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 /* 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 68 /* Product information read from the Edgeport */ 69 struct product_info { 70 int TiMode; /* Current TI Mode */ 71 __u8 hardware_type; /* Type of hardware */ 72 } __attribute__((packed)); 73 74 /* 75 * Edgeport firmware header 76 * 77 * "build_number" has been set to 0 in all three of the images I have 78 * seen, and Digi Tech Support suggests that it is safe to ignore it. 79 * 80 * "length" is the number of bytes of actual data following the header. 81 * 82 * "checksum" is the low order byte resulting from adding the values of 83 * all the data bytes. 84 */ 85 struct edgeport_fw_hdr { 86 u8 major_version; 87 u8 minor_version; 88 __le16 build_number; 89 __le16 length; 90 u8 checksum; 91 } __packed; 92 93 struct edgeport_port { 94 __u16 uart_base; 95 __u16 dma_address; 96 __u8 shadow_msr; 97 __u8 shadow_mcr; 98 __u8 shadow_lsr; 99 __u8 lsr_mask; 100 __u32 ump_read_timeout; /* Number of milliseconds the UMP will 101 wait without data before completing 102 a read short */ 103 int baud_rate; 104 int close_pending; 105 int lsr_event; 106 107 struct edgeport_serial *edge_serial; 108 struct usb_serial_port *port; 109 __u8 bUartMode; /* Port type, 0: RS232, etc. */ 110 spinlock_t ep_lock; 111 int ep_read_urb_state; 112 int ep_write_urb_in_use; 113 }; 114 115 struct edgeport_serial { 116 struct product_info product_info; 117 u8 TI_I2C_Type; /* Type of I2C in UMP */ 118 u8 TiReadI2C; /* Set to TRUE if we have read the 119 I2c in Boot Mode */ 120 struct mutex es_lock; 121 int num_ports_open; 122 struct usb_serial *serial; 123 struct delayed_work heartbeat_work; 124 int fw_version; 125 bool use_heartbeat; 126 }; 127 128 129 /* Devices that this driver supports */ 130 static const struct usb_device_id edgeport_1port_id_table[] = { 131 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) }, 132 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) }, 133 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) }, 134 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) }, 135 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) }, 136 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) }, 137 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) }, 138 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) }, 139 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) }, 140 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) }, 141 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) }, 142 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) }, 143 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) }, 144 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) }, 145 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) }, 146 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) }, 147 { } 148 }; 149 150 static const struct usb_device_id edgeport_2port_id_table[] = { 151 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) }, 152 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) }, 153 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) }, 154 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) }, 155 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) }, 156 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) }, 157 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) }, 158 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) }, 159 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) }, 160 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) }, 161 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) }, 162 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) }, 163 /* The 4, 8 and 16 port devices show up as multiple 2 port devices */ 164 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) }, 165 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) }, 166 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) }, 167 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) }, 168 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) }, 169 { } 170 }; 171 172 /* Devices that this driver supports */ 173 static const struct usb_device_id id_table_combined[] = { 174 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) }, 175 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) }, 176 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) }, 177 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) }, 178 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) }, 179 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) }, 180 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) }, 181 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) }, 182 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) }, 183 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) }, 184 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) }, 185 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) }, 186 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) }, 187 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) }, 188 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) }, 189 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) }, 190 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) }, 191 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) }, 192 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) }, 193 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) }, 194 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) }, 195 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) }, 196 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) }, 197 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) }, 198 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) }, 199 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) }, 200 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) }, 201 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) }, 202 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) }, 203 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) }, 204 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) }, 205 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) }, 206 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) }, 207 { } 208 }; 209 210 MODULE_DEVICE_TABLE(usb, id_table_combined); 211 212 static int closing_wait = EDGE_CLOSING_WAIT; 213 static bool ignore_cpu_rev; 214 static int default_uart_mode; /* RS232 */ 215 216 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, 217 int length); 218 219 static void stop_read(struct edgeport_port *edge_port); 220 static int restart_read(struct edgeport_port *edge_port); 221 222 static void edge_set_termios(struct tty_struct *tty, 223 struct usb_serial_port *port, struct ktermios *old_termios); 224 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty); 225 226 /* sysfs attributes */ 227 static int edge_create_sysfs_attrs(struct usb_serial_port *port); 228 static int edge_remove_sysfs_attrs(struct usb_serial_port *port); 229 230 /* 231 * Some release of Edgeport firmware "down3.bin" after version 4.80 232 * introduced code to automatically disconnect idle devices on some 233 * Edgeport models after periods of inactivity, typically ~60 seconds. 234 * This occurs without regard to whether ports on the device are open 235 * or not. Digi International Tech Support suggested: 236 * 237 * 1. Adding driver "heartbeat" code to reset the firmware timer by 238 * requesting a descriptor record every 15 seconds, which should be 239 * effective with newer firmware versions that require it, and benign 240 * with older versions that do not. In practice 40 seconds seems often 241 * enough. 242 * 2. The heartbeat code is currently required only on Edgeport/416 models. 243 */ 244 #define FW_HEARTBEAT_VERSION_CUTOFF ((4 << 8) + 80) 245 #define FW_HEARTBEAT_SECS 40 246 247 /* Timeouts in msecs: firmware downloads take longer */ 248 #define TI_VSEND_TIMEOUT_DEFAULT 1000 249 #define TI_VSEND_TIMEOUT_FW_DOWNLOAD 10000 250 251 static int ti_vread_sync(struct usb_device *dev, __u8 request, 252 __u16 value, __u16 index, u8 *data, int size) 253 { 254 int status; 255 256 status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request, 257 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN), 258 value, index, data, size, 1000); 259 if (status < 0) 260 return status; 261 if (status != size) { 262 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n", 263 __func__, size, status); 264 return -ECOMM; 265 } 266 return 0; 267 } 268 269 static int ti_vsend_sync(struct usb_device *dev, u8 request, u16 value, 270 u16 index, u8 *data, int size, int timeout) 271 { 272 int status; 273 274 status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request, 275 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT), 276 value, index, data, size, timeout); 277 if (status < 0) 278 return status; 279 if (status != size) { 280 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n", 281 __func__, size, status); 282 return -ECOMM; 283 } 284 return 0; 285 } 286 287 static int send_cmd(struct usb_device *dev, __u8 command, 288 __u8 moduleid, __u16 value, u8 *data, 289 int size) 290 { 291 return ti_vsend_sync(dev, command, value, moduleid, data, size, 292 TI_VSEND_TIMEOUT_DEFAULT); 293 } 294 295 /* clear tx/rx buffers and fifo in TI UMP */ 296 static int purge_port(struct usb_serial_port *port, __u16 mask) 297 { 298 int port_number = port->port_number; 299 300 dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask); 301 302 return send_cmd(port->serial->dev, 303 UMPC_PURGE_PORT, 304 (__u8)(UMPM_UART1_PORT + port_number), 305 mask, 306 NULL, 307 0); 308 } 309 310 /** 311 * read_download_mem - Read edgeport memory from TI chip 312 * @dev: usb device pointer 313 * @start_address: Device CPU address at which to read 314 * @length: Length of above data 315 * @address_type: Can read both XDATA and I2C 316 * @buffer: pointer to input data buffer 317 */ 318 static int read_download_mem(struct usb_device *dev, int start_address, 319 int length, __u8 address_type, __u8 *buffer) 320 { 321 int status = 0; 322 __u8 read_length; 323 u16 be_start_address; 324 325 dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, length); 326 327 /* Read in blocks of 64 bytes 328 * (TI firmware can't handle more than 64 byte reads) 329 */ 330 while (length) { 331 if (length > 64) 332 read_length = 64; 333 else 334 read_length = (__u8)length; 335 336 if (read_length > 1) { 337 dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, read_length); 338 } 339 /* 340 * NOTE: Must use swab as wIndex is sent in little-endian 341 * byte order regardless of host byte order. 