| /* |
| * USB FTDI client driver for Elan Digital Systems's Uxxx adapters |
| * |
| * Copyright(C) 2006 Elan Digital Systems Limited |
| * http://www.elandigitalsystems.com |
| * |
| * Author and Maintainer - Tony Olech - Elan Digital Systems |
| * tony.olech@elandigitalsystems.com |
| * |
| * This program is free software;you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation, version 2. |
| * |
| * |
| * This driver was written by Tony Olech(tony.olech@elandigitalsystems.com) |
| * based on various USB client drivers in the 2.6.15 linux kernel |
| * with constant reference to the 3rd Edition of Linux Device Drivers |
| * published by O'Reilly |
| * |
| * The U132 adapter is a USB to CardBus adapter specifically designed |
| * for PC cards that contain an OHCI host controller. Typical PC cards |
| * are the Orange Mobile 3G Option GlobeTrotter Fusion card. |
| * |
| * The U132 adapter will *NOT *work with PC cards that do not contain |
| * an OHCI controller. A simple way to test whether a PC card has an |
| * OHCI controller as an interface is to insert the PC card directly |
| * into a laptop(or desktop) with a CardBus slot and if "lspci" shows |
| * a new USB controller and "lsusb -v" shows a new OHCI Host Controller |
| * then there is a good chance that the U132 adapter will support the |
| * PC card.(you also need the specific client driver for the PC card) |
| * |
| * Please inform the Author and Maintainer about any PC cards that |
| * contain OHCI Host Controller and work when directly connected to |
| * an embedded CardBus slot but do not work when they are connected |
| * via an ELAN U132 adapter. |
| * |
| */ |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include <linux/list.h> |
| #include <linux/ioctl.h> |
| #include <linux/pci_ids.h> |
| #include <linux/slab.h> |
| #include <linux/module.h> |
| #include <linux/kref.h> |
| #include <linux/mutex.h> |
| #include <asm/uaccess.h> |
| #include <linux/usb.h> |
| #include <linux/workqueue.h> |
| #include <linux/platform_device.h> |
| MODULE_AUTHOR("Tony Olech"); |
| MODULE_DESCRIPTION("FTDI ELAN driver"); |
| MODULE_LICENSE("GPL"); |
| #define INT_MODULE_PARM(n, v) static int n = v;module_param(n, int, 0444) |
| static bool distrust_firmware = 1; |
| module_param(distrust_firmware, bool, 0); |
| MODULE_PARM_DESC(distrust_firmware, "true to distrust firmware power/overcurren" |
| "t setup"); |
| extern struct platform_driver u132_platform_driver; |
| static struct workqueue_struct *status_queue; |
| static struct workqueue_struct *command_queue; |
| static struct workqueue_struct *respond_queue; |
| /* |
| * ftdi_module_lock exists to protect access to global variables |
| * |
| */ |
| static struct mutex ftdi_module_lock; |
| static int ftdi_instances = 0; |
| static struct list_head ftdi_static_list; |
| /* |
| * end of the global variables protected by ftdi_module_lock |
| */ |
| #include "usb_u132.h" |
| #include <asm/io.h> |
| #include <linux/usb/hcd.h> |
| |
| /* FIXME ohci.h is ONLY for internal use by the OHCI driver. |
| * If you're going to try stuff like this, you need to split |
| * out shareable stuff (register declarations?) into its own |
| * file, maybe name <linux/usb/ohci.h> |
| */ |
| |
| #include "../host/ohci.h" |
| /* Define these values to match your devices*/ |
| #define USB_FTDI_ELAN_VENDOR_ID 0x0403 |
| #define USB_FTDI_ELAN_PRODUCT_ID 0xd6ea |
| /* table of devices that work with this driver*/ |
| static const struct usb_device_id ftdi_elan_table[] = { |
| {USB_DEVICE(USB_FTDI_ELAN_VENDOR_ID, USB_FTDI_ELAN_PRODUCT_ID)}, |
| { /* Terminating entry */ } |
| }; |
| |
| MODULE_DEVICE_TABLE(usb, ftdi_elan_table); |
| /* only the jtag(firmware upgrade device) interface requires |
| * a device file and corresponding minor number, but the |
| * interface is created unconditionally - I suppose it could |
| * be configured or not according to a module parameter. |
| * But since we(now) require one interface per device, |
| * and since it unlikely that a normal installation would |
| * require more than a couple of elan-ftdi devices, 8 seems |
| * like a reasonable limit to have here, and if someone |
| * really requires more than 8 devices, then they can frig the |
| * code and recompile |
| */ |
| #define USB_FTDI_ELAN_MINOR_BASE 192 |
| #define COMMAND_BITS 5 |
| #define COMMAND_SIZE (1<<COMMAND_BITS) |
| #define COMMAND_MASK (COMMAND_SIZE-1) |
| struct u132_command { |
| u8 header; |
| u16 length; |
| u8 address; |
| u8 width; |
| u32 value; |
| int follows; |
| void *buffer; |
| }; |
| #define RESPOND_BITS 5 |
| #define RESPOND_SIZE (1<<RESPOND_BITS) |
| #define RESPOND_MASK (RESPOND_SIZE-1) |
| struct u132_respond { |
| u8 header; |
| u8 address; |
| u32 *value; |
| int *result; |
| struct completion wait_completion; |
| }; |
| struct u132_target { |
| void *endp; |
| struct urb *urb; |
| int toggle_bits; |
| int error_count; |
| int condition_code; |
| int repeat_number; |
| int halted; |
| int skipped; |
| int actual; |
| int non_null; |
| int active; |
| int abandoning; |
| void (*callback) (void *endp, struct urb *urb, u8 *buf, int len, |
| int toggle_bits, int error_count, int condition_code, |
| int repeat_number, int halted, int skipped, int actual, |
| int non_null); |
| }; |
| /* Structure to hold all of our device specific stuff*/ |
| struct usb_ftdi { |
| struct list_head ftdi_list; |
| struct mutex u132_lock; |
| int command_next; |
| int command_head; |
| struct u132_command command[COMMAND_SIZE]; |
| int respond_next; |
| int respond_head; |
| struct u132_respond respond[RESPOND_SIZE]; |
| struct u132_target target[4]; |
| char device_name[16]; |
| unsigned synchronized:1; |
| unsigned enumerated:1; |
| unsigned registered:1; |
| unsigned initialized:1; |
| unsigned card_ejected:1; |
| int function; |
| int sequence_num; |
| int disconnected; |
| int gone_away; |
| int stuck_status; |
| int status_queue_delay; |
| struct semaphore sw_lock; |
| struct usb_device *udev; |
| struct usb_interface *interface; |
| struct usb_class_driver *class; |
| struct delayed_work status_work; |
| struct delayed_work command_work; |
| struct delayed_work respond_work; |
| struct u132_platform_data platform_data; |
| struct resource resources[0]; |
| struct platform_device platform_dev; |
| unsigned char *bulk_in_buffer; |
| size_t bulk_in_size; |
| size_t bulk_in_last; |
| size_t bulk_in_left; |
| __u8 bulk_in_endpointAddr; |
| __u8 bulk_out_endpointAddr; |
| struct kref kref; |
| u32 controlreg; |
| u8 response[4 + 1024]; |
| int expected; |
