1/*
   2 * USB FTDI client driver for Elan Digital Systems's Uxxx adapters
   3 *
   4 * Copyright(C) 2006 Elan Digital Systems Limited
   5 * http://www.elandigitalsystems.com
   6 *
   7 * Author and Maintainer - Tony Olech - Elan Digital Systems
   8 * tony.olech@elandigitalsystems.com
   9 *
  10 * This program is free software;you can redistribute it and/or
  11 * modify it under the terms of the GNU General Public License as
  12 * published by the Free Software Foundation, version 2.
  13 *
  14 *
  15 * This driver was written by Tony Olech(tony.olech@elandigitalsystems.com)
  16 * based on various USB client drivers in the 2.6.15 linux kernel
  17 * with constant reference to the 3rd Edition of Linux Device Drivers
  18 * published by O'Reilly
  19 *
  20 * The U132 adapter is a USB to CardBus adapter specifically designed
  21 * for PC cards that contain an OHCI host controller. Typical PC cards
  22 * are the Orange Mobile 3G Option GlobeTrotter Fusion card.
  23 *
  24 * The U132 adapter will *NOT *work with PC cards that do not contain
  25 * an OHCI controller. A simple way to test whether a PC card has an
  26 * OHCI controller as an interface is to insert the PC card directly
  27 * into a laptop(or desktop) with a CardBus slot and if "lspci" shows
  28 * a new USB controller and "lsusb -v" shows a new OHCI Host Controller
  29 * then there is a good chance that the U132 adapter will support the
  30 * PC card.(you also need the specific client driver for the PC card)
  31 *
  32 * Please inform the Author and Maintainer about any PC cards that
  33 * contain OHCI Host Controller and work when directly connected to
  34 * an embedded CardBus slot but do not work when they are connected
  35 * via an ELAN U132 adapter.
  36 *
  37 */
  38
  39#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  40
  41#include <linux/kernel.h>
  42#include <linux/errno.h>
  43#include <linux/init.h>
  44#include <linux/list.h>
  45#include <linux/ioctl.h>
  46#include <linux/pci_ids.h>
  47#include <linux/slab.h>
  48#include <linux/module.h>
  49#include <linux/kref.h>
  50#include <linux/mutex.h>
  51#include <asm/uaccess.h>
  52#include <linux/usb.h>
  53#include <linux/workqueue.h>
  54#include <linux/platform_device.h>
  55MODULE_AUTHOR("Tony Olech");
  56MODULE_DESCRIPTION("FTDI ELAN driver");
  57MODULE_LICENSE("GPL");
  58#define INT_MODULE_PARM(n, v) static int n = v;module_param(n, int, 0444)
  59static bool distrust_firmware = 1;
  60module_param(distrust_firmware, bool, 0);
  61MODULE_PARM_DESC(distrust_firmware,
  62		 "true to distrust firmware power/overcurrent setup");
  63extern struct platform_driver u132_platform_driver;
  64static struct workqueue_struct *status_queue;
  65static struct workqueue_struct *command_queue;
  66static struct workqueue_struct *respond_queue;
  67/*
  68 * ftdi_module_lock exists to protect access to global variables
  69 *
  70 */
  71static struct mutex ftdi_module_lock;
  72static int ftdi_instances = 0;
  73static struct list_head ftdi_static_list;
  74/*
  75 * end of the global variables protected by ftdi_module_lock
  76 */
  77#include "usb_u132.h"
  78#include <asm/io.h>
  79#include <linux/usb/hcd.h>
  80
  81/* FIXME ohci.h is ONLY for internal use by the OHCI driver.
  82 * If you're going to try stuff like this, you need to split
  83 * out shareable stuff (register declarations?) into its own
  84 * file, maybe name <linux/usb/ohci.h>
  85 */
  86
  87#include "../host/ohci.h"
  88/* Define these values to match your devices*/
  89#define USB_FTDI_ELAN_VENDOR_ID 0x0403
  90#define USB_FTDI_ELAN_PRODUCT_ID 0xd6ea
  91/* table of devices that work with this driver*/
  92static const struct usb_device_id ftdi_elan_table[] = {
  93	{USB_DEVICE(USB_FTDI_ELAN_VENDOR_ID, USB_FTDI_ELAN_PRODUCT_ID)},
  94	{ /* Terminating entry */ }
  95};
  96
  97MODULE_DEVICE_TABLE(usb, ftdi_elan_table);
  98/* only the jtag(firmware upgrade device) interface requires
  99 * a device file and corresponding minor number, but the
 100 * interface is created unconditionally - I suppose it could
 101 * be configured or not according to a module parameter.
 102 * But since we(now) require one interface per device,
 103 * and since it unlikely that a normal installation would
 104 * require more than a couple of elan-ftdi devices, 8 seems
 105 * like a reasonable limit to have here, and if someone
 106 * really requires more than 8 devices, then they can frig the
 107 * code and recompile
 108 */
 109#define USB_FTDI_ELAN_MINOR_BASE 192
 110#define COMMAND_BITS 5
 111#define COMMAND_SIZE (1<<COMMAND_BITS)
 112#define COMMAND_MASK (COMMAND_SIZE-1)
 113struct u132_command {
 114	u8 header;
 115	u16 length;
 116	u8 address;
 117	u8 width;
 118	u32 value;
 119	int follows;
 120	void *buffer;
 121};
 122#define RESPOND_BITS 5
 123#define RESPOND_SIZE (1<<RESPOND_BITS)
 124#define RESPOND_MASK (RESPOND_SIZE-1)
 125struct u132_respond {
 126	u8 header;
 127	u8 address;
 128	u32 *value;
 129	int *result;
 130	struct completion wait_completion;
 131};
 132struct u132_target {
 133	void *endp;
 134	struct urb *urb;
 135	int toggle_bits;
 136	int error_count;
 137	int condition_code;
 138	int repeat_number;
 139	int halted;
 140	int skipped;
 141	int actual;
 142	int non_null;
 143	int active;
 144	int abandoning;
 145	void (*callback)(void *endp, struct urb *urb, u8 *buf, int len,
 146			 int toggle_bits, int error_count, int condition_code,
 147			 int repeat_number, int halted, int skipped, int actual,
 148			 int non_null);
 149};
 150/* Structure to hold all of our device specific stuff*/
 151struct usb_ftdi {
 152	struct list_head ftdi_list;
 153	struct mutex u132_lock;
 154	int command_next;
 155	int command_head;
 156	struct u132_command command[COMMAND_SIZE];
 157	int respond_next;
 158	int respond_head;
 159	struct u132_respond respond[RESPOND_SIZE];
 160	struct u132_target target[4];
 161	char device_name[16];
 162	unsigned synchronized:1;
 163	unsigned enumerated:1;
 164	unsigned registered:1;
 165	unsigned initialized:1;
 166	unsigned card_ejected:1;
 167	int function;
 168	int sequence_num;
 169	int disconnected;
 170	int gone_away;
 171	int stuck_status;
 172	int status_queue_delay;
 173	struct semaphore sw_lock;
 174	struct usb_device *udev;
 175	struct usb_interface *interface;
 176	struct usb_class_driver *class;
 177	struct delayed_work status_work;
 178	struct delayed_work command_work;
 179	struct delayed_work respond_work;
 180	struct u132_platform_data platform_data;
 181	struct resource resources[0];
 182	struct platform_device platform_dev;
 183	unsigned char *bulk_in_buffer;
 184	size_t bulk_in_size;
 185	size_t bulk_in_last;
 186	size_t bulk_in_left;
 187	__u8 bulk_in_endpointAddr;
 188	__u8 bulk_out_endpointAddr;
 189	struct kref kref;
 190	u32 controlreg;
 191	u8 response[4 + 1024];
 192	int expected;
 193	int received;
 194	int ed_found;
 195};
 196#define kref_to_usb_ftdi(d) container_of(d, struct usb_ftdi, kref)
 197#define platform_device_to_usb_ftdi(d) container_of(d, struct usb_ftdi, \
 198						    platform_dev)
 199static struct usb_driver ftdi_elan_driver;
 200static void ftdi_elan_delete(struct kref *kref)
 201{
 202	struct usb_ftdi *ftdi = kref_to_usb_ftdi(kref);
 203	dev_warn(&ftdi->udev->dev, "FREEING ftdi=%p\n", ftdi);
 204	usb_put_dev(ftdi->udev);
 205	ftdi->disconnected += 1;
 206	mutex_lock(&ftdi_module_lock);
 207	list_del_init(&ftdi->ftdi_list);
 208	ftdi_instances -= 1;
 209	mutex_unlock(&ftdi_module_lock);
 210	kfree(ftdi->bulk_in_buffer);
 211	ftdi->bulk_in_buffer = NULL;
 212}
 213
 214static void ftdi_elan_put_kref(struct usb_ftdi *ftdi)
 215{
 216	kref_put(&ftdi->kref, ftdi_elan_delete);
 217}
 218
 219static void ftdi_elan_get_kref(struct usb_ftdi *ftdi)
 220{
 221	kref_get(&ftdi->kref);
 222}
 223
 224static void ftdi_elan_init_kref(struct usb_ftdi *ftdi)
 225{
 226	kref_init(&ftdi->kref);
 227}
 228
 229static void ftdi_status_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
 230{
 231	if (!queue_delayed_work(status_queue, &ftdi->status_work, delta))
 232		kref_put(&ftdi->kref, ftdi_elan_delete);
 233}
 234
 235static void ftdi_status_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 236{
 237	if (queue_delayed_work(status_queue, &ftdi->status_work, delta))
 238		kref_get(&ftdi->kref);
 239}
 240
 241static void ftdi_status_cancel_work(struct usb_ftdi *ftdi)
 242{
 243	if (cancel_delayed_work(&ftdi->status_work))
 244		kref_put(&ftdi->kref, ftdi_elan_delete);
 245}
 246
 247static void ftdi_command_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
 248{
 249	if (!queue_delayed_work(command_queue, &ftdi->command_work, delta))
 250		kref_put(&ftdi->kref, ftdi_elan_delete);
 251}
 252
 253static void ftdi_command_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 254{
 255	if (queue_delayed_work(command_queue, &ftdi->command_work, delta))
 256		kref_get(&ftdi->kref);
 257}
 258
 259static void ftdi_command_cancel_work(struct usb_ftdi *ftdi)
 260{
 261	if (cancel_delayed_work(&ftdi->command_work))
 262		kref_put(&ftdi->kref, ftdi_elan_delete);
 263}
 264
 265static void ftdi_response_requeue_work(struct usb_ftdi *ftdi,
 266				       unsigned int delta)
 267{
 268	if (!queue_delayed_work(respond_queue, &ftdi->respond_work, delta))
 269		kref_put(&ftdi->kref, ftdi_elan_delete);
 270}
 271
 272static void ftdi_respond_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 273{
 274	if (queue_delayed_work(respond_queue, &ftdi->respond_work, delta))
 275		kref_get(&ftdi->kref);
 276}
 277
 278static void ftdi_response_cancel_work(struct usb_ftdi *ftdi)
 279{
 280	if (cancel_delayed_work(&ftdi->respond_work))
 281		kref_put(&ftdi->kref, ftdi_elan_delete);
 282}
 283
 284void ftdi_elan_gone_away(struct platform_device *pdev)
 285{
 286	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
 287	ftdi->gone_away += 1;
 288	ftdi_elan_put_kref(ftdi);
 289}
 290
 291
 292EXPORT_SYMBOL_GPL(ftdi_elan_gone_away);
 293static void ftdi_release_platform_dev(struct device *dev)
 294{
 295	dev->parent = NULL;
 296}
 297
 298static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
 299				  struct u132_target *target, u8 *buffer, int length);
 300static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi);
 301static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi);
 302static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi);