342 */ 343 be_start_address = swab16((u16)start_address); 344 status = ti_vread_sync(dev, UMPC_MEMORY_READ, 345 (__u16)address_type, 346 be_start_address, 347 buffer, read_length); 348 349 if (status) { 350 dev_dbg(&dev->dev, "%s - ERROR %x\n", __func__, status); 351 return status; 352 } 353 354 if (read_length > 1) 355 usb_serial_debug_data(&dev->dev, __func__, read_length, buffer); 356 357 /* Update pointers/length */ 358 start_address += read_length; 359 buffer += read_length; 360 length -= read_length; 361 } 362 363 return status; 364 } 365 366 static int read_ram(struct usb_device *dev, int start_address, 367 int length, __u8 *buffer) 368 { 369 return read_download_mem(dev, start_address, length, 370 DTK_ADDR_SPACE_XDATA, buffer); 371 } 372 373 /* Read edgeport memory to a given block */ 374 static int read_boot_mem(struct edgeport_serial *serial, 375 int start_address, int length, __u8 *buffer) 376 { 377 int status = 0; 378 int i; 379 380 for (i = 0; i < length; i++) { 381 status = ti_vread_sync(serial->serial->dev, 382 UMPC_MEMORY_READ, serial->TI_I2C_Type, 383 (__u16)(start_address+i), &buffer[i], 0x01); 384 if (status) { 385 dev_dbg(&serial->serial->dev->dev, "%s - ERROR %x\n", __func__, status); 386 return status; 387 } 388 } 389 390 dev_dbg(&serial->serial->dev->dev, "%s - start_address = %x, length = %d\n", 391 __func__, start_address, length); 392 usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer); 393 394 serial->TiReadI2C = 1; 395 396 return status; 397 } 398 399 /* Write given block to TI EPROM memory */ 400 static int write_boot_mem(struct edgeport_serial *serial, 401 int start_address, int length, __u8 *buffer) 402 { 403 int status = 0; 404 int i; 405 u8 *temp; 406 407 /* Must do a read before write */ 408 if (!serial->TiReadI2C) { 409 temp = kmalloc(1, GFP_KERNEL); 410 if (!temp) 411 return -ENOMEM; 412 413 status = read_boot_mem(serial, 0, 1, temp); 414 kfree(temp); 415 if (status) 416 return status; 417 } 418 419 for (i = 0; i < length; ++i) { 420 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE, 421 buffer[i], (u16)(i + start_address), NULL, 422 0, TI_VSEND_TIMEOUT_DEFAULT); 423 if (status) 424 return status; 425 } 426 427 dev_dbg(&serial->serial->dev->dev, "%s - start_sddr = %x, length = %d\n", __func__, start_address, length); 428 usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer); 429 430 return status; 431 } 432 433 434 /* Write edgeport I2C memory to TI chip */ 435 static int write_i2c_mem(struct edgeport_serial *serial, 436 int start_address, int length, __u8 address_type, __u8 *buffer) 437 { 438 struct device *dev = &serial->serial->dev->dev; 439 int status = 0; 440 int write_length; 441 u16 be_start_address; 442 443 /* We can only send a maximum of 1 aligned byte page at a time */ 444 445 /* calculate the number of bytes left in the first page */ 446 write_length = EPROM_PAGE_SIZE - 447 (start_address & (EPROM_PAGE_SIZE - 1)); 448 449 if (write_length > length) 450 write_length = length; 451 452 dev_dbg(dev, "%s - BytesInFirstPage Addr = %x, length = %d\n", 453 __func__, start_address, write_length); 454 usb_serial_debug_data(dev, __func__, write_length, buffer); 455 456 /* 457 * Write first page. 458 * 459 * NOTE: Must use swab as wIndex is sent in little-endian byte order 460 * regardless of host byte order. 461 */ 462 be_start_address = swab16((u16)start_address); 463 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE, 464 (u16)address_type, be_start_address, 465 buffer, write_length, TI_VSEND_TIMEOUT_DEFAULT); 466 if (status) { 467 dev_dbg(dev, "%s - ERROR %d\n", __func__, status); 468 return status; 469 } 470 471 length -= write_length; 472 start_address += write_length; 473 buffer += write_length; 474 475 /* We should be aligned now -- can write 476 max page size bytes at a time */ 477 while (length) { 478 if (length > EPROM_PAGE_SIZE) 479 write_length = EPROM_PAGE_SIZE; 480 else 481 write_length = length; 482 483 dev_dbg(dev, "%s - Page Write Addr = %x, length = %d\n", 484 __func__, start_address, write_length); 485 usb_serial_debug_data(dev, __func__, write_length, buffer); 486 487 /* 488 * Write next page. 489 * 490 * NOTE: Must use swab as wIndex is sent in little-endian byte 491 * order regardless of host byte order. 492 */ 493 be_start_address = swab16((u16)start_address); 494 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE, 495 (u16)address_type, be_start_address, buffer, 496 write_length, TI_VSEND_TIMEOUT_DEFAULT); 497 if (status) { 498 dev_err(dev, "%s - ERROR %d\n", __func__, status); 499 return status; 500 } 501 502 length -= write_length; 503 start_address += write_length; 504 buffer += write_length; 505 } 506 return status; 507 } 508 509 /* Examine the UMP DMA registers and LSR 510 * 511 * Check the MSBit of the X and Y DMA byte count registers. 512 * A zero in this bit indicates that the TX DMA buffers are empty 513 * then check the TX Empty bit in the UART. 514 */ 515 static int tx_active(struct edgeport_port *port) 516 { 517 int status; 518 struct out_endpoint_desc_block *oedb; 519 __u8 *lsr; 520 int bytes_left = 0; 521 522 oedb = kmalloc(sizeof(*oedb), GFP_KERNEL); 523 if (!oedb) 524 return -ENOMEM; 525 526 lsr = kmalloc(1, GFP_KERNEL); /* Sigh, that's right, just one byte, 527 as not all platforms can do DMA 528 from stack */ 529 if (!lsr) { 530 kfree(oedb); 531 return -ENOMEM; 532 } 533 /* Read the DMA Count Registers */ 534 status = read_ram(port->port->serial->dev, port->dma_address, 535 sizeof(*oedb), (void *)oedb); 536 if (status) 537 goto exit_is_tx_active; 538 539 dev_dbg(&port->port->dev, "%s - XByteCount 0x%X\n", __func__, oedb->XByteCount); 540 541 /* and the LSR */ 542 status = read_ram(port->port->serial->dev, 543 port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr); 544 545 if (status) 546 goto exit_is_tx_active; 547 dev_dbg(&port->port->dev, "%s - LSR = 0x%X\n", __func__, *lsr); 548 549 /* If either buffer has data or we are transmitting then return TRUE */ 550 if ((oedb->XByteCount & 0x80) != 0) 551 bytes_left += 64; 552 553 if ((*lsr & UMP_UART_LSR_TX_MASK) == 0) 554 bytes_left += 1; 555 556 /* We return Not Active if we get any kind of error */ 557 exit_is_tx_active: 558 dev_dbg(&port->port->dev, "%s - return %d\n", __func__, bytes_left); 559 560 kfree(lsr); 561 kfree(oedb); 562 return bytes_left; 563 } 564 565 static int choose_config(struct usb_device *dev) 566 { 567 /* 568 * There may be multiple configurations on this device, in which case 569 * we would need to read and parse all of them to find out which one 570 * we want. However, we just support one config at this point, 571 * configuration # 1, which is Config Descriptor 0. 572 */ 573 574 dev_dbg(&dev->dev, "%s - Number of Interfaces = %d\n", 575 __func__, dev->config->desc.bNumInterfaces); 576 dev_dbg(&dev->dev, "%s - MAX Power = %d\n", 577 __func__, dev->config->desc.bMaxPower * 2); 578 579 if (dev->config->desc.bNumInterfaces != 1) { 580 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __func__); 581 return -ENODEV; 582 } 583 584 return 0; 585 } 586 587 static int read_rom(struct edgeport_serial *serial, 588 int start_address, int length, __u8 *buffer) 589 { 590 int status; 591 592 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) { 593 status = read_download_mem(serial->serial->dev, 594 start_address, 595 length, 596 serial->TI_I2C_Type, 597 buffer); 598 } else { 599 status = read_boot_mem(serial, start_address, length, 600 buffer); 601 } 602 return status; 603 } 604 605 static int write_rom(struct edgeport_serial *serial, int start_address, 606 int length, __u8 *buffer) 607 { 608 if (serial->product_info.TiMode == TI_MODE_BOOT) 609 return write_boot_mem(serial, start_address, length, 610 buffer); 611 612 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) 613 return write_i2c_mem(serial, start_address, length, 614 serial->TI_I2C_Type, buffer); 615 return -EINVAL; 616 } 617 618 619 620 /* Read a descriptor header from I2C based on type */ 621 static int get_descriptor_addr(struct edgeport_serial *serial, 622 int desc_type, struct ti_i2c_desc *rom_desc) 623 { 624 int start_address; 625 int status; 626 627 /* Search for requested descriptor in I2C */ 628 start_address = 2; 629 do { 630 status = read_rom(serial, 631 start_address, 632 sizeof(struct ti_i2c_desc), 633 (__u8 *)rom_desc); 634 if (status) 635 return 0; 636 637 if (rom_desc->Type == desc_type) 638 return start_address; 639 640 start_address = start_address + sizeof(struct ti_i2c_desc) + 641 le16_to_cpu(rom_desc->Size); 642 643 } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type); 644 645 return 0; 646 } 647 648 /* Validate descriptor checksum */ 649 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer) 650 { 651 __u16 i; 652 __u8 cs = 0; 653 654 for (i = 0; i < le16_to_cpu(rom_desc->Size); i++) 655 cs = (__u8)(cs + buffer[i]); 656 657 if (cs != rom_desc->CheckSum) { 658 pr_debug("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs); 659 return -EINVAL; 660 } 661 return 0; 662 } 663 664 /* Make sure that the I2C image is good */ 665 static int check_i2c_image(struct edgeport_serial *serial) 666 { 667 struct device *dev = &serial->serial->dev->dev; 668 int status = 0; 669 struct ti_i2c_desc *rom_desc; 670 int start_address = 2; 671 __u8 *buffer; 672 __u16 ttype; 673 674 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 675 if (!rom_desc) 676 return -ENOMEM; 677 678 buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL); 679 if (!buffer) { 680 kfree(rom_desc); 681 return -ENOMEM; 682 } 683 684 /* Read the first byte (Signature0) must be 0x52 or 0x10 */ 685 status = read_rom(serial, 0, 1, buffer); 686 if (status) 687 goto out; 688 689 if (*buffer != UMP5152 && *buffer != UMP3410) { 690 dev_err(dev, "%s - invalid buffer signature\n", __func__); 691 status = -ENODEV; 692 goto out; 693 } 694 695 do { 696 /* Validate the I2C */ 697 status = read_rom(serial, 698 start_address, 699 sizeof(struct ti_i2c_desc), 700 (__u8 *)rom_desc); 701 if (status) 702 break; 703 704 if ((start_address + sizeof(struct ti_i2c_desc) + 705 le16_to_cpu(rom_desc->Size)) > TI_MAX_I2C_SIZE) { 706 status = -ENODEV; 707 dev_dbg(dev, "%s - structure too big, erroring out.