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