 303static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi);
 304static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi);
 305static int ftdi_elan_synchronize(struct usb_ftdi *ftdi);
 306static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi);
 307static int ftdi_elan_command_engine(struct usb_ftdi *ftdi);
 308static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi);
 309static int ftdi_elan_hcd_init(struct usb_ftdi *ftdi)
 310{
 311	int result;
 312	if (ftdi->platform_dev.dev.parent)
 313		return -EBUSY;
 314	ftdi_elan_get_kref(ftdi);
 315	ftdi->platform_data.potpg = 100;
 316	ftdi->platform_data.reset = NULL;
 317	ftdi->platform_dev.id = ftdi->sequence_num;
 318	ftdi->platform_dev.resource = ftdi->resources;
 319	ftdi->platform_dev.num_resources = ARRAY_SIZE(ftdi->resources);
 320	ftdi->platform_dev.dev.platform_data = &ftdi->platform_data;
 321	ftdi->platform_dev.dev.parent = NULL;
 322	ftdi->platform_dev.dev.release = ftdi_release_platform_dev;
 323	ftdi->platform_dev.dev.dma_mask = NULL;
 324	snprintf(ftdi->device_name, sizeof(ftdi->device_name), "u132_hcd");
 325	ftdi->platform_dev.name = ftdi->device_name;
 326	dev_info(&ftdi->udev->dev, "requesting module '%s'\n", "u132_hcd");
 327	request_module("u132_hcd");
 328	dev_info(&ftdi->udev->dev, "registering '%s'\n",
 329		 ftdi->platform_dev.name);
 330	result = platform_device_register(&ftdi->platform_dev);
 331	return result;
 332}
 333
 334static void ftdi_elan_abandon_completions(struct usb_ftdi *ftdi)
 335{
 336	mutex_lock(&ftdi->u132_lock);
 337	while (ftdi->respond_next > ftdi->respond_head) {
 338		struct u132_respond *respond = &ftdi->respond[RESPOND_MASK &
 339							      ftdi->respond_head++];
 340		*respond->result = -ESHUTDOWN;
 341		*respond->value = 0;
 342		complete(&respond->wait_completion);
 343	} mutex_unlock(&ftdi->u132_lock);
 344}
 345
 346static void ftdi_elan_abandon_targets(struct usb_ftdi *ftdi)
 347{
 348	int ed_number = 4;
 349	mutex_lock(&ftdi->u132_lock);
 350	while (ed_number-- > 0) {
 351		struct u132_target *target = &ftdi->target[ed_number];
 352		if (target->active == 1) {
 353			target->condition_code = TD_DEVNOTRESP;
 354			mutex_unlock(&ftdi->u132_lock);
 355			ftdi_elan_do_callback(ftdi, target, NULL, 0);
 356			mutex_lock(&ftdi->u132_lock);
 357		}
 358	}
 359	ftdi->received = 0;
 360	ftdi->expected = 4;
 361	ftdi->ed_found = 0;
 362	mutex_unlock(&ftdi->u132_lock);
 363}
 364
 365static void ftdi_elan_flush_targets(struct usb_ftdi *ftdi)
 366{
 367	int ed_number = 4;
 368	mutex_lock(&ftdi->u132_lock);
 369	while (ed_number-- > 0) {
 370		struct u132_target *target = &ftdi->target[ed_number];
 371		target->abandoning = 1;
 372	wait_1:if (target->active == 1) {
 373			int command_size = ftdi->command_next -
 374				ftdi->command_head;
 375			if (command_size < COMMAND_SIZE) {
 376				struct u132_command *command = &ftdi->command[
 377					COMMAND_MASK & ftdi->command_next];
 378				command->header = 0x80 | (ed_number << 5) | 0x4;
 379				command->length = 0x00;
 380				command->address = 0x00;
 381				command->width = 0x00;
 382				command->follows = 0;
 383				command->value = 0;
 384				command->buffer = &command->value;
 385				ftdi->command_next += 1;
 386				ftdi_elan_kick_command_queue(ftdi);
 387			} else {
 388				mutex_unlock(&ftdi->u132_lock);
 389				msleep(100);
 390				mutex_lock(&ftdi->u132_lock);
 391				goto wait_1;
 392			}
 393		}
 394	wait_2:if (target->active == 1) {
 395			int command_size = ftdi->command_next -
 396				ftdi->command_head;
 397			if (command_size < COMMAND_SIZE) {
 398				struct u132_command *command = &ftdi->command[
 399					COMMAND_MASK & ftdi->command_next];
 400				command->header = 0x90 | (ed_number << 5);
 401				command->length = 0x00;
 402				command->address = 0x00;
 403				command->width = 0x00;
 404				command->follows = 0;
 405				command->value = 0;
 406				command->buffer = &command->value;
 407				ftdi->command_next += 1;
 408				ftdi_elan_kick_command_queue(ftdi);
 409			} else {
 410				mutex_unlock(&ftdi->u132_lock);
 411				msleep(100);
 412				mutex_lock(&ftdi->u132_lock);
 413				goto wait_2;
 414			}
 415		}
 416	}
 417	ftdi->received = 0;
 418	ftdi->expected = 4;
 419	ftdi->ed_found = 0;
 420	mutex_unlock(&ftdi->u132_lock);
 421}
 422
 423static void ftdi_elan_cancel_targets(struct usb_ftdi *ftdi)
 424{
 425	int ed_number = 4;
 426	mutex_lock(&ftdi->u132_lock);
 427	while (ed_number-- > 0) {
 428		struct u132_target *target = &ftdi->target[ed_number];
 429		target->abandoning = 1;
 430	wait:if (target->active == 1) {
 431			int command_size = ftdi->command_next -
 432				ftdi->command_head;
 433			if (command_size < COMMAND_SIZE) {
 434				struct u132_command *command = &ftdi->command[
 435					COMMAND_MASK & ftdi->command_next];
 436				command->header = 0x80 | (ed_number << 5) | 0x4;
 437				command->length = 0x00;
 438				command->address = 0x00;
 439				command->width = 0x00;
 440				command->follows = 0;
 441				command->value = 0;
 442				command->buffer = &command->value;
 443				ftdi->command_next += 1;
 444				ftdi_elan_kick_command_queue(ftdi);
 445			} else {
 446				mutex_unlock(&ftdi->u132_lock);
 447				msleep(100);
 448				mutex_lock(&ftdi->u132_lock);
 449				goto wait;
 450			}
 451		}
 452	}
 453	ftdi->received = 0;
 454	ftdi->expected = 4;
 455	ftdi->ed_found = 0;
 456	mutex_unlock(&ftdi->u132_lock);
 457}
 458
 459static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi)
 460{
 461	ftdi_command_queue_work(ftdi, 0);
 462}
 463
 464static void ftdi_elan_command_work(struct work_struct *work)
 465{
 466	struct usb_ftdi *ftdi =
 467		container_of(work, struct usb_ftdi, command_work.work);
 468
 469	if (ftdi->disconnected > 0) {
 470		ftdi_elan_put_kref(ftdi);
 471		return;
 472	} else {
 473		int retval = ftdi_elan_command_engine(ftdi);
 474		if (retval == -ESHUTDOWN) {
 475			ftdi->disconnected += 1;
 476		} else if (retval == -ENODEV) {
 477			ftdi->disconnected += 1;
 478		} else if (retval)
 479			dev_err(&ftdi->udev->dev, "command error %d\n", retval);
 480		ftdi_command_requeue_work(ftdi, msecs_to_jiffies(10));
 481		return;
 482	}
 483}
 484
 485static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi)
 486{
 487	ftdi_respond_queue_work(ftdi, 0);
 488}
 489
 490static void ftdi_elan_respond_work(struct work_struct *work)
 491{
 492	struct usb_ftdi *ftdi =
 493		container_of(work, struct usb_ftdi, respond_work.work);
 494	if (ftdi->disconnected > 0) {
 495		ftdi_elan_put_kref(ftdi);
 496		return;
 497	} else {
 498		int retval = ftdi_elan_respond_engine(ftdi);
 499		if (retval == 0) {
 500		} else if (retval == -ESHUTDOWN) {
 501			ftdi->disconnected += 1;
 502		} else if (retval == -ENODEV) {
 503			ftdi->disconnected += 1;
 504		} else if (retval == -EILSEQ) {
 505			ftdi->disconnected += 1;
 506		} else {
 507			ftdi->disconnected += 1;
 508			dev_err(&ftdi->udev->dev, "respond error %d\n", retval);
 509		}
 510		if (ftdi->disconnected > 0) {
 511			ftdi_elan_abandon_completions(ftdi);
 512			ftdi_elan_abandon_targets(ftdi);
 513		}
 514		ftdi_response_requeue_work(ftdi, msecs_to_jiffies(10));
 515		return;
 516	}
 517}
 518
 519
 520/*
 521 * the sw_lock is initially held and will be freed
 522 * after the FTDI has been synchronized
 523 *
 524 */
 525static void ftdi_elan_status_work(struct work_struct *work)
 526{
 527	struct usb_ftdi *ftdi =
 528		container_of(work, struct usb_ftdi, status_work.work);
 529	int work_delay_in_msec = 0;
 530	if (ftdi->disconnected > 0) {
 531		ftdi_elan_put_kref(ftdi);
 532		return;
 533	} else if (ftdi->synchronized == 0) {
 534		down(&ftdi->sw_lock);
 535		if (ftdi_elan_synchronize(ftdi) == 0) {
 536			ftdi->synchronized = 1;
 537			ftdi_command_queue_work(ftdi, 1);
 538			ftdi_respond_queue_work(ftdi, 1);
 539			up(&ftdi->sw_lock);
 540			work_delay_in_msec = 100;
 541		} else {
 542			dev_err(&ftdi->udev->dev, "synchronize failed\n");
 543			up(&ftdi->sw_lock);
 544			work_delay_in_msec = 10 *1000;
 545		}
 546	} else if (ftdi->stuck_status > 0) {
 547		if (ftdi_elan_stuck_waiting(ftdi) == 0) {
 548			ftdi->stuck_status = 0;
 549			ftdi->synchronized = 0;
 550		} else if ((ftdi->stuck_status++ % 60) == 1) {
 551			dev_err(&ftdi->udev->dev, "WRONG type of card inserted - please remove\n");
 552		} else
 553			dev_err(&ftdi->udev->dev, "WRONG type of card inserted - checked %d times\n",
 554				ftdi->stuck_status);
 555		work_delay_in_msec = 100;
 556	} else if (ftdi->enumerated == 0) {
 557		if (ftdi_elan_enumeratePCI(ftdi) == 0) {
 558			ftdi->enumerated = 1;
 559			work_delay_in_msec = 250;
 560		} else
 561			work_delay_in_msec = 1000;
 562	} else if (ftdi->initialized == 0) {
 563		if (ftdi_elan_setupOHCI(ftdi) == 0) {
 564			ftdi->initialized = 1;
 565			work_delay_in_msec = 500;
 566		} else {
 567			dev_err(&ftdi->udev->dev, "initialized failed - trying again in 10 seconds\n");
 568			work_delay_in_msec = 1 *1000;
 569		}
 570	} else if (ftdi->registered == 0) {
 571		work_delay_in_msec = 10;
 572		if (ftdi_elan_hcd_init(ftdi) == 0) {
 573			ftdi->registered = 1;
 574		} else
 575			dev_err(&ftdi->udev->dev, "register failed\n");
 576		work_delay_in_msec = 250;
 577	} else {
 578		if (ftdi_elan_checkingPCI(ftdi) == 0) {
 579			work_delay_in_msec = 250;
 580		} else if (ftdi->controlreg & 0x00400000) {
 581			if (ftdi->gone_away > 0) {
 582				dev_err(&ftdi->udev->dev, "PCI device eject confirmed platform_dev.dev.parent=%p platform_dev.dev=%p\n",
 583					ftdi->platform_dev.dev.parent,
 584					&ftdi->platform_dev.dev);
 585				platform_device_unregister(&ftdi->platform_dev);
 586				ftdi->platform_dev.dev.parent = NULL;
 587				ftdi->registered = 0;
 588				ftdi->enumerated = 0;
 589				ftdi->card_ejected = 0;
 590				ftdi->initialized = 0;
 591				ftdi->gone_away = 0;
 592			} else
 593				ftdi_elan_flush_targets(ftdi);
 594			work_delay_in_msec = 250;
 595		} else {
 596			dev_err(&ftdi->udev->dev, "PCI device has disappeared\n");
 597			ftdi_elan_cancel_targets(ftdi);
 598			work_delay_in_msec = 500;
 599			ftdi->enumerated = 0;
 600			ftdi->initialized = 0;
 601		}
 602	}
 603	if (ftdi->disconnected > 0) {
 604		ftdi_elan_put_kref(ftdi);
 605		return;
 606	} else {
 607		ftdi_status_requeue_work(ftdi,
 608					 msecs_to_jiffies(work_delay_in_msec));
 609		return;
 610	}
 611}
 612
 613
 614/*
 615 * file_operations for the jtag interface