\n", __func__); 708 break; 709 } 710 711 dev_dbg(dev, "%s Type = 0x%x\n", __func__, rom_desc->Type); 712 713 /* Skip type 2 record */ 714 ttype = rom_desc->Type & 0x0f; 715 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC 716 && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) { 717 /* Read the descriptor data */ 718 status = read_rom(serial, start_address + 719 sizeof(struct ti_i2c_desc), 720 le16_to_cpu(rom_desc->Size), 721 buffer); 722 if (status) 723 break; 724 725 status = valid_csum(rom_desc, buffer); 726 if (status) 727 break; 728 } 729 start_address = start_address + sizeof(struct ti_i2c_desc) + 730 le16_to_cpu(rom_desc->Size); 731 732 } while ((rom_desc->Type != I2C_DESC_TYPE_ION) && 733 (start_address < TI_MAX_I2C_SIZE)); 734 735 if ((rom_desc->Type != I2C_DESC_TYPE_ION) || 736 (start_address > TI_MAX_I2C_SIZE)) 737 status = -ENODEV; 738 739 out: 740 kfree(buffer); 741 kfree(rom_desc); 742 return status; 743 } 744 745 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer) 746 { 747 int status; 748 int start_address; 749 struct ti_i2c_desc *rom_desc; 750 struct edge_ti_manuf_descriptor *desc; 751 struct device *dev = &serial->serial->dev->dev; 752 753 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 754 if (!rom_desc) 755 return -ENOMEM; 756 757 start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION, 758 rom_desc); 759 760 if (!start_address) { 761 dev_dbg(dev, "%s - Edge Descriptor not found in I2C\n", __func__); 762 status = -ENODEV; 763 goto exit; 764 } 765 766 /* Read the descriptor data */ 767 status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc), 768 le16_to_cpu(rom_desc->Size), buffer); 769 if (status) 770 goto exit; 771 772 status = valid_csum(rom_desc, buffer); 773 774 desc = (struct edge_ti_manuf_descriptor *)buffer; 775 dev_dbg(dev, "%s - IonConfig 0x%x\n", __func__, desc->IonConfig); 776 dev_dbg(dev, "%s - Version %d\n", __func__, desc->Version); 777 dev_dbg(dev, "%s - Cpu/Board 0x%x\n", __func__, desc->CpuRev_BoardRev); 778 dev_dbg(dev, "%s - NumPorts %d\n", __func__, desc->NumPorts); 779 dev_dbg(dev, "%s - NumVirtualPorts %d\n", __func__, desc->NumVirtualPorts); 780 dev_dbg(dev, "%s - TotalPorts %d\n", __func__, desc->TotalPorts); 781 782 exit: 783 kfree(rom_desc); 784 return status; 785 } 786 787 /* Build firmware header used for firmware update */ 788 static int build_i2c_fw_hdr(u8 *header, struct device *dev, 789 const struct firmware *fw) 790 { 791 __u8 *buffer; 792 int buffer_size; 793 int i; 794 __u8 cs = 0; 795 struct ti_i2c_desc *i2c_header; 796 struct ti_i2c_image_header *img_header; 797 struct ti_i2c_firmware_rec *firmware_rec; 798 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data; 799 800 /* In order to update the I2C firmware we must change the type 2 record 801 * to type 0xF2. This will force the UMP to come up in Boot Mode. 802 * Then while in boot mode, the driver will download the latest 803 * firmware (padded to 15.5k) into the UMP ram. And finally when the 804 * device comes back up in download mode the driver will cause the new 805 * firmware to be copied from the UMP Ram to I2C and the firmware will 806 * update the record type from 0xf2 to 0x02. 807 */ 808 809 /* Allocate a 15.5k buffer + 2 bytes for version number 810 * (Firmware Record) */ 811 buffer_size = (((1024 * 16) - 512 ) + 812 sizeof(struct ti_i2c_firmware_rec)); 813 814 buffer = kmalloc(buffer_size, GFP_KERNEL); 815 if (!buffer) 816 return -ENOMEM; 817 818 // Set entire image of 0xffs 819 memset(buffer, 0xff, buffer_size); 820 821 /* Copy version number into firmware record */ 822 firmware_rec = (struct ti_i2c_firmware_rec *)buffer; 823 824 firmware_rec->Ver_Major = fw_hdr->major_version; 825 firmware_rec->Ver_Minor = fw_hdr->minor_version; 826 827 /* Pointer to fw_down memory image */ 828 img_header = (struct ti_i2c_image_header *)&fw->data[4]; 829 830 memcpy(buffer + sizeof(struct ti_i2c_firmware_rec), 831 &fw->data[4 + sizeof(struct ti_i2c_image_header)], 832 le16_to_cpu(img_header->Length)); 833 834 for (i=0; i < buffer_size; i++) { 835 cs = (__u8)(cs + buffer[i]); 836 } 837 838 kfree(buffer); 839 840 /* Build new header */ 841 i2c_header = (struct ti_i2c_desc *)header; 842 firmware_rec = (struct ti_i2c_firmware_rec*)i2c_header->Data; 843 844 i2c_header->Type = I2C_DESC_TYPE_FIRMWARE_BLANK; 845 i2c_header->Size = cpu_to_le16(buffer_size); 846 i2c_header->CheckSum = cs; 847 firmware_rec->Ver_Major = fw_hdr->major_version; 848 firmware_rec->Ver_Minor = fw_hdr->minor_version; 849 850 return 0; 851 } 852 853 /* Try to figure out what type of I2c we have */ 854 static int i2c_type_bootmode(struct edgeport_serial *serial) 855 { 856 struct device *dev = &serial->serial->dev->dev; 857 int status; 858 u8 *data; 859 860 data = kmalloc(1, GFP_KERNEL); 861 if (!data) 862 return -ENOMEM; 863 864 /* Try to read type 2 */ 865 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ, 866 DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01); 867 if (status) 868 dev_dbg(dev, "%s - read 2 status error = %d\n", __func__, status); 869 else 870 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data); 871 if ((!status) && (*data == UMP5152 || *data == UMP3410)) { 872 dev_dbg(dev, "%s - ROM_TYPE_II\n", __func__); 873 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 874 goto out; 875 } 876 877 /* Try to read type 3 */ 878 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ, 879 DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01); 880 if (status) 881 dev_dbg(dev, "%s - read 3 status error = %d\n", __func__, status); 882 else 883 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data); 884 if ((!status) && (*data == UMP5152 || *data == UMP3410)) { 885 dev_dbg(dev, "%s - ROM_TYPE_III\n", __func__); 886 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III; 887 goto out; 888 } 889 890 dev_dbg(dev, "%s - Unknown\n", __func__); 891 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 892 status = -ENODEV; 893 out: 894 kfree(data); 895 return status; 896 } 897 898 static int bulk_xfer(struct usb_serial *serial, void *buffer, 899 int length, int *num_sent) 900 { 901 int status; 902 903 status = usb_bulk_msg(serial->dev, 904 usb_sndbulkpipe(serial->dev, 905 serial->port[0]->bulk_out_endpointAddress), 906 buffer, length, num_sent, 1000); 907 return status; 908 } 909 910 /* Download given firmware image to the device (IN BOOT MODE) */ 911 static int download_code(struct edgeport_serial *serial, __u8 *image, 912 int image_length) 913 { 914 int status = 0; 915 int pos; 916 int transfer; 917 int done; 918 919 /* Transfer firmware image */ 920 for (pos = 0; pos < image_length; ) { 921 /* Read the next buffer from file */ 922 transfer = image_length - pos; 923 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE) 924 transfer = EDGE_FW_BULK_MAX_PACKET_SIZE; 925 926 /* Transfer data */ 927 status = bulk_xfer(serial->serial, &image[pos], 928 transfer, &done); 929 if (status) 930 break; 931 /* Advance buffer pointer */ 932 pos += done; 933 } 934 935 return status; 936 } 937 938 /* FIXME!!! */ 939 static int config_boot_dev(struct usb_device *dev) 940 { 941 return 0; 942 } 943 944 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc) 945 { 946 return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev); 947 } 948 949 static int check_fw_sanity(struct edgeport_serial *serial, 950 const struct firmware *fw) 951 { 952 u16 length_total; 953 u8 checksum = 0; 954 int pos; 955 struct device *dev = &serial->serial->interface->dev; 956 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data; 957 958 if (fw->size < sizeof(struct edgeport_fw_hdr)) { 959 dev_err(dev, "incomplete fw header\n"); 960 return -EINVAL; 961 } 962 963 length_total = le16_to_cpu(fw_hdr->length) + 964 sizeof(struct edgeport_fw_hdr); 965 966 if (fw->size != length_total) { 967 dev_err(dev, "bad fw size (expected: %u, got: %zu)\n", 968 length_total, fw->size); 969 return -EINVAL; 970 } 971 972 for (pos = sizeof(struct edgeport_fw_hdr); pos < fw->size; ++pos) 973 checksum += fw->data[pos]; 974 975 if (checksum != fw_hdr->checksum) { 976 dev_err(dev, "bad fw checksum (expected: 0x%x, got: 0x%x)\n", 977 fw_hdr->checksum, checksum); 978 return -EINVAL; 979 } 980 981 return 0; 982 } 983 984 /** 985 * DownloadTIFirmware - Download run-time operating firmware to the TI5052 986 * 987 * This routine downloads the main operating code into the TI5052, using the 988 * boot code already burned into E2PROM or ROM. 989 */ 990 static int download_fw(struct edgeport_serial *serial, 991 const struct firmware *fw) 992 { 993 struct device *dev = &serial->serial->dev->dev; 994 int status = 0; 995 int start_address; 996 struct edge_ti_manuf_descriptor *ti_manuf_desc; 997 struct usb_interface_descriptor *interface; 998 int download_cur_ver; 999 int download_new_ver; 1000 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data; 1001 1002 if (check_fw_sanity(serial, fw)) 1003 return -EINVAL; 1004 1005 /* If on-board version is newer, "fw_version" will be updated below. */ 1006 serial->fw_version = (fw_hdr->major_version << 8) + 1007 fw_hdr->minor_version; 1008 1009 /* This routine is entered by both the BOOT mode and the Download mode 1010 * We can determine which code is running by the reading the config 1011 * descriptor and if we have only one bulk pipe it is in boot mode 1012 */ 1013 serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP; 1014 1015 /* Default to type 2 i2c */ 1016 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 1017 1018 status = choose_config(serial->serial->dev); 1019 if (status) 1020 return status; 1021 1022 interface = &serial->serial->interface->cur_altsetting->desc; 1023 if (!interface) { 1024 dev_err(dev, "%s - no interface set, error!