1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * USB FTDI client driver for Elan Digital Systems's Uxxx adapters
   4 *
   5 * Copyright(C) 2006 Elan Digital Systems Limited
   6 * http://www.elandigitalsystems.com
   7 *
   8 * Author and Maintainer - Tony Olech - Elan Digital Systems
   9 * tony.olech@elandigitalsystems.com
  10 *
  11 * This driver was written by Tony Olech(tony.olech@elandigitalsystems.com)
  12 * based on various USB client drivers in the 2.6.15 linux kernel
  13 * with constant reference to the 3rd Edition of Linux Device Drivers
  14 * published by O'Reilly
  15 *
  16 * The U132 adapter is a USB to CardBus adapter specifically designed
  17 * for PC cards that contain an OHCI host controller. Typical PC cards
  18 * are the Orange Mobile 3G Option GlobeTrotter Fusion card.
  19 *
  20 * The U132 adapter will *NOT *work with PC cards that do not contain
  21 * an OHCI controller. A simple way to test whether a PC card has an
  22 * OHCI controller as an interface is to insert the PC card directly
  23 * into a laptop(or desktop) with a CardBus slot and if "lspci" shows
  24 * a new USB controller and "lsusb -v" shows a new OHCI Host Controller
  25 * then there is a good chance that the U132 adapter will support the
  26 * PC card.(you also need the specific client driver for the PC card)
  27 *
  28 * Please inform the Author and Maintainer about any PC cards that
  29 * contain OHCI Host Controller and work when directly connected to
  30 * an embedded CardBus slot but do not work when they are connected
  31 * via an ELAN U132 adapter.
  32 *
  33 */
  34
  35#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  36
  37#include <linux/kernel.h>
  38#include <linux/errno.h>
  39#include <linux/init.h>
  40#include <linux/list.h>
  41#include <linux/ioctl.h>
  42#include <linux/pci_ids.h>
  43#include <linux/slab.h>
  44#include <linux/module.h>
  45#include <linux/kref.h>
  46#include <linux/mutex.h>
  47#include <linux/uaccess.h>
  48#include <linux/usb.h>
  49#include <linux/workqueue.h>
  50#include <linux/platform_device.h>
  51MODULE_AUTHOR("Tony Olech");
  52MODULE_DESCRIPTION("FTDI ELAN driver");
  53MODULE_LICENSE("GPL");
  54#define INT_MODULE_PARM(n, v) static int n = v;module_param(n, int, 0444)
  55static bool distrust_firmware = 1;
  56module_param(distrust_firmware, bool, 0);
  57MODULE_PARM_DESC(distrust_firmware,
  58		 "true to distrust firmware power/overcurrent setup");
  59extern struct platform_driver u132_platform_driver;
  60/*
  61 * ftdi_module_lock exists to protect access to global variables
  62 *
  63 */
  64static struct mutex ftdi_module_lock;
  65static int ftdi_instances = 0;
  66static struct list_head ftdi_static_list;
  67/*
  68 * end of the global variables protected by ftdi_module_lock
  69 */
  70#include "usb_u132.h"
  71#include <asm/io.h>
  72#include <linux/usb/hcd.h>
  73
  74/* FIXME ohci.h is ONLY for internal use by the OHCI driver.
  75 * If you're going to try stuff like this, you need to split
  76 * out shareable stuff (register declarations?) into its own
  77 * file, maybe name <linux/usb/ohci.h>
  78 */
  79
  80#include "../host/ohci.h"
  81/* Define these values to match your devices*/
  82#define USB_FTDI_ELAN_VENDOR_ID 0x0403
  83#define USB_FTDI_ELAN_PRODUCT_ID 0xd6ea
  84/* table of devices that work with this driver*/
  85static const struct usb_device_id ftdi_elan_table[] = {
  86	{USB_DEVICE(USB_FTDI_ELAN_VENDOR_ID, USB_FTDI_ELAN_PRODUCT_ID)},
  87	{ /* Terminating entry */ }
  88};
  89
  90MODULE_DEVICE_TABLE(usb, ftdi_elan_table);
  91/* only the jtag(firmware upgrade device) interface requires
  92 * a device file and corresponding minor number, but the
  93 * interface is created unconditionally - I suppose it could
  94 * be configured or not according to a module parameter.
  95 * But since we(now) require one interface per device,
  96 * and since it unlikely that a normal installation would
  97 * require more than a couple of elan-ftdi devices, 8 seems
  98 * like a reasonable limit to have here, and if someone
  99 * really requires more than 8 devices, then they can frig the
 100 * code and recompile
 101 */
 102#define USB_FTDI_ELAN_MINOR_BASE 192
 103#define COMMAND_BITS 5
 104#define COMMAND_SIZE (1<<COMMAND_BITS)
 105#define COMMAND_MASK (COMMAND_SIZE-1)
 106struct u132_command {
 107	u8 header;
 108	u16 length;
 109	u8 address;
 110	u8 width;
 111	u32 value;
 112	int follows;
 113	void *buffer;
 114};
 115#define RESPOND_BITS 5
 116#define RESPOND_SIZE (1<<RESPOND_BITS)
 117#define RESPOND_MASK (RESPOND_SIZE-1)
 118struct u132_respond {
 119	u8 header;
 120	u8 address;
 121	u32 *value;
 122	int *result;
 123	struct completion wait_completion;
 124};
 125struct u132_target {
 126	void *endp;
 127	struct urb *urb;
 128	int toggle_bits;
 129	int error_count;
 130	int condition_code;
 131	int repeat_number;
 132	int halted;
 133	int skipped;
 134	int actual;
 135	int non_null;
 136	int active;
 137	int abandoning;
 138	void (*callback)(void *endp, struct urb *urb, u8 *buf, int len,
 139			 int toggle_bits, int error_count, int condition_code,
 140			 int repeat_number, int halted, int skipped, int actual,
 141			 int non_null);
 142};
 143/* Structure to hold all of our device specific stuff*/
 144struct usb_ftdi {
 145	struct list_head ftdi_list;
 146	struct mutex u132_lock;
 147	int command_next;
 148	int command_head;
 149	struct u132_command command[COMMAND_SIZE];
 150	int respond_next;
 151	int respond_head;
 152	struct u132_respond respond[RESPOND_SIZE];
 153	struct u132_target target[4];
 154	char device_name[16];
 155	unsigned synchronized:1;
 156	unsigned enumerated:1;
 157	unsigned registered:1;
 158	unsigned initialized:1;
 159	unsigned card_ejected:1;
 160	int function;
 161	int sequence_num;
 162	int disconnected;
 163	int gone_away;
 164	int stuck_status;
 165	int status_queue_delay;
 166	struct semaphore sw_lock;
 167	struct usb_device *udev;
 168	struct usb_interface *interface;
 169	struct usb_class_driver *class;
 170	struct delayed_work status_work;
 171	struct delayed_work command_work;
 172	struct delayed_work respond_work;
 173	struct u132_platform_data platform_data;
 174	struct resource resources[0];
 175	struct platform_device platform_dev;
 176	unsigned char *bulk_in_buffer;
 177	size_t bulk_in_size;
 178	size_t bulk_in_last;
 179	size_t bulk_in_left;
 180	__u8 bulk_in_endpointAddr;
 181	__u8 bulk_out_endpointAddr;
 182	struct kref kref;
 183	u32 controlreg;
 184	u8 response[4 + 1024];
 185	int expected;
 186	int received;
 187	int ed_found;
 188};
 189#define kref_to_usb_ftdi(d) container_of(d, struct usb_ftdi, kref)
 190#define platform_device_to_usb_ftdi(d) container_of(d, struct usb_ftdi, \
 191						    platform_dev)
 192static struct usb_driver ftdi_elan_driver;
 193static void ftdi_elan_delete(struct kref *kref)
 194{
 195	struct usb_ftdi *ftdi = kref_to_usb_ftdi(kref);
 196	dev_warn(&ftdi->udev->dev, "FREEING ftdi=%p\n", ftdi);
 197	usb_put_dev(ftdi->udev);
 198	ftdi->disconnected += 1;
 199	mutex_lock(&ftdi_module_lock);
 200	list_del_init(&ftdi->ftdi_list);
 201	ftdi_instances -= 1;
 202	mutex_unlock(&ftdi_module_lock);
 203	kfree(ftdi->bulk_in_buffer);
 204	ftdi->bulk_in_buffer = NULL;
 205}
 206
 207static void ftdi_elan_put_kref(struct usb_ftdi *ftdi)
 208{
 209	kref_put(&ftdi->kref, ftdi_elan_delete);
 210}
 211
 212static void ftdi_elan_get_kref(struct usb_ftdi *ftdi)
 213{
 214	kref_get(&ftdi->kref);
 215}
 216
 217static void ftdi_elan_init_kref(struct usb_ftdi *ftdi)
 218{
 219	kref_init(&ftdi->kref);
 220}
 221
 222static void ftdi_status_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
 223{
 224	if (!schedule_delayed_work(&ftdi->status_work, delta))
 225		kref_put(&ftdi->kref, ftdi_elan_delete);
 226}
 227
 228static void ftdi_status_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 229{
 230	if (schedule_delayed_work(&ftdi->status_work, delta))
 231		kref_get(&ftdi->kref);
 232}
 233
 234static void ftdi_status_cancel_work(struct usb_ftdi *ftdi)
 235{
 236	if (cancel_delayed_work_sync(&ftdi->status_work))
 237		kref_put(&ftdi->kref, ftdi_elan_delete);
 238}
 239
 240static void ftdi_command_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
 241{
 242	if (!schedule_delayed_work(&ftdi->command_work, delta))
 243		kref_put(&ftdi->kref, ftdi_elan_delete);
 244}
 245
 246static void ftdi_command_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 247{
 248	if (schedule_delayed_work(&ftdi->command_work, delta))
 249		kref_get(&ftdi->kref);
 250}
 251
 252static void ftdi_command_cancel_work(struct usb_ftdi *ftdi)
 253{
 254	if (cancel_delayed_work_sync(&ftdi->command_work))
 255		kref_put(&ftdi->kref, ftdi_elan_delete);
 256}
 257
 258static void ftdi_response_requeue_work(struct usb_ftdi *ftdi,
 259				       unsigned int delta)
 260{
 261	if (!schedule_delayed_work(&ftdi->respond_work, delta))
 262		kref_put(&ftdi->kref, ftdi_elan_delete);
 263}
 264
 265static void ftdi_respond_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 266{
 267	if (schedule_delayed_work(&ftdi->respond_work, delta))
 268		kref_get(&ftdi->kref);
 269}
 270
 271static void ftdi_response_cancel_work(struct usb_ftdi *ftdi)
 272{
 273	if (cancel_delayed_work_sync(&ftdi->respond_work))
 274		kref_put(&ftdi->kref, ftdi_elan_delete);
 275}
 276
 277void ftdi_elan_gone_away(struct platform_device *pdev)
 278{
 279	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
 280	ftdi->gone_away += 1;
 281	ftdi_elan_put_kref(ftdi);
 282}
 283
 284
 285EXPORT_SYMBOL_GPL(ftdi_elan_gone_away);
 286static void ftdi_release_platform_dev(struct device *dev)
 287{
 288	dev->parent = NULL;
 289}
 290
 291static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
 292				  struct u132_target *target, u8 *buffer, int length);
 293static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi);
 294static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi);