 616 *
 617 * the usage count for the device is incremented on open()
 618 * and decremented on release()
 619 */
 620static int ftdi_elan_open(struct inode *inode, struct file *file)
 621{
 622	int subminor;
 623	struct usb_interface *interface;
 624
 625	subminor = iminor(inode);
 626	interface = usb_find_interface(&ftdi_elan_driver, subminor);
 627
 628	if (!interface) {
 629		pr_err("can't find device for minor %d\n", subminor);
 630		return -ENODEV;
 631	} else {
 632		struct usb_ftdi *ftdi = usb_get_intfdata(interface);
 633		if (!ftdi) {
 634			return -ENODEV;
 635		} else {
 636			if (down_interruptible(&ftdi->sw_lock)) {
 637				return -EINTR;
 638			} else {
 639				ftdi_elan_get_kref(ftdi);
 640				file->private_data = ftdi;
 641				return 0;
 642			}
 643		}
 644	}
 645}
 646
 647static int ftdi_elan_release(struct inode *inode, struct file *file)
 648{
 649	struct usb_ftdi *ftdi = file->private_data;
 650	if (ftdi == NULL)
 651		return -ENODEV;
 652	up(&ftdi->sw_lock);        /* decrement the count on our device */
 653	ftdi_elan_put_kref(ftdi);
 654	return 0;
 655}
 656
 657
 658/*
 659 *
 660 * blocking bulk reads are used to get data from the device
 661 *
 662 */
 663static ssize_t ftdi_elan_read(struct file *file, char __user *buffer,
 664			      size_t count, loff_t *ppos)
 665{
 666	char data[30 *3 + 4];
 667	char *d = data;
 668	int m = (sizeof(data) - 1) / 3;
 669	int bytes_read = 0;
 670	int retry_on_empty = 10;
 671	int retry_on_timeout = 5;
 672	struct usb_ftdi *ftdi = file->private_data;
 673	if (ftdi->disconnected > 0) {
 674		return -ENODEV;
 675	}
 676	data[0] = 0;
 677have:if (ftdi->bulk_in_left > 0) {
 678		if (count-- > 0) {
 679			char *p = ++ftdi->bulk_in_last + ftdi->bulk_in_buffer;
 680			ftdi->bulk_in_left -= 1;
 681			if (bytes_read < m) {
 682				d += sprintf(d, " %02X", 0x000000FF & *p);
 683			} else if (bytes_read > m) {
 684			} else
 685				d += sprintf(d, " ..");
 686			if (copy_to_user(buffer++, p, 1)) {
 687				return -EFAULT;
 688			} else {
 689				bytes_read += 1;
 690				goto have;
 691			}
 692		} else
 693			return bytes_read;
 694	}
 695more:if (count > 0) {
 696		int packet_bytes = 0;
 697		int retval = usb_bulk_msg(ftdi->udev,
 698					  usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 699					  ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 700					  &packet_bytes, 50);
 701		if (packet_bytes > 2) {
 702			ftdi->bulk_in_left = packet_bytes - 2;
 703			ftdi->bulk_in_last = 1;
 704			goto have;
 705		} else if (retval == -ETIMEDOUT) {
 706			if (retry_on_timeout-- > 0) {
 707				goto more;
 708			} else if (bytes_read > 0) {
 709				return bytes_read;
 710			} else
 711				return retval;
 712		} else if (retval == 0) {
 713			if (retry_on_empty-- > 0) {
 714				goto more;
 715			} else
 716				return bytes_read;
 717		} else
 718			return retval;
 719	} else
 720		return bytes_read;
 721}
 722
 723static void ftdi_elan_write_bulk_callback(struct urb *urb)
 724{
 725	struct usb_ftdi *ftdi = urb->context;
 726	int status = urb->status;
 727
 728	if (status && !(status == -ENOENT || status == -ECONNRESET ||
 729			status == -ESHUTDOWN)) {
 730		dev_err(&ftdi->udev->dev,
 731			"urb=%p write bulk status received: %d\n", urb, status);
 732	}
 733	usb_free_coherent(urb->dev, urb->transfer_buffer_length,
 734			  urb->transfer_buffer, urb->transfer_dma);
 735}
 736
 737static int fill_buffer_with_all_queued_commands(struct usb_ftdi *ftdi,
 738						char *buf, int command_size, int total_size)
 739{
 740	int ed_commands = 0;
 741	int b = 0;
 742	int I = command_size;
 743	int i = ftdi->command_head;
 744	while (I-- > 0) {
 745		struct u132_command *command = &ftdi->command[COMMAND_MASK &
 746							      i++];
 747		int F = command->follows;
 748		u8 *f = command->buffer;
 749		if (command->header & 0x80) {
 750			ed_commands |= 1 << (0x3 & (command->header >> 5));
 751		}
 752		buf[b++] = command->header;
 753		buf[b++] = (command->length >> 0) & 0x00FF;
 754		buf[b++] = (command->length >> 8) & 0x00FF;
 755		buf[b++] = command->address;
 756		buf[b++] = command->width;
 757		while (F-- > 0) {
 758			buf[b++] = *f++;
 759		}
 760	}
 761	return ed_commands;
 762}
 763
 764static int ftdi_elan_total_command_size(struct usb_ftdi *ftdi, int command_size)
 765{
 766	int total_size = 0;
 767	int I = command_size;
 768	int i = ftdi->command_head;
 769	while (I-- > 0) {
 770		struct u132_command *command = &ftdi->command[COMMAND_MASK &
 771							      i++];
 772		total_size += 5 + command->follows;
 773	} return total_size;
 774}
 775
 776static int ftdi_elan_command_engine(struct usb_ftdi *ftdi)
 777{
 778	int retval;
 779	char *buf;
 780	int ed_commands;
 781	int total_size;
 782	struct urb *urb;
 783	int command_size = ftdi->command_next - ftdi->command_head;
 784	if (command_size == 0)
 785		return 0;
 786	total_size = ftdi_elan_total_command_size(ftdi, command_size);
 787	urb = usb_alloc_urb(0, GFP_KERNEL);
 788	if (!urb) {
 789		dev_err(&ftdi->udev->dev, "could not get a urb to write %d commands totaling %d bytes to the Uxxx\n",
 790			command_size, total_size);
 791		return -ENOMEM;
 792	}
 793	buf = usb_alloc_coherent(ftdi->udev, total_size, GFP_KERNEL,
 794				 &urb->transfer_dma);
 795	if (!buf) {
 796		dev_err(&ftdi->udev->dev, "could not get a buffer to write %d commands totaling %d bytes to the Uxxx\n",
 797			command_size, total_size);
 798		usb_free_urb(urb);
 799		return -ENOMEM;
 800	}
 801	ed_commands = fill_buffer_with_all_queued_commands(ftdi, buf,
 802							   command_size, total_size);
 803	usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
 804							   ftdi->bulk_out_endpointAddr), buf, total_size,
 805			  ftdi_elan_write_bulk_callback, ftdi);
 806	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 807	if (ed_commands) {
 808		char diag[40 *3 + 4];
 809		char *d = diag;
 810		int m = total_size;
 811		u8 *c = buf;
 812		int s = (sizeof(diag) - 1) / 3;
 813		diag[0] = 0;
 814		while (s-- > 0 && m-- > 0) {
 815			if (s > 0 || m == 0) {
 816				d += sprintf(d, " %02X", *c++);
 817			} else
 818				d += sprintf(d, " ..");
 819		}
 820	}
 821	retval = usb_submit_urb(urb, GFP_KERNEL);
 822	if (retval) {
 823		dev_err(&ftdi->udev->dev, "failed %d to submit urb %p to write %d commands totaling %d bytes to the Uxxx\n",
 824			retval, urb, command_size, total_size);
 825		usb_free_coherent(ftdi->udev, total_size, buf, urb->transfer_dma);
 826		usb_free_urb(urb);
 827		return retval;
 828	}
 829	usb_free_urb(urb);        /* release our reference to this urb,
 830				     the USB core will eventually free it entirely */
 831	ftdi->command_head += command_size;
 832	ftdi_elan_kick_respond_queue(ftdi);
 833	return 0;
 834}
 835
 836static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
 837				  struct u132_target *target, u8 *buffer, int length)
 838{
 839	struct urb *urb = target->urb;
 840	int halted = target->halted;
 841	int skipped = target->skipped;
 842	int actual = target->actual;
 843	int non_null = target->non_null;
 844	int toggle_bits = target->toggle_bits;
 845	int error_count = target->error_count;
 846	int condition_code = target->condition_code;
 847	int repeat_number = target->repeat_number;
 848	void (*callback) (void *, struct urb *, u8 *, int, int, int, int, int,
 849			  int, int, int, int) = target->callback;
 850	target->active -= 1;
 851	target->callback = NULL;
 852	(*callback) (target->endp, urb, buffer, length, toggle_bits,
 853		     error_count, condition_code, repeat_number, halted, skipped,
 854		     actual, non_null);
 855}
 856
 857static char *have_ed_set_response(struct usb_ftdi *ftdi,
 858				  struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 859				  char *b)
 860{
 861	int payload = (ed_length >> 0) & 0x07FF;
 862	mutex_lock(&ftdi->u132_lock);
 863	target->actual = 0;
 864	target->non_null = (ed_length >> 15) & 0x0001;
 865	target->repeat_number = (ed_length >> 11) & 0x000F;
 866	if (ed_type == 0x02) {
 867		if (payload == 0 || target->abandoning > 0) {
 868			target->abandoning = 0;
 869			mutex_unlock(&ftdi->u132_lock);
 870			ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 871					      payload);
 872			ftdi->received = 0;
 873			ftdi->expected = 4;
 874			ftdi->ed_found = 0;
 875			return ftdi->response;
 876		} else {
 877			ftdi->expected = 4 + payload;
 878			ftdi->ed_found = 1;
 879			mutex_unlock(&ftdi->u132_lock);
 880			return b;
 881		}
 882	} else if (ed_type == 0x03) {
 883		if (payload == 0 || target->abandoning > 0) {
 884			target->abandoning = 0;
 885			mutex_unlock(&ftdi->u132_lock);
 886			ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 887					      payload);
 888			ftdi->received = 0;
 889			ftdi->expected = 4;
 890			ftdi->ed_found = 0;
 891			return ftdi->response;
 892		} else {
 893			ftdi->expected = 4 + payload;
 894			ftdi->ed_found = 1;
 895			mutex_unlock(&ftdi->u132_lock);
 896			return b;
 897		}
 898	} else if (ed_type == 0x01) {
 899		target->abandoning = 0;
 900		mutex_unlock(&ftdi->u132_lock);
 901		ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 902				      payload);
 903		ftdi->received = 0;
 904		ftdi->expected = 4;
 905		ftdi->ed_found = 0;
 906		return ftdi->response;
 907	} else {
 908		target->abandoning = 0;
 909		mutex_unlock(&ftdi->u132_lock);
 910		ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 911				      payload);
 912		ftdi->received = 0;
 913		ftdi->expected = 4;
 914		ftdi->ed_found = 0;
 915		return ftdi->response;
 916	}
 917}
 918
 919static char *have_ed_get_response(struct usb_ftdi *ftdi,
 920				  struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 921				  char *b)
 922{
 923	mutex_lock(&ftdi->u132_lock);
 924	target->condition_code = TD_DEVNOTRESP;
 925	target->actual = (ed_length >> 0) & 0x01FF;
 926	target->non_null = (ed_length >> 15) & 0x0001;
 927	target->repeat_number = (ed_length >> 11) & 0x000F;
 928	mutex_unlock(&ftdi->u132_lock);
 929	if (target->active)
 930		ftdi_elan_do_callback(ftdi, target, NULL, 0);
 931	target->abandoning = 0;
 932	ftdi->received = 0;
 933	ftdi->expected = 4;
 934	ftdi->ed_found = 0;
 935	return ftdi->response;
 936}
 937
 938
 939/*
 940 * The engine tries to empty the FTDI fifo
 941 *
 942 * all responses found in the fifo data are dispatched thus
 943 * the response buffer can only ever hold a maximum sized
 944 * response from the Uxxx.
