319 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", 2320 __func__, config->cXon, config->cXoff); 2321 } else 2322 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__); 2323 2324 /* if we are implementing OUTBOUND XON/XOFF */ 2325 if (I_IXON(tty)) { 2326 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X; 2327 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", 2328 __func__, config->cXon, config->cXoff); 2329 } else 2330 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__); 2331 2332 tty->termios.c_cflag &= ~CMSPAR; 2333 2334 /* Round the baud rate */ 2335 baud = tty_get_baud_rate(tty); 2336 if (!baud) { 2337 /* pick a default, any default... */ 2338 baud = 9600; 2339 } else { 2340 /* Avoid a zero divisor. */ 2341 baud = min(baud, 461550); 2342 tty_encode_baud_rate(tty, baud, baud); 2343 } 2344 2345 edge_port->baud_rate = baud; 2346 config->wBaudRate = (__u16)((461550L + baud/2) / baud); 2347 2348 /* FIXME: Recompute actual baud from divisor here */ 2349 2350 dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate); 2351 2352 dev_dbg(dev, "wBaudRate: %d\n", (int)(461550L / config->wBaudRate)); 2353 dev_dbg(dev, "wFlags: 0x%x\n", config->wFlags); 2354 dev_dbg(dev, "bDataBits: %d\n", config->bDataBits); 2355 dev_dbg(dev, "bParity: %d\n", config->bParity); 2356 dev_dbg(dev, "bStopBits: %d\n", config->bStopBits); 2357 dev_dbg(dev, "cXon: %d\n", config->cXon); 2358 dev_dbg(dev, "cXoff: %d\n", config->cXoff); 2359 dev_dbg(dev, "bUartMode: %d\n", config->bUartMode); 2360 2361 /* move the word values into big endian mode */ 2362 cpu_to_be16s(&config->wFlags); 2363 cpu_to_be16s(&config->wBaudRate); 2364 2365 status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG, 2366 (__u8)(UMPM_UART1_PORT + port_number), 2367 0, (__u8 *)config, sizeof(*config)); 2368 if (status) 2369 dev_dbg(dev, "%s - error %d when trying to write config to device\n", 2370 __func__, status); 2371 kfree(config); 2372 } 2373 2374 static void edge_set_termios(struct tty_struct *tty, 2375 struct usb_serial_port *port, struct ktermios *old_termios) 2376 { 2377 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2378 2379 if (edge_port == NULL) 2380 return; 2381 /* change the port settings to the new ones specified */ 2382 change_port_settings(tty, edge_port, old_termios); 2383 } 2384 2385 static int edge_tiocmset(struct tty_struct *tty, 2386 unsigned int set, unsigned int clear) 2387 { 2388 struct usb_serial_port *port = tty->driver_data; 2389 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2390 unsigned int mcr; 2391 unsigned long flags; 2392 2393 spin_lock_irqsave(&edge_port->ep_lock, flags); 2394 mcr = edge_port->shadow_mcr; 2395 if (set & TIOCM_RTS) 2396 mcr |= MCR_RTS; 2397 if (set & TIOCM_DTR) 2398 mcr |= MCR_DTR; 2399 if (set & TIOCM_LOOP) 2400 mcr |= MCR_LOOPBACK; 2401 2402 if (clear & TIOCM_RTS) 2403 mcr &= ~MCR_RTS; 2404 if (clear & TIOCM_DTR) 2405 mcr &= ~MCR_DTR; 2406 if (clear & TIOCM_LOOP) 2407 mcr &= ~MCR_LOOPBACK; 2408 2409 edge_port->shadow_mcr = mcr; 2410 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2411 2412 restore_mcr(edge_port, mcr); 2413 return 0; 2414 } 2415 2416 static int edge_tiocmget(struct tty_struct *tty) 2417 { 2418 struct usb_serial_port *port = tty->driver_data; 2419 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2420 unsigned int result = 0; 2421 unsigned int msr; 2422 unsigned int mcr; 2423 unsigned long flags; 2424 2425 spin_lock_irqsave(&edge_port->ep_lock, flags); 2426 2427 msr = edge_port->shadow_msr; 2428 mcr = edge_port->shadow_mcr; 2429 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 2430 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 2431 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 2432 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 2433 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 