 295static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi);
 296static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi);
 297static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi);
 298static int ftdi_elan_synchronize(struct usb_ftdi *ftdi);
 299static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi);
 300static int ftdi_elan_command_engine(struct usb_ftdi *ftdi);
 301static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi);
 302static int ftdi_elan_hcd_init(struct usb_ftdi *ftdi)
 303{
 304	if (ftdi->platform_dev.dev.parent)
 305		return -EBUSY;
 306
 307	ftdi_elan_get_kref(ftdi);
 308	ftdi->platform_data.potpg = 100;
 309	ftdi->platform_data.reset = NULL;
 310	ftdi->platform_dev.id = ftdi->sequence_num;
 311	ftdi->platform_dev.resource = ftdi->resources;
 312	ftdi->platform_dev.num_resources = ARRAY_SIZE(ftdi->resources);
 313	ftdi->platform_dev.dev.platform_data = &ftdi->platform_data;
 314	ftdi->platform_dev.dev.parent = NULL;
 315	ftdi->platform_dev.dev.release = ftdi_release_platform_dev;
 316	ftdi->platform_dev.dev.dma_mask = NULL;
 317	snprintf(ftdi->device_name, sizeof(ftdi->device_name), "u132_hcd");
 318	ftdi->platform_dev.name = ftdi->device_name;
 319	dev_info(&ftdi->udev->dev, "requesting module '%s'\n", "u132_hcd");
 320	request_module("u132_hcd");
 321	dev_info(&ftdi->udev->dev, "registering '%s'\n",
 322		 ftdi->platform_dev.name);
 323
 324	return platform_device_register(&ftdi->platform_dev);
 325}
 326
 327static void ftdi_elan_abandon_completions(struct usb_ftdi *ftdi)
 328{
 329	mutex_lock(&ftdi->u132_lock);
 330	while (ftdi->respond_next > ftdi->respond_head) {
 331		struct u132_respond *respond = &ftdi->respond[RESPOND_MASK &
 332							      ftdi->respond_head++];
 333		*respond->result = -ESHUTDOWN;
 334		*respond->value = 0;
 335		complete(&respond->wait_completion);
 336	} mutex_unlock(&ftdi->u132_lock);
 337}
 338
 339static void ftdi_elan_abandon_targets(struct usb_ftdi *ftdi)
 340{
 341	int ed_number = 4;
 342	mutex_lock(&ftdi->u132_lock);
 343	while (ed_number-- > 0) {
 344		struct u132_target *target = &ftdi->target[ed_number];
 345		if (target->active == 1) {
 346			target->condition_code = TD_DEVNOTRESP;
 347			mutex_unlock(&ftdi->u132_lock);
 348			ftdi_elan_do_callback(ftdi, target, NULL, 0);
 349			mutex_lock(&ftdi->u132_lock);
 350		}
 351	}
 352	ftdi->received = 0;
 353	ftdi->expected = 4;
 354	ftdi->ed_found = 0;
 355	mutex_unlock(&ftdi->u132_lock);
 356}
 357
 358static void ftdi_elan_flush_targets(struct usb_ftdi *ftdi)
 359{
 360	int ed_number = 4;
 361	mutex_lock(&ftdi->u132_lock);
 362	while (ed_number-- > 0) {
 363		struct u132_target *target = &ftdi->target[ed_number];
 364		target->abandoning = 1;
 365	wait_1:if (target->active == 1) {
 366			int command_size = ftdi->command_next -
 367				ftdi->command_head;
 368			if (command_size < COMMAND_SIZE) {
 369				struct u132_command *command = &ftdi->command[
 370					COMMAND_MASK & ftdi->command_next];
 371				command->header = 0x80 | (ed_number << 5) | 0x4;
 372				command->length = 0x00;
 373				command->address = 0x00;
 374				command->width = 0x00;
 375				command->follows = 0;
 376				command->value = 0;
 377				command->buffer = &command->value;
 378				ftdi->command_next += 1;
 379				ftdi_elan_kick_command_queue(ftdi);
 380			} else {
 381				mutex_unlock(&ftdi->u132_lock);
 382				msleep(100);
 383				mutex_lock(&ftdi->u132_lock);
 384				goto wait_1;
 385			}
 386		}
 387	wait_2:if (target->active == 1) {
 388			int command_size = ftdi->command_next -
 389				ftdi->command_head;
 390			if (command_size < COMMAND_SIZE) {
 391				struct u132_command *command = &ftdi->command[
 392					COMMAND_MASK & ftdi->command_next];
 393				command->header = 0x90 | (ed_number << 5);
 394				command->length = 0x00;
 395				command->address = 0x00;
 396				command->width = 0x00;
 397				command->follows = 0;
 398				command->value = 0;
 399				command->buffer = &command->value;
 400				ftdi->command_next += 1;
 401				ftdi_elan_kick_command_queue(ftdi);
 402			} else {
 403				mutex_unlock(&ftdi->u132_lock);
 404				msleep(100);
 405				mutex_lock(&ftdi->u132_lock);
 406				goto wait_2;
 407			}
 408		}
 409	}
 410	ftdi->received = 0;
 411	ftdi->expected = 4;
 412	ftdi->ed_found = 0;
 413	mutex_unlock(&ftdi->u132_lock);
 414}
 415
 416static void ftdi_elan_cancel_targets(struct usb_ftdi *ftdi)
 417{
 418	int ed_number = 4;
 419	mutex_lock(&ftdi->u132_lock);
 420	while (ed_number-- > 0) {
 421		struct u132_target *target = &ftdi->target[ed_number];
 422		target->abandoning = 1;
 423	wait:if (target->active == 1) {
 424			int command_size = ftdi->command_next -
 425				ftdi->command_head;
 426			if (command_size < COMMAND_SIZE) {
 427				struct u132_command *command = &ftdi->command[
 428					COMMAND_MASK & ftdi->command_next];
 429				command->header = 0x80 | (ed_number << 5) | 0x4;
 430				command->length = 0x00;
 431				command->address = 0x00;
 432				command->width = 0x00;
 433				command->follows = 0;
 434				command->value = 0;
 435				command->buffer = &command->value;
 436				ftdi->command_next += 1;
 437				ftdi_elan_kick_command_queue(ftdi);
 438			} else {
 439				mutex_unlock(&ftdi->u132_lock);
 440				msleep(100);
 441				mutex_lock(&ftdi->u132_lock);
 442				goto wait;
 443			}
 444		}
 445	}
 446	ftdi->received = 0;
 447	ftdi->expected = 4;
 448	ftdi->ed_found = 0;
 449	mutex_unlock(&ftdi->u132_lock);
 450}
 451
 452static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi)
 453{
 454	ftdi_command_queue_work(ftdi, 0);
 455}
 456
 457static void ftdi_elan_command_work(struct work_struct *work)
 458{
 459	struct usb_ftdi *ftdi =
 460		container_of(work, struct usb_ftdi, command_work.work);
 461
 462	if (ftdi->disconnected > 0) {
 463		ftdi_elan_put_kref(ftdi);
 464		return;
 465	} else {
 466		int retval = ftdi_elan_command_engine(ftdi);
 467		if (retval == -ESHUTDOWN) {
 468			ftdi->disconnected += 1;
 469		} else if (retval == -ENODEV) {
 470			ftdi->disconnected += 1;
 471		} else if (retval)
 472			dev_err(&ftdi->udev->dev, "command error %d\n", retval);
 473		ftdi_command_requeue_work(ftdi, msecs_to_jiffies(10));
 474		return;
 475	}
 476}
 477
 478static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi)
 479{
 480	ftdi_respond_queue_work(ftdi, 0);
 481}
 482
 483static void ftdi_elan_respond_work(struct work_struct *work)
 484{
 485	struct usb_ftdi *ftdi =
 486		container_of(work, struct usb_ftdi, respond_work.work);
 487	if (ftdi->disconnected > 0) {
 488		ftdi_elan_put_kref(ftdi);
 489		return;
 490	} else {
 491		int retval = ftdi_elan_respond_engine(ftdi);
 492		if (retval == 0) {
 493		} else if (retval == -ESHUTDOWN) {
 494			ftdi->disconnected += 1;
 495		} else if (retval == -ENODEV) {
 496			ftdi->disconnected += 1;
 497		} else if (retval == -EILSEQ) {
 498			ftdi->disconnected += 1;
 499		} else {
 500			ftdi->disconnected += 1;
 501			dev_err(&ftdi->udev->dev, "respond error %d\n", retval);
 502		}
 503		if (ftdi->disconnected > 0) {
 504			ftdi_elan_abandon_completions(ftdi);
 505			ftdi_elan_abandon_targets(ftdi);
 506		}
 507		ftdi_response_requeue_work(ftdi, msecs_to_jiffies(10));
 508		return;
 509	}
 510}
 511
 512
 513/*
 514 * the sw_lock is initially held and will be freed
 515 * after the FTDI has been synchronized
 516 *
 517 */
 518static void ftdi_elan_status_work(struct work_struct *work)
 519{
 520	struct usb_ftdi *ftdi =
 521		container_of(work, struct usb_ftdi, status_work.work);
 522	int work_delay_in_msec = 0;
 523	if (ftdi->disconnected > 0) {
 524		ftdi_elan_put_kref(ftdi);
 525		return;
 526	} else if (ftdi->synchronized == 0) {
 527		down(&ftdi->sw_lock);
 528		if (ftdi_elan_synchronize(ftdi) == 0) {
 529			ftdi->synchronized = 1;
 530			ftdi_command_queue_work(ftdi, 1);
 531			ftdi_respond_queue_work(ftdi, 1);
 532			up(&ftdi->sw_lock);
 533			work_delay_in_msec = 100;
 534		} else {
 535			dev_err(&ftdi->udev->dev, "synchronize failed\n");
 536			up(&ftdi->sw_lock);
 537			work_delay_in_msec = 10 *1000;
 538		}
 539	} else if (ftdi->stuck_status > 0) {
 540		if (ftdi_elan_stuck_waiting(ftdi) == 0) {
 541			ftdi->stuck_status = 0;
 542			ftdi->synchronized = 0;
 543		} else if ((ftdi->stuck_status++ % 60) == 1) {
 544			dev_err(&ftdi->udev->dev, "WRONG type of card inserted - please remove\n");
 545		} else
 546			dev_err(&ftdi->udev->dev, "WRONG type of card inserted - checked %d times\n",
 547				ftdi->stuck_status);
 548		work_delay_in_msec = 100;
 549	} else if (ftdi->enumerated == 0) {
 550		if (ftdi_elan_enumeratePCI(ftdi) == 0) {
 551			ftdi->enumerated = 1;
 552			work_delay_in_msec = 250;
 553		} else
 554			work_delay_in_msec = 1000;
 555	} else if (ftdi->initialized == 0) {
 556		if (ftdi_elan_setupOHCI(ftdi) == 0) {
 557			ftdi->initialized = 1;
 558			work_delay_in_msec = 500;
 559		} else {
 560			dev_err(&ftdi->udev->dev, "initialized failed - trying again in 10 seconds\n");
 561			work_delay_in_msec = 1 *1000;
 562		}
 563	} else if (ftdi->registered == 0) {
 564		work_delay_in_msec = 10;
 565		if (ftdi_elan_hcd_init(ftdi) == 0) {
 566			ftdi->registered = 1;
 567		} else
 568			dev_err(&ftdi->udev->dev, "register failed\n");
 569		work_delay_in_msec = 250;
 570	} else {
 571		if (ftdi_elan_checkingPCI(ftdi) == 0) {
 572			work_delay_in_msec = 250;
 573		} else if (ftdi->controlreg & 0x00400000) {
 574			if (ftdi->gone_away > 0) {
 575				dev_err(&ftdi->udev->dev, "PCI device eject confirmed platform_dev.dev.parent=%p platform_dev.dev=%p\n",
 576					ftdi->platform_dev.dev.parent,
 577					&ftdi->platform_dev.dev);
 578				platform_device_unregister(&ftdi->platform_dev);
 579				ftdi->platform_dev.dev.parent = NULL;
 580				ftdi->registered = 0;
 581				ftdi->enumerated = 0;
 582				ftdi->card_ejected = 0;
 583				ftdi->initialized = 0;
 584				ftdi->gone_away = 0;
 585			} else
 586				ftdi_elan_flush_targets(ftdi);
 587			work_delay_in_msec = 250;
 588		} else {