| int received; |
| int ed_found; |
| }; |
| #define kref_to_usb_ftdi(d) container_of(d, struct usb_ftdi, kref) |
| #define platform_device_to_usb_ftdi(d) container_of(d, struct usb_ftdi, \ |
| platform_dev) |
| static struct usb_driver ftdi_elan_driver; |
| static void ftdi_elan_delete(struct kref *kref) |
| { |
| struct usb_ftdi *ftdi = kref_to_usb_ftdi(kref); |
| dev_warn(&ftdi->udev->dev, "FREEING ftdi=%p\n", ftdi); |
| usb_put_dev(ftdi->udev); |
| ftdi->disconnected += 1; |
| mutex_lock(&ftdi_module_lock); |
| list_del_init(&ftdi->ftdi_list); |
| ftdi_instances -= 1; |
| mutex_unlock(&ftdi_module_lock); |
| kfree(ftdi->bulk_in_buffer); |
| ftdi->bulk_in_buffer = NULL; |
| } |
| |
| static void ftdi_elan_put_kref(struct usb_ftdi *ftdi) |
| { |
| kref_put(&ftdi->kref, ftdi_elan_delete); |
| } |
| |
| static void ftdi_elan_get_kref(struct usb_ftdi *ftdi) |
| { |
| kref_get(&ftdi->kref); |
| } |
| |
| static void ftdi_elan_init_kref(struct usb_ftdi *ftdi) |
| { |
| kref_init(&ftdi->kref); |
| } |
| |
| static void ftdi_status_requeue_work(struct usb_ftdi *ftdi, unsigned int delta) |
| { |
| if (!queue_delayed_work(status_queue, &ftdi->status_work, delta)) |
| kref_put(&ftdi->kref, ftdi_elan_delete); |
| } |
| |
| static void ftdi_status_queue_work(struct usb_ftdi *ftdi, unsigned int delta) |
| { |
| if (queue_delayed_work(status_queue, &ftdi->status_work, delta)) |
| kref_get(&ftdi->kref); |
| } |
| |
| static void ftdi_status_cancel_work(struct usb_ftdi *ftdi) |
| { |
| if (cancel_delayed_work(&ftdi->status_work)) |
| kref_put(&ftdi->kref, ftdi_elan_delete); |
| } |
| |
| static void ftdi_command_requeue_work(struct usb_ftdi *ftdi, unsigned int delta) |
| { |
| if (!queue_delayed_work(command_queue, &ftdi->command_work, delta)) |
| kref_put(&ftdi->kref, ftdi_elan_delete); |
| } |
| |
| static void ftdi_command_queue_work(struct usb_ftdi *ftdi, unsigned int delta) |
| { |
| if (queue_delayed_work(command_queue, &ftdi->command_work, delta)) |
| kref_get(&ftdi->kref); |
| } |
| |
| static void ftdi_command_cancel_work(struct usb_ftdi *ftdi) |
| { |
| if (cancel_delayed_work(&ftdi->command_work)) |
| kref_put(&ftdi->kref, ftdi_elan_delete); |
| } |
| |
| static void ftdi_response_requeue_work(struct usb_ftdi *ftdi, |
| unsigned int delta) |
| { |
| if (!queue_delayed_work(respond_queue, &ftdi->respond_work, delta)) |
| kref_put(&ftdi->kref, ftdi_elan_delete); |
| } |
| |
| static void ftdi_respond_queue_work(struct usb_ftdi *ftdi, unsigned int delta) |
| { |
| if (queue_delayed_work(respond_queue, &ftdi->respond_work, delta)) |
| kref_get(&ftdi->kref); |
| } |
| |
| static void ftdi_response_cancel_work(struct usb_ftdi *ftdi) |
| { |
| if (cancel_delayed_work(&ftdi->respond_work)) |
| kref_put(&ftdi->kref, ftdi_elan_delete); |
| } |
| |
| void ftdi_elan_gone_away(struct platform_device *pdev) |
| { |
| struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev); |
| ftdi->gone_away += 1; |
| ftdi_elan_put_kref(ftdi); |
| } |
| |
| |
| EXPORT_SYMBOL_GPL(ftdi_elan_gone_away); |
| static void ftdi_release_platform_dev(struct device *dev) |
| { |
| dev->parent = NULL; |
| } |
| |
| static void ftdi_elan_do_callback(struct usb_ftdi *ftdi, |
| struct u132_target *target, u8 *buffer, int length); |
| static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi); |
| static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi); |
| static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi); |
| static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi); |
| static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi); |
| static int ftdi_elan_synchronize(struct usb_ftdi *ftdi); |
| static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi); |
| static int ftdi_elan_command_engine(struct usb_ftdi *ftdi); |
| static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi); |
| static int ftdi_elan_hcd_init(struct usb_ftdi *ftdi) |
| { |
| int result; |
| if (ftdi->platform_dev.dev.parent) |
| return -EBUSY; |
| ftdi_elan_get_kref(ftdi); |
| ftdi->platform_data.potpg = 100; |
| ftdi->platform_data.reset = NULL; |
| ftdi->platform_dev.id = ftdi->sequence_num; |
| ftdi->platform_dev.resource = ftdi->resources; |
| ftdi->platform_dev.num_resources = ARRAY_SIZE(ftdi->resources); |
| ftdi->platform_dev.dev.platform_data = &ftdi->platform_data; |
| ftdi->platform_dev.dev.parent = NULL; |
| ftdi->platform_dev.dev.release = ftdi_release_platform_dev; |
| ftdi->platform_dev.dev.dma_mask = NULL; |
| snprintf(ftdi->device_name, sizeof(ftdi->device_name), "u132_hcd"); |
| ftdi->platform_dev.name = ftdi->device_name; |
| dev_info(&ftdi->udev->dev, "requesting module '%s'\n", "u132_hcd"); |
| request_module("u132_hcd"); |
| dev_info(&ftdi->udev->dev, "registering '%s'\n", |
| ftdi->platform_dev.name); |
| result = platform_device_register(&ftdi->platform_dev); |
| return result; |
| } |
| |
| static void ftdi_elan_abandon_completions(struct usb_ftdi *ftdi) |
| { |
| mutex_lock(&ftdi->u132_lock); |
| while (ftdi->respond_next > ftdi->respond_head) { |
| struct u132_respond *respond = &ftdi->respond[RESPOND_MASK & |
| ftdi->respond_head++]; |
| *respond->result = -ESHUTDOWN; |
| *respond->value = 0; |
| complete(&respond->wait_completion); |
| } mutex_unlock(&ftdi->u132_lock); |
| } |
| |
| static void ftdi_elan_abandon_targets(struct usb_ftdi *ftdi) |
| { |
| int ed_number = 4; |
| mutex_lock(&ftdi->u132_lock); |
| while (ed_number-- > 0) { |
| struct u132_target *target = &ftdi->target[ed_number]; |
| if (target->active == 1) { |
| target->condition_code = TD_DEVNOTRESP; |
| mutex_unlock(&ftdi->u132_lock); |
| ftdi_elan_do_callback(ftdi, target, NULL, 0); |
| mutex_lock(&ftdi->u132_lock); |
| } |
| } |
| ftdi->received = 0; |
| ftdi->expected = 4; |
| ftdi->ed_found = 0; |
| mutex_unlock(&ftdi->u132_lock); |
| } |
| |
| static void ftdi_elan_flush_targets(struct usb_ftdi *ftdi) |
| { |
| int ed_number = 4; |
| mutex_lock(&ftdi->u132_lock); |
| while (ed_number-- > 0) { |
| struct u132_target *target = &ftdi->target[ed_number]; |
| target->abandoning = 1; |
| wait_1:if (target->active == 1) { |
| int command_size = ftdi->command_next - |
| ftdi->command_head; |
| if (command_size < COMMAND_SIZE) { |
| struct u132_command *command = &ftdi->command[ |
| COMMAND_MASK & ftdi->command_next]; |
| command->header = 0x80 | (ed_number << 5) | 0x4; |
| command->length = 0x00; |
| command->address = 0x00; |
| command->width = 0x00; |
| command->follows = 0; |
| command->value = 0; |
| command->buffer = &command->value; |
| ftdi->command_next += 1; |
| ftdi_elan_kick_command_queue(ftdi); |