2434 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 2435 2436 2437 dev_dbg(&port->dev, "%s -- %x\n", __func__, result); 2438 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2439 2440 return result; 2441 } 2442 2443 static int get_serial_info(struct edgeport_port *edge_port, 2444 struct serial_struct __user *retinfo) 2445 { 2446 struct serial_struct tmp; 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 memset(&tmp, 0, sizeof(tmp)); 2454 2455 tmp.type = PORT_16550A; 2456 tmp.line = edge_port->port->minor; 2457 tmp.port = edge_port->port->port_number; 2458 tmp.irq = 0; 2459 tmp.xmit_fifo_size = edge_port->port->bulk_out_size; 2460 tmp.baud_base = 9600; 2461 tmp.close_delay = 5*HZ; 2462 tmp.closing_wait = cwait; 2463 2464 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2465 return -EFAULT; 2466 return 0; 2467 } 2468 2469 static int edge_ioctl(struct tty_struct *tty, 2470 unsigned int cmd, unsigned long arg) 2471 { 2472 struct usb_serial_port *port = tty->driver_data; 2473 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2474 2475 switch (cmd) { 2476 case TIOCGSERIAL: 2477 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__); 2478 return get_serial_info(edge_port, 2479 (struct serial_struct __user *) arg); 2480 } 2481 return -ENOIOCTLCMD; 2482 } 2483 2484 static void edge_break(struct tty_struct *tty, int break_state) 2485 { 2486 struct usb_serial_port *port = tty->driver_data; 2487 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2488 int status; 2489 int bv = 0; /* Off */ 2490 2491 if (break_state == -1) 2492 bv = 1; /* On */ 2493 status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv); 2494 if (status) 2495 dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n", 2496 __func__, status); 2497 } 2498 2499 static void edge_heartbeat_schedule(struct edgeport_serial *edge_serial) 2500 { 2501 if (!edge_serial->use_heartbeat) 2502 return; 2503 2504 schedule_delayed_work(&edge_serial->heartbeat_work, 2505 FW_HEARTBEAT_SECS * HZ); 2506 } 2507 2508 static void edge_heartbeat_work(struct work_struct *work) 2509 { 2510 struct edgeport_serial *serial; 2511 struct ti_i2c_desc *rom_desc; 2512 2513 serial = container_of(work, struct edgeport_serial, 2514 heartbeat_work.work); 2515 2516 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 2517 2518 /* Descriptor address request is enough to reset the firmware timer */ 2519 if (!rom_desc || !get_descriptor_addr(serial, I2C_DESC_TYPE_ION, 2520 rom_desc)) { 2521 dev_err(&serial->serial->interface->dev, 2522 "%s - Incomplete heartbeat\n", __func__); 2523 } 2524 kfree(rom_desc); 2525 2526 edge_heartbeat_schedule(serial); 2527 } 2528 2529 static int edge_calc_num_ports(struct usb_serial *serial, 2530 struct usb_serial_endpoints *epds) 2531 { 2532 struct device *dev = &serial->interface->dev; 2533 unsigned char num_ports = serial->type->num_ports; 2534 2535 /* Make sure we have the required endpoints when in download mode. */ 2536 if (serial->interface->cur_altsetting->desc.bNumEndpoints > 1) { 2537 if (epds->num_bulk_in < num_ports || 2538 epds->num_bulk_out < num_ports || 2539 epds->num_interrupt_in < 1) { 2540 dev_err(dev, "required endpoints missing\n"); 2541 return -ENODEV; 2542 } 2543 } 2544 2545 return num_ports; 2546 } 2547 2548 static int edge_startup(struct usb_serial *serial) 2549 { 2550 struct edgeport_serial *edge_serial; 2551 int status; 2552 u16 product_id; 2553 2554 /* create our private serial structure */ 2555 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); 2556 if (!edge_serial) 2557 return -ENOMEM; 2558 2559 mutex_init(&edge_serial->es_lock); 2560 edge_serial->serial = serial; 2561 INIT_DELAYED_WORK(&edge_serial->heartbeat_work, edge_heartbeat_work); 2562 usb_set_serial_data(serial, edge_serial); 2563 2564 status = download_fw(edge_serial); 2565 