 589			dev_err(&ftdi->udev->dev, "PCI device has disappeared\n");
 590			ftdi_elan_cancel_targets(ftdi);
 591			work_delay_in_msec = 500;
 592			ftdi->enumerated = 0;
 593			ftdi->initialized = 0;
 594		}
 595	}
 596	if (ftdi->disconnected > 0) {
 597		ftdi_elan_put_kref(ftdi);
 598		return;
 599	} else {
 600		ftdi_status_requeue_work(ftdi,
 601					 msecs_to_jiffies(work_delay_in_msec));
 602		return;
 603	}
 604}
 605
 606
 607/*
 608 * file_operations for the jtag interface
 609 *
 610 * the usage count for the device is incremented on open()
 611 * and decremented on release()
 612 */
 613static int ftdi_elan_open(struct inode *inode, struct file *file)
 614{
 615	int subminor;
 616	struct usb_interface *interface;
 617
 618	subminor = iminor(inode);
 619	interface = usb_find_interface(&ftdi_elan_driver, subminor);
 620
 621	if (!interface) {
 622		pr_err("can't find device for minor %d\n", subminor);
 623		return -ENODEV;
 624	} else {
 625		struct usb_ftdi *ftdi = usb_get_intfdata(interface);
 626		if (!ftdi) {
 627			return -ENODEV;
 628		} else {
 629			if (down_interruptible(&ftdi->sw_lock)) {
 630				return -EINTR;
 631			} else {
 632				ftdi_elan_get_kref(ftdi);
 633				file->private_data = ftdi;
 634				return 0;
 635			}
 636		}
 637	}
 638}
 639
 640static int ftdi_elan_release(struct inode *inode, struct file *file)
 641{
 642	struct usb_ftdi *ftdi = file->private_data;
 643	if (ftdi == NULL)
 644		return -ENODEV;
 645	up(&ftdi->sw_lock);        /* decrement the count on our device */
 646	ftdi_elan_put_kref(ftdi);
 647	return 0;
 648}
 649
 650
 651/*
 652 *
 653 * blocking bulk reads are used to get data from the device
 654 *
 655 */
 656static ssize_t ftdi_elan_read(struct file *file, char __user *buffer,
 657			      size_t count, loff_t *ppos)
 658{
 659	char data[30 *3 + 4];
 660	char *d = data;
 661	int m = (sizeof(data) - 1) / 3 - 1;
 662	int bytes_read = 0;
 663	int retry_on_empty = 10;
 664	int retry_on_timeout = 5;
 665	struct usb_ftdi *ftdi = file->private_data;
 666	if (ftdi->disconnected > 0) {
 667		return -ENODEV;
 668	}
 669	data[0] = 0;
 670have:if (ftdi->bulk_in_left > 0) {
 671		if (count-- > 0) {
 672			char *p = ++ftdi->bulk_in_last + ftdi->bulk_in_buffer;
 673			ftdi->bulk_in_left -= 1;
 674			if (bytes_read < m) {
 675				d += sprintf(d, " %02X", 0x000000FF & *p);
 676			} else if (bytes_read > m) {
 677			} else
 678				d += sprintf(d, " ..");
 679			if (copy_to_user(buffer++, p, 1)) {
 680				return -EFAULT;
 681			} else {
 682				bytes_read += 1;
 683				goto have;
 684			}
 685		} else
 686			return bytes_read;
 687	}
 688more:if (count > 0) {
 689		int packet_bytes = 0;
 690		int retval = usb_bulk_msg(ftdi->udev,
 691					  usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 692					  ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 693					  &packet_bytes, 50);
 694		if (packet_bytes > 2) {
 695			ftdi->bulk_in_left = packet_bytes - 2;
 696			ftdi->bulk_in_last = 1;
 697			goto have;
 698		} else if (retval == -ETIMEDOUT) {
 699			if (retry_on_timeout-- > 0) {
 700				goto more;
 701			} else if (bytes_read > 0) {
 702				return bytes_read;
 703			} else
 704				return retval;
 705		} else if (retval == 0) {
 706			if (retry_on_empty-- > 0) {
 707				goto more;
 708			} else
 709				return bytes_read;
 710		} else
 711			return retval;
 712	} else
 713		return bytes_read;
 714}
 715
 716static void ftdi_elan_write_bulk_callback(struct urb *urb)
 717{
 718	struct usb_ftdi *ftdi = urb->context;
 719	int status = urb->status;
 720
 721	if (status && !(status == -ENOENT || status == -ECONNRESET ||
 722			status == -ESHUTDOWN)) {
 723		dev_err(&ftdi->udev->dev,
 724			"urb=%p write bulk status received: %d\n", urb, status);
 725	}
 726	usb_free_coherent(urb->dev, urb->transfer_buffer_length,
 727			  urb->transfer_buffer, urb->transfer_dma);
 728}
 729
 730static int fill_buffer_with_all_queued_commands(struct usb_ftdi *ftdi,
 731						char *buf, int command_size, int total_size)
 732{
 733	int ed_commands = 0;
 734	int b = 0;
 735	int I = command_size;
 736	int i = ftdi->command_head;
 737	while (I-- > 0) {
 738		struct u132_command *command = &ftdi->command[COMMAND_MASK &
 739							      i++];
 740		int F = command->follows;
 741		u8 *f = command->buffer;
 742		if (command->header & 0x80) {
 743			ed_commands |= 1 << (0x3 & (command->header >> 5));
 744		}
 745		buf[b++] = command->header;
 746		buf[b++] = (command->length >> 0) & 0x00FF;
 747		buf[b++] = (command->length >> 8) & 0x00FF;
 748		buf[b++] = command->address;
 749		buf[b++] = command->width;
 750		while (F-- > 0) {
 751			buf[b++] = *f++;
 752		}
 753	}
 754	return ed_commands;
 755}
 756
 757static int ftdi_elan_total_command_size(struct usb_ftdi *ftdi, int command_size)
 758{
 759	int total_size = 0;
 760	int I = command_size;
 761	int i = ftdi->command_head;
 762	while (I-- > 0) {
 763		struct u132_command *command = &ftdi->command[COMMAND_MASK &
 764							      i++];
 765		total_size += 5 + command->follows;
 766	} return total_size;
 767}
 768
 769static int ftdi_elan_command_engine(struct usb_ftdi *ftdi)
 770{
 771	int retval;
 772	char *buf;
 773	int ed_commands;
 774	int total_size;
 775	struct urb *urb;
 776	int command_size = ftdi->command_next - ftdi->command_head;
 777	if (command_size == 0)
 778		return 0;
 779	total_size = ftdi_elan_total_command_size(ftdi, command_size);
 780	urb = usb_alloc_urb(0, GFP_KERNEL);
 781	if (!urb)
 782		return -ENOMEM;
 783	buf = usb_alloc_coherent(ftdi->udev, total_size, GFP_KERNEL,
 784				 &urb->transfer_dma);
 785	if (!buf) {
 786		dev_err(&ftdi->udev->dev, "could not get a buffer to write %d commands totaling %d bytes to the Uxxx\n",
 787			command_size, total_size);
 788		usb_free_urb(urb);
 789		return -ENOMEM;
 790	}
 791	ed_commands = fill_buffer_with_all_queued_commands(ftdi, buf,
 792							   command_size, total_size);
 793	usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
 794							   ftdi->bulk_out_endpointAddr), buf, total_size,
 795			  ftdi_elan_write_bulk_callback, ftdi);
 796	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 797	if (ed_commands) {
 798		char diag[40 *3 + 4];
 799		char *d = diag;
 800		int m = total_size;
 801		u8 *c = buf;
 802		int s = (sizeof(diag) - 1) / 3;
 803		diag[0] = 0;
 804		while (s-- > 0 && m-- > 0) {
 805			if (s > 0 || m == 0) {
 806				d += sprintf(d, " %02X", *c++);
 807			} else
 808				d += sprintf(d, " ..");
 809		}
 810	}
 811	retval = usb_submit_urb(urb, GFP_KERNEL);
 812	if (retval) {
 813		dev_err(&ftdi->udev->dev, "failed %d to submit urb %p to write %d commands totaling %d bytes to the Uxxx\n",
 814			retval, urb, command_size, total_size);
 815		usb_free_coherent(ftdi->udev, total_size, buf, urb->transfer_dma);
 816		usb_free_urb(urb);
 817		return retval;
 818	}
 819	usb_free_urb(urb);        /* release our reference to this urb,
 820				     the USB core will eventually free it entirely */
 821	ftdi->command_head += command_size;
 822	ftdi_elan_kick_respond_queue(ftdi);
 823	return 0;
 824}
 825
 826static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
 827				  struct u132_target *target, u8 *buffer, int length)
 828{
 829	struct urb *urb = target->urb;
 830	int halted = target->halted;
 831	int skipped = target->skipped;
 832	int actual = target->actual;
 833	int non_null = target->non_null;
 834	int toggle_bits = target->toggle_bits;
 835	int error_count = target->error_count;
 836	int condition_code = target->condition_code;
 837	int repeat_number = target->repeat_number;
 838	void (*callback) (void *, struct urb *, u8 *, int, int, int, int, int,
 839			  int, int, int, int) = target->callback;
 840	target->active -= 1;
 841	target->callback = NULL;
 842	(*callback) (target->endp, urb, buffer, length, toggle_bits,
 843		     error_count, condition_code, repeat_number, halted, skipped,
 844		     actual, non_null);
 845}
 846
 847static char *have_ed_set_response(struct usb_ftdi *ftdi,
 848				  struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 849				  char *b)
 850{
 851	int payload = (ed_length >> 0) & 0x07FF;
 852	mutex_lock(&ftdi->u132_lock);
 853	target->actual = 0;
 854	target->non_null = (ed_length >> 15) & 0x0001;
 855	target->repeat_number = (ed_length >> 11) & 0x000F;
 856	if (ed_type == 0x02 || ed_type == 0x03) {
 857		if (payload == 0 || target->abandoning > 0) {
 858			target->abandoning = 0;
 859			mutex_unlock(&ftdi->u132_lock);
 860			ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 861					      payload);
 862			ftdi->received = 0;
 863			ftdi->expected = 4;
 864			ftdi->ed_found = 0;
 865			return ftdi->response;
 866		} else {
 867			ftdi->expected = 4 + payload;
 868			ftdi->ed_found = 1;
 869			mutex_unlock(&ftdi->u132_lock);
 870			return b;
 871		}
 872	} else {
 873		target->abandoning = 0;
 874		mutex_unlock(&ftdi->u132_lock);
 875		ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 876				      payload);
 877		ftdi->received = 0;
 878		ftdi->expected = 4;
 879		ftdi->ed_found = 0;
 880		return ftdi->response;
 881	}
 882}
 883
 884static char *have_ed_get_response(struct usb_ftdi *ftdi,
 885				  struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 886				  char *b)
 887{
 888	mutex_lock(&ftdi->u132_lock);
 889	target->condition_code = TD_DEVNOTRESP;
 890	target->actual = (ed_length >> 0) & 0x01FF;
 891	target->non_null = (ed_length >> 15) & 0x0001;
 892	target->repeat_number = (ed_length >> 11) & 0x000F;
 893	mutex_unlock(&ftdi->u132_lock);
 894	if (target->active)
 895		ftdi_elan_do_callback(ftdi, target, NULL, 0);
 896	target->abandoning = 0;
 897	ftdi->received = 0;
 898	ftdi->expected = 4;
 899	ftdi->ed_found = 0;
 900	return ftdi->response;
 901}
 902
 903
 904/*
 905 * The engine tries to empty the FTDI fifo
 906 *
 907 * all responses found in the fifo data are dispatched thus
 908 * the response buffer can only ever hold a maximum sized
 909 * response from the Uxxx.