 945 *
 946 */
 947static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi)
 948{
 949	u8 *b = ftdi->response + ftdi->received;
 950	int bytes_read = 0;
 951	int retry_on_empty = 1;
 952	int retry_on_timeout = 3;
 953	int empty_packets = 0;
 954read:{
 955		int packet_bytes = 0;
 956		int retval = usb_bulk_msg(ftdi->udev,
 957					  usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 958					  ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 959					  &packet_bytes, 500);
 960		char diag[30 *3 + 4];
 961		char *d = diag;
 962		int m = packet_bytes;
 963		u8 *c = ftdi->bulk_in_buffer;
 964		int s = (sizeof(diag) - 1) / 3;
 965		diag[0] = 0;
 966		while (s-- > 0 && m-- > 0) {
 967			if (s > 0 || m == 0) {
 968				d += sprintf(d, " %02X", *c++);
 969			} else
 970				d += sprintf(d, " ..");
 971		}
 972		if (packet_bytes > 2) {
 973			ftdi->bulk_in_left = packet_bytes - 2;
 974			ftdi->bulk_in_last = 1;
 975			goto have;
 976		} else if (retval == -ETIMEDOUT) {
 977			if (retry_on_timeout-- > 0) {
 978				dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
 979					packet_bytes, bytes_read, diag);
 980				goto more;
 981			} else if (bytes_read > 0) {
 982				dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n",
 983					bytes_read, diag);
 984				return -ENOMEM;
 985			} else {
 986				dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
 987					packet_bytes, bytes_read, diag);
 988				return -ENOMEM;
 989			}
 990		} else if (retval == -EILSEQ) {
 991			dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
 992				retval, packet_bytes, bytes_read, diag);
 993			return retval;
 994		} else if (retval) {
 995			dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
 996				retval, packet_bytes, bytes_read, diag);
 997			return retval;
 998		} else if (packet_bytes == 2) {
 999			unsigned char s0 = ftdi->bulk_in_buffer[0];
1000			unsigned char s1 = ftdi->bulk_in_buffer[1];
1001			empty_packets += 1;
1002			if (s0 == 0x31 && s1 == 0x60) {
1003				if (retry_on_empty-- > 0) {
1004					goto more;
1005				} else
1006					return 0;
1007			} else if (s0 == 0x31 && s1 == 0x00) {
1008				if (retry_on_empty-- > 0) {
1009					goto more;
1010				} else
1011					return 0;
1012			} else {
1013				if (retry_on_empty-- > 0) {
1014					goto more;
1015				} else
1016					return 0;
1017			}
1018		} else if (packet_bytes == 1) {
1019			if (retry_on_empty-- > 0) {
1020				goto more;
1021			} else
1022				return 0;
1023		} else {
1024			if (retry_on_empty-- > 0) {
1025				goto more;
1026			} else
1027				return 0;
1028		}
1029	}
1030more:{
1031		goto read;
1032	}
1033have:if (ftdi->bulk_in_left > 0) {
1034		u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last];
1035		bytes_read += 1;
1036		ftdi->bulk_in_left -= 1;
1037		if (ftdi->received == 0 && c == 0xFF) {
1038			goto have;
1039		} else
1040			*b++ = c;
1041		if (++ftdi->received < ftdi->expected) {
1042			goto have;
1043		} else if (ftdi->ed_found) {
1044			int ed_number = (ftdi->response[0] >> 5) & 0x03;
1045			u16 ed_length = (ftdi->response[2] << 8) |
1046				ftdi->response[1];
1047			struct u132_target *target = &ftdi->target[ed_number];
1048			int payload = (ed_length >> 0) & 0x07FF;
1049			char diag[30 *3 + 4];
1050			char *d = diag;
1051			int m = payload;
1052			u8 *c = 4 + ftdi->response;
1053			int s = (sizeof(diag) - 1) / 3;
1054			diag[0] = 0;
1055			while (s-- > 0 && m-- > 0) {
1056				if (s > 0 || m == 0) {
1057					d += sprintf(d, " %02X", *c++);
1058				} else
1059					d += sprintf(d, " ..");
1060			}
1061			ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
1062					      payload);
1063			ftdi->received = 0;
1064			ftdi->expected = 4;
1065			ftdi->ed_found = 0;
1066			b = ftdi->response;
1067			goto have;
1068		} else if (ftdi->expected == 8) {
1069			u8 buscmd;
1070			int respond_head = ftdi->respond_head++;
1071			struct u132_respond *respond = &ftdi->respond[
1072				RESPOND_MASK & respond_head];
1073			u32 data = ftdi->response[7];
1074			data <<= 8;
1075			data |= ftdi->response[6];
1076			data <<= 8;
1077			data |= ftdi->response[5];
1078			data <<= 8;
1079			data |= ftdi->response[4];
1080			*respond->value = data;
1081			*respond->result = 0;
1082			complete(&respond->wait_completion);
1083			ftdi->received = 0;
1084			ftdi->expected = 4;
1085			ftdi->ed_found = 0;
1086			b = ftdi->response;
1087			buscmd = (ftdi->response[0] >> 0) & 0x0F;
1088			if (buscmd == 0x00) {
1089			} else if (buscmd == 0x02) {
1090			} else if (buscmd == 0x06) {
1091			} else if (buscmd == 0x0A) {
1092			} else
1093				dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) value = %08X\n",
1094					buscmd, data);
1095			goto have;
1096		} else {
1097			if ((ftdi->response[0] & 0x80) == 0x00) {
1098				ftdi->expected = 8;
1099				goto have;
1100			} else {
1101				int ed_number = (ftdi->response[0] >> 5) & 0x03;
1102				int ed_type = (ftdi->response[0] >> 0) & 0x03;
1103				u16 ed_length = (ftdi->response[2] << 8) |
1104					ftdi->response[1];
1105				struct u132_target *target = &ftdi->target[
1106					ed_number];
1107				target->halted = (ftdi->response[0] >> 3) &
1108					0x01;
1109				target->skipped = (ftdi->response[0] >> 2) &
1110					0x01;
1111				target->toggle_bits = (ftdi->response[3] >> 6)
1112					& 0x03;
1113				target->error_count = (ftdi->response[3] >> 4)
1114					& 0x03;
1115				target->condition_code = (ftdi->response[
1116								  3] >> 0) & 0x0F;
1117				if ((ftdi->response[0] & 0x10) == 0x00) {
1118					b = have_ed_set_response(ftdi, target,
1119								 ed_length, ed_number, ed_type,
1120								 b);
1121					goto have;
1122				} else {
1123					b = have_ed_get_response(ftdi, target,
1124								 ed_length, ed_number, ed_type,
1125								 b);
1126					goto have;
1127				}
1128			}
1129		}
1130	} else
1131		goto more;
1132}
1133
1134
1135/*
1136 * create a urb, and a buffer for it, and copy the data to the urb
1137 *
1138 */
1139static ssize_t ftdi_elan_write(struct file *file,
1140			       const char __user *user_buffer, size_t count,
1141			       loff_t *ppos)
1142{
1143	int retval = 0;
1144	struct urb *urb;
1145	char *buf;
1146	struct usb_ftdi *ftdi = file->private_data;
1147
1148	if (ftdi->disconnected > 0) {
1149		return -ENODEV;
1150	}
1151	if (count == 0) {
1152		goto exit;
1153	}
1154	urb = usb_alloc_urb(0, GFP_KERNEL);
1155	if (!urb) {
1156		retval = -ENOMEM;
1157		goto error_1;
1158	}
1159	buf = usb_alloc_coherent(ftdi->udev, count, GFP_KERNEL,
1160				 &urb->transfer_dma);
1161	if (!buf) {
1162		retval = -ENOMEM;
1163		goto error_2;
1164	}
1165	if (copy_from_user(buf, user_buffer, count)) {
1166		retval = -EFAULT;
1167		goto error_3;
1168	}
1169	usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1170							   ftdi->bulk_out_endpointAddr), buf, count,
1171			  ftdi_elan_write_bulk_callback, ftdi);
1172	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1173	retval = usb_submit_urb(urb, GFP_KERNEL);
1174	if (retval) {
1175		dev_err(&ftdi->udev->dev,
1176			"failed submitting write urb, error %d\n", retval);
1177		goto error_3;
1178	}
1179	usb_free_urb(urb);
1180
1181exit:
1182	return count;
1183error_3:
1184	usb_free_coherent(ftdi->udev, count, buf, urb->transfer_dma);
1185error_2:
1186	usb_free_urb(urb);
1187error_1:
1188	return retval;
1189}
1190
1191static const struct file_operations ftdi_elan_fops = {
1192	.owner = THIS_MODULE,
1193	.llseek = no_llseek,
1194	.read = ftdi_elan_read,
1195	.write = ftdi_elan_write,
1196	.open = ftdi_elan_open,
1197	.release = ftdi_elan_release,
1198};
1199
1200/*
1201 * usb class driver info in order to get a minor number from the usb core,
1202 * and to have the device registered with the driver core
1203 */
1204static struct usb_class_driver ftdi_elan_jtag_class = {
1205	.name = "ftdi-%d-jtag",
1206	.fops = &ftdi_elan_fops,
1207	.minor_base = USB_FTDI_ELAN_MINOR_BASE,
1208};
1209
1210/*
1211 * the following definitions are for the
1212 * ELAN FPGA state machgine processor that
1213 * lies on the other side of the FTDI chip
1214 */
1215#define cPCIu132rd 0x0
1216#define cPCIu132wr 0x1
1217#define cPCIiord 0x2
1218#define cPCIiowr 0x3
1219#define cPCImemrd 0x6
1220#define cPCImemwr 0x7
1221#define cPCIcfgrd 0xA
1222#define cPCIcfgwr 0xB
1223#define cPCInull 0xF
1224#define cU132cmd_status 0x0
1225#define cU132flash 0x1
1226#define cPIDsetup 0x0
1227#define cPIDout 0x1
1228#define cPIDin 0x2
1229#define cPIDinonce 0x3
1230#define cCCnoerror 0x0
1231#define cCCcrc 0x1
1232#define cCCbitstuff 0x2
1233#define cCCtoggle 0x3
1234#define cCCstall 0x4
1235#define cCCnoresp 0x5
1236#define cCCbadpid1 0x6
1237#define cCCbadpid2 0x7
1238#define cCCdataoverrun 0x8
1239#define cCCdataunderrun 0x9
1240#define cCCbuffoverrun 0xC
1241#define cCCbuffunderrun 0xD
1242#define cCCnotaccessed 0xF
1243static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1244{
1245wait:if (ftdi->disconnected > 0) {
1246		return -ENODEV;
1247	} else {
1248		int command_size;
1249		mutex_lock(&ftdi->u132_lock);
1250		command_size = ftdi->command_next - ftdi->command_head;
1251		if (command_size < COMMAND_SIZE) {
1252			struct u132_command *command = &ftdi->command[
1253				COMMAND_MASK & ftdi->command_next];
1254			command->header = 0x00 | cPCIu132wr;
1255			command->length = 0x04;
1256			command->address = 0x00;
1257			command->width = 0x00;
1258			command->follows = 4;
1259			command->value = data;
1260			command->buffer = &command->value;
1261			ftdi->command_next += 1;
1262			ftdi_elan_kick_command_queue(ftdi);
1263			mutex_unlock(&ftdi->u132_lock);
1264			return 0;
1265		} else {
1266			mutex_unlock(&ftdi->u132_lock);
1267			msleep(100);
1268			goto wait;
1269		}
1270	}
1271}
1272
1273static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1274				  u8 width, u32 data)
1275{
1276	u8 addressofs = config_offset / 4;
1277wait:if (ftdi->disconnected > 0) {
1278		return -ENODEV;
1279	} else {
1280		int command_size;
1281		mutex_lock(&ftdi->u132_lock);
1282		command_size = ftdi->command_next - ftdi->command_head;
1283		if (command_size < COMMAND_SIZE) {
1284			struct u132_command *command = &ftdi->command[
1285				COMMAND_MASK & ftdi->command_next];
1286			command->header = 0x00 | (cPCIcfgwr & 0x0F);
1287			command->length = 0x04;
1288			command->address = addressofs;
1289			command->width = 0x00 | (width & 0x0F);
1290			command->follows = 4;
1291			command->value = data;
1292			command->buffer = &command->value;
1293			ftdi->command_next += 1;
1294			ftdi_elan_kick_command_queue(ftdi);
1295			mutex_unlock(&ftdi->u132_lock);
1296			return 0;
1297		} else {
1298			mutex_unlock(&ftdi->u132_lock);
1299			msleep(100);
1300			goto wait;
1301		}
1302	}
1303}
1304
1305static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1306				  u8 width, u32 data)
1307{
1308	u8 addressofs = mem_offset / 4;
1309wait:if (ftdi->disconnected > 0) {
1310		return -ENODEV;
1311	} else {
1312		int command_size;
1313		mutex_lock(&ftdi->u132_lock);
1314		command_size = ftdi->command_next - ftdi->command_head;
1315		if (command_size < COMMAND_SIZE) {
1316			struct u132_command *command = &ftdi->command[
1317				COMMAND_MASK & ftdi->command_next];
1318			command->header = 0x00 | (cPCImemwr & 0x0F);
1319			command->length = 0x04;
1320			command->address = addressofs;
1321			command->width = 0x00 | (width & 0x0F);
1322			command->follows = 4;
1323			command->value = data;
1324			command->buffer = &command->value;
1325			ftdi->command_next += 1;
1326			ftdi_elan_kick_command_queue(ftdi);
1327			mutex_unlock(&ftdi->u132_lock);
1328			return 0;
1329		} else {
1330			mutex_unlock(&ftdi->u132_lock);
1331			msleep(100);
1332			goto wait;
1333		}
1334	}
1335}
1336
1337int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset,
1338			       u8 width, u32 data)
1339{
1340	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1341	return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data);
1342}
1343
1344
1345EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1346static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1347{
1348wait:if (ftdi->disconnected > 0) {
1349		return -ENODEV;
1350	} else {
1351		int command_size;
1352		int respond_size;
1353		mutex_lock(&ftdi->u132_lock);
1354		command_size = ftdi->command_next - ftdi->command_head;
1355		respond_size = ftdi->respond_next - ftdi->respond_head;
1356		if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1357		{
1358			struct u132_command *command = &ftdi->command[
1359				COMMAND_MASK & ftdi->command_next];
1360			struct u132_respond *respond = &ftdi->respond[