| } else { |
| mutex_unlock(&ftdi->u132_lock); |
| msleep(100); |
| mutex_lock(&ftdi->u132_lock); |
| goto wait_1; |
| } |
| } |
| wait_2:if (target->active == 1) { |
| int command_size = ftdi->command_next - |
| ftdi->command_head; |
| if (command_size < COMMAND_SIZE) { |
| struct u132_command *command = &ftdi->command[ |
| COMMAND_MASK & ftdi->command_next]; |
| command->header = 0x90 | (ed_number << 5); |
| command->length = 0x00; |
| command->address = 0x00; |
| command->width = 0x00; |
| command->follows = 0; |
| command->value = 0; |
| command->buffer = &command->value; |
| ftdi->command_next += 1; |
| ftdi_elan_kick_command_queue(ftdi); |
| } else { |
| mutex_unlock(&ftdi->u132_lock); |
| msleep(100); |
| mutex_lock(&ftdi->u132_lock); |
| goto wait_2; |
| } |
| } |
| } |
| ftdi->received = 0; |
| ftdi->expected = 4; |
| ftdi->ed_found = 0; |
| mutex_unlock(&ftdi->u132_lock); |
| } |
| |
| static void ftdi_elan_cancel_targets(struct usb_ftdi *ftdi) |
| { |
| int ed_number = 4; |
| mutex_lock(&ftdi->u132_lock); |
| while (ed_number-- > 0) { |
| struct u132_target *target = &ftdi->target[ed_number]; |
| target->abandoning = 1; |
| wait:if (target->active == 1) { |
| int command_size = ftdi->command_next - |
| ftdi->command_head; |
| if (command_size < COMMAND_SIZE) { |
| struct u132_command *command = &ftdi->command[ |
| COMMAND_MASK & ftdi->command_next]; |
| command->header = 0x80 | (ed_number << 5) | 0x4; |
| command->length = 0x00; |
| command->address = 0x00; |
| command->width = 0x00; |
| command->follows = 0; |
| command->value = 0; |
| command->buffer = &command->value; |
| ftdi->command_next += 1; |
| ftdi_elan_kick_command_queue(ftdi); |
| } else { |
| mutex_unlock(&ftdi->u132_lock); |
| msleep(100); |
| mutex_lock(&ftdi->u132_lock); |
| goto wait; |
| } |
| } |
| } |
| ftdi->received = 0; |
| ftdi->expected = 4; |
| ftdi->ed_found = 0; |
| mutex_unlock(&ftdi->u132_lock); |
| } |
| |
| static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi) |
| { |
| ftdi_command_queue_work(ftdi, 0); |
| } |
| |
| static void ftdi_elan_command_work(struct work_struct *work) |
| { |
| struct usb_ftdi *ftdi = |
| container_of(work, struct usb_ftdi, command_work.work); |
| |
| if (ftdi->disconnected > 0) { |
| ftdi_elan_put_kref(ftdi); |
| return; |
| } else { |
| int retval = ftdi_elan_command_engine(ftdi); |
| if (retval == -ESHUTDOWN) { |
| ftdi->disconnected += 1; |
| } else if (retval == -ENODEV) { |
| ftdi->disconnected += 1; |
| } else if (retval) |
| dev_err(&ftdi->udev->dev, "command error %d\n", retval); |
| ftdi_command_requeue_work(ftdi, msecs_to_jiffies(10)); |
| return; |
| } |
| } |
| |
| static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi) |
| { |
| ftdi_respond_queue_work(ftdi, 0); |
| } |
| |
| static void ftdi_elan_respond_work(struct work_struct *work) |
| { |
| struct usb_ftdi *ftdi = |
| container_of(work, struct usb_ftdi, respond_work.work); |
| if (ftdi->disconnected > 0) { |
| ftdi_elan_put_kref(ftdi); |
| return; |
| } else { |
| int retval = ftdi_elan_respond_engine(ftdi); |
| if (retval == 0) { |
| } else if (retval == -ESHUTDOWN) { |
| ftdi->disconnected += 1; |
| } else if (retval == -ENODEV) { |
| ftdi->disconnected += 1; |
| } else if (retval == -EILSEQ) { |
| ftdi->disconnected += 1; |
| } else { |
| ftdi->disconnected += 1; |
| dev_err(&ftdi->udev->dev, "respond error %d\n", retval); |
| } |
| if (ftdi->disconnected > 0) { |
| ftdi_elan_abandon_completions(ftdi); |
| ftdi_elan_abandon_targets(ftdi); |
| } |
| ftdi_response_requeue_work(ftdi, msecs_to_jiffies(10)); |
| return; |
| } |
| } |
| |
| |
| /* |
| * the sw_lock is initially held and will be freed |
| * after the FTDI has been synchronized |
| * |
| */ |
| static void ftdi_elan_status_work(struct work_struct *work) |
| { |
| struct usb_ftdi *ftdi = |
| container_of(work, struct usb_ftdi, status_work.work); |
| int work_delay_in_msec = 0; |
| if (ftdi->disconnected > 0) { |
| ftdi_elan_put_kref(ftdi); |
| return; |
| } else if (ftdi->synchronized == 0) { |
| down(&ftdi->sw_lock); |
| if (ftdi_elan_synchronize(ftdi) == 0) { |
| ftdi->synchronized = 1; |
| ftdi_command_queue_work(ftdi, 1); |
| ftdi_respond_queue_work(ftdi, 1); |
| up(&ftdi->sw_lock); |
| work_delay_in_msec = 100; |
| } else { |
| dev_err(&ftdi->udev->dev, "synchronize failed\n"); |
| up(&ftdi->sw_lock); |
| work_delay_in_msec = 10 *1000; |
| } |
| } else if (ftdi->stuck_status > 0) { |
| if (ftdi_elan_stuck_waiting(ftdi) == 0) { |
| ftdi->stuck_status = 0; |
| ftdi->synchronized = 0; |
| } else if ((ftdi->stuck_status++ % 60) == 1) { |
| dev_err(&ftdi->udev->dev, "WRONG type of card inserted " |
| "- please remove\n"); |
| } else |
| dev_err(&ftdi->udev->dev, "WRONG type of card inserted " |
| "- checked %d times\n", ftdi->stuck_status); |
| work_delay_in_msec = 100; |
| } else if (ftdi->enumerated == 0) { |
| if (ftdi_elan_enumeratePCI(ftdi) == 0) { |
| ftdi->enumerated = 1; |
| work_delay_in_msec = 250; |
| } else |
| work_delay_in_msec = 1000; |
| } else if (ftdi->initialized == 0) { |
| if (ftdi_elan_setupOHCI(ftdi) == 0) { |
| ftdi->initialized = 1; |
| work_delay_in_msec = 500; |
| } else { |
| dev_err(&ftdi->udev->dev, "initialized failed - trying " |
| "again in 10 seconds\n"); |
| work_delay_in_msec = 1 *1000; |
| } |
| } else if (ftdi->registered == 0) { |
| work_delay_in_msec = 10; |
| if (ftdi_elan_hcd_init(ftdi) == 0) { |
| ftdi->registered = 1; |
| } else |
| dev_err(&ftdi->udev->dev, "register failed\n"); |
| work_delay_in_msec = 250; |
| } else { |
| if (ftdi_elan_checkingPCI(ftdi) == 0) { |
| work_delay_in_msec = 250; |
| } else if (ftdi->controlreg & 0x00400000) { |
| if (ftdi->gone_away > 0) { |
| dev_err(&ftdi->udev->dev, "PCI device eject con" |
| "firmed platform_dev.dev.parent=%p plat" |
| "form_dev.dev=%p\n", |
| ftdi->platform_dev.dev.parent, |
| &ftdi->platform_dev.dev); |
| platform_device_unregister(&ftdi->platform_dev); |
| ftdi->platform_dev.dev.parent = NULL; |
| ftdi->registered = 0; |
| ftdi->enumerated = 0; |
| ftdi->card_ejected = 0; |
| ftdi->initialized = 0; |
| ftdi->gone_away = 0; |
| } else |
| ftdi_elan_flush_targets(ftdi); |
| work_delay_in_msec = 250; |
| } else { |
| dev_err(&ftdi->udev->dev, "PCI device has disappeared\n" |
| ); |
| ftdi_elan_cancel_targets(ftdi); |
| work_delay_in_msec = 500; |
| ftdi->enumerated = 0; |
| ftdi->initialized = 0; |
| } |
| } |
| if (ftdi->disconnected > 0) { |
| ftdi_elan_put_kref(ftdi); |
| return; |
| } else { |
| ftdi_status_requeue_work(ftdi, |
| msecs_to_jiffies(work_delay_in_msec)); |
