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