if (status < 0) { 2566 kfree(edge_serial); 2567 return status; 2568 } 2569 2570 if (status > 0) 2571 return 1; /* bind but do not register any ports */ 2572 2573 product_id = le16_to_cpu( 2574 edge_serial->serial->dev->descriptor.idProduct); 2575 2576 /* Currently only the EP/416 models require heartbeat support */ 2577 if (edge_serial->fw_version > FW_HEARTBEAT_VERSION_CUTOFF) { 2578 if (product_id == ION_DEVICE_ID_TI_EDGEPORT_416 || 2579 product_id == ION_DEVICE_ID_TI_EDGEPORT_416B) { 2580 edge_serial->use_heartbeat = true; 2581 } 2582 } 2583 2584 edge_heartbeat_schedule(edge_serial); 2585 2586 return 0; 2587 } 2588 2589 static void edge_disconnect(struct usb_serial *serial) 2590 { 2591 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 2592 2593 cancel_delayed_work_sync(&edge_serial->heartbeat_work); 2594 } 2595 2596 static void edge_release(struct usb_serial *serial) 2597 { 2598 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 2599 2600 cancel_delayed_work_sync(&edge_serial->heartbeat_work); 2601 kfree(edge_serial); 2602 } 2603 2604 static int edge_port_probe(struct usb_serial_port *port) 2605 { 2606 struct edgeport_port *edge_port; 2607 int ret; 2608 2609 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL); 2610 if (!edge_port) 2611 return -ENOMEM; 2612 2613 spin_lock_init(&edge_port->ep_lock); 2614 edge_port->port = port; 2615 edge_port->edge_serial = usb_get_serial_data(port->serial); 2616 edge_port->bUartMode = default_uart_mode; 2617 2618 switch (port->port_number) { 2619 case 0: 2620 edge_port->uart_base = UMPMEM_BASE_UART1; 2621 edge_port->dma_address = UMPD_OEDB1_ADDRESS; 2622 break; 2623 case 1: 2624 edge_port->uart_base = UMPMEM_BASE_UART2; 2625 edge_port->dma_address = UMPD_OEDB2_ADDRESS; 2626 break; 2627 default: 2628 dev_err(&port->dev, "unknown port number\n"); 2629 ret = -ENODEV; 2630 goto err; 2631 } 2632 2633 dev_dbg(&port->dev, 2634 "%s - port_number = %d, uart_base = %04x, dma_address = %04x\n", 2635 __func__, port->port_number, edge_port->uart_base, 2636 edge_port->dma_address); 2637 2638 usb_set_serial_port_data(port, edge_port); 2639 2640 ret = edge_create_sysfs_attrs(port); 2641 if (ret) 2642 goto err; 2643 2644 port->port.closing_wait = msecs_to_jiffies(closing_wait * 10); 2645 port->port.drain_delay = 1; 2646 2647 return 0; 2648 err: 2649 kfree(edge_port); 2650 2651 return ret; 2652 } 2653 2654 static int edge_port_remove(struct usb_serial_port *port) 2655 { 2656 struct edgeport_port *edge_port; 2657 2658 edge_port = usb_get_serial_port_data(port); 2659 edge_remove_sysfs_attrs(port); 2660 kfree(edge_port); 2661 2662 return 0; 2663 } 2664 2665 /* Sysfs Attributes */ 2666 2667 static ssize_t uart_mode_show(struct device *dev, 2668 struct device_attribute *attr, char *buf) 2669 { 2670 struct usb_serial_port *port = to_usb_serial_port(dev); 2671 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2672 2673 return sprintf(buf, "%d\n", edge_port->bUartMode); 2674 } 2675 2676 static ssize_t uart_mode_store(struct device *dev, 2677 struct device_attribute *attr, const char *valbuf, size_t count) 2678 { 2679 struct usb_serial_port *port = to_usb_serial_port(dev); 2680 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2681 unsigned int v = simple_strtoul(valbuf, NULL, 0); 2682 2683 dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v); 2684 2685 if (v < 256) 2686 edge_port->bUartMode = v; 2687 else 2688 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v); 2689 2690 return count; 2691 } 2692 static DEVICE_ATTR_RW(uart_mode); 2693 2694 static int edge_create_sysfs_attrs(struct usb_serial_port *port) 2695 { 2696 return device_create_file(&port->dev, &dev_attr_uart_mode); 2697 } 2698 2699 static int edge_remove_sysfs_attrs(struct usb_serial_port *port) 2700 { 2701 device_remove_file(&port->dev, &dev_attr_uart_mode); 