 910 *
 911 */
 912static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi)
 913{
 914	u8 *b = ftdi->response + ftdi->received;
 915	int bytes_read = 0;
 916	int retry_on_empty = 1;
 917	int retry_on_timeout = 3;
 918	int empty_packets = 0;
 919read:{
 920		int packet_bytes = 0;
 921		int retval = usb_bulk_msg(ftdi->udev,
 922					  usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 923					  ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 924					  &packet_bytes, 500);
 925		char diag[30 *3 + 4];
 926		char *d = diag;
 927		int m = packet_bytes;
 928		u8 *c = ftdi->bulk_in_buffer;
 929		int s = (sizeof(diag) - 1) / 3;
 930		diag[0] = 0;
 931		while (s-- > 0 && m-- > 0) {
 932			if (s > 0 || m == 0) {
 933				d += sprintf(d, " %02X", *c++);
 934			} else
 935				d += sprintf(d, " ..");
 936		}
 937		if (packet_bytes > 2) {
 938			ftdi->bulk_in_left = packet_bytes - 2;
 939			ftdi->bulk_in_last = 1;
 940			goto have;
 941		} else if (retval == -ETIMEDOUT) {
 942			if (retry_on_timeout-- > 0) {
 943				dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
 944					packet_bytes, bytes_read, diag);
 945				goto more;
 946			} else if (bytes_read > 0) {
 947				dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n",
 948					bytes_read, diag);
 949				return -ENOMEM;
 950			} else {
 951				dev_err(&ftdi->udev->dev, "TIMED OUT with packet_bytes = %d with total %d bytes%s\n",
 952					packet_bytes, bytes_read, diag);
 953				return -ENOMEM;
 954			}
 955		} else if (retval == -EILSEQ) {
 956			dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
 957				retval, packet_bytes, bytes_read, diag);
 958			return retval;
 959		} else if (retval) {
 960			dev_err(&ftdi->udev->dev, "error = %d with packet_bytes = %d with total %d bytes%s\n",
 961				retval, packet_bytes, bytes_read, diag);
 962			return retval;
 963		} else if (packet_bytes == 2) {
 964			unsigned char s0 = ftdi->bulk_in_buffer[0];
 965			unsigned char s1 = ftdi->bulk_in_buffer[1];
 966			empty_packets += 1;
 967			if (s0 == 0x31 && s1 == 0x60) {
 968				if (retry_on_empty-- > 0) {
 969					goto more;
 970				} else
 971					return 0;
 972			} else if (s0 == 0x31 && s1 == 0x00) {
 973				if (retry_on_empty-- > 0) {
 974					goto more;
 975				} else
 976					return 0;
 977			} else {
 978				if (retry_on_empty-- > 0) {
 979					goto more;
 980				} else
 981					return 0;
 982			}
 983		} else if (packet_bytes == 1) {
 984			if (retry_on_empty-- > 0) {
 985				goto more;
 986			} else
 987				return 0;
 988		} else {
 989			if (retry_on_empty-- > 0) {
 990				goto more;
 991			} else
 992				return 0;
 993		}
 994	}
 995more:{
 996		goto read;
 997	}
 998have:if (ftdi->bulk_in_left > 0) {
 999		u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last];
1000		bytes_read += 1;
1001		ftdi->bulk_in_left -= 1;
1002		if (ftdi->received == 0 && c == 0xFF) {
1003			goto have;
1004		} else
1005			*b++ = c;
1006		if (++ftdi->received < ftdi->expected) {
1007			goto have;
1008		} else if (ftdi->ed_found) {
1009			int ed_number = (ftdi->response[0] >> 5) & 0x03;
1010			u16 ed_length = (ftdi->response[2] << 8) |
1011				ftdi->response[1];
1012			struct u132_target *target = &ftdi->target[ed_number];
1013			int payload = (ed_length >> 0) & 0x07FF;
1014			char diag[30 *3 + 4];
1015			char *d = diag;
1016			int m = payload;
1017			u8 *c = 4 + ftdi->response;
1018			int s = (sizeof(diag) - 1) / 3;
1019			diag[0] = 0;
1020			while (s-- > 0 && m-- > 0) {
1021				if (s > 0 || m == 0) {
1022					d += sprintf(d, " %02X", *c++);
1023				} else
1024					d += sprintf(d, " ..");
1025			}
1026			ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
1027					      payload);
1028			ftdi->received = 0;
1029			ftdi->expected = 4;
1030			ftdi->ed_found = 0;
1031			b = ftdi->response;
1032			goto have;
1033		} else if (ftdi->expected == 8) {
1034			u8 buscmd;
1035			int respond_head = ftdi->respond_head++;
1036			struct u132_respond *respond = &ftdi->respond[
1037				RESPOND_MASK & respond_head];
1038			u32 data = ftdi->response[7];
1039			data <<= 8;
1040			data |= ftdi->response[6];
1041			data <<= 8;
1042			data |= ftdi->response[5];
1043			data <<= 8;
1044			data |= ftdi->response[4];
1045			*respond->value = data;
1046			*respond->result = 0;
1047			complete(&respond->wait_completion);
1048			ftdi->received = 0;
1049			ftdi->expected = 4;
1050			ftdi->ed_found = 0;
1051			b = ftdi->response;
1052			buscmd = (ftdi->response[0] >> 0) & 0x0F;
1053			if (buscmd == 0x00) {
1054			} else if (buscmd == 0x02) {
1055			} else if (buscmd == 0x06) {
1056			} else if (buscmd == 0x0A) {
1057			} else
1058				dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) value = %08X\n",
1059					buscmd, data);
1060			goto have;
1061		} else {
1062			if ((ftdi->response[0] & 0x80) == 0x00) {
1063				ftdi->expected = 8;
1064				goto have;
1065			} else {
1066				int ed_number = (ftdi->response[0] >> 5) & 0x03;
1067				int ed_type = (ftdi->response[0] >> 0) & 0x03;
1068				u16 ed_length = (ftdi->response[2] << 8) |
1069					ftdi->response[1];
1070				struct u132_target *target = &ftdi->target[
1071					ed_number];
1072				target->halted = (ftdi->response[0] >> 3) &
1073					0x01;
1074				target->skipped = (ftdi->response[0] >> 2) &
1075					0x01;
1076				target->toggle_bits = (ftdi->response[3] >> 6)
1077					& 0x03;
1078				target->error_count = (ftdi->response[3] >> 4)
1079					& 0x03;
1080				target->condition_code = (ftdi->response[
1081								  3] >> 0) & 0x0F;
1082				if ((ftdi->response[0] & 0x10) == 0x00) {
1083					b = have_ed_set_response(ftdi, target,
1084								 ed_length, ed_number, ed_type,
1085								 b);
1086					goto have;
1087				} else {
1088					b = have_ed_get_response(ftdi, target,
1089								 ed_length, ed_number, ed_type,
1090								 b);
1091					goto have;
1092				}
1093			}
1094		}
1095	} else
1096		goto more;
1097}
1098
1099
1100/*
1101 * create a urb, and a buffer for it, and copy the data to the urb
1102 *
1103 */
1104static ssize_t ftdi_elan_write(struct file *file,
1105			       const char __user *user_buffer, size_t count,
1106			       loff_t *ppos)
1107{
1108	int retval = 0;
1109	struct urb *urb;
1110	char *buf;
1111	struct usb_ftdi *ftdi = file->private_data;
1112
1113	if (ftdi->disconnected > 0) {
1114		return -ENODEV;
1115	}
1116	if (count == 0) {
1117		goto exit;
1118	}
1119	urb = usb_alloc_urb(0, GFP_KERNEL);
1120	if (!urb) {
1121		retval = -ENOMEM;
1122		goto error_1;
1123	}
1124	buf = usb_alloc_coherent(ftdi->udev, count, GFP_KERNEL,
1125				 &urb->transfer_dma);
1126	if (!buf) {
1127		retval = -ENOMEM;
1128		goto error_2;
1129	}
1130	if (copy_from_user(buf, user_buffer, count)) {
1131		retval = -EFAULT;
1132		goto error_3;
1133	}
1134	usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1135							   ftdi->bulk_out_endpointAddr), buf, count,
1136			  ftdi_elan_write_bulk_callback, ftdi);
1137	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1138	retval = usb_submit_urb(urb, GFP_KERNEL);
1139	if (retval) {
1140		dev_err(&ftdi->udev->dev,
1141			"failed submitting write urb, error %d\n", retval);
1142		goto error_3;
1143	}
1144	usb_free_urb(urb);
1145
1146exit:
1147	return count;
1148error_3:
1149	usb_free_coherent(ftdi->udev, count, buf, urb->transfer_dma);
1150error_2:
1151	usb_free_urb(urb);
1152error_1:
1153	return retval;
1154}
1155
1156static const struct file_operations ftdi_elan_fops = {
1157	.owner = THIS_MODULE,
1158	.llseek = no_llseek,
1159	.read = ftdi_elan_read,
1160	.write = ftdi_elan_write,
1161	.open = ftdi_elan_open,
1162	.release = ftdi_elan_release,
1163};
1164
1165/*
1166 * usb class driver info in order to get a minor number from the usb core,
1167 * and to have the device registered with the driver core
1168 */
1169static struct usb_class_driver ftdi_elan_jtag_class = {
1170	.name = "ftdi-%d-jtag",
1171	.fops = &ftdi_elan_fops,
1172	.minor_base = USB_FTDI_ELAN_MINOR_BASE,
1173};
1174
1175/*
1176 * the following definitions are for the
1177 * ELAN FPGA state machgine processor that
1178 * lies on the other side of the FTDI chip
1179 */
1180#define cPCIu132rd 0x0
1181#define cPCIu132wr 0x1
1182#define cPCIiord 0x2
1183#define cPCIiowr 0x3
1184#define cPCImemrd 0x6
1185#define cPCImemwr 0x7
1186#define cPCIcfgrd 0xA
1187#define cPCIcfgwr 0xB
1188#define cPCInull 0xF
1189#define cU132cmd_status 0x0
1190#define cU132flash 0x1
1191#define cPIDsetup 0x0
1192#define cPIDout 0x1
1193#define cPIDin 0x2
1194#define cPIDinonce 0x3
1195#define cCCnoerror 0x0
1196#define cCCcrc 0x1
1197#define cCCbitstuff 0x2
1198#define cCCtoggle 0x3
1199#define cCCstall 0x4
1200#define cCCnoresp 0x5
1201#define cCCbadpid1 0x6
1202#define cCCbadpid2 0x7
1203#define cCCdataoverrun 0x8
1204#define cCCdataunderrun 0x9
1205#define cCCbuffoverrun 0xC
1206#define cCCbuffunderrun 0xD
1207#define cCCnotaccessed 0xF
1208static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1209{
1210wait:if (ftdi->disconnected > 0) {
1211		return -ENODEV;
1212	} else {
1213		int command_size;
1214		mutex_lock(&ftdi->u132_lock);
1215		command_size = ftdi->command_next - ftdi->command_head;
1216		if (command_size < COMMAND_SIZE) {
1217			struct u132_command *command = &ftdi->command[
1218				COMMAND_MASK & ftdi->command_next];
1219			command->header = 0x00 | cPCIu132wr;
1220			command->length = 0x04;
1221			command->address = 0x00;
1222			command->width = 0x00;
1223			command->follows = 4;
1224			command->value = data;
1225			command->buffer = &command->value;
1226			ftdi->command_next += 1;
1227			ftdi_elan_kick_command_queue(ftdi);
1228			mutex_unlock(&ftdi->u132_lock);
1229			return 0;
1230		} else {
1231			mutex_unlock(&ftdi->u132_lock);
1232			msleep(100);
1233			goto wait;
1234		}
1235	}
1236}
1237
1238static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1239				  u8 width, u32 data)
1240{
1241	u8 addressofs = config_offset / 4;
1242wait:if (ftdi->disconnected > 0) {
1243		return -ENODEV;
1244	} else {
1245		int command_size;
1246		mutex_lock(&ftdi->u132_lock);
1247		command_size = ftdi->command_next - ftdi->command_head;
1248		if (command_size < COMMAND_SIZE) {
1249			struct u132_command *command = &ftdi->command[
1250				COMMAND_MASK & ftdi->command_next];
1251			command->header = 0x00 | (cPCIcfgwr & 0x0F);
1252			command->length = 0x04;
1253			command->address = addressofs;
1254			command->width = 0x00 | (width & 0x0F);
1255			command->follows = 4;
1256			command->value = data;
1257			command->buffer = &command->value;
1258			ftdi->command_next += 1;
1259			ftdi_elan_kick_command_queue(ftdi);
1260			mutex_unlock(&ftdi->u132_lock);
1261			return 0;
1262		} else {
1263			mutex_unlock(&ftdi->u132_lock);
1264			msleep(100);
1265			goto wait;
1266		}
1267	}
1268}
1269
1270static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1271				  u8 width, u32 data)
1272{
1273	u8 addressofs = mem_offset / 4;
1274wait:if (ftdi->disconnected > 0) {
1275		return -ENODEV;
1276	} else {
1277		int command_size;
1278		mutex_lock(&ftdi->u132_lock);
1279		command_size = ftdi->command_next - ftdi->command_head;
1280		if (command_size < COMMAND_SIZE) {
1281			struct u132_command *command = &ftdi->command[
1282				COMMAND_MASK & ftdi->command_next];
1283			command->header = 0x00 | (cPCImemwr & 0x0F);
1284			command->length = 0x04;
1285			command->address = addressofs;
1286			command->width = 0x00 | (width & 0x0F);
1287			command->follows = 4;
1288			command->value = data;
1289			command->buffer = &command->value;
1290			ftdi->command_next += 1;
1291			ftdi_elan_kick_command_queue(ftdi);
1292			mutex_unlock(&ftdi->u132_lock);
1293			return 0;
1294		} else {
1295			mutex_unlock(&ftdi->u132_lock);
1296			msleep(100);
1297			goto wait;
1298		}
1299	}
1300}
1301
1302int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset,
1303			       u8 width, u32 data)
1304{
1305	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1306	return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data);
1307}
1308
1309
1310EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1311static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1312{
1313wait:if (ftdi->disconnected > 0) {
1314		return -ENODEV;
1315	} else {
1316		int command_size;
1317		int respond_size;