| return; |
| } |
| } |
| |
| |
| /* |
| * file_operations for the jtag interface |
| * |
| * the usage count for the device is incremented on open() |
| * and decremented on release() |
| */ |
| static int ftdi_elan_open(struct inode *inode, struct file *file) |
| { |
| int subminor; |
| struct usb_interface *interface; |
| |
| subminor = iminor(inode); |
| interface = usb_find_interface(&ftdi_elan_driver, subminor); |
| |
| if (!interface) { |
| printk(KERN_ERR "can't find device for minor %d\n", subminor); |
| return -ENODEV; |
| } else { |
| struct usb_ftdi *ftdi = usb_get_intfdata(interface); |
| if (!ftdi) { |
| return -ENODEV; |
| } else { |
| if (down_interruptible(&ftdi->sw_lock)) { |
| return -EINTR; |
| } else { |
| ftdi_elan_get_kref(ftdi); |
| file->private_data = ftdi; |
| return 0; |
| } |
| } |
| } |
| } |
| |
| static int ftdi_elan_release(struct inode *inode, struct file *file) |
| { |
| struct usb_ftdi *ftdi = file->private_data; |
| if (ftdi == NULL) |
| return -ENODEV; |
| up(&ftdi->sw_lock); /* decrement the count on our device */ |
| ftdi_elan_put_kref(ftdi); |
| return 0; |
| } |
| |
| |
| /* |
| * |
| * blocking bulk reads are used to get data from the device |
| * |
| */ |
| static ssize_t ftdi_elan_read(struct file *file, char __user *buffer, |
| size_t count, loff_t *ppos) |
| { |
| char data[30 *3 + 4]; |
| char *d = data; |
| int m = (sizeof(data) - 1) / 3; |
| int bytes_read = 0; |
| int retry_on_empty = 10; |
| int retry_on_timeout = 5; |
| struct usb_ftdi *ftdi = file->private_data; |
| if (ftdi->disconnected > 0) { |
| return -ENODEV; |
| } |
| data[0] = 0; |
| have:if (ftdi->bulk_in_left > 0) { |
| if (count-- > 0) { |
| char *p = ++ftdi->bulk_in_last + ftdi->bulk_in_buffer; |
| ftdi->bulk_in_left -= 1; |
| if (bytes_read < m) { |
| d += sprintf(d, " %02X", 0x000000FF & *p); |
| } else if (bytes_read > m) { |
| } else |
| d += sprintf(d, " .."); |
| if (copy_to_user(buffer++, p, 1)) { |
| return -EFAULT; |
| } else { |
| bytes_read += 1; |
| goto have; |
| } |
| } else |
| return bytes_read; |
| } |
| more:if (count > 0) { |
| int packet_bytes = 0; |
| int retval = usb_bulk_msg(ftdi->udev, |
| usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr), |
| ftdi->bulk_in_buffer, ftdi->bulk_in_size, |
| &packet_bytes, 50); |
| if (packet_bytes > 2) { |
| ftdi->bulk_in_left = packet_bytes - 2; |
| ftdi->bulk_in_last = 1; |
| goto have; |
| } else if (retval == -ETIMEDOUT) { |
| if (retry_on_timeout-- > 0) { |
| goto more; |
| } else if (bytes_read > 0) { |
| return bytes_read; |
| } else |
| return retval; |
| } else if (retval == 0) { |
| if (retry_on_empty-- > 0) { |
| goto more; |
| } else |
| return bytes_read; |
| } else |
| return retval; |
| } else |
| return bytes_read; |
| } |
| |
| static void ftdi_elan_write_bulk_callback(struct urb *urb) |
| { |
| struct usb_ftdi *ftdi = urb->context; |
| int status = urb->status; |
| |
| if (status && !(status == -ENOENT || status == -ECONNRESET || |
| status == -ESHUTDOWN)) { |
| dev_err(&ftdi->udev->dev, "urb=%p write bulk status received: %" |
| "d\n", urb, status); |
| } |
| usb_free_coherent(urb->dev, urb->transfer_buffer_length, |
| urb->transfer_buffer, urb->transfer_dma); |
| } |
| |
| static int fill_buffer_with_all_queued_commands(struct usb_ftdi *ftdi, |
| char *buf, int command_size, int total_size) |
| { |
| int ed_commands = 0; |
| int b = 0; |
| int I = command_size; |
| int i = ftdi->command_head; |
| while (I-- > 0) { |
| struct u132_command *command = &ftdi->command[COMMAND_MASK & |
| i++]; |
| int F = command->follows; |
| u8 *f = command->buffer; |
| if (command->header & 0x80) { |
| ed_commands |= 1 << (0x3 & (command->header >> 5)); |
| } |
| buf[b++] = command->header; |
| buf[b++] = (command->length >> 0) & 0x00FF; |
| buf[b++] = (command->length >> 8) & 0x00FF; |
| buf[b++] = command->address; |
| buf[b++] = command->width; |
| while (F-- > 0) { |
| buf[b++] = *f++; |
| } |
| } |
| return ed_commands; |
| } |
| |
| static int ftdi_elan_total_command_size(struct usb_ftdi *ftdi, int command_size) |
| { |
| int total_size = 0; |
| int I = command_size; |
| int i = ftdi->command_head; |
| while (I-- > 0) { |
| struct u132_command *command = &ftdi->command[COMMAND_MASK & |
| i++]; |
| total_size += 5 + command->follows; |
| } return total_size; |
| } |
| |
| static int ftdi_elan_command_engine(struct usb_ftdi *ftdi) |
| { |
| int retval; |
| char *buf; |
| int ed_commands; |
| int total_size; |
| struct urb *urb; |
| int command_size = ftdi->command_next - ftdi->command_head; |
| if (command_size == 0) |
| return 0; |
| total_size = ftdi_elan_total_command_size(ftdi, command_size); |
| urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!urb) { |
| dev_err(&ftdi->udev->dev, "could not get a urb to write %d comm" |
| "ands totaling %d bytes to the Uxxx\n", command_size, |
| total_size); |
| return -ENOMEM; |
| } |
| buf = usb_alloc_coherent(ftdi->udev, total_size, GFP_KERNEL, |
| &urb->transfer_dma); |
| if (!buf) { |
| dev_err(&ftdi->udev->dev, "could not get a buffer to write %d c" |
| "ommands totaling %d bytes to the Uxxx\n", command_size, |
| total_size); |
| usb_free_urb(urb); |
| return -ENOMEM; |
| } |
| ed_commands = fill_buffer_with_all_queued_commands(ftdi, buf, |
| command_size, total_size); |
| usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev, |
| ftdi->bulk_out_endpointAddr), buf, total_size, |
| ftdi_elan_write_bulk_callback, ftdi); |
| urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| if (ed_commands) { |
| char diag[40 *3 + 4]; |
| char *d = diag; |
| int m = total_size; |
| u8 *c = buf; |
| int s = (sizeof(diag) - 1) / 3; |
| diag[0] = 0; |
| while (s-- > 0 && m-- > 0) { |
| if (s > 0 || m == 0) { |
| d += sprintf(d, " %02X", *c++); |
| } else |
| d += sprintf(d, " .."); |
| } |
| } |
| retval = usb_submit_urb(urb, GFP_KERNEL); |
| if (retval) { |
| dev_err(&ftdi->udev->dev, "failed %d to submit urb %p to write " |
| "%d commands totaling %d bytes to the Uxxx\n", retval, |
| urb, command_size, total_size); |
| usb_free_coherent(ftdi->udev, total_size, buf, urb->transfer_dma); |
| usb_free_urb(urb); |
| return retval; |
| } |
| usb_free_urb(urb); /* release our reference to this urb, |
| the USB core will eventually free it entirely */ |
| ftdi->command_head += command_size; |
| ftdi_elan_kick_respond_queue(ftdi); |
| return 0; |
| } |
| |
| static void ftdi_elan_do_callback(struct usb_ftdi *ftdi, |
| struct u132_target *target, u8 *buffer, int length) |
| { |
| struct urb *urb = target->urb; |