\n", __func__); 1025 return -ENODEV; 1026 } 1027 1028 /* 1029 * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING 1030 * if we have more than one endpoint we are definitely in download 1031 * mode 1032 */ 1033 if (interface->bNumEndpoints > 1) 1034 serial->product_info.TiMode = TI_MODE_DOWNLOAD; 1035 else 1036 /* Otherwise we will remain in configuring mode */ 1037 serial->product_info.TiMode = TI_MODE_CONFIGURING; 1038 1039 /********************************************************************/ 1040 /* Download Mode */ 1041 /********************************************************************/ 1042 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) { 1043 struct ti_i2c_desc *rom_desc; 1044 1045 dev_dbg(dev, "%s - RUNNING IN DOWNLOAD MODE\n", __func__); 1046 1047 status = check_i2c_image(serial); 1048 if (status) { 1049 dev_dbg(dev, "%s - DOWNLOAD MODE -- BAD I2C\n", __func__); 1050 return status; 1051 } 1052 1053 /* Validate Hardware version number 1054 * Read Manufacturing Descriptor from TI Based Edgeport 1055 */ 1056 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL); 1057 if (!ti_manuf_desc) 1058 return -ENOMEM; 1059 1060 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc); 1061 if (status) { 1062 kfree(ti_manuf_desc); 1063 return status; 1064 } 1065 1066 /* Check version number of ION descriptor */ 1067 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) { 1068 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n", 1069 __func__, ti_cpu_rev(ti_manuf_desc)); 1070 kfree(ti_manuf_desc); 1071 return -EINVAL; 1072 } 1073 1074 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 1075 if (!rom_desc) { 1076 kfree(ti_manuf_desc); 1077 return -ENOMEM; 1078 } 1079 1080 /* Search for type 2 record (firmware record) */ 1081 start_address = get_descriptor_addr(serial, 1082 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc); 1083 if (start_address != 0) { 1084 struct ti_i2c_firmware_rec *firmware_version; 1085 u8 *record; 1086 1087 dev_dbg(dev, "%s - Found Type FIRMWARE (Type 2) record\n", __func__); 1088 1089 firmware_version = kmalloc(sizeof(*firmware_version), 1090 GFP_KERNEL); 1091 if (!firmware_version) { 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 = (fw_hdr->major_version << 8) + 1116 (fw_hdr->minor_version); 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 fw_hdr->major_version, fw_hdr->minor_version); 1122 1123 /* Check if we have an old version in the I2C and 1124 update if necessary */ 1125 if (download_cur_ver < download_new_ver) { 1126 dev_dbg(dev, "%s - Update I2C dld from %d.%d to %d.%d\n", 1127 __func__, 1128 firmware_version->Ver_Major, 1129 firmware_version->Ver_Minor, 1130 fw_hdr->major_version, 1131 fw_hdr->minor_version); 1132 1133 record = kmalloc(1, GFP_KERNEL); 1134 if (!record) { 1135 kfree(firmware_version); 1136 kfree(rom_desc); 1137 kfree(ti_manuf_desc); 1138 return -ENOMEM; 1139 } 1140 /* In order to update the I2C firmware we must 1141 * change the type 2 record to type 0xF2. This 1142 * will force the UMP to come up in Boot Mode. 1143 * Then while in boot mode, the driver will 1144 * download the latest firmware (padded to 1145 * 15.5k) into the UMP ram. Finally when the 1146 * device comes back up in download mode the 1147 * driver will cause the new firmware to be 1148 * copied from the UMP Ram to I2C and the 1149 * firmware will update the record type from 1150 * 0xf2 to 0x02. 1151 */ 1152 *record = I2C_DESC_TYPE_FIRMWARE_BLANK; 1153 1154 /* Change the I2C Firmware record type to 1155 0xf2 to trigger an update */ 1156 status = write_rom(serial, start_address, 1157 sizeof(*record), record); 1158 if (status) { 1159 kfree(record); 1160 kfree(firmware_version); 1161 kfree(rom_desc); 1162 kfree(ti_manuf_desc); 1163 return status; 1164 } 1165 1166 /* verify the write -- must do this in order 1167 * for write to complete before we do the 1168 * hardware reset 1169 */ 1170 status = read_rom(serial, 1171 start_address, 1172 sizeof(*record), 1173 record); 1174 if (status) { 1175 kfree(record); 1176 kfree(firmware_version); 1177 kfree(rom_desc); 1178 kfree(ti_manuf_desc); 1179 return status; 1180 } 1181 1182 if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) { 1183 dev_err(dev, "%s - error resetting device\n", __func__); 1184 kfree(record); 1185 kfree(firmware_version); 1186 kfree(rom_desc); 1187 kfree(ti_manuf_desc); 1188 return -ENODEV; 1189 } 1190 1191 dev_dbg(dev, "%s - HARDWARE RESET\n", __func__); 1192 1193 /* Reset UMP -- Back to BOOT MODE */ 1194 status = ti_vsend_sync(serial->serial->dev, 1195 UMPC_HARDWARE_RESET, 1196 0, 0, NULL, 0, 1197 TI_VSEND_TIMEOUT_DEFAULT); 1198 1199 dev_dbg(dev, "%s - HARDWARE RESET return %d\n", __func__, status); 1200 1201 /* return an error on purpose. */ 1202 kfree(record); 1203 kfree(firmware_version); 1204 kfree(rom_desc); 1205 kfree(ti_manuf_desc); 1206 return -ENODEV; 1207 } else { 1208 /* Same or newer fw version is already loaded */ 1209 serial->fw_version = download_cur_ver; 1210 } 1211 kfree(firmware_version); 1212 } 1213 /* Search for type 0xF2 record (firmware blank record) */ 1214 else if ((start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) { 1215 #define HEADER_SIZE (sizeof(struct ti_i2c_desc) + \ 1216 sizeof(struct ti_i2c_firmware_rec)) 1217 __u8 *header; 1218 __u8 *vheader; 1219 1220 header = kmalloc(HEADER_SIZE, GFP_KERNEL); 1221 if (!header) { 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 kfree(header); 1230 kfree(rom_desc); 1231 kfree(ti_manuf_desc); 1232 return -ENOMEM; 1233 } 1234 1235 dev_dbg(dev, "%s - Found Type BLANK FIRMWARE (Type F2) record\n", __func__); 1236 1237 /* 1238 * In order to update the I2C firmware we must change 1239 * the type 2 record to type 0xF2. This will force the 1240 * UMP to come up in Boot Mode. Then while in boot 1241 * mode, the driver will download the latest firmware 1242 * (padded to 15.5k) into the UMP ram. Finally when the 1243 * device comes back up in download mode the driver 1244 * will cause the new firmware to be copied from the 1245 * UMP Ram to I2C and the firmware will update the 1246 * record type from 0xf2 to 0x02. 1247 */ 1248 status = build_i2c_fw_hdr(header, dev, fw); 1249 if (status) { 1250 kfree(vheader); 1251 kfree(header); 1252 kfree(rom_desc); 1253 kfree(ti_manuf_desc); 1254 return -EINVAL; 1255 } 1256 1257 /* Update I2C with type 0xf2 record with correct 1258 size and checksum */ 1259 status = write_rom(serial, 1260 start_address, 1261 HEADER_SIZE, 1262 header); 1263 if (status) { 1264 kfree(vheader); 1265 kfree(header); 1266 kfree(rom_desc); 1267 kfree(ti_manuf_desc); 1268 return -EINVAL; 1269 } 1270 1271 /* verify the write -- must do this in order for 1272 write to complete before we do the hardware reset */ 1273 status = read_rom(serial, start_address, 1274 HEADER_SIZE, vheader); 1275 1276 if (status) { 1277 dev_dbg(dev, "%s - can't read header back\n", __func__); 1278 kfree(vheader); 1279 kfree(header); 1280 kfree(rom_desc); 1281 kfree(ti_manuf_desc); 1282 return status; 1283 } 1284 if (memcmp(vheader, header, HEADER_SIZE)) { 1285 dev_dbg(dev, "%s - write download record failed\n", __func__); 1286 kfree(vheader); 1287 kfree(header); 1288 kfree(rom_desc); 1289 kfree(ti_manuf_desc); 1290 return -EINVAL; 1291 } 1292 1293 kfree(vheader); 1294 kfree(header); 1295 1296 dev_dbg(dev, "%s - Start firmware update\n", __func__); 1297 1298 /* Tell firmware to copy download image into I2C */ 1299 status = ti_vsend_sync(serial->serial->dev, 1300 UMPC_COPY_DNLD_TO_I2C, 1301 0, 0, NULL, 0, 1302 TI_VSEND_TIMEOUT_FW_DOWNLOAD); 1303 1304 dev_dbg(dev, "%s - Update complete 0x%x\n", __func__, status); 1305 if (status) { 1306 dev_err(dev, 1307 "%s - UMPC_COPY_DNLD_TO_I2C failed\n", 1308 __func__); 1309 kfree(rom_desc); 1310 kfree(ti_manuf_desc); 1311 return status; 1312 } 1313 } 1314 1315 // The device is running the download code 1316 kfree(rom_desc); 1317 kfree(ti_manuf_desc); 1318 return 0; 1319 } 1320 1321 /********************************************************************/ 1322 /* Boot Mode */ 1323 /********************************************************************/ 1324 dev_dbg(dev, "%s - RUNNING IN BOOT MODE\n", __func__); 1325 1326 /* Configure the TI device so we can use the BULK pipes for download */ 1327 status = config_boot_dev(serial->serial->dev); 1328 if (status) 1329 return status; 1330 1331 if (le16_to_cpu(serial->serial->dev->descriptor.idVendor) 1332 != USB_VENDOR_ID_ION) { 1333 dev_dbg(dev, "%s - VID = 0x%x\n", __func__, 1334 le16_to_cpu(serial->serial->dev->descriptor.idVendor)); 1335 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II; 1336 goto stayinbootmode; 1337 } 1338 1339 /* We have an ION device (I2c Must be programmed) 1340 Determine I2C image type */ 1341 if (i2c_type_bootmode(serial)) 1342 goto stayinbootmode; 1343 1344 /* Check for ION Vendor ID and that the I2C is valid */ 1345 if (!check_i2c_image(serial)) { 1346 struct ti_i2c_image_header *header; 1347 int i; 1348 __u8 cs = 0; 1349 __u8 *buffer; 1350 int buffer_size; 1351 1352 /* Validate Hardware version number 1353 * Read Manufacturing Descriptor from TI Based Edgeport 1354 */ 1355 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL); 1356 if (!ti_manuf_desc) 1357 return -ENOMEM; 1358 1359 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc); 1360 if (status) { 1361 kfree(ti_manuf_desc); 1362 goto stayinbootmode; 1363 } 1364 1365 /* Check for version 2 */ 1366 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) { 1367 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n", 1368 __func__, ti_cpu_rev(ti_manuf_desc)); 1369 kfree(ti_manuf_desc); 1370 goto stayinbootmode; 1371 } 1372 1373 kfree(ti_manuf_desc); 1374 1375 /* 1376 * In order to update the I2C firmware we must change the type 1377 * 2 record to type 0xF2. This will force the UMP to come up 1378 * in Boot Mode. Then while in boot mode, the driver will 1379 * download the latest firmware (padded to 15.5k) into the 1380 * UMP ram. Finally when the device comes back up in download 1381 * mode the driver will cause the new firmware to be copied 1382 * from the UMP Ram to I2C and the firmware will update the 1383 * record type from 0xf2 to 0x02. 