1361				RESPOND_MASK & ftdi->respond_next];
1362			int result = -ENODEV;
1363			respond->result = &result;
1364			respond->header = command->header = 0x00 | cPCIu132rd;
1365			command->length = 0x04;
1366			respond->address = command->address = cU132cmd_status;
1367			command->width = 0x00;
1368			command->follows = 0;
1369			command->value = 0;
1370			command->buffer = NULL;
1371			respond->value = data;
1372			init_completion(&respond->wait_completion);
1373			ftdi->command_next += 1;
1374			ftdi->respond_next += 1;
1375			ftdi_elan_kick_command_queue(ftdi);
1376			mutex_unlock(&ftdi->u132_lock);
1377			wait_for_completion(&respond->wait_completion);
1378			return result;
1379		} else {
1380			mutex_unlock(&ftdi->u132_lock);
1381			msleep(100);
1382			goto wait;
1383		}
1384	}
1385}
1386
1387static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1388				 u8 width, u32 *data)
1389{
1390	u8 addressofs = config_offset / 4;
1391wait:if (ftdi->disconnected > 0) {
1392		return -ENODEV;
1393	} else {
1394		int command_size;
1395		int respond_size;
1396		mutex_lock(&ftdi->u132_lock);
1397		command_size = ftdi->command_next - ftdi->command_head;
1398		respond_size = ftdi->respond_next - ftdi->respond_head;
1399		if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1400		{
1401			struct u132_command *command = &ftdi->command[
1402				COMMAND_MASK & ftdi->command_next];
1403			struct u132_respond *respond = &ftdi->respond[
1404				RESPOND_MASK & ftdi->respond_next];
1405			int result = -ENODEV;
1406			respond->result = &result;
1407			respond->header = command->header = 0x00 | (cPCIcfgrd &
1408								    0x0F);
1409			command->length = 0x04;
1410			respond->address = command->address = addressofs;
1411			command->width = 0x00 | (width & 0x0F);
1412			command->follows = 0;
1413			command->value = 0;
1414			command->buffer = NULL;
1415			respond->value = data;
1416			init_completion(&respond->wait_completion);
1417			ftdi->command_next += 1;
1418			ftdi->respond_next += 1;
1419			ftdi_elan_kick_command_queue(ftdi);
1420			mutex_unlock(&ftdi->u132_lock);
1421			wait_for_completion(&respond->wait_completion);
1422			return result;
1423		} else {
1424			mutex_unlock(&ftdi->u132_lock);
1425			msleep(100);
1426			goto wait;
1427		}
1428	}
1429}
1430
1431static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1432				 u8 width, u32 *data)
1433{
1434	u8 addressofs = mem_offset / 4;
1435wait:if (ftdi->disconnected > 0) {
1436		return -ENODEV;
1437	} else {
1438		int command_size;
1439		int respond_size;
1440		mutex_lock(&ftdi->u132_lock);
1441		command_size = ftdi->command_next - ftdi->command_head;
1442		respond_size = ftdi->respond_next - ftdi->respond_head;
1443		if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1444		{
1445			struct u132_command *command = &ftdi->command[
1446				COMMAND_MASK & ftdi->command_next];
1447			struct u132_respond *respond = &ftdi->respond[
1448				RESPOND_MASK & ftdi->respond_next];
1449			int result = -ENODEV;
1450			respond->result = &result;
1451			respond->header = command->header = 0x00 | (cPCImemrd &
1452								    0x0F);
1453			command->length = 0x04;
1454			respond->address = command->address = addressofs;
1455			command->width = 0x00 | (width & 0x0F);
1456			command->follows = 0;
1457			command->value = 0;
1458			command->buffer = NULL;
1459			respond->value = data;
1460			init_completion(&respond->wait_completion);
1461			ftdi->command_next += 1;
1462			ftdi->respond_next += 1;
1463			ftdi_elan_kick_command_queue(ftdi);
1464			mutex_unlock(&ftdi->u132_lock);
1465			wait_for_completion(&respond->wait_completion);
1466			return result;
1467		} else {
1468			mutex_unlock(&ftdi->u132_lock);
1469			msleep(100);
1470			goto wait;
1471		}
1472	}
1473}
1474
1475int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset,
1476			      u8 width, u32 *data)
1477{
1478	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1479	if (ftdi->initialized == 0) {
1480		return -ENODEV;
1481	} else
1482		return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data);
1483}
1484
1485
1486EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1487static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number,
1488				 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1489				 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1490						   int toggle_bits, int error_count, int condition_code, int repeat_number,
1491						   int halted, int skipped, int actual, int non_null))
1492{
1493	u8 ed = ed_number - 1;
1494wait:if (ftdi->disconnected > 0) {
1495		return -ENODEV;
1496	} else if (ftdi->initialized == 0) {
1497		return -ENODEV;
1498	} else {
1499		int command_size;
1500		mutex_lock(&ftdi->u132_lock);
1501		command_size = ftdi->command_next - ftdi->command_head;
1502		if (command_size < COMMAND_SIZE) {
1503			struct u132_target *target = &ftdi->target[ed];
1504			struct u132_command *command = &ftdi->command[
1505				COMMAND_MASK & ftdi->command_next];
1506			command->header = 0x80 | (ed << 5);
1507			command->length = 0x8007;
1508			command->address = (toggle_bits << 6) | (ep_number << 2)
1509				| (address << 0);
1510			command->width = usb_maxpacket(urb->dev, urb->pipe,
1511						       usb_pipeout(urb->pipe));
1512			command->follows = 8;
1513			command->value = 0;
1514			command->buffer = urb->setup_packet;
1515			target->callback = callback;
1516			target->endp = endp;
1517			target->urb = urb;
1518			target->active = 1;
1519			ftdi->command_next += 1;
1520			ftdi_elan_kick_command_queue(ftdi);
1521			mutex_unlock(&ftdi->u132_lock);
1522			return 0;
1523		} else {
1524			mutex_unlock(&ftdi->u132_lock);
1525			msleep(100);
1526			goto wait;
1527		}
1528	}
1529}
1530
1531int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number,
1532			      void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1533			      void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1534						int toggle_bits, int error_count, int condition_code, int repeat_number,
1535						int halted, int skipped, int actual, int non_null))
1536{
1537	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1538	return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address,
1539				     ep_number, toggle_bits, callback);
1540}
1541
1542
1543EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1544static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
1545				 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1546				 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1547						   int toggle_bits, int error_count, int condition_code, int repeat_number,
1548						   int halted, int skipped, int actual, int non_null))
1549{
1550	u8 ed = ed_number - 1;
1551wait:if (ftdi->disconnected > 0) {
1552		return -ENODEV;
1553	} else if (ftdi->initialized == 0) {
1554		return -ENODEV;
1555	} else {
1556		int command_size;
1557		mutex_lock(&ftdi->u132_lock);
1558		command_size = ftdi->command_next - ftdi->command_head;
1559		if (command_size < COMMAND_SIZE) {
1560			struct u132_target *target = &ftdi->target[ed];
1561			struct u132_command *command = &ftdi->command[
1562				COMMAND_MASK & ftdi->command_next];
1563			u32 remaining_length = urb->transfer_buffer_length -
1564				urb->actual_length;
1565			command->header = 0x82 | (ed << 5);
1566			if (remaining_length == 0) {
1567				command->length = 0x0000;
1568			} else if (remaining_length > 1024) {
1569				command->length = 0x8000 | 1023;
1570			} else
1571				command->length = 0x8000 | (remaining_length -
1572							    1);
1573			command->address = (toggle_bits << 6) | (ep_number << 2)
1574				| (address << 0);
1575			command->width = usb_maxpacket(urb->dev, urb->pipe,
1576						       usb_pipeout(urb->pipe));
1577			command->follows = 0;
1578			command->value = 0;
1579			command->buffer = NULL;
1580			target->callback = callback;
1581			target->endp = endp;
1582			target->urb = urb;
1583			target->active = 1;
1584			ftdi->command_next += 1;
1585			ftdi_elan_kick_command_queue(ftdi);
1586			mutex_unlock(&ftdi->u132_lock);
1587			return 0;
1588		} else {
1589			mutex_unlock(&ftdi->u132_lock);
1590			msleep(100);
1591			goto wait;
1592		}
1593	}
1594}
1595
1596int usb_ftdi_elan_edset_input(struct platform_device *pdev, u8 ed_number,
1597			      void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1598			      void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1599						int toggle_bits, int error_count, int condition_code, int repeat_number,
1600						int halted, int skipped, int actual, int non_null))
1601{
1602	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1603	return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address,
1604				     ep_number, toggle_bits, callback);
1605}
1606
1607
1608EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1609static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number,
1610				 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1611				 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1612						   int toggle_bits, int error_count, int condition_code, int repeat_number,
1613						   int halted, int skipped, int actual, int non_null))
1614{
1615	u8 ed = ed_number - 1;
1616wait:if (ftdi->disconnected > 0) {
1617		return -ENODEV;
1618	} else if (ftdi->initialized == 0) {
1619		return -ENODEV;
1620	} else {
1621		int command_size;
1622		mutex_lock(&ftdi->u132_lock);
1623		command_size = ftdi->command_next - ftdi->command_head;
1624		if (command_size < COMMAND_SIZE) {
1625			struct u132_target *target = &ftdi->target[ed];
1626			struct u132_command *command = &ftdi->command[
1627				COMMAND_MASK & ftdi->command_next];
1628			command->header = 0x81 | (ed << 5);
1629			command->length = 0x0000;
1630			command->address = (toggle_bits << 6) | (ep_number << 2)
1631				| (address << 0);
1632			command->width = usb_maxpacket(urb->dev, urb->pipe,
1633						       usb_pipeout(urb->pipe));
1634			command->follows = 0;
1635			command->value = 0;
1636			command->buffer = NULL;
1637			target->callback = callback;
1638			target->endp = endp;
1639			target->urb = urb;
1640			target->active = 1;
1641			ftdi->command_next += 1;
1642			ftdi_elan_kick_command_queue(ftdi);
1643			mutex_unlock(&ftdi->u132_lock);
1644			return 0;
1645		} else {
1646			mutex_unlock(&ftdi->u132_lock);
1647			msleep(100);
1648			goto wait;
1649		}
1650	}
1651}
1652
1653int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number,
1654			      void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1655			      void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1656						int toggle_bits, int error_count, int condition_code, int repeat_number,
1657						int halted, int skipped, int actual, int non_null))
1658{
1659	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1660	return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address,
1661				     ep_number, toggle_bits, callback);
1662}
1663
1664
1665EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1666static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
1667				  void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1668				  void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1669						    int toggle_bits, int error_count, int condition_code, int repeat_number,
1670						    int halted, int skipped, int actual, int non_null))
1671{
1672	u8 ed = ed_number - 1;
1673wait:if (ftdi->disconnected > 0) {
1674		return -ENODEV;
1675	} else if (ftdi->initialized == 0) {
1676		return -ENODEV;
1677	} else {
1678		int command_size;
1679		mutex_lock(&ftdi->u132_lock);
1680		command_size = ftdi->command_next - ftdi->command_head;
1681		if (command_size < COMMAND_SIZE) {
1682			u8 *b;
1683			u16 urb_size;
1684			int i = 0;
1685			char data[30 *3 + 4];
1686			char *d = data;
1687			int m = (sizeof(data) - 1) / 3;
1688			int l = 0;
1689			struct u132_target *target = &ftdi->target[ed];
1690			struct u132_command *command = &ftdi->command[
1691				COMMAND_MASK & ftdi->command_next];
1692			command->header = 0x81 | (ed << 5);
1693			command->address = (toggle_bits << 6) | (ep_number << 2)
1694				| (address << 0);
1695			command->width = usb_maxpacket(urb->dev, urb->pipe,
1696						       usb_pipeout(urb->pipe));
1697			command->follows = min_t(u32, 1024,
1698						 urb->transfer_buffer_length -
1699						 urb->actual_length);
1700			command->value = 0;
1701			command->buffer = urb->transfer_buffer +
1702				urb->actual_length;
1703			command->length = 0x8000 | (command->follows - 1);
1704			b = command->buffer;
1705			urb_size = command->follows;
1706			data[0] = 0;