| int halted = target->halted; |
| int skipped = target->skipped; |
| int actual = target->actual; |
| int non_null = target->non_null; |
| int toggle_bits = target->toggle_bits; |
| int error_count = target->error_count; |
| int condition_code = target->condition_code; |
| int repeat_number = target->repeat_number; |
| void (*callback) (void *, struct urb *, u8 *, int, int, int, int, int, |
| int, int, int, int) = target->callback; |
| target->active -= 1; |
| target->callback = NULL; |
| (*callback) (target->endp, urb, buffer, length, toggle_bits, |
| error_count, condition_code, repeat_number, halted, skipped, |
| actual, non_null); |
| } |
| |
| static char *have_ed_set_response(struct usb_ftdi *ftdi, |
| struct u132_target *target, u16 ed_length, int ed_number, int ed_type, |
| char *b) |
| { |
| int payload = (ed_length >> 0) & 0x07FF; |
| mutex_lock(&ftdi->u132_lock); |
| target->actual = 0; |
| target->non_null = (ed_length >> 15) & 0x0001; |
| target->repeat_number = (ed_length >> 11) & 0x000F; |
| if (ed_type == 0x02) { |
| if (payload == 0 || target->abandoning > 0) { |
| target->abandoning = 0; |
| mutex_unlock(&ftdi->u132_lock); |
| ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response, |
| payload); |
| ftdi->received = 0; |
| ftdi->expected = 4; |
| ftdi->ed_found = 0; |
| return ftdi->response; |
| } else { |
| ftdi->expected = 4 + payload; |
| ftdi->ed_found = 1; |
| mutex_unlock(&ftdi->u132_lock); |
| return b; |
| } |
| } else if (ed_type == 0x03) { |
| if (payload == 0 || target->abandoning > 0) { |
| target->abandoning = 0; |
| mutex_unlock(&ftdi->u132_lock); |
| ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response, |
| payload); |
| ftdi->received = 0; |
| ftdi->expected = 4; |
| ftdi->ed_found = 0; |
| return ftdi->response; |
| } else { |
| ftdi->expected = 4 + payload; |
| ftdi->ed_found = 1; |
| mutex_unlock(&ftdi->u132_lock); |
| return b; |
| } |
| } else if (ed_type == 0x01) { |
| target->abandoning = 0; |
| mutex_unlock(&ftdi->u132_lock); |
| ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response, |
| payload); |
| ftdi->received = 0; |
| ftdi->expected = 4; |
| ftdi->ed_found = 0; |
| return ftdi->response; |
| } else { |
| target->abandoning = 0; |
| mutex_unlock(&ftdi->u132_lock); |
| ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response, |
| payload); |
| ftdi->received = 0; |
| ftdi->expected = 4; |
| ftdi->ed_found = 0; |
| return ftdi->response; |
| } |
| } |
| |
| static char *have_ed_get_response(struct usb_ftdi *ftdi, |
| struct u132_target *target, u16 ed_length, int ed_number, int ed_type, |
| char *b) |
| { |
| mutex_lock(&ftdi->u132_lock); |
| target->condition_code = TD_DEVNOTRESP; |
| target->actual = (ed_length >> 0) & 0x01FF; |
| target->non_null = (ed_length >> 15) & 0x0001; |
| target->repeat_number = (ed_length >> 11) & 0x000F; |
| mutex_unlock(&ftdi->u132_lock); |
| if (target->active) |
| ftdi_elan_do_callback(ftdi, target, NULL, 0); |
| target->abandoning = 0; |
| ftdi->received = 0; |
| ftdi->expected = 4; |
| ftdi->ed_found = 0; |
| return ftdi->response; |
| } |
| |
| |
| /* |
| * The engine tries to empty the FTDI fifo |
| * |
| * all responses found in the fifo data are dispatched thus |
| * the response buffer can only ever hold a maximum sized |
| * response from the Uxxx. |
| * |
| */ |
| static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi) |
| { |
| u8 *b = ftdi->response + ftdi->received; |
| int bytes_read = 0; |
| int retry_on_empty = 1; |
| int retry_on_timeout = 3; |
| int empty_packets = 0; |
| read:{ |
| int packet_bytes = 0; |
| int retval = usb_bulk_msg(ftdi->udev, |
| usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr), |
| ftdi->bulk_in_buffer, ftdi->bulk_in_size, |
| &packet_bytes, 500); |
| char diag[30 *3 + 4]; |
| char *d = diag; |
| int m = packet_bytes; |
| u8 *c = ftdi->bulk_in_buffer; |
| int s = (sizeof(diag) - 1) / 3; |
| diag[0] = 0; |
| while (s-- > 0 && m-- > 0) { |
| if (s > 0 || m == 0) { |
| d += sprintf(d, " %02X", *c++); |
| } else |
| d += sprintf(d, " .."); |
| } |
| if (packet_bytes > 2) { |
| ftdi->bulk_in_left = packet_bytes - 2; |
| ftdi->bulk_in_last = 1; |
| goto have; |
| } else if (retval == -ETIMEDOUT) { |
| if (retry_on_timeout-- > 0) { |
| dev_err(&ftdi->udev->dev, "TIMED OUT with packe" |
| "t_bytes = %d with total %d bytes%s\n", |
| packet_bytes, bytes_read, diag); |
| goto more; |
| } else if (bytes_read > 0) { |
| dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n", |
| bytes_read, diag); |
| return -ENOMEM; |
| } else { |
| dev_err(&ftdi->udev->dev, "TIMED OUT with packe" |
| "t_bytes = %d with total %d bytes%s\n", |
| packet_bytes, bytes_read, diag); |
| return -ENOMEM; |
| } |
| } else if (retval == -EILSEQ) { |
| dev_err(&ftdi->udev->dev, "error = %d with packet_bytes" |
| " = %d with total %d bytes%s\n", retval, |
| packet_bytes, bytes_read, diag); |
| return retval; |
| } else if (retval) { |
| dev_err(&ftdi->udev->dev, "error = %d with packet_bytes" |
| " = %d with total %d bytes%s\n", retval, |
| packet_bytes, bytes_read, diag); |
| return retval; |
| } else if (packet_bytes == 2) { |
| unsigned char s0 = ftdi->bulk_in_buffer[0]; |
| unsigned char s1 = ftdi->bulk_in_buffer[1]; |
| empty_packets += 1; |
| if (s0 == 0x31 && s1 == 0x60) { |
| if (retry_on_empty-- > 0) { |
| goto more; |
| } else |
| return 0; |
| } else if (s0 == 0x31 && s1 == 0x00) { |
| if (retry_on_empty-- > 0) { |
| goto more; |
| } else |
| return 0; |
| } else { |
| if (retry_on_empty-- > 0) { |
| goto more; |
| } else |
| return 0; |
| } |
| } else if (packet_bytes == 1) { |
| if (retry_on_empty-- > 0) { |
| goto more; |
| } else |
| return 0; |
| } else { |
| if (retry_on_empty-- > 0) { |
| goto more; |
| } else |
| return 0; |
| } |
| } |
| more:{ |
| goto read; |
| } |
| have:if (ftdi->bulk_in_left > 0) { |
| u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last]; |
| bytes_read += 1; |
| ftdi->bulk_in_left -= 1; |
| if (ftdi->received == 0 && c == 0xFF) { |
| goto have; |
| } else |
| *b++ = c; |
| if (++ftdi->received < ftdi->expected) { |
| goto have; |
| } else if (ftdi->ed_found) { |
| int ed_number = (ftdi->response[0] >> 5) & 0x03; |
| u16 ed_length = (ftdi->response[2] << 8) | |
| ftdi->response[1]; |
| struct u132_target *target = &ftdi->target[ed_number]; |
| int payload = (ed_length >> 0) & 0x07FF; |
| char diag[30 *3 + 4]; |
| char *d = diag; |
| int m = payload; |
| u8 *c = 4 + ftdi->response; |
| int s = (sizeof(diag) - 1) / 3; |
| diag[0] = 0; |
| while (s-- > 0 && m-- > 0) { |