1384 * 1385 * Do we really have to copy the whole firmware image, 1386 * or could we do this in place! 1387 */ 1388 1389 /* Allocate a 15.5k buffer + 3 byte header */ 1390 buffer_size = (((1024 * 16) - 512) + 1391 sizeof(struct ti_i2c_image_header)); 1392 buffer = kmalloc(buffer_size, GFP_KERNEL); 1393 if (!buffer) 1394 return -ENOMEM; 1395 1396 /* Initialize the buffer to 0xff (pad the buffer) */ 1397 memset(buffer, 0xff, buffer_size); 1398 memcpy(buffer, &fw->data[4], fw->size - 4); 1399 1400 for (i = sizeof(struct ti_i2c_image_header); 1401 i < buffer_size; i++) { 1402 cs = (__u8)(cs + buffer[i]); 1403 } 1404 1405 header = (struct ti_i2c_image_header *)buffer; 1406 1407 /* update length and checksum after padding */ 1408 header->Length = cpu_to_le16((__u16)(buffer_size - 1409 sizeof(struct ti_i2c_image_header))); 1410 header->CheckSum = cs; 1411 1412 /* Download the operational code */ 1413 dev_dbg(dev, "%s - Downloading operational code image version %d.%d (TI UMP)\n", 1414 __func__, 1415 fw_hdr->major_version, fw_hdr->minor_version); 1416 status = download_code(serial, buffer, buffer_size); 1417 1418 kfree(buffer); 1419 1420 if (status) { 1421 dev_dbg(dev, "%s - Error downloading operational code image\n", __func__); 1422 return status; 1423 } 1424 1425 /* Device will reboot */ 1426 serial->product_info.TiMode = TI_MODE_TRANSITIONING; 1427 1428 dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__); 1429 1430 /* return an error on purpose */ 1431 return -ENODEV; 1432 } 1433 1434 stayinbootmode: 1435 /* Eprom is invalid or blank stay in boot mode */ 1436 dev_dbg(dev, "%s - STAYING IN BOOT MODE\n", __func__); 1437 serial->product_info.TiMode = TI_MODE_BOOT; 1438 1439 return 0; 1440 } 1441 1442 1443 static int ti_do_config(struct edgeport_port *port, int feature, int on) 1444 { 1445 int port_number = port->port->port_number; 1446 1447 on = !!on; /* 1 or 0 not bitmask */ 1448 return send_cmd(port->port->serial->dev, 1449 feature, (__u8)(UMPM_UART1_PORT + port_number), 1450 on, NULL, 0); 1451 } 1452 1453 1454 static int restore_mcr(struct edgeport_port *port, __u8 mcr) 1455 { 1456 int status = 0; 1457 1458 dev_dbg(&port->port->dev, "%s - %x\n", __func__, mcr); 1459 1460 status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR); 1461 if (status) 1462 return status; 1463 status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS); 1464 if (status) 1465 return status; 1466 return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK); 1467 } 1468 1469 /* Convert TI LSR to standard UART flags */ 1470 static __u8 map_line_status(__u8 ti_lsr) 1471 { 1472 __u8 lsr = 0; 1473 1474 #define MAP_FLAG(flagUmp, flagUart) \ 1475 if (ti_lsr & flagUmp) \ 1476 lsr |= flagUart; 1477 1478 MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR) /* overrun */ 1479 MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR) /* parity error */ 1480 MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR) /* framing error */ 1481 MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK) /* break detected */ 1482 MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL) /* rx data available */ 1483 MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY) /* tx hold reg empty */ 1484 1485 #undef MAP_FLAG 1486 1487 return lsr; 1488 } 1489 1490 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr) 1491 { 1492 struct async_icount *icount; 1493 struct tty_struct *tty; 1494 1495 dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, msr); 1496 1497 if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | 1498 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) { 1499 icount = &edge_port->port->icount; 1500 1501 /* update input line counters */ 1502 if (msr & EDGEPORT_MSR_DELTA_CTS) 1503 icount->cts++; 1504 if (msr & EDGEPORT_MSR_DELTA_DSR) 1505 icount->dsr++; 1506 if (msr & EDGEPORT_MSR_DELTA_CD) 1507 icount->dcd++; 1508 if (msr & EDGEPORT_MSR_DELTA_RI) 1509 icount->rng++; 1510 wake_up_interruptible(&edge_port->port->port.delta_msr_wait); 1511 } 1512 1513 /* Save the new modem status */ 1514 edge_port->shadow_msr = msr & 0xf0; 1515 1516 tty = tty_port_tty_get(&edge_port->port->port); 1517 /* handle CTS flow control */ 1518 if (tty && C_CRTSCTS(tty)) { 1519 if (msr & EDGEPORT_MSR_CTS) 1520 tty_wakeup(tty); 1521 } 1522 tty_kref_put(tty); 1523 } 1524 1525 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data, 1526 __u8 lsr, __u8 data) 1527 { 1528 struct async_icount *icount; 1529 __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | 1530 LSR_FRM_ERR | LSR_BREAK)); 1531 1532 dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr); 1533 1534 edge_port->shadow_lsr = lsr; 1535 1536 if (new_lsr & LSR_BREAK) 1537 /* 1538 * Parity and Framing errors only count if they 1539 * occur exclusive of a break being received. 1540 */ 1541 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK); 1542 1543 /* Place LSR data byte into Rx buffer */ 1544 if (lsr_data) 1545 edge_tty_recv(edge_port->port, &data, 1); 1546 1547 /* update input line counters */ 1548 icount = &edge_port->port->icount; 1549 if (new_lsr & LSR_BREAK) 1550 icount->brk++; 1551 if (new_lsr & LSR_OVER_ERR) 1552 icount->overrun++; 1553 if (new_lsr & LSR_PAR_ERR) 1554 icount->parity++; 1555 if (new_lsr & LSR_FRM_ERR) 1556 icount->frame++; 1557 } 1558 1559 1560 static void edge_interrupt_callback(struct urb *urb) 1561 { 1562 struct edgeport_serial *edge_serial = urb->context; 1563 struct usb_serial_port *port; 1564 struct edgeport_port *edge_port; 1565 struct device *dev; 1566 unsigned char *data = urb->transfer_buffer; 1567 int length = urb->actual_length; 1568 int port_number; 1569 int function; 1570 int retval; 1571 __u8 lsr; 1572 __u8 msr; 1573 int status = urb->status; 1574 1575 switch (status) { 1576 case 0: 1577 /* success */ 1578 break; 1579 case -ECONNRESET: 1580 case -ENOENT: 1581 case -ESHUTDOWN: 1582 /* this urb is terminated, clean up */ 1583 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 1584 __func__, status); 1585 return; 1586 default: 1587 dev_err(&urb->dev->dev, "%s - nonzero urb status received: " 1588 "%d\n", __func__, status); 1589 goto exit; 1590 } 1591 1592 if (!length) { 1593 dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__); 1594 goto exit; 1595 } 1596 1597 dev = &edge_serial->serial->dev->dev; 1598 usb_serial_debug_data(dev, __func__, length, data); 1599 1600 if (length != 2) { 1601 dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length); 1602 goto exit; 1603 } 1604 1605 port_number = TIUMP_GET_PORT_FROM_CODE(data[0]); 1606 function = TIUMP_GET_FUNC_FROM_CODE(data[0]); 1607 dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__, 1608 port_number, function, data[1]); 1609 port = edge_serial->serial->port[port_number]; 1610 edge_port = usb_get_serial_port_data(port); 1611 if (!edge_port) { 1612 dev_dbg(dev, "%s - edge_port not found\n", __func__); 1613 return; 1614 } 1615 switch (function) { 1616 case TIUMP_INTERRUPT_CODE_LSR: 1617 lsr = map_line_status(data[1]); 1618 if (lsr & UMP_UART_LSR_DATA_MASK) { 1619 /* Save the LSR event for bulk read 1620 completion routine */ 1621 dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n", 1622 __func__, port_number, lsr); 1623 edge_port->lsr_event = 1; 1624 edge_port->lsr_mask = lsr; 1625 } else { 1626 dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n", 1627 __func__, port_number, lsr); 1628 handle_new_lsr(edge_port, 0, lsr, 0); 1629 } 1630 break; 1631 1632 case TIUMP_INTERRUPT_CODE_MSR: /* MSR */ 1633 /* Copy MSR from UMP */ 1634 msr = data[1]; 1635 dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n", 1636 __func__, port_number, msr); 1637 handle_new_msr(edge_port, msr); 1638 break; 1639 1640 default: 1641 dev_err(&urb->dev->dev, 1642 "%s - Unknown Interrupt code from UMP %x\n", 1643 __func__, data[1]); 1644 break; 1645 1646 } 1647 1648 exit: 1649 retval = usb_submit_urb(urb, GFP_ATOMIC); 1650 if (retval) 1651 dev_err(&urb->dev->dev, 1652 "%s - usb_submit_urb failed with result %d\n", 1653 __func__, retval); 1654 } 1655 1656 static void edge_bulk_in_callback(struct urb *urb) 1657 { 1658 struct edgeport_port *edge_port = urb->context; 1659 struct device *dev = &edge_port->port->dev; 1660 unsigned char *data = urb->transfer_buffer; 1661 int retval = 0; 1662 int port_number; 1663 int status = urb->status; 1664 1665 switch (status) { 1666 case 0: 1667 /* success */ 1668 break; 1669 case -ECONNRESET: 1670 case -ENOENT: 1671 case -ESHUTDOWN: 1672 /* this urb is terminated, clean up */ 1673 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status); 1674 return; 1675 default: 1676 dev_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status); 1677 } 1678 1679 if (status == -EPIPE) 1680 goto exit; 1681 1682 if (status) { 1683 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__); 1684 return; 1685 } 1686 1687 port_number = edge_port->port->port_number; 1688 1689 if (edge_port->lsr_event) { 1690 edge_port->lsr_event = 0; 1691 dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n", 1692 __func__, port_number, edge_port->lsr_mask, *data); 1693 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data); 1694 /* Adjust buffer length/pointer */ 1695 --urb->actual_length; 1696 ++data; 1697 } 1698 1699 if (urb->actual_length) { 1700 usb_serial_debug_data(dev, __func__, urb->actual_length, data); 1701 if (edge_port->close_pending) 1702 dev_dbg(dev, "%s - close pending, dropping data on the floor\n", 1703 __func__); 1704 else 1705 edge_tty_recv(edge_port->port, data, 1706 urb->actual_length); 1707 edge_port->port->icount.rx += urb->actual_length; 1708 } 1709 1710 exit: 1711 /* continue read unless stopped */ 1712 spin_lock(&edge_port->ep_lock); 1713 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) 1714 retval = usb_submit_urb(urb, GFP_ATOMIC); 1715 else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) 1716 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED; 1717 1718 spin_unlock(&edge_port->ep_lock); 1719 if (retval) 1720 dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval); 1721 } 1722 1723 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data, 1724 int length) 1725 { 1726 int queued; 1727 1728 queued = tty_insert_flip_string(&port->port, data, length); 1729 if (queued < length) 1730 