1707			while (urb_size-- > 0) {
1708				if (i > m) {
1709				} else if (i++ < m) {
1710					int w = sprintf(d, " %02X", *b++);
1711					d += w;
1712					l += w;
1713				} else
1714					d += sprintf(d, " ..");
1715			}
1716			target->callback = callback;
1717			target->endp = endp;
1718			target->urb = urb;
1719			target->active = 1;
1720			ftdi->command_next += 1;
1721			ftdi_elan_kick_command_queue(ftdi);
1722			mutex_unlock(&ftdi->u132_lock);
1723			return 0;
1724		} else {
1725			mutex_unlock(&ftdi->u132_lock);
1726			msleep(100);
1727			goto wait;
1728		}
1729	}
1730}
1731
1732int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1733			       void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1734			       void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1735						 int toggle_bits, int error_count, int condition_code, int repeat_number,
1736						 int halted, int skipped, int actual, int non_null))
1737{
1738	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1739	return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1740				      ep_number, toggle_bits, callback);
1741}
1742
1743
1744EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1745static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1746				  void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1747				  void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1748						    int toggle_bits, int error_count, int condition_code, int repeat_number,
1749						    int halted, int skipped, int actual, int non_null))
1750{
1751	u8 ed = ed_number - 1;
1752wait:if (ftdi->disconnected > 0) {
1753		return -ENODEV;
1754	} else if (ftdi->initialized == 0) {
1755		return -ENODEV;
1756	} else {
1757		int command_size;
1758		mutex_lock(&ftdi->u132_lock);
1759		command_size = ftdi->command_next - ftdi->command_head;
1760		if (command_size < COMMAND_SIZE) {
1761			u32 remaining_length = urb->transfer_buffer_length -
1762				urb->actual_length;
1763			struct u132_target *target = &ftdi->target[ed];
1764			struct u132_command *command = &ftdi->command[
1765				COMMAND_MASK & ftdi->command_next];
1766			command->header = 0x83 | (ed << 5);
1767			if (remaining_length == 0) {
1768				command->length = 0x0000;
1769			} else if (remaining_length > 1024) {
1770				command->length = 0x8000 | 1023;
1771			} else
1772				command->length = 0x8000 | (remaining_length -
1773							    1);
1774			command->address = (toggle_bits << 6) | (ep_number << 2)
1775				| (address << 0);
1776			command->width = usb_maxpacket(urb->dev, urb->pipe,
1777						       usb_pipeout(urb->pipe));
1778			command->follows = 0;
1779			command->value = 0;
1780			command->buffer = NULL;
1781			target->callback = callback;
1782			target->endp = endp;
1783			target->urb = urb;
1784			target->active = 1;
1785			ftdi->command_next += 1;
1786			ftdi_elan_kick_command_queue(ftdi);
1787			mutex_unlock(&ftdi->u132_lock);
1788			return 0;
1789		} else {
1790			mutex_unlock(&ftdi->u132_lock);
1791			msleep(100);
1792			goto wait;
1793		}
1794	}
1795}
1796
1797int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1798			       void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1799			       void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1800						 int toggle_bits, int error_count, int condition_code, int repeat_number,
1801						 int halted, int skipped, int actual, int non_null))
1802{
1803	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1804	return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1805				      ep_number, toggle_bits, callback);
1806}
1807
1808
1809EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1810static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1811				 void *endp)
1812{
1813	u8 ed = ed_number - 1;
1814	if (ftdi->disconnected > 0) {
1815		return -ENODEV;
1816	} else if (ftdi->initialized == 0) {
1817		return -ENODEV;
1818	} else {
1819		struct u132_target *target = &ftdi->target[ed];
1820		mutex_lock(&ftdi->u132_lock);
1821		if (target->abandoning > 0) {
1822			mutex_unlock(&ftdi->u132_lock);
1823			return 0;
1824		} else {
1825			target->abandoning = 1;
1826		wait_1:if (target->active == 1) {
1827				int command_size = ftdi->command_next -
1828					ftdi->command_head;
1829				if (command_size < COMMAND_SIZE) {
1830					struct u132_command *command =
1831						&ftdi->command[COMMAND_MASK &
1832							       ftdi->command_next];
1833					command->header = 0x80 | (ed << 5) |
1834						0x4;
1835					command->length = 0x00;
1836					command->address = 0x00;
1837					command->width = 0x00;
1838					command->follows = 0;
1839					command->value = 0;
1840					command->buffer = &command->value;
1841					ftdi->command_next += 1;
1842					ftdi_elan_kick_command_queue(ftdi);
1843				} else {
1844					mutex_unlock(&ftdi->u132_lock);
1845					msleep(100);
1846					mutex_lock(&ftdi->u132_lock);
1847					goto wait_1;
1848				}
1849			}
1850			mutex_unlock(&ftdi->u132_lock);
1851			return 0;
1852		}
1853	}
1854}
1855
1856int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1857			      void *endp)
1858{
1859	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1860	return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1861}
1862
1863
1864EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1865static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1866{
1867	int retry_on_empty = 10;
1868	int retry_on_timeout = 5;
1869	int retry_on_status = 20;
1870more:{
1871		int packet_bytes = 0;
1872		int retval = usb_bulk_msg(ftdi->udev,
1873					  usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1874					  ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1875					  &packet_bytes, 100);
1876		if (packet_bytes > 2) {
1877			char diag[30 *3 + 4];
1878			char *d = diag;
1879			int m = (sizeof(diag) - 1) / 3;
1880			char *b = ftdi->bulk_in_buffer;
1881			int bytes_read = 0;
1882			diag[0] = 0;
1883			while (packet_bytes-- > 0) {
1884				char c = *b++;
1885				if (bytes_read < m) {
1886					d += sprintf(d, " %02X",
1887						     0x000000FF & c);
1888				} else if (bytes_read > m) {
1889				} else
1890					d += sprintf(d, " ..");
1891				bytes_read += 1;
1892				continue;
1893			}
1894			goto more;
1895		} else if (packet_bytes > 1) {
1896			char s1 = ftdi->bulk_in_buffer[0];
1897			char s2 = ftdi->bulk_in_buffer[1];
1898			if (s1 == 0x31 && s2 == 0x60) {
1899				return 0;
1900			} else if (retry_on_status-- > 0) {
1901				goto more;
1902			} else {
1903				dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1904				return -EFAULT;
1905			}
1906		} else if (packet_bytes > 0) {
1907			char b1 = ftdi->bulk_in_buffer[0];
1908			dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n",
1909				b1);
1910			if (retry_on_status-- > 0) {
1911				goto more;
1912			} else {
1913				dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1914				return -EFAULT;
1915			}
1916		} else if (retval == -ETIMEDOUT) {
1917			if (retry_on_timeout-- > 0) {
1918				goto more;
1919			} else {
1920				dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
1921				return -ENOMEM;
1922			}
1923		} else if (retval == 0) {
1924			if (retry_on_empty-- > 0) {
1925				goto more;
1926			} else {
1927				dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
1928				return -ENOMEM;
1929			}
1930		} else {
1931			dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1932			return retval;
1933		}
1934	}
1935	return -1;
1936}
1937
1938
1939/*
1940 * send the long flush sequence
1941 *
1942 */
1943static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1944{
1945	int retval;
1946	struct urb *urb;
1947	char *buf;
1948	int I = 257;
1949	int i = 0;
1950	urb = usb_alloc_urb(0, GFP_KERNEL);
1951	if (!urb) {
1952		dev_err(&ftdi->udev->dev, "could not alloc a urb for flush sequence\n");
1953		return -ENOMEM;
1954	}
1955	buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1956	if (!buf) {
1957		dev_err(&ftdi->udev->dev, "could not get a buffer for flush sequence\n");
1958		usb_free_urb(urb);
1959		return -ENOMEM;
1960	}
1961	while (I-- > 0)
1962		buf[i++] = 0x55;
1963	usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1964							   ftdi->bulk_out_endpointAddr), buf, i,
1965			  ftdi_elan_write_bulk_callback, ftdi);
1966	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1967	retval = usb_submit_urb(urb, GFP_KERNEL);
1968	if (retval) {
1969		dev_err(&ftdi->udev->dev, "failed to submit urb containing the flush sequence\n");
1970		usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1971		usb_free_urb(urb);
1972		return -ENOMEM;
1973	}
1974	usb_free_urb(urb);
1975	return 0;
1976}
1977
1978
1979/*
1980 * send the reset sequence
1981 *
1982 */
1983static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
1984{
1985	int retval;
1986	struct urb *urb;
1987	char *buf;
1988	int I = 4;
1989	int i = 0;
1990	urb = usb_alloc_urb(0, GFP_KERNEL);
1991	if (!urb) {
1992		dev_err(&ftdi->udev->dev, "could not get a urb for the reset sequence\n");
1993		return -ENOMEM;
1994	}
1995	buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1996	if (!buf) {
1997		dev_err(&ftdi->udev->dev, "could not get a buffer for the reset sequence\n");
1998		usb_free_urb(urb);
1999		return -ENOMEM;
2000	}
2001	buf[i++] = 0x55;
2002	buf[i++] = 0xAA;
2003	buf[i++] = 0x5A;
2004	buf[i++] = 0xA5;
2005	usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
2006							   ftdi->bulk_out_endpointAddr), buf, i,
2007			  ftdi_elan_write_bulk_callback, ftdi);
2008	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
2009	retval = usb_submit_urb(urb, GFP_KERNEL);
2010	if (retval) {
2011		dev_err(&ftdi->udev->dev, "failed to submit urb containing the reset sequence\n");
2012		usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
2013		usb_free_urb(urb);
2014		return -ENOMEM;
2015	}
2016	usb_free_urb(urb);
2017	return 0;
2018}
2019
2020static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
2021{
2022	int retval;
2023	int long_stop = 10;
2024	int retry_on_timeout = 5;
2025	int retry_on_empty = 10;
2026	int err_count = 0;
2027	retval = ftdi_elan_flush_input_fifo(ftdi);
2028	if (retval)
2029		return retval;
2030	ftdi->bulk_in_left = 0;
2031	ftdi->bulk_in_last = -1;
2032	while (long_stop-- > 0) {
2033		int read_stop;
2034		int read_stuck;
2035		retval = ftdi_elan_synchronize_flush(ftdi);
2036		if (retval)
2037			return retval;
2038		retval = ftdi_elan_flush_input_fifo(ftdi);
2039		if (retval)
2040			return retval;
2041	reset:retval = ftdi_elan_synchronize_reset(ftdi);
2042		if (retval)
2043			return retval;
2044		read_stop = 100;
2045		read_stuck = 10;
2046	read:{
2047			int packet_bytes = 0;
2048			retval = usb_bulk_msg(ftdi->udev,
2049					      usb_rcvbulkpipe(ftdi->udev,
2050							      ftdi->bulk_in_endpointAddr),
2051					      ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2052					      &packet_bytes, 500);
2053			if (packet_bytes > 2) {
2054				char diag[30 *3 + 4];
2055				char *d = diag;
2056				int m = (sizeof(diag) - 1) / 3;
2057				char *b = ftdi->bulk_in_buffer;
2058				int bytes_read = 0;
2059				unsigned char c = 0;
2060				diag[0] = 0;
2061				while (packet_bytes-- > 0) {
2062					c = *b++;
2063					if (bytes_read < m) {
2064						d += sprintf(d, " %02X", c);
2065					} else if (bytes_read > m) {
2066					} else
2067						d += sprintf(d, " ..");
2068					bytes_read += 1;
2069					continue;
2070				}
2071				if (c == 0x7E) {
2072					return 0;
2073				} else {
2074					if (c == 0x55) {
2075						goto read;
2076					} else if (read_stop-- > 0) {
2077						goto read;
2078					} else {
2079						dev_err(&ftdi->udev->dev, "retry limit reached\n");
2080						continue;
2081					}
2082				}
2083			} else if (packet_bytes > 1) {
2084				unsigned char s1 = ftdi->bulk_in_buffer[0];
2085				unsigned char s2 = ftdi->bulk_in_buffer[1];
2086				if (s1 == 0x31 && s2 == 0x00) {
2087					if (read_stuck-- > 0) {
2088						goto read;
2089					} else
2090						goto reset;
2091				} else if (s1 == 0x31 && s2 == 0x60) {
2092					if (read_stop-- > 0) {
2093						goto read;
2094					} else {
2095						dev_err(&ftdi->udev->dev, "retry limit reached\n");
2096						continue;
2097					}
2098				} else {
2099					if (read_stop-- > 0) {
2100						goto read;
2101					} else {
2102						dev_err(&ftdi->udev->dev, "retry limit reached\n");
2103						continue;
2104					}
2105				}
2106			} else if (packet_bytes > 0) {
2107				if (read_stop-- > 0) {
2108					goto read;
2109				} else {
2110					dev_err(&ftdi->udev->dev, "retry limit reached\n");
2111					continue;
2112				}
2113			} else if (retval == -ETIMEDOUT) {