| if (s > 0 || m == 0) { |
| d += sprintf(d, " %02X", *c++); |
| } else |
| d += sprintf(d, " .."); |
| } |
| ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response, |
| payload); |
| ftdi->received = 0; |
| ftdi->expected = 4; |
| ftdi->ed_found = 0; |
| b = ftdi->response; |
| goto have; |
| } else if (ftdi->expected == 8) { |
| u8 buscmd; |
| int respond_head = ftdi->respond_head++; |
| struct u132_respond *respond = &ftdi->respond[ |
| RESPOND_MASK & respond_head]; |
| u32 data = ftdi->response[7]; |
| data <<= 8; |
| data |= ftdi->response[6]; |
| data <<= 8; |
| data |= ftdi->response[5]; |
| data <<= 8; |
| data |= ftdi->response[4]; |
| *respond->value = data; |
| *respond->result = 0; |
| complete(&respond->wait_completion); |
| ftdi->received = 0; |
| ftdi->expected = 4; |
| ftdi->ed_found = 0; |
| b = ftdi->response; |
| buscmd = (ftdi->response[0] >> 0) & 0x0F; |
| if (buscmd == 0x00) { |
| } else if (buscmd == 0x02) { |
| } else if (buscmd == 0x06) { |
| } else if (buscmd == 0x0A) { |
| } else |
| dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) va" |
| "lue = %08X\n", buscmd, data); |
| goto have; |
| } else { |
| if ((ftdi->response[0] & 0x80) == 0x00) { |
| ftdi->expected = 8; |
| goto have; |
| } else { |
| int ed_number = (ftdi->response[0] >> 5) & 0x03; |
| int ed_type = (ftdi->response[0] >> 0) & 0x03; |
| u16 ed_length = (ftdi->response[2] << 8) | |
| ftdi->response[1]; |
| struct u132_target *target = &ftdi->target[ |
| ed_number]; |
| target->halted = (ftdi->response[0] >> 3) & |
| 0x01; |
| target->skipped = (ftdi->response[0] >> 2) & |
| 0x01; |
| target->toggle_bits = (ftdi->response[3] >> 6) |
| & 0x03; |
| target->error_count = (ftdi->response[3] >> 4) |
| & 0x03; |
| target->condition_code = (ftdi->response[ |
| 3] >> 0) & 0x0F; |
| if ((ftdi->response[0] & 0x10) == 0x00) { |
| b = have_ed_set_response(ftdi, target, |
| ed_length, ed_number, ed_type, |
| b); |
| goto have; |
| } else { |
| b = have_ed_get_response(ftdi, target, |
| ed_length, ed_number, ed_type, |
| b); |
| goto have; |
| } |
| } |
| } |
| } else |
| goto more; |
| } |
| |
| |
| /* |
| * create a urb, and a buffer for it, and copy the data to the urb |
| * |
| */ |
| static ssize_t ftdi_elan_write(struct file *file, |
| const char __user *user_buffer, size_t count, |
| loff_t *ppos) |
| { |
| int retval = 0; |
| struct urb *urb; |
| char *buf; |
| struct usb_ftdi *ftdi = file->private_data; |
| |
| if (ftdi->disconnected > 0) { |
| return -ENODEV; |
| } |
| if (count == 0) { |
| goto exit; |
| } |
| urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!urb) { |
| retval = -ENOMEM; |
| goto error_1; |
| } |
| buf = usb_alloc_coherent(ftdi->udev, count, GFP_KERNEL, |
| &urb->transfer_dma); |
| if (!buf) { |
| retval = -ENOMEM; |
| goto error_2; |
| } |
| if (copy_from_user(buf, user_buffer, count)) { |
| retval = -EFAULT; |
| goto error_3; |
| } |
| usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev, |
| ftdi->bulk_out_endpointAddr), buf, count, |
| ftdi_elan_write_bulk_callback, ftdi); |
| urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| retval = usb_submit_urb(urb, GFP_KERNEL); |
| if (retval) { |
| dev_err(&ftdi->udev->dev, "failed submitting write urb, error %" |
| "d\n", retval); |
| goto error_3; |
| } |
| usb_free_urb(urb); |
| |
| exit: |
| return count; |
| error_3: |
| usb_free_coherent(ftdi->udev, count, buf, urb->transfer_dma); |
| error_2: |
| usb_free_urb(urb); |
| error_1: |
| return retval; |
| } |
| |
| static const struct file_operations ftdi_elan_fops = { |
| .owner = THIS_MODULE, |
| .llseek = no_llseek, |
| .read = ftdi_elan_read, |
| .write = ftdi_elan_write, |
| .open = ftdi_elan_open, |
| .release = ftdi_elan_release, |
| }; |
| |
| /* |
| * usb class driver info in order to get a minor number from the usb core, |
| * and to have the device registered with the driver core |
| */ |
| static struct usb_class_driver ftdi_elan_jtag_class = { |
| .name = "ftdi-%d-jtag", |
| .fops = &ftdi_elan_fops, |
| .minor_base = USB_FTDI_ELAN_MINOR_BASE, |
| }; |
| |
| /* |
| * the following definitions are for the |
| * ELAN FPGA state machgine processor that |
| * lies on the other side of the FTDI chip |
| */ |
| #define cPCIu132rd 0x0 |
| #define cPCIu132wr 0x1 |
| #define cPCIiord 0x2 |
| #define cPCIiowr 0x3 |
| #define cPCImemrd 0x6 |
| #define cPCImemwr 0x7 |
| #define cPCIcfgrd 0xA |
| #define cPCIcfgwr 0xB |
| #define cPCInull 0xF |
| #define cU132cmd_status 0x0 |
| #define cU132flash 0x1 |
| #define cPIDsetup 0x0 |
| #define cPIDout 0x1 |
| #define cPIDin 0x2 |
| #define cPIDinonce 0x3 |
| #define cCCnoerror 0x0 |
| #define cCCcrc 0x1 |
| #define cCCbitstuff 0x2 |
| #define cCCtoggle 0x3 |
| #define cCCstall 0x4 |
| #define cCCnoresp 0x5 |
| #define cCCbadpid1 0x6 |
| #define cCCbadpid2 0x7 |
| #define cCCdataoverrun 0x8 |
| #define cCCdataunderrun 0x9 |
| #define cCCbuffoverrun 0xC |
| #define cCCbuffunderrun 0xD |
| #define cCCnotaccessed 0xF |
| static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data) |
| { |
| wait:if (ftdi->disconnected > 0) { |
| return -ENODEV; |
| } else { |
| int command_size; |
| mutex_lock(&ftdi->u132_lock); |
| command_size = ftdi->command_next - ftdi->command_head; |
| if (command_size < COMMAND_SIZE) { |
| struct u132_command *command = &ftdi->command[ |
| COMMAND_MASK & ftdi->command_next]; |
| command->header = 0x00 | cPCIu132wr; |
| command->length = 0x04; |
| command->address = 0x00; |
| command->width = 0x00; |
| command->follows = 4; |
| command->value = data; |
| command->buffer = &command->value; |
| ftdi->command_next += 1; |
| ftdi_elan_kick_command_queue(ftdi); |
| mutex_unlock(&ftdi->u132_lock); |
| return 0; |
| } else { |
| mutex_unlock(&ftdi->u132_lock); |
| msleep(100); |
| goto wait; |
| } |
| } |
| } |
| |
| static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset, |
| u8 width, u32 data) |
| { |
| u8 addressofs = config_offset / 4; |
| wait:if (ftdi->disconnected > 0) { |
| return -ENODEV; |
| } else { |
| int command_size; |
| mutex_lock(&ftdi->u132_lock); |
| command_size = ftdi->command_next - ftdi->command_head; |
| if (command_size < COMMAND_SIZE) { |
| struct u132_command *command = &ftdi->command[ |
| COMMAND_MASK & ftdi->command_next]; |
| command->header = 0x00 | (cPCIcfgwr & 0x0F); |
| command->length = 0x04; |
| command->address = addressofs; |
| command->width = 0x00 | (width & 0x0F); |
| command->follows = 4; |
| command->value = data; |
| command->buffer = &command->value; |
| ftdi->command_next += 1; |
| ftdi_elan_kick_command_queue(ftdi); |