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n", 1731 __func__, length - queued); 1732 tty_flip_buffer_push(&port->port); 1733 } 1734 1735 static void edge_bulk_out_callback(struct urb *urb) 1736 { 1737 struct usb_serial_port *port = urb->context; 1738 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1739 int status = urb->status; 1740 struct tty_struct *tty; 1741 1742 edge_port->ep_write_urb_in_use = 0; 1743 1744 switch (status) { 1745 case 0: 1746 /* success */ 1747 break; 1748 case -ECONNRESET: 1749 case -ENOENT: 1750 case -ESHUTDOWN: 1751 /* this urb is terminated, clean up */ 1752 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", 1753 __func__, status); 1754 return; 1755 default: 1756 dev_err_console(port, "%s - nonzero write bulk status " 1757 "received: %d\n", __func__, status); 1758 } 1759 1760 /* send any buffered data */ 1761 tty = tty_port_tty_get(&port->port); 1762 edge_send(port, tty); 1763 tty_kref_put(tty); 1764 } 1765 1766 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port) 1767 { 1768 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1769 struct edgeport_serial *edge_serial; 1770 struct usb_device *dev; 1771 struct urb *urb; 1772 int port_number; 1773 int status; 1774 u16 open_settings; 1775 u8 transaction_timeout; 1776 1777 if (edge_port == NULL) 1778 return -ENODEV; 1779 1780 port_number = port->port_number; 1781 1782 dev = port->serial->dev; 1783 1784 /* turn off loopback */ 1785 status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0); 1786 if (status) { 1787 dev_err(&port->dev, 1788 "%s - cannot send clear loopback command, %d\n", 1789 __func__, status); 1790 return status; 1791 } 1792 1793 /* set up the port settings */ 1794 if (tty) 1795 edge_set_termios(tty, port, &tty->termios); 1796 1797 /* open up the port */ 1798 1799 /* milliseconds to timeout for DMA transfer */ 1800 transaction_timeout = 2; 1801 1802 edge_port->ump_read_timeout = 1803 max(20, ((transaction_timeout * 3) / 2)); 1804 1805 /* milliseconds to timeout for DMA transfer */ 1806 open_settings = (u8)(UMP_DMA_MODE_CONTINOUS | 1807 UMP_PIPE_TRANS_TIMEOUT_ENA | 1808 (transaction_timeout << 2)); 1809 1810 dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__); 1811 1812 /* Tell TI to open and start the port */ 1813 status = send_cmd(dev, UMPC_OPEN_PORT, 1814 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0); 1815 if (status) { 1816 dev_err(&port->dev, "%s - cannot send open command, %d\n", 1817 __func__, status); 1818 return status; 1819 } 1820 1821 /* Start the DMA? */ 1822 status = send_cmd(dev, UMPC_START_PORT, 1823 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0); 1824 if (status) { 1825 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n", 1826 __func__, status); 1827 return status; 1828 } 1829 1830 /* Clear TX and RX buffers in UMP */ 1831 status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN); 1832 if (status) { 1833 dev_err(&port->dev, 1834 "%s - cannot send clear buffers command, %d\n", 1835 __func__, status); 1836 return status; 1837 } 1838 1839 /* Read Initial MSR */ 1840 status = ti_vread_sync(dev, UMPC_READ_MSR, 0, 1841 (__u16)(UMPM_UART1_PORT + port_number), 1842 &edge_port->shadow_msr, 1); 1843 if (status) { 1844 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n", 1845 __func__, status); 1846 return status; 1847 } 1848 1849 dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr); 1850 1851 /* Set Initial MCR */ 1852 edge_port->shadow_mcr = MCR_RTS | MCR_DTR; 1853 dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr); 1854 1855 edge_serial = edge_port->edge_serial; 1856 if (mutex_lock_interruptible(&edge_serial->es_lock)) 1857 return -ERESTARTSYS; 1858 if (edge_serial->num_ports_open == 0) { 1859 /* we are the first port to open, post the interrupt urb */ 1860 urb = edge_serial->serial->port[0]->interrupt_in_urb; 1861 if (!urb) { 1862 dev_err(&port->dev, 1863 "%s - no interrupt urb present, exiting\n", 1864 __func__); 1865 status = -EINVAL; 1866 goto release_es_lock; 1867 } 1868 urb->context = edge_serial; 1869 status = usb_submit_urb(urb, GFP_KERNEL); 1870 if (status) { 1871 dev_err(&port->dev, 1872 "%s - usb_submit_urb failed with value %d\n", 1873 __func__, status); 1874 goto release_es_lock; 1875 } 1876 } 1877 1878 /* 1879 * reset the data toggle on the bulk endpoints to work around bug in 1880 * host controllers where things get out of sync some times 1881 */ 1882 usb_clear_halt(dev, port->write_urb->pipe); 1883 usb_clear_halt(dev, port->read_urb->pipe); 1884 1885 /* start up our bulk read urb */ 1886 urb = port->read_urb; 1887 if (!urb) { 1888 dev_err(&port->dev, "%s - no read urb present, exiting\n", 1889 __func__); 1890 status = -EINVAL; 1891 goto unlink_int_urb; 1892 } 1893 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING; 1894 urb->context = edge_port; 1895 status = usb_submit_urb(urb, GFP_KERNEL); 1896 if (status) { 1897 dev_err(&port->dev, 1898 "%s - read bulk usb_submit_urb failed with value %d\n", 1899 __func__, status); 1900 goto unlink_int_urb; 1901 } 1902 1903 ++edge_serial->num_ports_open; 1904 1905 goto release_es_lock; 1906 1907 unlink_int_urb: 1908 if (edge_port->edge_serial->num_ports_open == 0) 1909 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 1910 release_es_lock: 1911 mutex_unlock(&edge_serial->es_lock); 1912 return status; 1913 } 1914 1915 static void edge_close(struct usb_serial_port *port) 1916 { 1917 struct edgeport_serial *edge_serial; 1918 struct edgeport_port *edge_port; 1919 struct usb_serial *serial = port->serial; 1920 unsigned long flags; 1921 int port_number; 1922 1923 edge_serial = usb_get_serial_data(port->serial); 1924 edge_port = usb_get_serial_port_data(port); 1925 if (edge_serial == NULL || edge_port == NULL) 1926 return; 1927 1928 /* The bulkreadcompletion routine will check 1929 * this flag and dump add read data */ 1930 edge_port->close_pending = 1; 1931 1932 usb_kill_urb(port->read_urb); 1933 usb_kill_urb(port->write_urb); 1934 edge_port->ep_write_urb_in_use = 0; 1935 spin_lock_irqsave(&edge_port->ep_lock, flags); 1936 kfifo_reset_out(&port->write_fifo); 1937 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1938 1939 dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__); 1940 port_number = port->port_number; 1941 send_cmd(serial->dev, UMPC_CLOSE_PORT, 1942 (__u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0); 1943 1944 mutex_lock(&edge_serial->es_lock); 1945 --edge_port->edge_serial->num_ports_open; 1946 if (edge_port->edge_serial->num_ports_open <= 0) { 1947 /* last port is now closed, let's shut down our interrupt urb */ 1948 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 1949 edge_port->edge_serial->num_ports_open = 0; 1950 } 1951 mutex_unlock(&edge_serial->es_lock); 1952 edge_port->close_pending = 0; 1953 } 1954 1955 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port, 1956 const unsigned char *data, int count) 1957 { 1958 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1959 1960 if (count == 0) { 1961 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__); 1962 return 0; 1963 } 1964 1965 if (edge_port == NULL) 1966 return -ENODEV; 1967 if (edge_port->close_pending == 1) 1968 return -ENODEV; 1969 1970 count = kfifo_in_locked(&port->write_fifo, data, count, 1971 &edge_port->ep_lock); 1972 edge_send(port, tty); 1973 1974 return count; 1975 } 1976 1977 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty) 1978 { 1979 int count, result; 1980 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 1981 unsigned long flags; 1982 1983 spin_lock_irqsave(&edge_port->ep_lock, flags); 1984 1985 if (edge_port->ep_write_urb_in_use) { 1986 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1987 return; 1988 } 1989 1990 count = kfifo_out(&port->write_fifo, 1991 port->write_urb->transfer_buffer, 1992 port->bulk_out_size); 1993 1994 if (count == 0) { 1995 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 1996 return; 1997 } 1998 1999 edge_port->ep_write_urb_in_use = 1; 2000 2001 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2002 2003 usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer); 2004 2005 /* set up our urb */ 2006 port->write_urb->transfer_buffer_length = count; 2007 2008 /* send the data out the bulk port */ 2009 result = usb_submit_urb(port->write_urb, GFP_ATOMIC); 2010 if (result) { 2011 dev_err_console(port, 2012 "%s - failed submitting write urb, error %d\n", 2013 __func__, result); 2014 edge_port->ep_write_urb_in_use = 0; 2015 /* TODO: reschedule edge_send */ 2016 } else 2017 edge_port->port->icount.tx += count; 2018 2019 /* wakeup any process waiting for writes to complete */ 2020 /* there is now more room in the buffer for new writes */ 2021 if (tty) 2022 tty_wakeup(tty); 2023 } 2024 2025 static int edge_write_room(struct tty_struct *tty) 2026 { 2027 struct usb_serial_port *port = tty->driver_data; 2028 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2029 int room = 0; 2030 unsigned long flags; 2031 2032 if (edge_port == NULL) 2033 return 0; 2034 if (edge_port->close_pending == 1) 2035 return 0; 2036 2037 spin_lock_irqsave(&edge_port->ep_lock, flags); 2038 room = kfifo_avail(&port->write_fifo); 2039 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2040 2041 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); 2042 return room; 2043 } 2044 2045 static int edge_chars_in_buffer(struct tty_struct *tty) 2046 { 2047 struct usb_serial_port *port = tty->driver_data; 2048 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2049 int chars = 0; 2050 unsigned long flags; 2051 if (edge_port == NULL) 2052 return 0; 2053 2054 spin_lock_irqsave(&edge_port->ep_lock, flags); 2055 chars = kfifo_len(&port->write_fifo); 2056 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2057 2058 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); 2059 return chars; 2060 } 2061 2062 static bool edge_tx_empty(struct usb_serial_port *port) 2063 { 2064 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2065 int ret; 2066 2067 ret = tx_active(edge_port); 2068 if (ret > 0) 2069 return false; 2070 2071 return true; 2072 } 2073 2074 static void edge_throttle(struct tty_struct *tty) 2075 { 2076 struct usb_serial_port *port = tty->driver_data; 