2114				if (retry_on_timeout-- > 0) {
2115					goto read;
2116				} else {
2117					dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2118					continue;
2119				}
2120			} else if (retval == 0) {
2121				if (retry_on_empty-- > 0) {
2122					goto read;
2123				} else {
2124					dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2125					continue;
2126				}
2127			} else {
2128				err_count += 1;
2129				dev_err(&ftdi->udev->dev, "error = %d\n",
2130					retval);
2131				if (read_stop-- > 0) {
2132					goto read;
2133				} else {
2134					dev_err(&ftdi->udev->dev, "retry limit reached\n");
2135					continue;
2136				}
2137			}
2138		}
2139	}
2140	dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2141	return -EFAULT;
2142}
2143
2144static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2145{
2146	int retry_on_empty = 10;
2147	int retry_on_timeout = 5;
2148	int retry_on_status = 50;
2149more:{
2150		int packet_bytes = 0;
2151		int retval = usb_bulk_msg(ftdi->udev,
2152					  usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2153					  ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2154					  &packet_bytes, 1000);
2155		if (packet_bytes > 2) {
2156			char diag[30 *3 + 4];
2157			char *d = diag;
2158			int m = (sizeof(diag) - 1) / 3;
2159			char *b = ftdi->bulk_in_buffer;
2160			int bytes_read = 0;
2161			diag[0] = 0;
2162			while (packet_bytes-- > 0) {
2163				char c = *b++;
2164				if (bytes_read < m) {
2165					d += sprintf(d, " %02X",
2166						     0x000000FF & c);
2167				} else if (bytes_read > m) {
2168				} else
2169					d += sprintf(d, " ..");
2170				bytes_read += 1;
2171				continue;
2172			}
2173			goto more;
2174		} else if (packet_bytes > 1) {
2175			char s1 = ftdi->bulk_in_buffer[0];
2176			char s2 = ftdi->bulk_in_buffer[1];
2177			if (s1 == 0x31 && s2 == 0x60) {
2178				return 0;
2179			} else if (retry_on_status-- > 0) {
2180				msleep(5);
2181				goto more;
2182			} else
2183				return -EFAULT;
2184		} else if (packet_bytes > 0) {
2185			char b1 = ftdi->bulk_in_buffer[0];
2186			dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n", b1);
2187			if (retry_on_status-- > 0) {
2188				msleep(5);
2189				goto more;
2190			} else {
2191				dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
2192				return -EFAULT;
2193			}
2194		} else if (retval == -ETIMEDOUT) {
2195			if (retry_on_timeout-- > 0) {
2196				goto more;
2197			} else {
2198				dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2199				return -ENOMEM;
2200			}
2201		} else if (retval == 0) {
2202			if (retry_on_empty-- > 0) {
2203				goto more;
2204			} else {
2205				dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2206				return -ENOMEM;
2207			}
2208		} else {
2209			dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2210			return -ENOMEM;
2211		}
2212	}
2213	return -1;
2214}
2215
2216static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2217{
2218	int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2219	if (UxxxStatus)
2220		return UxxxStatus;
2221	if (ftdi->controlreg & 0x00400000) {
2222		if (ftdi->card_ejected) {
2223		} else {
2224			ftdi->card_ejected = 1;
2225			dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = %08X\n",
2226				ftdi->controlreg);
2227		}
2228		return -ENODEV;
2229	} else {
2230		u8 fn = ftdi->function - 1;
2231		int activePCIfn = fn << 8;
2232		u32 pcidata;
2233		u32 pciVID;
2234		u32 pciPID;
2235		int reg = 0;
2236		UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2237						   &pcidata);
2238		if (UxxxStatus)
2239			return UxxxStatus;
2240		pciVID = pcidata & 0xFFFF;
2241		pciPID = (pcidata >> 16) & 0xFFFF;
2242		if (pciVID == ftdi->platform_data.vendor && pciPID ==
2243		    ftdi->platform_data.device) {
2244			return 0;
2245		} else {
2246			dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X device=%04X pciPID=%04X\n",
2247				ftdi->platform_data.vendor, pciVID,
2248				ftdi->platform_data.device, pciPID);
2249			return -ENODEV;
2250		}
2251	}
2252}
2253
2254
2255#define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \
2256								   offsetof(struct ohci_regs, member), 0, data);
2257#define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \
2258								     offsetof(struct ohci_regs, member), 0, data);
2259
2260#define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
2261#define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD |	\
2262			OHCI_INTR_WDH)
2263static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk)
2264{
2265	int devices = 0;
2266	int retval;
2267	u32 hc_control;
2268	int num_ports;
2269	u32 control;
2270	u32 rh_a = -1;
2271	u32 status;
2272	u32 fminterval;
2273	u32 hc_fminterval;
2274	u32 periodicstart;
2275	u32 cmdstatus;
2276	u32 roothub_a;
2277	int mask = OHCI_INTR_INIT;
2278	int sleep_time = 0;
2279	int reset_timeout = 30;        /* ... allow extra time */
2280	int temp;
2281	retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE);
2282	if (retval)
2283		return retval;
2284	retval = ftdi_read_pcimem(ftdi, control, &control);
2285	if (retval)
2286		return retval;
2287	retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a);
2288	if (retval)
2289		return retval;
2290	num_ports = rh_a & RH_A_NDP;
2291	retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval);
2292	if (retval)
2293		return retval;
2294	hc_fminterval &= 0x3fff;
2295	if (hc_fminterval != FI) {
2296	}
2297	hc_fminterval |= FSMP(hc_fminterval) << 16;
2298	retval = ftdi_read_pcimem(ftdi, control, &hc_control);
2299	if (retval)
2300		return retval;
2301	switch (hc_control & OHCI_CTRL_HCFS) {
2302	case OHCI_USB_OPER:
2303		sleep_time = 0;
2304		break;
2305	case OHCI_USB_SUSPEND:
2306	case OHCI_USB_RESUME:
2307		hc_control &= OHCI_CTRL_RWC;
2308		hc_control |= OHCI_USB_RESUME;
2309		sleep_time = 10;
2310		break;
2311	default:
2312		hc_control &= OHCI_CTRL_RWC;
2313		hc_control |= OHCI_USB_RESET;
2314		sleep_time = 50;
2315		break;
2316	}
2317	retval = ftdi_write_pcimem(ftdi, control, hc_control);
2318	if (retval)
2319		return retval;
2320	retval = ftdi_read_pcimem(ftdi, control, &control);
2321	if (retval)
2322		return retval;
2323	msleep(sleep_time);
2324	retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2325	if (retval)
2326		return retval;
2327	if (!(roothub_a & RH_A_NPS)) {        /* power down each port */
2328		for (temp = 0; temp < num_ports; temp++) {
2329			retval = ftdi_write_pcimem(ftdi,
2330						   roothub.portstatus[temp], RH_PS_LSDA);
2331			if (retval)
2332				return retval;
2333		}
2334	}
2335	retval = ftdi_read_pcimem(ftdi, control, &control);
2336	if (retval)
2337		return retval;
2338retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2339	if (retval)
2340		return retval;
2341	retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR);
2342	if (retval)
2343		return retval;
2344extra:{
2345		retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2346		if (retval)
2347			return retval;
2348		if (0 != (status & OHCI_HCR)) {
2349			if (--reset_timeout == 0) {
2350				dev_err(&ftdi->udev->dev, "USB HC reset timed out!\n");
2351				return -ENODEV;
2352			} else {
2353				msleep(5);
2354				goto extra;
2355			}
2356		}
2357	}
2358	if (quirk & OHCI_QUIRK_INITRESET) {
2359		retval = ftdi_write_pcimem(ftdi, control, hc_control);
2360		if (retval)
2361			return retval;
2362		retval = ftdi_read_pcimem(ftdi, control, &control);
2363		if (retval)
2364			return retval;
2365	}
2366	retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000);
2367	if (retval)
2368		return retval;
2369	retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000);
2370	if (retval)
2371		return retval;
2372	retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000);
2373	if (retval)
2374		return retval;
2375	retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2376	if (retval)
2377		return retval;
2378	retval = ftdi_write_pcimem(ftdi, fminterval,
2379				   ((fminterval & FIT) ^ FIT) | hc_fminterval);
2380	if (retval)
2381		return retval;
2382	retval = ftdi_write_pcimem(ftdi, periodicstart,
2383				   ((9 *hc_fminterval) / 10) & 0x3fff);
2384	if (retval)
2385		return retval;
2386	retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2387	if (retval)
2388		return retval;
2389	retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart);
2390	if (retval)
2391		return retval;
2392	if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) {
2393		if (!(quirk & OHCI_QUIRK_INITRESET)) {
2394			quirk |= OHCI_QUIRK_INITRESET;
2395			goto retry;
2396		} else
2397			dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n",
2398				fminterval, periodicstart);
2399	}                        /* start controller operations */
2400	hc_control &= OHCI_CTRL_RWC;
2401	hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER;
2402	retval = ftdi_write_pcimem(ftdi, control, hc_control);
2403	if (retval)
2404		return retval;
2405	retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF);
2406	if (retval)
2407		return retval;
2408	retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus);
2409	if (retval)
2410		return retval;
2411	retval = ftdi_read_pcimem(ftdi, control, &control);
2412	if (retval)
2413		return retval;
2414	retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE);
2415	if (retval)
2416		return retval;
2417	retval = ftdi_write_pcimem(ftdi, intrstatus, mask);
2418	if (retval)
2419		return retval;
2420	retval = ftdi_write_pcimem(ftdi, intrdisable,
2421				   OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO |
2422				   OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH |
2423				   OHCI_INTR_SO);
2424	if (retval)
2425		return retval;        /* handle root hub init quirks ... */
2426	retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2427	if (retval)
2428		return retval;
2429	roothub_a &= ~(RH_A_PSM | RH_A_OCPM);
2430	if (quirk & OHCI_QUIRK_SUPERIO) {
2431		roothub_a |= RH_A_NOCP;
2432		roothub_a &= ~(RH_A_POTPGT | RH_A_NPS);
2433		retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2434		if (retval)
2435			return retval;
2436	} else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) {
2437		roothub_a |= RH_A_NPS;
2438		retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2439		if (retval)
2440			return retval;
2441	}
2442	retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC);
2443	if (retval)
2444		return retval;
2445	retval = ftdi_write_pcimem(ftdi, roothub.b,
2446				   (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM);
2447	if (retval)
2448		return retval;
2449	retval = ftdi_read_pcimem(ftdi, control, &control);
2450	if (retval)
2451		return retval;
2452	mdelay((roothub_a >> 23) & 0x1fe);
2453	for (temp = 0; temp < num_ports; temp++) {
2454		u32 portstatus;
2455		retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp],
2456					  &portstatus);
2457		if (retval)
2458			return retval;
2459		if (1 & portstatus)
2460			devices += 1;
2461	}
2462	return devices;
2463}
2464
2465static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn)
2466{
2467	u32 latence_timer;
2468	int UxxxStatus;
2469	u32 pcidata;
2470	int reg = 0;
2471	int activePCIfn = fn << 8;
2472	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2473	if (UxxxStatus)
2474		return UxxxStatus;
2475	reg = 16;
2476	UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2477					    0xFFFFFFFF);
2478	if (UxxxStatus)
2479		return UxxxStatus;
2480	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2481					   &pcidata);
2482	if (UxxxStatus)
2483		return UxxxStatus;
2484	UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2485					    0xF0000000);
2486	if (UxxxStatus)
2487		return UxxxStatus;
2488	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2489					   &pcidata);
2490	if (UxxxStatus)
2491		return UxxxStatus;
2492	reg = 12;
2493	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2494					   &latence_timer);
2495	if (UxxxStatus)
2496		return UxxxStatus;
2497	latence_timer &= 0xFFFF00FF;
2498	latence_timer |= 0x00001600;
2499	UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2500					    latence_timer);
2501	if (UxxxStatus)
2502		return UxxxStatus;
2503	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2504					   &pcidata);
2505	if (UxxxStatus)
2506		return UxxxStatus;
2507	reg = 4;
2508	UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2509					    0x06);
2510	if (UxxxStatus)
2511		return UxxxStatus;
2512	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2513					   &pcidata);
2514	if (UxxxStatus)
2515		return UxxxStatus;
2516	for (reg = 0; reg <= 0x54; reg += 4) {
2517		UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2518		if (UxxxStatus)