1318		mutex_lock(&ftdi->u132_lock);
1319		command_size = ftdi->command_next - ftdi->command_head;
1320		respond_size = ftdi->respond_next - ftdi->respond_head;
1321		if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1322		{
1323			struct u132_command *command = &ftdi->command[
1324				COMMAND_MASK & ftdi->command_next];
1325			struct u132_respond *respond = &ftdi->respond[
1326				RESPOND_MASK & ftdi->respond_next];
1327			int result = -ENODEV;
1328			respond->result = &result;
1329			respond->header = command->header = 0x00 | cPCIu132rd;
1330			command->length = 0x04;
1331			respond->address = command->address = cU132cmd_status;
1332			command->width = 0x00;
1333			command->follows = 0;
1334			command->value = 0;
1335			command->buffer = NULL;
1336			respond->value = data;
1337			init_completion(&respond->wait_completion);
1338			ftdi->command_next += 1;
1339			ftdi->respond_next += 1;
1340			ftdi_elan_kick_command_queue(ftdi);
1341			mutex_unlock(&ftdi->u132_lock);
1342			wait_for_completion(&respond->wait_completion);
1343			return result;
1344		} else {
1345			mutex_unlock(&ftdi->u132_lock);
1346			msleep(100);
1347			goto wait;
1348		}
1349	}
1350}
1351
1352static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1353				 u8 width, u32 *data)
1354{
1355	u8 addressofs = config_offset / 4;
1356wait:if (ftdi->disconnected > 0) {
1357		return -ENODEV;
1358	} else {
1359		int command_size;
1360		int respond_size;
1361		mutex_lock(&ftdi->u132_lock);
1362		command_size = ftdi->command_next - ftdi->command_head;
1363		respond_size = ftdi->respond_next - ftdi->respond_head;
1364		if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1365		{
1366			struct u132_command *command = &ftdi->command[
1367				COMMAND_MASK & ftdi->command_next];
1368			struct u132_respond *respond = &ftdi->respond[
1369				RESPOND_MASK & ftdi->respond_next];
1370			int result = -ENODEV;
1371			respond->result = &result;
1372			respond->header = command->header = 0x00 | (cPCIcfgrd &
1373								    0x0F);
1374			command->length = 0x04;
1375			respond->address = command->address = addressofs;
1376			command->width = 0x00 | (width & 0x0F);
1377			command->follows = 0;
1378			command->value = 0;
1379			command->buffer = NULL;
1380			respond->value = data;
1381			init_completion(&respond->wait_completion);
1382			ftdi->command_next += 1;
1383			ftdi->respond_next += 1;
1384			ftdi_elan_kick_command_queue(ftdi);
1385			mutex_unlock(&ftdi->u132_lock);
1386			wait_for_completion(&respond->wait_completion);
1387			return result;
1388		} else {
1389			mutex_unlock(&ftdi->u132_lock);
1390			msleep(100);
1391			goto wait;
1392		}
1393	}
1394}
1395
1396static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1397				 u8 width, u32 *data)
1398{
1399	u8 addressofs = mem_offset / 4;
1400wait:if (ftdi->disconnected > 0) {
1401		return -ENODEV;
1402	} else {
1403		int command_size;
1404		int respond_size;
1405		mutex_lock(&ftdi->u132_lock);
1406		command_size = ftdi->command_next - ftdi->command_head;
1407		respond_size = ftdi->respond_next - ftdi->respond_head;
1408		if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1409		{
1410			struct u132_command *command = &ftdi->command[
1411				COMMAND_MASK & ftdi->command_next];
1412			struct u132_respond *respond = &ftdi->respond[
1413				RESPOND_MASK & ftdi->respond_next];
1414			int result = -ENODEV;
1415			respond->result = &result;
1416			respond->header = command->header = 0x00 | (cPCImemrd &
1417								    0x0F);
1418			command->length = 0x04;
1419			respond->address = command->address = addressofs;
1420			command->width = 0x00 | (width & 0x0F);
1421			command->follows = 0;
1422			command->value = 0;
1423			command->buffer = NULL;
1424			respond->value = data;
1425			init_completion(&respond->wait_completion);
1426			ftdi->command_next += 1;
1427			ftdi->respond_next += 1;
1428			ftdi_elan_kick_command_queue(ftdi);
1429			mutex_unlock(&ftdi->u132_lock);
1430			wait_for_completion(&respond->wait_completion);
1431			return result;
1432		} else {
1433			mutex_unlock(&ftdi->u132_lock);
1434			msleep(100);
1435			goto wait;
1436		}
1437	}
1438}
1439
1440int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset,
1441			      u8 width, u32 *data)
1442{
1443	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1444	if (ftdi->initialized == 0) {
1445		return -ENODEV;
1446	} else
1447		return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data);
1448}
1449
1450
1451EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1452static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number,
1453				 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1454				 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1455						   int toggle_bits, int error_count, int condition_code, int repeat_number,
1456						   int halted, int skipped, int actual, int non_null))
1457{
1458	u8 ed = ed_number - 1;
1459wait:if (ftdi->disconnected > 0) {
1460		return -ENODEV;
1461	} else if (ftdi->initialized == 0) {
1462		return -ENODEV;
1463	} else {
1464		int command_size;
1465		mutex_lock(&ftdi->u132_lock);
1466		command_size = ftdi->command_next - ftdi->command_head;
1467		if (command_size < COMMAND_SIZE) {
1468			struct u132_target *target = &ftdi->target[ed];
1469			struct u132_command *command = &ftdi->command[
1470				COMMAND_MASK & ftdi->command_next];
1471			command->header = 0x80 | (ed << 5);
1472			command->length = 0x8007;
1473			command->address = (toggle_bits << 6) | (ep_number << 2)
1474				| (address << 0);
1475			command->width = usb_maxpacket(urb->dev, urb->pipe,
1476						       usb_pipeout(urb->pipe));
1477			command->follows = 8;
1478			command->value = 0;
1479			command->buffer = urb->setup_packet;
1480			target->callback = callback;
1481			target->endp = endp;
1482			target->urb = urb;
1483			target->active = 1;
1484			ftdi->command_next += 1;
1485			ftdi_elan_kick_command_queue(ftdi);
1486			mutex_unlock(&ftdi->u132_lock);
1487			return 0;
1488		} else {
1489			mutex_unlock(&ftdi->u132_lock);
1490			msleep(100);
1491			goto wait;
1492		}
1493	}
1494}
1495
1496int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number,
1497			      void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1498			      void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1499						int toggle_bits, int error_count, int condition_code, int repeat_number,
1500						int halted, int skipped, int actual, int non_null))
1501{
1502	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1503	return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address,
1504				     ep_number, toggle_bits, callback);
1505}
1506
1507
1508EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1509static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
1510				 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1511				 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1512						   int toggle_bits, int error_count, int condition_code, int repeat_number,
1513						   int halted, int skipped, int actual, int non_null))
1514{
1515	u8 ed = ed_number - 1;
1516wait:if (ftdi->disconnected > 0) {
1517		return -ENODEV;
1518	} else if (ftdi->initialized == 0) {
1519		return -ENODEV;
1520	} else {
1521		int command_size;
1522		mutex_lock(&ftdi->u132_lock);
1523		command_size = ftdi->command_next - ftdi->command_head;
1524		if (command_size < COMMAND_SIZE) {
1525			struct u132_target *target = &ftdi->target[ed];
1526			struct u132_command *command = &ftdi->command[
1527				COMMAND_MASK & ftdi->command_next];
1528			u32 remaining_length = urb->transfer_buffer_length -
1529				urb->actual_length;
1530			command->header = 0x82 | (ed << 5);
1531			if (remaining_length == 0) {
1532				command->length = 0x0000;
1533			} else if (remaining_length > 1024) {
1534				command->length = 0x8000 | 1023;
1535			} else
1536				command->length = 0x8000 | (remaining_length -
1537							    1);
1538			command->address = (toggle_bits << 6) | (ep_number << 2)
1539				| (address << 0);
1540			command->width = usb_maxpacket(urb->dev, urb->pipe,
1541						       usb_pipeout(urb->pipe));
1542			command->follows = 0;
1543			command->value = 0;
1544			command->buffer = NULL;
1545			target->callback = callback;
1546			target->endp = endp;
1547			target->urb = urb;
1548			target->active = 1;
1549			ftdi->command_next += 1;
1550			ftdi_elan_kick_command_queue(ftdi);
1551			mutex_unlock(&ftdi->u132_lock);
1552			return 0;
1553		} else {
1554			mutex_unlock(&ftdi->u132_lock);
1555			msleep(100);
1556			goto wait;
1557		}
1558	}
1559}
1560
1561int usb_ftdi_elan_edset_input(struct platform_device *pdev, u8 ed_number,
1562			      void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1563			      void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1564						int toggle_bits, int error_count, int condition_code, int repeat_number,
1565						int halted, int skipped, int actual, int non_null))
1566{
1567	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1568	return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address,
1569				     ep_number, toggle_bits, callback);
1570}
1571
1572
1573EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1574static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number,
1575				 void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1576				 void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1577						   int toggle_bits, int error_count, int condition_code, int repeat_number,
1578						   int halted, int skipped, int actual, int non_null))
1579{
1580	u8 ed = ed_number - 1;
1581wait:if (ftdi->disconnected > 0) {
1582		return -ENODEV;
1583	} else if (ftdi->initialized == 0) {
1584		return -ENODEV;
1585	} else {
1586		int command_size;
1587		mutex_lock(&ftdi->u132_lock);
1588		command_size = ftdi->command_next - ftdi->command_head;
1589		if (command_size < COMMAND_SIZE) {
1590			struct u132_target *target = &ftdi->target[ed];
1591			struct u132_command *command = &ftdi->command[
1592				COMMAND_MASK & ftdi->command_next];
1593			command->header = 0x81 | (ed << 5);
1594			command->length = 0x0000;
1595			command->address = (toggle_bits << 6) | (ep_number << 2)
1596				| (address << 0);
1597			command->width = usb_maxpacket(urb->dev, urb->pipe,
1598						       usb_pipeout(urb->pipe));
1599			command->follows = 0;
1600			command->value = 0;
1601			command->buffer = NULL;
1602			target->callback = callback;
1603			target->endp = endp;
1604			target->urb = urb;
1605			target->active = 1;
1606			ftdi->command_next += 1;
1607			ftdi_elan_kick_command_queue(ftdi);
1608			mutex_unlock(&ftdi->u132_lock);
1609			return 0;
1610		} else {
1611			mutex_unlock(&ftdi->u132_lock);
1612			msleep(100);
1613			goto wait;
1614		}
1615	}
1616}
1617
1618int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number,
1619			      void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1620			      void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1621						int toggle_bits, int error_count, int condition_code, int repeat_number,
1622						int halted, int skipped, int actual, int non_null))
1623{
1624	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1625	return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address,
1626				     ep_number, toggle_bits, callback);
1627}
1628
1629
1630EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1631static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
1632				  void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1633				  void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1634						    int toggle_bits, int error_count, int condition_code, int repeat_number,
1635						    int halted, int skipped, int actual, int non_null))
1636{
1637	u8 ed = ed_number - 1;
1638wait:if (ftdi->disconnected > 0) {
1639		return -ENODEV;
1640	} else if (ftdi->initialized == 0) {
1641		return -ENODEV;
1642	} else {
1643		int command_size;
1644		mutex_lock(&ftdi->u132_lock);
1645		command_size = ftdi->command_next - ftdi->command_head;
1646		if (command_size < COMMAND_SIZE) {
1647			u8 *b;
1648			u16 urb_size;
1649			int i = 0;
1650			char data[30 *3 + 4];
1651			char *d = data;
1652			int m = (sizeof(data) - 1) / 3 - 1;
1653			int l = 0;
1654			struct u132_target *target = &ftdi->target[ed];