| mutex_unlock(&ftdi->u132_lock); |
| return 0; |
| } else { |
| mutex_unlock(&ftdi->u132_lock); |
| msleep(100); |
| goto wait; |
| } |
| } |
| } |
| |
| static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset, |
| u8 width, u32 data) |
| { |
| u8 addressofs = mem_offset / 4; |
| wait:if (ftdi->disconnected > 0) { |
| return -ENODEV; |
| } else { |
| int command_size; |
| mutex_lock(&ftdi->u132_lock); |
| command_size = ftdi->command_next - ftdi->command_head; |
| if (command_size < COMMAND_SIZE) { |
| struct u132_command *command = &ftdi->command[ |
| COMMAND_MASK & ftdi->command_next]; |
| command->header = 0x00 | (cPCImemwr & 0x0F); |
| command->length = 0x04; |
| command->address = addressofs; |
| command->width = 0x00 | (width & 0x0F); |
| command->follows = 4; |
| command->value = data; |
| command->buffer = &command->value; |
| ftdi->command_next += 1; |
| ftdi_elan_kick_command_queue(ftdi); |
| mutex_unlock(&ftdi->u132_lock); |
| return 0; |
| } else { |
| mutex_unlock(&ftdi->u132_lock); |
| msleep(100); |
| goto wait; |
| } |
| } |
| } |
| |
| int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset, |
| u8 width, u32 data) |
| { |
| struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev); |
| return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data); |
| } |
| |
| |
| EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem); |
| static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data) |
| { |
| wait:if (ftdi->disconnected > 0) { |
| return -ENODEV; |
| } else { |
| int command_size; |
| int respond_size; |
| mutex_lock(&ftdi->u132_lock); |
| command_size = ftdi->command_next - ftdi->command_head; |
| respond_size = ftdi->respond_next - ftdi->respond_head; |
| if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE) |
| { |
| struct u132_command *command = &ftdi->command[ |
| COMMAND_MASK & ftdi->command_next]; |
| struct u132_respond *respond = &ftdi->respond[ |
| RESPOND_MASK & ftdi->respond_next]; |
| int result = -ENODEV; |
| respond->result = &result; |
| respond->header = command->header = 0x00 | cPCIu132rd; |
| command->length = 0x04; |
| respond->address = command->address = cU132cmd_status; |
| command->width = 0x00; |
| command->follows = 0; |
| command->value = 0; |
| command->buffer = NULL; |
| respond->value = data; |
| init_completion(&respond->wait_completion); |
| ftdi->command_next += 1; |
| ftdi->respond_next += 1; |
| ftdi_elan_kick_command_queue(ftdi); |
| mutex_unlock(&ftdi->u132_lock); |
| wait_for_completion(&respond->wait_completion); |
| return result; |
| } else { |
| mutex_unlock(&ftdi->u132_lock); |
| msleep(100); |
| goto wait; |
| } |
| } |
| } |
| |
| static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset, |
| u8 width, u32 *data) |
| { |
| u8 addressofs = config_offset / 4; |
| wait:if (ftdi->disconnected > 0) { |
| return -ENODEV; |
| } else { |
| int command_size; |
| int respond_size; |
| mutex_lock(&ftdi->u132_lock); |
| command_size = ftdi->command_next - ftdi->command_head; |
| respond_size = ftdi->respond_next - ftdi->respond_head; |
| if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE) |
| { |
| struct u132_command *command = &ftdi->command[ |
| COMMAND_MASK & ftdi->command_next]; |
| struct u132_respond *respond = &ftdi->respond[ |
| RESPOND_MASK & ftdi->respond_next]; |
| int result = -ENODEV; |
| respond->result = &result; |
| respond->header = command->header = 0x00 | (cPCIcfgrd & |
| 0x0F); |
| command->length = 0x04; |
| respond->address = command->address = addressofs; |
| command->width = 0x00 | (width & 0x0F); |
| command->follows = 0; |
| command->value = 0; |
| command->buffer = NULL; |
| respond->value = data; |
| init_completion(&respond->wait_completion); |
| ftdi->command_next += 1; |
| ftdi->respond_next += 1; |
| ftdi_elan_kick_command_queue(ftdi); |
| mutex_unlock(&ftdi->u132_lock); |
| wait_for_completion(&respond->wait_completion); |
| return result; |
| } else { |
| mutex_unlock(&ftdi->u132_lock); |
| msleep(100); |
| goto wait; |
| } |
| } |
| } |
| |
| static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset, |
| u8 width, u32 *data) |
| { |
| u8 addressofs = mem_offset / 4; |
| wait:if (ftdi->disconnected > 0) { |
| return -ENODEV; |
| } else { |
| int command_size; |
| int respond_size; |
| mutex_lock(&ftdi->u132_lock); |
| command_size = ftdi->command_next - ftdi->command_head; |
| respond_size = ftdi->respond_next - ftdi->respond_head; |
| if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE) |
| { |
| struct u132_command *command = &ftdi->command[ |
| COMMAND_MASK & ftdi->command_next]; |
| struct u132_respond *respond = &ftdi->respond[ |
| RESPOND_MASK & ftdi->respond_next]; |
| int result = -ENODEV; |
| respond->result = &result; |
| respond->header = command->header = 0x00 | (cPCImemrd & |
| 0x0F); |
| command->length = 0x04; |
| respond->address = command->address = addressofs; |
| command->width = 0x00 | (width & 0x0F); |
| command->follows = 0; |
| command->value = 0; |
| command->buffer = NULL; |
| respond->value = data; |
| init_completion(&respond->wait_completion); |
| ftdi->command_next += 1; |
| ftdi->respond_next += 1; |
| ftdi_elan_kick_command_queue(ftdi); |
| mutex_unlock(&ftdi->u132_lock); |
| wait_for_completion(&respond->wait_completion); |
| return result; |
| } else { |
| mutex_unlock(&ftdi->u132_lock); |
| msleep(100); |
| goto wait; |
| } |
| } |
| } |
| |
| int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset, |
| u8 width, u32 *data) |
| { |
| struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev); |
| if (ftdi->initialized == 0) { |
| return -ENODEV; |
| } else |
| return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data); |
| } |
| |
| |
| EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem); |
| static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number, |
| void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits, |
| void (*callback) (void *endp, struct urb *urb, u8 *buf, int len, |
| int toggle_bits, int error_count, int condition_code, int repeat_number, |
| int halted, int skipped, int actual, int non_null)) |
| { |
| u8 ed = ed_number - 1; |
| wait:if (ftdi->disconnected > 0) { |
| return -ENODEV; |
| } else if (ftdi->initialized == 0) { |
| return -ENODEV; |
| } else { |
| int command_size; |
| mutex_lock(&ftdi->u132_lock); |
| command_size = ftdi->command_next - ftdi->command_head; |
| if (command_size < COMMAND_SIZE) { |
| struct u132_target *target = &ftdi->target[ed]; |
| struct u132_command *command = &ftdi->command[ |