2077 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2078 int status; 2079 2080 if (edge_port == NULL) 2081 return; 2082 2083 /* if we are implementing XON/XOFF, send the stop character */ 2084 if (I_IXOFF(tty)) { 2085 unsigned char stop_char = STOP_CHAR(tty); 2086 status = edge_write(tty, port, &stop_char, 1); 2087 if (status <= 0) { 2088 dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status); 2089 } 2090 } 2091 2092 /* if we are implementing RTS/CTS, stop reads */ 2093 /* and the Edgeport will clear the RTS line */ 2094 if (C_CRTSCTS(tty)) 2095 stop_read(edge_port); 2096 2097 } 2098 2099 static void edge_unthrottle(struct tty_struct *tty) 2100 { 2101 struct usb_serial_port *port = tty->driver_data; 2102 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2103 int status; 2104 2105 if (edge_port == NULL) 2106 return; 2107 2108 /* if we are implementing XON/XOFF, send the start character */ 2109 if (I_IXOFF(tty)) { 2110 unsigned char start_char = START_CHAR(tty); 2111 status = edge_write(tty, port, &start_char, 1); 2112 if (status <= 0) { 2113 dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status); 2114 } 2115 } 2116 /* if we are implementing RTS/CTS, restart reads */ 2117 /* are the Edgeport will assert the RTS line */ 2118 if (C_CRTSCTS(tty)) { 2119 status = restart_read(edge_port); 2120 if (status) 2121 dev_err(&port->dev, 2122 "%s - read bulk usb_submit_urb failed: %d\n", 2123 __func__, status); 2124 } 2125 2126 } 2127 2128 static void stop_read(struct edgeport_port *edge_port) 2129 { 2130 unsigned long flags; 2131 2132 spin_lock_irqsave(&edge_port->ep_lock, flags); 2133 2134 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) 2135 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING; 2136 edge_port->shadow_mcr &= ~MCR_RTS; 2137 2138 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2139 } 2140 2141 static int restart_read(struct edgeport_port *edge_port) 2142 { 2143 struct urb *urb; 2144 int status = 0; 2145 unsigned long flags; 2146 2147 spin_lock_irqsave(&edge_port->ep_lock, flags); 2148 2149 if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) { 2150 urb = edge_port->port->read_urb; 2151 status = usb_submit_urb(urb, GFP_ATOMIC); 2152 } 2153 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING; 2154 edge_port->shadow_mcr |= MCR_RTS; 2155 2156 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2157 2158 return status; 2159 } 2160 2161 static void change_port_settings(struct tty_struct *tty, 2162 struct edgeport_port *edge_port, struct ktermios *old_termios) 2163 { 2164 struct device *dev = &edge_port->port->dev; 2165 struct ump_uart_config *config; 2166 int baud; 2167 unsigned cflag; 2168 int status; 2169 int port_number = edge_port->port->port_number; 2170 2171 config = kmalloc (sizeof (*config), GFP_KERNEL); 2172 if (!config) { 2173 tty->termios = *old_termios; 2174 return; 2175 } 2176 2177 cflag = tty->termios.c_cflag; 2178 2179 config->wFlags = 0; 2180 2181 /* These flags must be set */ 2182 config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT; 2183 config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR; 2184 config->bUartMode = (__u8)(edge_port->bUartMode); 2185 2186 switch (cflag & CSIZE) { 2187 case CS5: 2188 config->bDataBits = UMP_UART_CHAR5BITS; 2189 dev_dbg(dev, "%s - data bits = 5\n", __func__); 2190 break; 2191 case CS6: 2192 config->bDataBits = UMP_UART_CHAR6BITS; 2193 dev_dbg(dev, "%s - data bits = 6\n", __func__); 2194 break; 2195 case CS7: 2196 config->bDataBits = UMP_UART_CHAR7BITS; 2197 dev_dbg(dev, "%s - data bits = 7\n", __func__); 2198 break; 2199 default: 2200 case CS8: 2201 config->bDataBits = UMP_UART_CHAR8BITS; 2202 dev_dbg(dev, "%s - data bits = 8\n", __func__); 2203 break; 2204 } 2205 2206 if (cflag & PARENB) { 2207 if (cflag & PARODD) { 2208 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY; 2209 config->bParity = UMP_UART_ODDPARITY; 2210 dev_dbg(dev, "%s - parity = odd\n", __func__); 2211 } else { 2212 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY; 2213 config->bParity = UMP_UART_EVENPARITY; 2214 dev_dbg(dev, "%s - parity = even\n", __func__); 2215 } 2216 } else { 2217 config->bParity = UMP_UART_NOPARITY; 2218 dev_dbg(dev, "%s - parity = none\n", __func__); 2219 } 2220 2221 if (cflag & CSTOPB) { 2222 config->bStopBits = UMP_UART_STOPBIT2; 2223 dev_dbg(dev, "%s - stop bits = 2\n", __func__); 2224 } else { 2225 config->bStopBits = UMP_UART_STOPBIT1; 2226 dev_dbg(dev, "%s - stop bits = 1\n", __func__); 2227 } 2228 2229 /* figure out the flow control settings */ 2230 if (cflag & CRTSCTS) { 2231 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW; 2232 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW; 2233 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__); 2234 } else { 2235 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__); 2236 restart_read(edge_port); 2237 } 2238 2239 /* if we are implementing XON/XOFF, set the start and stop 2240 character in the device */ 2241 config->cXon = START_CHAR(tty); 2242 config->cXoff = STOP_CHAR(tty); 2243 2244 /* if we are implementing INBOUND XON/XOFF */ 2245 if (I_IXOFF(tty)) { 2246 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X; 2247 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", 2248 __func__, config->cXon, config->cXoff); 2249 } else 2250 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__); 2251 2252 /* if we are implementing OUTBOUND XON/XOFF */ 2253 if (I_IXON(tty)) { 2254 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X; 2255 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n", 2256 __func__, config->cXon, config->cXoff); 2257 } else 2258 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__); 2259 2260 tty->termios.c_cflag &= ~CMSPAR; 2261 2262 /* Round the baud rate */ 2263 baud = tty_get_baud_rate(tty); 2264 if (!baud) { 2265 /* pick a default, any default... */ 2266 baud = 9600; 2267 } else 2268 tty_encode_baud_rate(tty, baud, baud); 2269 2270 edge_port->baud_rate = baud; 2271 config->wBaudRate = (__u16)((461550L + baud/2) / baud); 2272 2273 /* FIXME: Recompute actual baud from divisor here */ 2274 2275 dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate); 2276 2277 dev_dbg(dev, "wBaudRate: %d\n", (int)(461550L / config->wBaudRate)); 2278 dev_dbg(dev, "wFlags: 0x%x\n", config->wFlags); 2279 dev_dbg(dev, "bDataBits: %d\n", config->bDataBits); 2280 dev_dbg(dev, "bParity: %d\n", config->bParity); 2281 dev_dbg(dev, "bStopBits: %d\n", config->bStopBits); 2282 dev_dbg(dev, "cXon: %d\n", config->cXon); 2283 dev_dbg(dev, "cXoff: %d\n", config->cXoff); 2284 dev_dbg(dev, "bUartMode: %d\n", config->bUartMode); 2285 2286 /* move the word values into big endian mode */ 2287 cpu_to_be16s(&config->wFlags); 2288 cpu_to_be16s(&config->wBaudRate); 2289 2290 status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG, 2291 (__u8)(UMPM_UART1_PORT + port_number), 2292 0, (__u8 *)config, sizeof(*config)); 2293 if (status) 2294 dev_dbg(dev, "%s - error %d when trying to write config to device\n", 2295 __func__, status); 2296 kfree(config); 2297 } 2298 2299 static void edge_set_termios(struct tty_struct *tty, 2300 struct usb_serial_port *port, struct ktermios *old_termios) 2301 { 2302 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2303 unsigned int cflag; 2304 2305 cflag = tty->termios.c_cflag; 2306 2307 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, 2308 tty->termios.c_cflag, tty->termios.c_iflag); 2309 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, 2310 old_termios->c_cflag, old_termios->c_iflag); 2311 2312 if (edge_port == NULL) 2313 return; 2314 /* change the port settings to the new ones specified */ 2315 change_port_settings(tty, edge_port, old_termios); 2316 } 2317 2318 static int edge_tiocmset(struct tty_struct *tty, 2319 unsigned int set, unsigned int clear) 2320 { 2321 struct usb_serial_port *port = tty->driver_data; 2322 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2323 unsigned int mcr; 2324 unsigned long flags; 2325 2326 spin_lock_irqsave(&edge_port->ep_lock, flags); 2327 mcr = edge_port->shadow_mcr; 2328 if (set & TIOCM_RTS) 2329 mcr |= MCR_RTS; 2330 if (set & TIOCM_DTR) 2331 mcr |= MCR_DTR; 2332 if (set & TIOCM_LOOP) 2333 mcr |= MCR_LOOPBACK; 2334 2335 if (clear & TIOCM_RTS) 2336 mcr &= ~MCR_RTS; 2337 if (clear & TIOCM_DTR) 2338 mcr &= ~MCR_DTR; 2339 if (clear & TIOCM_LOOP) 2340 mcr &= ~MCR_LOOPBACK; 2341 2342 edge_port->shadow_mcr = mcr; 2343 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2344 2345 restore_mcr(edge_port, mcr); 2346 return 0; 2347 } 2348 2349 static int edge_tiocmget(struct tty_struct *tty) 2350 { 2351 struct usb_serial_port *port = tty->driver_data; 2352 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2353 unsigned int result = 0; 2354 unsigned int msr; 2355 unsigned int mcr; 2356 unsigned long flags; 2357 2358 spin_lock_irqsave(&edge_port->ep_lock, flags); 2359 2360 msr = edge_port->shadow_msr; 2361 mcr = edge_port->shadow_mcr; 2362 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */ 2363 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */ 2364 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */ 2365 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */ 2366 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */ 2367 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */ 2368 2369 2370 dev_dbg(&port->dev, "%s -- %x\n", __func__, result); 2371 spin_unlock_irqrestore(&edge_port->ep_lock, flags); 2372 2373 return result; 2374 } 2375 2376 static int get_serial_info(struct edgeport_port *edge_port, 2377 struct serial_struct __user *retinfo) 2378 { 2379 struct serial_struct tmp; 2380 unsigned cwait; 2381 2382 if (!retinfo) 2383 return -EFAULT; 2384 2385 cwait = edge_port->port->port.closing_wait; 2386 if (cwait != ASYNC_CLOSING_WAIT_NONE) 2387 cwait = jiffies_to_msecs(cwait) / 10; 2388 2389 memset(&tmp, 0, sizeof(tmp)); 2390 2391 tmp.type = PORT_16550A; 2392 tmp.line = edge_port->port->minor; 2393 tmp.port = edge_port->port->port_number; 2394 tmp.irq = 0; 2395 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; 2396 tmp.xmit_fifo_size = edge_port->port->bulk_out_size; 2397 tmp.baud_base = 9600; 2398 tmp.close_delay = 5*HZ; 2399 