1655			struct u132_command *command = &ftdi->command[
1656				COMMAND_MASK & ftdi->command_next];
1657			command->header = 0x81 | (ed << 5);
1658			command->address = (toggle_bits << 6) | (ep_number << 2)
1659				| (address << 0);
1660			command->width = usb_maxpacket(urb->dev, urb->pipe,
1661						       usb_pipeout(urb->pipe));
1662			command->follows = min_t(u32, 1024,
1663						 urb->transfer_buffer_length -
1664						 urb->actual_length);
1665			command->value = 0;
1666			command->buffer = urb->transfer_buffer +
1667				urb->actual_length;
1668			command->length = 0x8000 | (command->follows - 1);
1669			b = command->buffer;
1670			urb_size = command->follows;
1671			data[0] = 0;
1672			while (urb_size-- > 0) {
1673				if (i > m) {
1674				} else if (i++ < m) {
1675					int w = sprintf(d, " %02X", *b++);
1676					d += w;
1677					l += w;
1678				} else
1679					d += sprintf(d, " ..");
1680			}
1681			target->callback = callback;
1682			target->endp = endp;
1683			target->urb = urb;
1684			target->active = 1;
1685			ftdi->command_next += 1;
1686			ftdi_elan_kick_command_queue(ftdi);
1687			mutex_unlock(&ftdi->u132_lock);
1688			return 0;
1689		} else {
1690			mutex_unlock(&ftdi->u132_lock);
1691			msleep(100);
1692			goto wait;
1693		}
1694	}
1695}
1696
1697int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1698			       void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1699			       void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1700						 int toggle_bits, int error_count, int condition_code, int repeat_number,
1701						 int halted, int skipped, int actual, int non_null))
1702{
1703	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1704	return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1705				      ep_number, toggle_bits, callback);
1706}
1707
1708
1709EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1710static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1711				  void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1712				  void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1713						    int toggle_bits, int error_count, int condition_code, int repeat_number,
1714						    int halted, int skipped, int actual, int non_null))
1715{
1716	u8 ed = ed_number - 1;
1717wait:if (ftdi->disconnected > 0) {
1718		return -ENODEV;
1719	} else if (ftdi->initialized == 0) {
1720		return -ENODEV;
1721	} else {
1722		int command_size;
1723		mutex_lock(&ftdi->u132_lock);
1724		command_size = ftdi->command_next - ftdi->command_head;
1725		if (command_size < COMMAND_SIZE) {
1726			u32 remaining_length = urb->transfer_buffer_length -
1727				urb->actual_length;
1728			struct u132_target *target = &ftdi->target[ed];
1729			struct u132_command *command = &ftdi->command[
1730				COMMAND_MASK & ftdi->command_next];
1731			command->header = 0x83 | (ed << 5);
1732			if (remaining_length == 0) {
1733				command->length = 0x0000;
1734			} else if (remaining_length > 1024) {
1735				command->length = 0x8000 | 1023;
1736			} else
1737				command->length = 0x8000 | (remaining_length -
1738							    1);
1739			command->address = (toggle_bits << 6) | (ep_number << 2)
1740				| (address << 0);
1741			command->width = usb_maxpacket(urb->dev, urb->pipe,
1742						       usb_pipeout(urb->pipe));
1743			command->follows = 0;
1744			command->value = 0;
1745			command->buffer = NULL;
1746			target->callback = callback;
1747			target->endp = endp;
1748			target->urb = urb;
1749			target->active = 1;
1750			ftdi->command_next += 1;
1751			ftdi_elan_kick_command_queue(ftdi);
1752			mutex_unlock(&ftdi->u132_lock);
1753			return 0;
1754		} else {
1755			mutex_unlock(&ftdi->u132_lock);
1756			msleep(100);
1757			goto wait;
1758		}
1759	}
1760}
1761
1762int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1763			       void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1764			       void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1765						 int toggle_bits, int error_count, int condition_code, int repeat_number,
1766						 int halted, int skipped, int actual, int non_null))
1767{
1768	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1769	return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1770				      ep_number, toggle_bits, callback);
1771}
1772
1773
1774EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1775static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1776				 void *endp)
1777{
1778	u8 ed = ed_number - 1;
1779	if (ftdi->disconnected > 0) {
1780		return -ENODEV;
1781	} else if (ftdi->initialized == 0) {
1782		return -ENODEV;
1783	} else {
1784		struct u132_target *target = &ftdi->target[ed];
1785		mutex_lock(&ftdi->u132_lock);
1786		if (target->abandoning > 0) {
1787			mutex_unlock(&ftdi->u132_lock);
1788			return 0;
1789		} else {
1790			target->abandoning = 1;
1791		wait_1:if (target->active == 1) {
1792				int command_size = ftdi->command_next -
1793					ftdi->command_head;
1794				if (command_size < COMMAND_SIZE) {
1795					struct u132_command *command =
1796						&ftdi->command[COMMAND_MASK &
1797							       ftdi->command_next];
1798					command->header = 0x80 | (ed << 5) |
1799						0x4;
1800					command->length = 0x00;
1801					command->address = 0x00;
1802					command->width = 0x00;
1803					command->follows = 0;
1804					command->value = 0;
1805					command->buffer = &command->value;
1806					ftdi->command_next += 1;
1807					ftdi_elan_kick_command_queue(ftdi);
1808				} else {
1809					mutex_unlock(&ftdi->u132_lock);
1810					msleep(100);
1811					mutex_lock(&ftdi->u132_lock);
1812					goto wait_1;
1813				}
1814			}
1815			mutex_unlock(&ftdi->u132_lock);
1816			return 0;
1817		}
1818	}
1819}
1820
1821int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1822			      void *endp)
1823{
1824	struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1825	return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1826}
1827
1828
1829EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1830static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1831{
1832	int retry_on_empty = 10;
1833	int retry_on_timeout = 5;
1834	int retry_on_status = 20;
1835more:{
1836		int packet_bytes = 0;
1837		int retval = usb_bulk_msg(ftdi->udev,
1838					  usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1839					  ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1840					  &packet_bytes, 100);
1841		if (packet_bytes > 2) {
1842			char diag[30 *3 + 4];
1843			char *d = diag;
1844			int m = (sizeof(diag) - 1) / 3 - 1;
1845			char *b = ftdi->bulk_in_buffer;
1846			int bytes_read = 0;
1847			diag[0] = 0;
1848			while (packet_bytes-- > 0) {
1849				char c = *b++;
1850				if (bytes_read < m) {
1851					d += sprintf(d, " %02X",
1852						     0x000000FF & c);
1853				} else if (bytes_read > m) {
1854				} else
1855					d += sprintf(d, " ..");
1856				bytes_read += 1;
1857				continue;
1858			}
1859			goto more;
1860		} else if (packet_bytes > 1) {
1861			char s1 = ftdi->bulk_in_buffer[0];
1862			char s2 = ftdi->bulk_in_buffer[1];
1863			if (s1 == 0x31 && s2 == 0x60) {
1864				return 0;
1865			} else if (retry_on_status-- > 0) {
1866				goto more;
1867			} else {
1868				dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1869				return -EFAULT;
1870			}
1871		} else if (packet_bytes > 0) {
1872			char b1 = ftdi->bulk_in_buffer[0];
1873			dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n",
1874				b1);
1875			if (retry_on_status-- > 0) {
1876				goto more;
1877			} else {
1878				dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
1879				return -EFAULT;
1880			}
1881		} else if (retval == -ETIMEDOUT) {
1882			if (retry_on_timeout-- > 0) {
1883				goto more;
1884			} else {
1885				dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
1886				return -ENOMEM;
1887			}
1888		} else if (retval == 0) {
1889			if (retry_on_empty-- > 0) {
1890				goto more;
1891			} else {
1892				dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
1893				return -ENOMEM;
1894			}
1895		} else {
1896			dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1897			return retval;
1898		}
1899	}
1900	return -1;
1901}
1902
1903
1904/*
1905 * send the long flush sequence
1906 *
1907 */
1908static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1909{
1910	int retval;
1911	struct urb *urb;
1912	char *buf;
1913	int I = 257;
1914	int i = 0;
1915	urb = usb_alloc_urb(0, GFP_KERNEL);
1916	if (!urb)
1917		return -ENOMEM;
1918	buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1919	if (!buf) {
1920		dev_err(&ftdi->udev->dev, "could not get a buffer for flush sequence\n");
1921		usb_free_urb(urb);
1922		return -ENOMEM;
1923	}
1924	while (I-- > 0)
1925		buf[i++] = 0x55;
1926	usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1927							   ftdi->bulk_out_endpointAddr), buf, i,
1928			  ftdi_elan_write_bulk_callback, ftdi);
1929	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1930	retval = usb_submit_urb(urb, GFP_KERNEL);
1931	if (retval) {
1932		dev_err(&ftdi->udev->dev, "failed to submit urb containing the flush sequence\n");
1933		usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1934		usb_free_urb(urb);
1935		return -ENOMEM;
1936	}
1937	usb_free_urb(urb);
1938	return 0;
1939}
1940
1941
1942/*
1943 * send the reset sequence
1944 *
1945 */
1946static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
1947{
1948	int retval;
1949	struct urb *urb;
1950	char *buf;
1951	int I = 4;
1952	int i = 0;
1953	urb = usb_alloc_urb(0, GFP_KERNEL);
1954	if (!urb)
1955		return -ENOMEM;
1956	buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1957	if (!buf) {
1958		dev_err(&ftdi->udev->dev, "could not get a buffer for the reset sequence\n");
1959		usb_free_urb(urb);
1960		return -ENOMEM;
1961	}
1962	buf[i++] = 0x55;
1963	buf[i++] = 0xAA;
1964	buf[i++] = 0x5A;
1965	buf[i++] = 0xA5;
1966	usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1967							   ftdi->bulk_out_endpointAddr), buf, i,
1968			  ftdi_elan_write_bulk_callback, ftdi);
1969	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1970	retval = usb_submit_urb(urb, GFP_KERNEL);
1971	if (retval) {
1972		dev_err(&ftdi->udev->dev, "failed to submit urb containing the reset sequence\n");
1973		usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1974		usb_free_urb(urb);
1975		return -ENOMEM;
1976	}
1977	usb_free_urb(urb);
1978	return 0;
1979}
1980
1981static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
1982{
1983	int retval;
1984	int long_stop = 10;
1985	int retry_on_timeout = 5;
1986	int retry_on_empty = 10;
1987	int err_count = 0;
1988	retval = ftdi_elan_flush_input_fifo(ftdi);
1989	if (retval)
1990		return retval;
1991	ftdi->bulk_in_left = 0;
1992	ftdi->bulk_in_last = -1;
1993	while (long_stop-- > 0) {
1994		int read_stop;
1995		int read_stuck;
1996		retval = ftdi_elan_synchronize_flush(ftdi);
1997		if (retval)
1998			return retval;
1999		retval = ftdi_elan_flush_input_fifo(ftdi);
2000		if (retval)
2001			return retval;
2002	reset:retval = ftdi_elan_synchronize_reset(ftdi);
2003		if (retval)
2004			return retval;
2005		read_stop = 100;
2006		read_stuck = 10;
2007	read:{
2008			int packet_bytes = 0;
2009			retval = usb_bulk_msg(ftdi->udev,
2010					      usb_rcvbulkpipe(ftdi->udev,
2011							      ftdi->bulk_in_endpointAddr),
2012					      ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2013					      &packet_bytes, 500);
2014			if (packet_bytes > 2) {
2015				char diag[30 *3 + 4];
2016				char *d = diag;
2017				int m = (sizeof(diag) - 1) / 3 - 1;
2018				char *b = ftdi->bulk_in_buffer;
2019				int bytes_read = 0;
2020				unsigned char c = 0;
2021				diag[0] = 0;
2022				while (packet_bytes-- > 0) {
2023					c = *b++;
2024					if (bytes_read < m) {
2025						d += sprintf(d, " %02X", c);
2026					} else if (bytes_read > m) {
2027					} else
2028						d += sprintf(d, " ..");
2029					bytes_read += 1;
2030					continue;
2031				}
2032				if (c == 0x7E) {
2033					return 0;
2034				} else {
2035					if (c == 0x55) {
2036						goto read;
2037					} else if (read_stop-- > 0) {
2038						goto read;
2039					} else {
2040						dev_err(&ftdi->udev->dev, "retry limit reached\n");
2041						continue;
2042					}
2043				}
2044			} else if (packet_bytes > 1) {