2519			return UxxxStatus;
2520	}
2521	return 0;
2522}
2523
2524static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn)
2525{
2526	u32 latence_timer;
2527	int UxxxStatus;
2528	u32 pcidata;
2529	int reg = 0;
2530	int activePCIfn = fn << 8;
2531	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2532	if (UxxxStatus)
2533		return UxxxStatus;
2534	reg = 16;
2535	UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2536					    0xFFFFFFFF);
2537	if (UxxxStatus)
2538		return UxxxStatus;
2539	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2540					   &pcidata);
2541	if (UxxxStatus)
2542		return UxxxStatus;
2543	UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2544					    0x00000000);
2545	if (UxxxStatus)
2546		return UxxxStatus;
2547	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2548					   &pcidata);
2549	if (UxxxStatus)
2550		return UxxxStatus;
2551	reg = 12;
2552	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2553					   &latence_timer);
2554	if (UxxxStatus)
2555		return UxxxStatus;
2556	latence_timer &= 0xFFFF00FF;
2557	latence_timer |= 0x00001600;
2558	UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2559					    latence_timer);
2560	if (UxxxStatus)
2561		return UxxxStatus;
2562	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2563					   &pcidata);
2564	if (UxxxStatus)
2565		return UxxxStatus;
2566	reg = 4;
2567	UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2568					    0x00);
2569	if (UxxxStatus)
2570		return UxxxStatus;
2571	return ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, &pcidata);
2572}
2573
2574static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk)
2575{
2576	int result;
2577	int UxxxStatus;
2578	UxxxStatus = ftdi_elan_setup_controller(ftdi, fn);
2579	if (UxxxStatus)
2580		return UxxxStatus;
2581	result = ftdi_elan_check_controller(ftdi, quirk);
2582	UxxxStatus = ftdi_elan_close_controller(ftdi, fn);
2583	if (UxxxStatus)
2584		return UxxxStatus;
2585	return result;
2586}
2587
2588static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2589{
2590	u32 controlreg;
2591	u8 sensebits;
2592	int UxxxStatus;
2593	UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2594	if (UxxxStatus)
2595		return UxxxStatus;
2596	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2597	if (UxxxStatus)
2598		return UxxxStatus;
2599	msleep(750);
2600	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2601	if (UxxxStatus)
2602		return UxxxStatus;
2603	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2604	if (UxxxStatus)
2605		return UxxxStatus;
2606	UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2607	if (UxxxStatus)
2608		return UxxxStatus;
2609	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2610	if (UxxxStatus)
2611		return UxxxStatus;
2612	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2613	if (UxxxStatus)
2614		return UxxxStatus;
2615	msleep(250);
2616	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2617	if (UxxxStatus)
2618		return UxxxStatus;
2619	UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2620	if (UxxxStatus)
2621		return UxxxStatus;
2622	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2623	if (UxxxStatus)
2624		return UxxxStatus;
2625	UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2626	if (UxxxStatus)
2627		return UxxxStatus;
2628	UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2629	if (UxxxStatus)
2630		return UxxxStatus;
2631	msleep(1000);
2632	sensebits = (controlreg >> 16) & 0x000F;
2633	if (0x0D == sensebits)
2634		return 0;
2635	else
2636		return - ENXIO;
2637}
2638
2639static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2640{
2641	int UxxxStatus;
2642	u32 pcidata;
2643	int reg = 0;
2644	u8 fn;
2645	int activePCIfn = 0;
2646	int max_devices = 0;
2647	int controllers = 0;
2648	int unrecognized = 0;
2649	ftdi->function = 0;
2650	for (fn = 0; (fn < 4); fn++) {
2651		u32 pciVID = 0;
2652		u32 pciPID = 0;
2653		int devices = 0;
2654		activePCIfn = fn << 8;
2655		UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2656						   &pcidata);
2657		if (UxxxStatus)
2658			return UxxxStatus;
2659		pciVID = pcidata & 0xFFFF;
2660		pciPID = (pcidata >> 16) & 0xFFFF;
2661		if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) {
2662			devices = ftdi_elan_found_controller(ftdi, fn, 0);
2663			controllers += 1;
2664		} else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035))
2665		{
2666			devices = ftdi_elan_found_controller(ftdi, fn, 0);
2667			controllers += 1;
2668		} else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) {
2669			devices = ftdi_elan_found_controller(ftdi, fn, 0);
2670			controllers += 1;
2671		} else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802))
2672		{
2673			devices = ftdi_elan_found_controller(ftdi, fn, 0);
2674			controllers += 1;
2675		} else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) {
2676			devices = ftdi_elan_found_controller(ftdi, fn,
2677							     OHCI_QUIRK_AMD756);
2678			controllers += 1;
2679		} else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) {
2680			devices = ftdi_elan_found_controller(ftdi, fn,
2681							     OHCI_QUIRK_ZFMICRO);
2682			controllers += 1;
2683		} else if (0 == pcidata) {
2684		} else
2685			unrecognized += 1;
2686		if (devices > max_devices) {
2687			max_devices = devices;
2688			ftdi->function = fn + 1;
2689			ftdi->platform_data.vendor = pciVID;
2690			ftdi->platform_data.device = pciPID;
2691		}
2692	}
2693	if (ftdi->function > 0) {
2694		return ftdi_elan_setup_controller(ftdi,	ftdi->function - 1);
2695	} else if (controllers > 0) {
2696		return -ENXIO;
2697	} else if (unrecognized > 0) {
2698		return -ENXIO;
2699	} else {
2700		ftdi->enumerated = 0;
2701		return -ENXIO;
2702	}
2703}
2704
2705
2706/*
2707 * we use only the first bulk-in and bulk-out endpoints
2708 */
2709static int ftdi_elan_probe(struct usb_interface *interface,
2710			   const struct usb_device_id *id)
2711{
2712	struct usb_host_interface *iface_desc;
2713	struct usb_endpoint_descriptor *endpoint;
2714	size_t buffer_size;
2715	int i;
2716	int retval = -ENOMEM;
2717	struct usb_ftdi *ftdi;
2718
2719	ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2720	if (!ftdi)
2721		return -ENOMEM;
2722
2723	mutex_lock(&ftdi_module_lock);
2724	list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2725	ftdi->sequence_num = ++ftdi_instances;
2726	mutex_unlock(&ftdi_module_lock);
2727	ftdi_elan_init_kref(ftdi);
2728	sema_init(&ftdi->sw_lock, 1);
2729	ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2730	ftdi->interface = interface;
2731	mutex_init(&ftdi->u132_lock);
2732	ftdi->expected = 4;
2733	iface_desc = interface->cur_altsetting;
2734	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2735		endpoint = &iface_desc->endpoint[i].desc;
2736		if (!ftdi->bulk_in_endpointAddr &&
2737		    usb_endpoint_is_bulk_in(endpoint)) {
2738			buffer_size = usb_endpoint_maxp(endpoint);
2739			ftdi->bulk_in_size = buffer_size;
2740			ftdi->bulk_in_endpointAddr = endpoint->bEndpointAddress;
2741			ftdi->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2742			if (!ftdi->bulk_in_buffer) {
2743				dev_err(&ftdi->udev->dev, "Could not allocate bulk_in_buffer\n");
2744				retval = -ENOMEM;
2745				goto error;
2746			}
2747		}
2748		if (!ftdi->bulk_out_endpointAddr &&
2749		    usb_endpoint_is_bulk_out(endpoint)) {
2750			ftdi->bulk_out_endpointAddr =
2751				endpoint->bEndpointAddress;
2752		}
2753	}
2754	if (!(ftdi->bulk_in_endpointAddr && ftdi->bulk_out_endpointAddr)) {
2755		dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk-out endpoints\n");
2756		retval = -ENODEV;
2757		goto error;
2758	}
2759	dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2760		 iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2761		 ftdi->bulk_out_endpointAddr);
2762	usb_set_intfdata(interface, ftdi);
2763	if (iface_desc->desc.bInterfaceNumber == 0 &&
2764	    ftdi->bulk_in_endpointAddr == 0x81 &&
2765	    ftdi->bulk_out_endpointAddr == 0x02) {
2766		retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2767		if (retval) {
2768			dev_err(&ftdi->udev->dev, "Not able to get a minor for this device\n");
2769			usb_set_intfdata(interface, NULL);
2770			retval = -ENOMEM;
2771			goto error;
2772		} else {
2773			ftdi->class = &ftdi_elan_jtag_class;
2774			dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface %d now attached to ftdi%d\n",
2775				 ftdi, iface_desc->desc.bInterfaceNumber,
2776				 interface->minor);
2777			return 0;
2778		}
2779	} else if (iface_desc->desc.bInterfaceNumber == 1 &&
2780		   ftdi->bulk_in_endpointAddr == 0x83 &&
2781		   ftdi->bulk_out_endpointAddr == 0x04) {
2782		ftdi->class = NULL;
2783		dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now activated\n",
2784			 ftdi, iface_desc->desc.bInterfaceNumber);
2785		INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2786		INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2787		INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2788		ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2789		return 0;
2790	} else {
2791		dev_err(&ftdi->udev->dev,
2792			"Could not find ELAN's U132 device\n");
2793		retval = -ENODEV;
2794		goto error;
2795	}
2796error:if (ftdi) {
2797		ftdi_elan_put_kref(ftdi);
2798	}
2799	return retval;
2800}
2801
2802static void ftdi_elan_disconnect(struct usb_interface *interface)
2803{
2804	struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2805	ftdi->disconnected += 1;
2806	if (ftdi->class) {
2807		int minor = interface->minor;
2808		struct usb_class_driver *class = ftdi->class;
2809		usb_set_intfdata(interface, NULL);
2810		usb_deregister_dev(interface, class);
2811		dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on minor %d now disconnected\n",
2812			 minor);
2813	} else {
2814		ftdi_status_cancel_work(ftdi);
2815		ftdi_command_cancel_work(ftdi);
2816		ftdi_response_cancel_work(ftdi);
2817		ftdi_elan_abandon_completions(ftdi);
2818		ftdi_elan_abandon_targets(ftdi);
2819		if (ftdi->registered) {
2820			platform_device_unregister(&ftdi->platform_dev);
2821			ftdi->synchronized = 0;
2822			ftdi->enumerated = 0;
2823			ftdi->initialized = 0;
2824			ftdi->registered = 0;
2825		}
2826		flush_workqueue(status_queue);
2827		flush_workqueue(command_queue);
2828		flush_workqueue(respond_queue);
2829		ftdi->disconnected += 1;
2830		usb_set_intfdata(interface, NULL);
2831		dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller interface now disconnected\n");
2832	}
2833	ftdi_elan_put_kref(ftdi);
2834}
2835
2836static struct usb_driver ftdi_elan_driver = {
2837	.name = "ftdi-elan",
2838	.probe = ftdi_elan_probe,
2839	.disconnect = ftdi_elan_disconnect,
2840	.id_table = ftdi_elan_table,
2841};
2842static int __init ftdi_elan_init(void)
2843{
2844	int result;
2845	pr_info("driver %s\n", ftdi_elan_driver.name);
2846	mutex_init(&ftdi_module_lock);
2847	INIT_LIST_HEAD(&ftdi_static_list);
2848	status_queue = create_singlethread_workqueue("ftdi-status-control");
2849	if (!status_queue)
2850		goto err_status_queue;
2851	command_queue = create_singlethread_workqueue("ftdi-command-engine");
2852	if (!command_queue)
2853		goto err_command_queue;
2854	respond_queue = create_singlethread_workqueue("ftdi-respond-engine");
2855	if (!respond_queue)
2856		goto err_respond_queue;
2857	result = usb_register(&ftdi_elan_driver);
2858	if (result) {
2859		destroy_workqueue(status_queue);
2860		destroy_workqueue(command_queue);
2861		destroy_workqueue(respond_queue);
2862		pr_err("usb_register failed. Error number %d\n", result);
2863	}
2864	return result;
2865
2866err_respond_queue:
2867	destroy_workqueue(command_queue);
2868err_command_queue:
2869	destroy_workqueue(status_queue);
2870err_status_queue:
2871	pr_err("%s couldn't create workqueue\n", ftdi_elan_driver.name);
2872	return -ENOMEM;
2873}
2874
2875static void __exit ftdi_elan_exit(void)
2876{
2877	struct usb_ftdi *ftdi;
2878	struct usb_ftdi *temp;
2879	usb_deregister(&ftdi_elan_driver);
2880	pr_info("ftdi_u132 driver deregistered\n");
2881	list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2882		ftdi_status_cancel_work(ftdi);
2883		ftdi_command_cancel_work(ftdi);
2884		ftdi_response_cancel_work(ftdi);
2885	} flush_workqueue(status_queue);
2886	destroy_workqueue(status_queue);
2887	status_queue = NULL;
2888	flush_workqueue(command_queue);
2889	destroy_workqueue(command_queue);
2890	command_queue = NULL;
2891	flush_workqueue(respond_queue);
2892	destroy_workqueue(respond_queue);
2893	respond_queue = NULL;
2894}
2895
2896
2897module_init(ftdi_elan_init);
2898module_exit(ftdi_elan_exit);