2702 return 0; 2703 } 2704 2705 #ifdef CONFIG_PM 2706 static int edge_suspend(struct usb_serial *serial, pm_message_t message) 2707 { 2708 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 2709 2710 cancel_delayed_work_sync(&edge_serial->heartbeat_work); 2711 2712 return 0; 2713 } 2714 2715 static int edge_resume(struct usb_serial *serial) 2716 { 2717 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 2718 2719 edge_heartbeat_schedule(edge_serial); 2720 2721 return 0; 2722 } 2723 #endif 2724 2725 static struct usb_serial_driver edgeport_1port_device = { 2726 .driver = { 2727 .owner = THIS_MODULE, 2728 .name = "edgeport_ti_1", 2729 }, 2730 .description = "Edgeport TI 1 port adapter", 2731 .id_table = edgeport_1port_id_table, 2732 .num_ports = 1, 2733 .num_bulk_out = 1, 2734 .open = edge_open, 2735 .close = edge_close, 2736 .throttle = edge_throttle, 2737 .unthrottle = edge_unthrottle, 2738 .attach = edge_startup, 2739 .calc_num_ports = edge_calc_num_ports, 2740 .disconnect = edge_disconnect, 2741 .release = edge_release, 2742 .port_probe = edge_port_probe, 2743 .port_remove = edge_port_remove, 2744 .ioctl = edge_ioctl, 2745 .set_termios = edge_set_termios, 2746 .tiocmget = edge_tiocmget, 2747 .tiocmset = edge_tiocmset, 2748 .tiocmiwait = usb_serial_generic_tiocmiwait, 2749 .get_icount = usb_serial_generic_get_icount, 2750 .write = edge_write, 2751 .write_room = edge_write_room, 2752 .chars_in_buffer = edge_chars_in_buffer, 2753 .tx_empty = edge_tx_empty, 2754 .break_ctl = edge_break, 2755 .read_int_callback = edge_interrupt_callback, 2756 .read_bulk_callback = edge_bulk_in_callback, 2757 .write_bulk_callback = edge_bulk_out_callback, 2758 #ifdef CONFIG_PM 2759 .suspend = edge_suspend, 2760 .resume = edge_resume, 2761 #endif 2762 }; 2763 2764 static struct usb_serial_driver edgeport_2port_device = { 2765 .driver = { 2766 .owner = THIS_MODULE, 2767 .name = "edgeport_ti_2", 2768 }, 2769 .description = "Edgeport TI 2 port adapter", 2770 .id_table = edgeport_2port_id_table, 2771 .num_ports = 2, 2772 .num_bulk_out = 1, 2773 .open = edge_open, 2774 .close = edge_close, 2775 .throttle = edge_throttle, 2776 .unthrottle = edge_unthrottle, 2777 .attach = edge_startup, 2778 .calc_num_ports = edge_calc_num_ports, 2779 .disconnect = edge_disconnect, 2780 .release = edge_release, 2781 .port_probe = edge_port_probe, 2782 .port_remove = edge_port_remove, 2783 .ioctl = edge_ioctl, 2784 .set_termios = edge_set_termios, 2785 .tiocmget = edge_tiocmget, 2786 .tiocmset = edge_tiocmset, 2787 .tiocmiwait = usb_serial_generic_tiocmiwait, 2788 .get_icount = usb_serial_generic_get_icount, 2789 .write = edge_write, 2790 .write_room = edge_write_room, 2791 .chars_in_buffer = edge_chars_in_buffer, 2792 .tx_empty = edge_tx_empty, 2793 .break_ctl = edge_break, 2794 .read_int_callback = edge_interrupt_callback, 2795 .read_bulk_callback = edge_bulk_in_callback, 2796 .write_bulk_callback = edge_bulk_out_callback, 2797 #ifdef CONFIG_PM 2798 .suspend = edge_suspend, 2799 .resume = edge_resume, 2800 #endif 2801 }; 2802 2803 static struct usb_serial_driver * const serial_drivers[] = { 2804 &edgeport_1port_device, &edgeport_2port_device, NULL 2805 }; 2806 2807 module_usb_serial_driver(serial_drivers, id_table_combined); 2808 2809 MODULE_AUTHOR(DRIVER_AUTHOR); 2810 MODULE_DESCRIPTION(DRIVER_DESC); 2811 MODULE_LICENSE("GPL"); 2812 MODULE_FIRMWARE("edgeport/down3.bin"); 2813 2814 module_param(closing_wait, int, S_IRUGO | S_IWUSR); 2815 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs"); 2816 2817 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR); 2818 MODULE_PARM_DESC(ignore_cpu_rev, 2819 "Ignore the cpu revision when connecting to a device"); 2820 2821 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR); 2822 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ..."); 2823