2045				unsigned char s1 = ftdi->bulk_in_buffer[0];
2046				unsigned char s2 = ftdi->bulk_in_buffer[1];
2047				if (s1 == 0x31 && s2 == 0x00) {
2048					if (read_stuck-- > 0) {
2049						goto read;
2050					} else
2051						goto reset;
2052				} else if (s1 == 0x31 && s2 == 0x60) {
2053					if (read_stop-- > 0) {
2054						goto read;
2055					} else {
2056						dev_err(&ftdi->udev->dev, "retry limit reached\n");
2057						continue;
2058					}
2059				} else {
2060					if (read_stop-- > 0) {
2061						goto read;
2062					} else {
2063						dev_err(&ftdi->udev->dev, "retry limit reached\n");
2064						continue;
2065					}
2066				}
2067			} else if (packet_bytes > 0) {
2068				if (read_stop-- > 0) {
2069					goto read;
2070				} else {
2071					dev_err(&ftdi->udev->dev, "retry limit reached\n");
2072					continue;
2073				}
2074			} else if (retval == -ETIMEDOUT) {
2075				if (retry_on_timeout-- > 0) {
2076					goto read;
2077				} else {
2078					dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2079					continue;
2080				}
2081			} else if (retval == 0) {
2082				if (retry_on_empty-- > 0) {
2083					goto read;
2084				} else {
2085					dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2086					continue;
2087				}
2088			} else {
2089				err_count += 1;
2090				dev_err(&ftdi->udev->dev, "error = %d\n",
2091					retval);
2092				if (read_stop-- > 0) {
2093					goto read;
2094				} else {
2095					dev_err(&ftdi->udev->dev, "retry limit reached\n");
2096					continue;
2097				}
2098			}
2099		}
2100	}
2101	dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2102	return -EFAULT;
2103}
2104
2105static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2106{
2107	int retry_on_empty = 10;
2108	int retry_on_timeout = 5;
2109	int retry_on_status = 50;
2110more:{
2111		int packet_bytes = 0;
2112		int retval = usb_bulk_msg(ftdi->udev,
2113					  usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2114					  ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2115					  &packet_bytes, 1000);
2116		if (packet_bytes > 2) {
2117			char diag[30 *3 + 4];
2118			char *d = diag;
2119			int m = (sizeof(diag) - 1) / 3 - 1;
2120			char *b = ftdi->bulk_in_buffer;
2121			int bytes_read = 0;
2122			diag[0] = 0;
2123			while (packet_bytes-- > 0) {
2124				char c = *b++;
2125				if (bytes_read < m) {
2126					d += sprintf(d, " %02X",
2127						     0x000000FF & c);
2128				} else if (bytes_read > m) {
2129				} else
2130					d += sprintf(d, " ..");
2131				bytes_read += 1;
2132				continue;
2133			}
2134			goto more;
2135		} else if (packet_bytes > 1) {
2136			char s1 = ftdi->bulk_in_buffer[0];
2137			char s2 = ftdi->bulk_in_buffer[1];
2138			if (s1 == 0x31 && s2 == 0x60) {
2139				return 0;
2140			} else if (retry_on_status-- > 0) {
2141				msleep(5);
2142				goto more;
2143			} else
2144				return -EFAULT;
2145		} else if (packet_bytes > 0) {
2146			char b1 = ftdi->bulk_in_buffer[0];
2147			dev_err(&ftdi->udev->dev, "only one byte flushed from FTDI = %02X\n", b1);
2148			if (retry_on_status-- > 0) {
2149				msleep(5);
2150				goto more;
2151			} else {
2152				dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n");
2153				return -EFAULT;
2154			}
2155		} else if (retval == -ETIMEDOUT) {
2156			if (retry_on_timeout-- > 0) {
2157				goto more;
2158			} else {
2159				dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n");
2160				return -ENOMEM;
2161			}
2162		} else if (retval == 0) {
2163			if (retry_on_empty-- > 0) {
2164				goto more;
2165			} else {
2166				dev_err(&ftdi->udev->dev, "empty packet retry limit reached\n");
2167				return -ENOMEM;
2168			}
2169		} else {
2170			dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2171			return -ENOMEM;
2172		}
2173	}
2174	return -1;
2175}
2176
2177static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2178{
2179	int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2180	if (UxxxStatus)
2181		return UxxxStatus;
2182	if (ftdi->controlreg & 0x00400000) {
2183		if (ftdi->card_ejected) {
2184		} else {
2185			ftdi->card_ejected = 1;
2186			dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = %08X\n",
2187				ftdi->controlreg);
2188		}
2189		return -ENODEV;
2190	} else {
2191		u8 fn = ftdi->function - 1;
2192		int activePCIfn = fn << 8;
2193		u32 pcidata;
2194		u32 pciVID;
2195		u32 pciPID;
2196		int reg = 0;
2197		UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2198						   &pcidata);
2199		if (UxxxStatus)
2200			return UxxxStatus;
2201		pciVID = pcidata & 0xFFFF;
2202		pciPID = (pcidata >> 16) & 0xFFFF;
2203		if (pciVID == ftdi->platform_data.vendor && pciPID ==
2204		    ftdi->platform_data.device) {
2205			return 0;
2206		} else {
2207			dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X device=%04X pciPID=%04X\n",
2208				ftdi->platform_data.vendor, pciVID,
2209				ftdi->platform_data.device, pciPID);
2210			return -ENODEV;
2211		}
2212	}
2213}
2214
2215
2216#define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \
2217								   offsetof(struct ohci_regs, member), 0, data);
2218#define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \
2219								     offsetof(struct ohci_regs, member), 0, data);
2220
2221#define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
2222#define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD |	\
2223			OHCI_INTR_WDH)
2224static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk)
2225{
2226	int devices = 0;
2227	int retval;
2228	u32 hc_control;
2229	int num_ports;
2230	u32 control;
2231	u32 rh_a = -1;
2232	u32 status;
2233	u32 fminterval;
2234	u32 hc_fminterval;
2235	u32 periodicstart;
2236	u32 cmdstatus;
2237	u32 roothub_a;
2238	int mask = OHCI_INTR_INIT;
2239	int sleep_time = 0;
2240	int reset_timeout = 30;        /* ... allow extra time */
2241	int temp;
2242	retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE);
2243	if (retval)
2244		return retval;
2245	retval = ftdi_read_pcimem(ftdi, control, &control);
2246	if (retval)
2247		return retval;
2248	retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a);
2249	if (retval)
2250		return retval;
2251	num_ports = rh_a & RH_A_NDP;
2252	retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval);
2253	if (retval)
2254		return retval;
2255	hc_fminterval &= 0x3fff;
2256	if (hc_fminterval != FI) {
2257	}
2258	hc_fminterval |= FSMP(hc_fminterval) << 16;
2259	retval = ftdi_read_pcimem(ftdi, control, &hc_control);
2260	if (retval)
2261		return retval;
2262	switch (hc_control & OHCI_CTRL_HCFS) {
2263	case OHCI_USB_OPER:
2264		sleep_time = 0;
2265		break;
2266	case OHCI_USB_SUSPEND:
2267	case OHCI_USB_RESUME:
2268		hc_control &= OHCI_CTRL_RWC;
2269		hc_control |= OHCI_USB_RESUME;
2270		sleep_time = 10;
2271		break;
2272	default:
2273		hc_control &= OHCI_CTRL_RWC;
2274		hc_control |= OHCI_USB_RESET;
2275		sleep_time = 50;
2276		break;
2277	}
2278	retval = ftdi_write_pcimem(ftdi, control, hc_control);
2279	if (retval)
2280		return retval;
2281	retval = ftdi_read_pcimem(ftdi, control, &control);
2282	if (retval)
2283		return retval;
2284	msleep(sleep_time);
2285	retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2286	if (retval)
2287		return retval;
2288	if (!(roothub_a & RH_A_NPS)) {        /* power down each port */
2289		for (temp = 0; temp < num_ports; temp++) {
2290			retval = ftdi_write_pcimem(ftdi,
2291						   roothub.portstatus[temp], RH_PS_LSDA);
2292			if (retval)
2293				return retval;
2294		}
2295	}
2296	retval = ftdi_read_pcimem(ftdi, control, &control);
2297	if (retval)
2298		return retval;
2299retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2300	if (retval)
2301		return retval;
2302	retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR);
2303	if (retval)
2304		return retval;
2305extra:{
2306		retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2307		if (retval)
2308			return retval;
2309		if (0 != (status & OHCI_HCR)) {
2310			if (--reset_timeout == 0) {
2311				dev_err(&ftdi->udev->dev, "USB HC reset timed out!\n");
2312				return -ENODEV;
2313			} else {
2314				msleep(5);
2315				goto extra;
2316			}
2317		}
2318	}
2319	if (quirk & OHCI_QUIRK_INITRESET) {
2320		retval = ftdi_write_pcimem(ftdi, control, hc_control);
2321		if (retval)
2322			return retval;
2323		retval = ftdi_read_pcimem(ftdi, control, &control);
2324		if (retval)
2325			return retval;
2326	}
2327	retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000);
2328	if (retval)
2329		return retval;
2330	retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000);
2331	if (retval)
2332		return retval;
2333	retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000);
2334	if (retval)
2335		return retval;
2336	retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2337	if (retval)
2338		return retval;
2339	retval = ftdi_write_pcimem(ftdi, fminterval,
2340				   ((fminterval & FIT) ^ FIT) | hc_fminterval);
2341	if (retval)
2342		return retval;
2343	retval = ftdi_write_pcimem(ftdi, periodicstart,
2344				   ((9 *hc_fminterval) / 10) & 0x3fff);
2345	if (retval)
2346		return retval;
2347	retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2348	if (retval)
2349		return retval;
2350	retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart);
2351	if (retval)
2352		return retval;
2353	if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) {
2354		if (!(quirk & OHCI_QUIRK_INITRESET)) {
2355			quirk |= OHCI_QUIRK_INITRESET;
2356			goto retry;
2357		} else
2358			dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n",
2359				fminterval, periodicstart);
2360	}                        /* start controller operations */
2361	hc_control &= OHCI_CTRL_RWC;
2362	hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER;
2363	retval = ftdi_write_pcimem(ftdi, control, hc_control);
2364	if (retval)
2365		return retval;
2366	retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF);
2367	if (retval)
2368		return retval;
2369	retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus);
2370	if (retval)
2371		return retval;
2372	retval = ftdi_read_pcimem(ftdi, control, &control);
2373	if (retval)
2374		return retval;
2375	retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE);
2376	if (retval)
2377		return retval;
2378	retval = ftdi_write_pcimem(ftdi, intrstatus, mask);
2379	if (retval)
2380		return retval;
2381	retval = ftdi_write_pcimem(ftdi, intrdisable,
2382				   OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO |
2383				   OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH |
2384				   OHCI_INTR_SO);
2385	if (retval)
2386		return retval;        /* handle root hub init quirks ... */
2387	retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2388	if (retval)
2389		return retval;
2390	roothub_a &= ~(RH_A_PSM | RH_A_OCPM);
2391	if (quirk & OHCI_QUIRK_SUPERIO) {
2392		roothub_a |= RH_A_NOCP;
2393		roothub_a &= ~(RH_A_POTPGT | RH_A_NPS);
2394		retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2395		if (retval)
2396			return retval;
2397	} else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) {
2398		roothub_a |= RH_A_NPS;
2399		retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2400		if (retval)
2401			return retval;
2402	}
2403	retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC);
2404	if (retval)
2405		return retval;
2406	retval = ftdi_write_pcimem(ftdi, roothub.b,
2407				   (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM);
2408	if (retval)
2409		return retval;
2410	retval = ftdi_read_pcimem(ftdi, control, &control);
2411	if (retval)
2412		return retval;
2413	mdelay((roothub_a >> 23) & 0x1fe);
2414	for (temp = 0; temp < num_ports; temp++) {
2415		u32 portstatus;
2416		retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp],
2417					  &portstatus);
2418		if (retval)
2419			return retval;
2420		if (1 & portstatus)
2421			devices += 1;
2422	}
2423	return devices;
2424}
2425
2426static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn)
2427{
2428	u32 latence_timer;
2429	int UxxxStatus;
2430	u32 pcidata;
2431	int reg = 0;
2432	int activePCIfn = fn << 8;
2433	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2434	if (UxxxStatus)
2435		return UxxxStatus;
2436	reg = 16;
2437	UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2438					    0xFFFFFFFF);
2439	if (UxxxStatus)