tmp.closing_wait = cwait; 2400 2401 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) 2402 return -EFAULT; 2403 return 0; 2404 } 2405 2406 static int edge_ioctl(struct tty_struct *tty, 2407 unsigned int cmd, unsigned long arg) 2408 { 2409 struct usb_serial_port *port = tty->driver_data; 2410 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2411 2412 switch (cmd) { 2413 case TIOCGSERIAL: 2414 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__); 2415 return get_serial_info(edge_port, 2416 (struct serial_struct __user *) arg); 2417 } 2418 return -ENOIOCTLCMD; 2419 } 2420 2421 static void edge_break(struct tty_struct *tty, int break_state) 2422 { 2423 struct usb_serial_port *port = tty->driver_data; 2424 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2425 int status; 2426 int bv = 0; /* Off */ 2427 2428 if (break_state == -1) 2429 bv = 1; /* On */ 2430 status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv); 2431 if (status) 2432 dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n", 2433 __func__, status); 2434 } 2435 2436 static void edge_heartbeat_schedule(struct edgeport_serial *edge_serial) 2437 { 2438 if (!edge_serial->use_heartbeat) 2439 return; 2440 2441 schedule_delayed_work(&edge_serial->heartbeat_work, 2442 FW_HEARTBEAT_SECS * HZ); 2443 } 2444 2445 static void edge_heartbeat_work(struct work_struct *work) 2446 { 2447 struct edgeport_serial *serial; 2448 struct ti_i2c_desc *rom_desc; 2449 2450 serial = container_of(work, struct edgeport_serial, 2451 heartbeat_work.work); 2452 2453 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL); 2454 2455 /* Descriptor address request is enough to reset the firmware timer */ 2456 if (!rom_desc || !get_descriptor_addr(serial, I2C_DESC_TYPE_ION, 2457 rom_desc)) { 2458 dev_err(&serial->serial->interface->dev, 2459 "%s - Incomplete heartbeat\n", __func__); 2460 } 2461 kfree(rom_desc); 2462 2463 edge_heartbeat_schedule(serial); 2464 } 2465 2466 static int edge_startup(struct usb_serial *serial) 2467 { 2468 struct edgeport_serial *edge_serial; 2469 int status; 2470 const struct firmware *fw; 2471 const char *fw_name = "edgeport/down3.bin"; 2472 struct device *dev = &serial->interface->dev; 2473 u16 product_id; 2474 2475 /* create our private serial structure */ 2476 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL); 2477 if (!edge_serial) 2478 return -ENOMEM; 2479 2480 mutex_init(&edge_serial->es_lock); 2481 edge_serial->serial = serial; 2482 usb_set_serial_data(serial, edge_serial); 2483 2484 status = request_firmware(&fw, fw_name, dev); 2485 if (status) { 2486 dev_err(dev, "Failed to load image \"%s\" err %d\n", 2487 fw_name, status); 2488 kfree(edge_serial); 2489 return status; 2490 } 2491 2492 status = download_fw(edge_serial, fw); 2493 release_firmware(fw); 2494 if (status) { 2495 kfree(edge_serial); 2496 return status; 2497 } 2498 2499 product_id = le16_to_cpu( 2500 edge_serial->serial->dev->descriptor.idProduct); 2501 2502 /* Currently only the EP/416 models require heartbeat support */ 2503 if (edge_serial->fw_version > FW_HEARTBEAT_VERSION_CUTOFF) { 2504 if (product_id == ION_DEVICE_ID_TI_EDGEPORT_416 || 2505 product_id == ION_DEVICE_ID_TI_EDGEPORT_416B) { 2506 edge_serial->use_heartbeat = true; 2507 } 2508 } 2509 2510 INIT_DELAYED_WORK(&edge_serial->heartbeat_work, edge_heartbeat_work); 2511 edge_heartbeat_schedule(edge_serial); 2512 2513 return 0; 2514 } 2515 2516 static void edge_disconnect(struct usb_serial *serial) 2517 { 2518 } 2519 2520 static void edge_release(struct usb_serial *serial) 2521 { 2522 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 2523 2524 cancel_delayed_work_sync(&edge_serial->heartbeat_work); 2525 kfree(edge_serial); 2526 } 2527 2528 static int edge_port_probe(struct usb_serial_port *port) 2529 { 2530 struct edgeport_port *edge_port; 2531 int ret; 2532 2533 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL); 2534 if (!edge_port) 2535 return -ENOMEM; 2536 2537 spin_lock_init(&edge_port->ep_lock); 2538 edge_port->port = port; 2539 edge_port->edge_serial = usb_get_serial_data(port->serial); 2540 edge_port->bUartMode = default_uart_mode; 2541 2542 switch (port->port_number) { 2543 case 0: 2544 edge_port->uart_base = UMPMEM_BASE_UART1; 2545 edge_port->dma_address = UMPD_OEDB1_ADDRESS; 2546 break; 2547 case 1: 2548 edge_port->uart_base = UMPMEM_BASE_UART2; 2549 edge_port->dma_address = UMPD_OEDB2_ADDRESS; 2550 break; 2551 default: 2552 dev_err(&port->dev, "unknown port number\n"); 2553 ret = -ENODEV; 2554 goto err; 2555 } 2556 2557 dev_dbg(&port->dev, 2558 "%s - port_number = %d, uart_base = %04x, dma_address = %04x\n", 2559 __func__, port->port_number, edge_port->uart_base, 2560 edge_port->dma_address); 2561 2562 usb_set_serial_port_data(port, edge_port); 2563 2564 ret = edge_create_sysfs_attrs(port); 2565 if (ret) 2566 goto err; 2567 2568 port->port.closing_wait = msecs_to_jiffies(closing_wait * 10); 2569 port->port.drain_delay = 1; 2570 2571 return 0; 2572 err: 2573 kfree(edge_port); 2574 2575 return ret; 2576 } 2577 2578 static int edge_port_remove(struct usb_serial_port *port) 2579 { 2580 struct edgeport_port *edge_port; 2581 2582 edge_port = usb_get_serial_port_data(port); 2583 edge_remove_sysfs_attrs(port); 2584 kfree(edge_port); 2585 2586 return 0; 2587 } 2588 2589 /* Sysfs Attributes */ 2590 2591 static ssize_t uart_mode_show(struct device *dev, 2592 struct device_attribute *attr, char *buf) 2593 { 2594 struct usb_serial_port *port = to_usb_serial_port(dev); 2595 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2596 2597 return sprintf(buf, "%d\n", edge_port->bUartMode); 2598 } 2599 2600 static ssize_t uart_mode_store(struct device *dev, 2601 struct device_attribute *attr, const char *valbuf, size_t count) 2602 { 2603 struct usb_serial_port *port = to_usb_serial_port(dev); 2604 struct edgeport_port *edge_port = usb_get_serial_port_data(port); 2605 unsigned int v = simple_strtoul(valbuf, NULL, 0); 2606 2607 dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v); 2608 2609 if (v < 256) 2610 edge_port->bUartMode = v; 2611 else 2612 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v); 2613 2614 return count; 2615 } 2616 static DEVICE_ATTR_RW(uart_mode); 2617 2618 static int edge_create_sysfs_attrs(struct usb_serial_port *port) 2619 { 2620 return device_create_file(&port->dev, &dev_attr_uart_mode); 2621 } 2622 2623 static int edge_remove_sysfs_attrs(struct usb_serial_port *port) 2624 { 2625 device_remove_file(&port->dev, &dev_attr_uart_mode); 2626 return 0; 2627 } 2628 2629 #ifdef CONFIG_PM 2630 static int edge_suspend(struct usb_serial *serial, pm_message_t message) 2631 { 2632 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 2633 2634 cancel_delayed_work_sync(&edge_serial->heartbeat_work); 2635 2636 return 0; 2637 } 2638 2639 static int edge_resume(struct usb_serial *serial) 2640 { 2641 struct edgeport_serial *edge_serial = usb_get_serial_data(serial); 2642 2643 edge_heartbeat_schedule(edge_serial); 2644 2645 return 0; 2646 } 2647 #endif 2648 2649 static struct usb_serial_driver edgeport_1port_device = { 2650 .driver = { 2651 .owner = THIS_MODULE, 2652 .name = "edgeport_ti_1", 2653 }, 2654 .description = "Edgeport TI 1 port adapter", 2655 .id_table = edgeport_1port_id_table, 2656 .num_ports = 1, 2657 .open = edge_open, 2658 .close = edge_close, 2659 .throttle = edge_throttle, 2660 .unthrottle = edge_unthrottle, 2661 .attach = edge_startup, 2662 .disconnect = edge_disconnect, 2663 .release = edge_release, 2664 .port_probe = edge_port_probe, 2665 .port_remove = edge_port_remove, 2666 .ioctl = edge_ioctl, 2667 .set_termios = edge_set_termios, 2668 .tiocmget = edge_tiocmget, 2669 .tiocmset = edge_tiocmset, 2670 .tiocmiwait = usb_serial_generic_tiocmiwait, 2671 .get_icount = usb_serial_generic_get_icount, 2672 .write = edge_write, 2673 .write_room = edge_write_room, 2674 .chars_in_buffer = edge_chars_in_buffer, 2675 .tx_empty = edge_tx_empty, 2676 .break_ctl = edge_break, 2677 .read_int_callback = edge_interrupt_callback, 2678 .read_bulk_callback = edge_bulk_in_callback, 2679 .write_bulk_callback = edge_bulk_out_callback, 2680 #ifdef CONFIG_PM 2681 .suspend = edge_suspend, 2682 .resume = edge_resume, 2683 #endif 2684 }; 2685 2686 static struct usb_serial_driver edgeport_2port_device = { 2687 .driver = { 2688 .owner = THIS_MODULE, 2689 .name = "edgeport_ti_2", 2690 }, 2691 .description = "Edgeport TI 2 port adapter", 2692 .id_table = edgeport_2port_id_table, 2693 .num_ports = 2, 2694 .open = edge_open, 2695 .close = edge_close, 2696 .throttle = edge_throttle, 2697 .unthrottle = edge_unthrottle, 2698 .attach = edge_startup, 2699 .disconnect = edge_disconnect, 2700 .release = edge_release, 2701 .port_probe = edge_port_probe, 2702 .port_remove = edge_port_remove, 2703 .ioctl = edge_ioctl, 2704 .set_termios = edge_set_termios, 2705 .tiocmget = edge_tiocmget, 2706 .tiocmset = edge_tiocmset, 2707 .tiocmiwait = usb_serial_generic_tiocmiwait, 2708 .get_icount = usb_serial_generic_get_icount, 2709 .write = edge_write, 2710 .write_room = edge_write_room, 2711 .chars_in_buffer = edge_chars_in_buffer, 2712 .tx_empty = edge_tx_empty, 2713 .break_ctl = edge_break, 2714 .read_int_callback = edge_interrupt_callback, 2715 .read_bulk_callback = edge_bulk_in_callback, 2716 .write_bulk_callback = edge_bulk_out_callback, 2717 #ifdef CONFIG_PM 2718 .suspend = edge_suspend, 2719 .resume = edge_resume, 2720 #endif 2721 }; 2722 2723 static struct usb_serial_driver * const serial_drivers[] = { 2724 &edgeport_1port_device, &edgeport_2port_device, NULL 2725 }; 2726 2727 module_usb_serial_driver(serial_drivers, id_table_combined); 2728 2729 MODULE_AUTHOR(DRIVER_AUTHOR); 2730 MODULE_DESCRIPTION(DRIVER_DESC); 2731 MODULE_LICENSE("GPL"); 2732 MODULE_FIRMWARE("edgeport/down3.bin"); 2733 2734 module_param(closing_wait, int, S_IRUGO | S_IWUSR); 2735 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs"); 2736 2737 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR); 2738 MODULE_PARM_DESC(ignore_cpu_rev, 2739 "Ignore the cpu revision when connecting to a device"); 2740 2741 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR); 2742 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ..."); 2743