2440		return UxxxStatus;
2441	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2442					   &pcidata);
2443	if (UxxxStatus)
2444		return UxxxStatus;
2445	UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2446					    0xF0000000);
2447	if (UxxxStatus)
2448		return UxxxStatus;
2449	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2450					   &pcidata);
2451	if (UxxxStatus)
2452		return UxxxStatus;
2453	reg = 12;
2454	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2455					   &latence_timer);
2456	if (UxxxStatus)
2457		return UxxxStatus;
2458	latence_timer &= 0xFFFF00FF;
2459	latence_timer |= 0x00001600;
2460	UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2461					    latence_timer);
2462	if (UxxxStatus)
2463		return UxxxStatus;
2464	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2465					   &pcidata);
2466	if (UxxxStatus)
2467		return UxxxStatus;
2468	reg = 4;
2469	UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2470					    0x06);
2471	if (UxxxStatus)
2472		return UxxxStatus;
2473	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2474					   &pcidata);
2475	if (UxxxStatus)
2476		return UxxxStatus;
2477	for (reg = 0; reg <= 0x54; reg += 4) {
2478		UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2479		if (UxxxStatus)
2480			return UxxxStatus;
2481	}
2482	return 0;
2483}
2484
2485static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn)
2486{
2487	u32 latence_timer;
2488	int UxxxStatus;
2489	u32 pcidata;
2490	int reg = 0;
2491	int activePCIfn = fn << 8;
2492	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2493	if (UxxxStatus)
2494		return UxxxStatus;
2495	reg = 16;
2496	UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2497					    0xFFFFFFFF);
2498	if (UxxxStatus)
2499		return UxxxStatus;
2500	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2501					   &pcidata);
2502	if (UxxxStatus)
2503		return UxxxStatus;
2504	UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2505					    0x00000000);
2506	if (UxxxStatus)
2507		return UxxxStatus;
2508	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2509					   &pcidata);
2510	if (UxxxStatus)
2511		return UxxxStatus;
2512	reg = 12;
2513	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2514					   &latence_timer);
2515	if (UxxxStatus)
2516		return UxxxStatus;
2517	latence_timer &= 0xFFFF00FF;
2518	latence_timer |= 0x00001600;
2519	UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2520					    latence_timer);
2521	if (UxxxStatus)
2522		return UxxxStatus;
2523	UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2524					   &pcidata);
2525	if (UxxxStatus)
2526		return UxxxStatus;
2527	reg = 4;
2528	UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2529					    0x00);
2530	if (UxxxStatus)
2531		return UxxxStatus;
2532	return ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, &pcidata);
2533}
2534
2535static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk)
2536{
2537	int result;
2538	int UxxxStatus;
2539	UxxxStatus = ftdi_elan_setup_controller(ftdi, fn);
2540	if (UxxxStatus)
2541		return UxxxStatus;
2542	result = ftdi_elan_check_controller(ftdi, quirk);
2543	UxxxStatus = ftdi_elan_close_controller(ftdi, fn);
2544	if (UxxxStatus)
2545		return UxxxStatus;
2546	return result;
2547}
2548
2549static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2550{
2551	u32 controlreg;
2552	u8 sensebits;
2553	int UxxxStatus;
2554	UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2555	if (UxxxStatus)
2556		return UxxxStatus;
2557	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2558	if (UxxxStatus)
2559		return UxxxStatus;
2560	msleep(750);
2561	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2562	if (UxxxStatus)
2563		return UxxxStatus;
2564	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2565	if (UxxxStatus)
2566		return UxxxStatus;
2567	UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2568	if (UxxxStatus)
2569		return UxxxStatus;
2570	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2571	if (UxxxStatus)
2572		return UxxxStatus;
2573	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2574	if (UxxxStatus)
2575		return UxxxStatus;
2576	msleep(250);
2577	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2578	if (UxxxStatus)
2579		return UxxxStatus;
2580	UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2581	if (UxxxStatus)
2582		return UxxxStatus;
2583	UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2584	if (UxxxStatus)
2585		return UxxxStatus;
2586	UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2587	if (UxxxStatus)
2588		return UxxxStatus;
2589	UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2590	if (UxxxStatus)
2591		return UxxxStatus;
2592	msleep(1000);
2593	sensebits = (controlreg >> 16) & 0x000F;
2594	if (0x0D == sensebits)
2595		return 0;
2596	else
2597		return - ENXIO;
2598}
2599
2600static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2601{
2602	int UxxxStatus;
2603	u32 pcidata;
2604	int reg = 0;
2605	u8 fn;
2606	int activePCIfn = 0;
2607	int max_devices = 0;
2608	int controllers = 0;
2609	int unrecognized = 0;
2610	ftdi->function = 0;
2611	for (fn = 0; (fn < 4); fn++) {
2612		u32 pciVID = 0;
2613		u32 pciPID = 0;
2614		int devices = 0;
2615		activePCIfn = fn << 8;
2616		UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2617						   &pcidata);
2618		if (UxxxStatus)
2619			return UxxxStatus;
2620		pciVID = pcidata & 0xFFFF;
2621		pciPID = (pcidata >> 16) & 0xFFFF;
2622		if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) {
2623			devices = ftdi_elan_found_controller(ftdi, fn, 0);
2624			controllers += 1;
2625		} else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035))
2626		{
2627			devices = ftdi_elan_found_controller(ftdi, fn, 0);
2628			controllers += 1;
2629		} else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) {
2630			devices = ftdi_elan_found_controller(ftdi, fn, 0);
2631			controllers += 1;
2632		} else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802))
2633		{
2634			devices = ftdi_elan_found_controller(ftdi, fn, 0);
2635			controllers += 1;
2636		} else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) {
2637			devices = ftdi_elan_found_controller(ftdi, fn,
2638							     OHCI_QUIRK_AMD756);
2639			controllers += 1;
2640		} else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) {
2641			devices = ftdi_elan_found_controller(ftdi, fn,
2642							     OHCI_QUIRK_ZFMICRO);
2643			controllers += 1;
2644		} else if (0 == pcidata) {
2645		} else
2646			unrecognized += 1;
2647		if (devices > max_devices) {
2648			max_devices = devices;
2649			ftdi->function = fn + 1;
2650			ftdi->platform_data.vendor = pciVID;
2651			ftdi->platform_data.device = pciPID;
2652		}
2653	}
2654	if (ftdi->function > 0) {
2655		return ftdi_elan_setup_controller(ftdi,	ftdi->function - 1);
2656	} else if (controllers > 0) {
2657		return -ENXIO;
2658	} else if (unrecognized > 0) {
2659		return -ENXIO;
2660	} else {
2661		ftdi->enumerated = 0;
2662		return -ENXIO;
2663	}
2664}
2665
2666
2667/*
2668 * we use only the first bulk-in and bulk-out endpoints
2669 */
2670static int ftdi_elan_probe(struct usb_interface *interface,
2671			   const struct usb_device_id *id)
2672{
2673	struct usb_host_interface *iface_desc;
2674	struct usb_endpoint_descriptor *bulk_in, *bulk_out;
2675	int retval;
2676	struct usb_ftdi *ftdi;
2677
2678	ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2679	if (!ftdi)
2680		return -ENOMEM;
2681
2682	mutex_lock(&ftdi_module_lock);
2683	list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2684	ftdi->sequence_num = ++ftdi_instances;
2685	mutex_unlock(&ftdi_module_lock);
2686	ftdi_elan_init_kref(ftdi);
2687	sema_init(&ftdi->sw_lock, 1);
2688	ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2689	ftdi->interface = interface;
2690	mutex_init(&ftdi->u132_lock);
2691	ftdi->expected = 4;
2692
2693	iface_desc = interface->cur_altsetting;
2694	retval = usb_find_common_endpoints(iface_desc,
2695			&bulk_in, &bulk_out, NULL, NULL);
2696	if (retval) {
2697		dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk-out endpoints\n");
2698		goto error;
2699	}
2700
2701	ftdi->bulk_in_size = usb_endpoint_maxp(bulk_in);
2702	ftdi->bulk_in_endpointAddr = bulk_in->bEndpointAddress;
2703	ftdi->bulk_in_buffer = kmalloc(ftdi->bulk_in_size, GFP_KERNEL);
2704	if (!ftdi->bulk_in_buffer) {
2705		retval = -ENOMEM;
2706		goto error;
2707	}
2708
2709	ftdi->bulk_out_endpointAddr = bulk_out->bEndpointAddress;
2710
2711	dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2712		 iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2713		 ftdi->bulk_out_endpointAddr);
2714	usb_set_intfdata(interface, ftdi);
2715	if (iface_desc->desc.bInterfaceNumber == 0 &&
2716	    ftdi->bulk_in_endpointAddr == 0x81 &&
2717	    ftdi->bulk_out_endpointAddr == 0x02) {
2718		retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2719		if (retval) {
2720			dev_err(&ftdi->udev->dev, "Not able to get a minor for this device\n");
2721			usb_set_intfdata(interface, NULL);
2722			retval = -ENOMEM;
2723			goto error;
2724		} else {
2725			ftdi->class = &ftdi_elan_jtag_class;
2726			dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface %d now attached to ftdi%d\n",
2727				 ftdi, iface_desc->desc.bInterfaceNumber,
2728				 interface->minor);
2729			return 0;
2730		}
2731	} else if (iface_desc->desc.bInterfaceNumber == 1 &&
2732		   ftdi->bulk_in_endpointAddr == 0x83 &&
2733		   ftdi->bulk_out_endpointAddr == 0x04) {
2734		ftdi->class = NULL;
2735		dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now activated\n",
2736			 ftdi, iface_desc->desc.bInterfaceNumber);
2737		INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2738		INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2739		INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2740		ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2741		return 0;
2742	} else {
2743		dev_err(&ftdi->udev->dev,
2744			"Could not find ELAN's U132 device\n");
2745		retval = -ENODEV;
2746		goto error;
2747	}
2748error:if (ftdi) {
2749		ftdi_elan_put_kref(ftdi);
2750	}
2751	return retval;
2752}
2753
2754static void ftdi_elan_disconnect(struct usb_interface *interface)
2755{
2756	struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2757	ftdi->disconnected += 1;
2758	if (ftdi->class) {
2759		int minor = interface->minor;
2760		struct usb_class_driver *class = ftdi->class;
2761		usb_set_intfdata(interface, NULL);
2762		usb_deregister_dev(interface, class);
2763		dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on minor %d now disconnected\n",
2764			 minor);
2765	} else {
2766		ftdi_status_cancel_work(ftdi);
2767		ftdi_command_cancel_work(ftdi);
2768		ftdi_response_cancel_work(ftdi);
2769		ftdi_elan_abandon_completions(ftdi);
2770		ftdi_elan_abandon_targets(ftdi);
2771		if (ftdi->registered) {
2772			platform_device_unregister(&ftdi->platform_dev);
2773			ftdi->synchronized = 0;
2774			ftdi->enumerated = 0;
2775			ftdi->initialized = 0;
2776			ftdi->registered = 0;
2777		}
2778		ftdi->disconnected += 1;
2779		usb_set_intfdata(interface, NULL);
2780		dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller interface now disconnected\n");
2781	}
2782	ftdi_elan_put_kref(ftdi);
2783}
2784
2785static struct usb_driver ftdi_elan_driver = {
2786	.name = "ftdi-elan",
2787	.probe = ftdi_elan_probe,
2788	.disconnect = ftdi_elan_disconnect,
2789	.id_table = ftdi_elan_table,
2790};
2791static int __init ftdi_elan_init(void)
2792{
2793	int result;
2794	pr_info("driver %s\n", ftdi_elan_driver.name);
2795	mutex_init(&ftdi_module_lock);
2796	INIT_LIST_HEAD(&ftdi_static_list);
2797	result = usb_register(&ftdi_elan_driver);
2798	if (result) {
2799		pr_err("usb_register failed. Error number %d\n", result);
2800	}
2801	return result;
2802
2803}
2804
2805static void __exit ftdi_elan_exit(void)
2806{
2807	struct usb_ftdi *ftdi;
2808	struct usb_ftdi *temp;
2809	usb_deregister(&ftdi_elan_driver);
2810	pr_info("ftdi_u132 driver deregistered\n");
2811	list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2812		ftdi_status_cancel_work(ftdi);
2813		ftdi_command_cancel_work(ftdi);
2814		ftdi_response_cancel_work(ftdi);
2815	}
2816}
2817
2818
2819module_init(ftdi_elan_init);
2820module_exit(ftdi_elan_exit);