| COMMAND_MASK & ftdi->command_next]; |
| command->header = 0x80 | (ed << 5); |
| command->length = 0x8007; |
| command->address = (toggle_bits << 6) | (ep_number << 2) |
| | (address << 0); |
| command->width = usb_maxpacket(urb->dev, urb->pipe, |
| usb_pipeout(urb->pipe)); |
| command->follows = 8; |
| command->value = 0; |
| command->buffer = urb->setup_packet; |
| target->callback = callback; |
| target->endp = endp; |
| target->urb = urb; |
| target->active = 1; |
| ftdi->command_next += 1; |
| ftdi_elan_kick_command_queue(ftdi); |
| mutex_unlock(&ftdi->u132_lock); |
| return 0; |
| } else { |
| mutex_unlock(&ftdi->u132_lock); |
| msleep(100); |
| goto wait; |
| } |
| } |
| } |
| |
| int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number, |
| void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits, |
| void (*callback) (void *endp, struct urb *urb, u8 *buf, int len, |
| int toggle_bits, int error_count, int condition_code, int repeat_number, |
| int halted, int skipped, int actual, int non_null)) |
| { |
| struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev); |
| return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address, |
| ep_number, toggle_bits, callback); |
| } |
| |
| |
| EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup); |
| static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number, |
| void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits, |
| void (*callback) (void *endp, struct urb *urb, u8 *buf, int len, |
| int toggle_bits, int error_count, int condition_code, int repeat_number, |
| int halted, int skipped, int actual, int non_null)) |
| { |
| u8 ed = ed_number - 1; |
| wait:if (ftdi->disconnected > 0) { |
| return -ENODEV; |
| } else if (ftdi->initialized == 0) { |
| return -ENODEV; |
| } else { |
| int command_size; |
| mutex_lock(&ftdi->u132_lock); |
| command_size = ftdi->command_next - ftdi->command_head; |
| if (command_size < COMMAND_SIZE) { |
| struct u132_target *target = &ftdi->target[ed]; |
| struct u132_command *command = &ftdi->command[ |
| COMMAND_MASK & ftdi->command_next]; |
| u32 remaining_length = urb->transfer_buffer_length - |
| urb->actual_length; |
| command->header = 0x82 | (ed << 5); |
| if (remaining_length == 0) { |
| command->length = 0x0000; |
| } else if (remaining_length > 1024) { |
| command->length = 0x8000 | 1023; |
| } else |
| command->length = 0x8000 | (remaining_length - |
| 1); |
| command->address = (toggle_bits << 6) | (ep_number << 2) |
| | (address << 0); |
| command->width = usb_maxpacket(urb->dev, urb->pipe, |
| usb_pipeout(urb->pipe)); |
| command->follows = 0; |
| command->value = 0; |
| command->buffer = NULL; |
| target->callback = callback; |
| target->endp = endp; |
| target->urb = urb; |
| target->active = 1; |
| ftdi->command_next += 1; |
| ftdi_elan_kick_command_queue(ftdi); |
| mutex_unlock(&ftdi->u132_lock); |
| return 0; |
| } else { |
| mutex_unlock(&ftdi->u132_lock); |
| msleep(100); |
| goto wait; |
| } |
| } |
| } |
| |
| int usb_ftdi_elan_edset_input(struct platform_device *pdev, u8 ed_number, |
| void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits, |
| void (*callback) (void *endp, struct urb *urb, u8 *buf, int len, |
| int toggle_bits, int error_count, int condition_code, int repeat_number, |
| int halted, int skipped, int actual, int non_null)) |
| { |
| struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev); |
| return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address, |
| ep_number, toggle_bits, callback); |
| } |
| |
| |
| EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input); |
| static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number, |
| void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits, |
| void (*callback) (void *endp, struct urb *urb, u8 *buf, int len, |
| int toggle_bits, int error_count, int condition_code, int repeat_number, |
| int halted, int skipped, int actual, int non_null)) |
| { |
| u8 ed = ed_number - 1; |
| wait:if (ftdi->disconnected > 0) { |
| return -ENODEV; |
| } else if (ftdi->initialized == 0) { |
| return -ENODEV; |
| } else { |
| int command_size; |
| mutex_lock(&ftdi->u132_lock); |
| command_size = ftdi->command_next - ftdi->command_head; |
| if (command_size < COMMAND_SIZE) { |
| struct u132_target *target = &ftdi->target[ed]; |
| struct u132_command *command = &ftdi->command[ |
| COMMAND_MASK & ftdi->command_next]; |
| command->header = 0x81 | (ed << 5); |
| command->length = 0x0000; |
| command->address = (toggle_bits << 6) | (ep_number << 2) |
| | (address << 0); |
| command->width = usb_maxpacket(urb->dev, urb->pipe, |
| usb_pipeout(urb->pipe)); |
| command->follows = 0; |
| command->value = 0; |
| command->buffer = NULL; |
| target->callback = callback; |
| target->endp = endp; |
| target->urb = urb; |
| target->active = 1; |
| ftdi->command_next += 1; |
| ftdi_elan_kick_command_queue(ftdi); |
| mutex_unlock(&ftdi->u132_lock); |
| return 0; |
| } else { |
| mutex_unlock(&ftdi->u132_lock); |
| msleep(100); |
| goto wait; |
| } |
| } |
| } |
| |
| int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number, |
| void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits, |
| void (*callback) (void *endp, struct urb *urb, u8 *buf, int len, |
| int toggle_bits, int error_count, int condition_code, int repeat_number, |
| int halted, int skipped, int actual, int non_null)) |
| { |
| struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev); |
| return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address, |
| ep_number, toggle_bits, callback); |
| } |
| |
| |
| EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty); |
| static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number, |
| void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits, |
| void (*callback) (void *endp, struct urb *urb, u8 *buf, int len, |
| int toggle_bits, int error_count, int condition_code, int repeat_number, |
| int halted, int skipped, int actual, int non_null)) |
| { |
| u8 ed = ed_number - 1; |
| wait:if (ftdi->disconnected > 0) { |
| return -ENODEV; |
| } else if (ftdi->initialized == 0) { |
| return -ENODEV; |
| } else { |
| int command_size; |
| mutex_lock(&ftdi->u132_lock); |
| command_size = ftdi->command_next - ftdi->command_head; |
| if (command_size < COMMAND_SIZE) { |
| u8 *b; |
| u16 urb_size; |
| int i = 0; |
| char data[30 *3 + 4]; |
| char *d = data; |
| int m = (sizeof(data) - 1) / 3; |
| int l = 0; |
| struct u132_target *target = &ftdi->target[ed]; |
| struct u132_command *command = &ftdi->command[ |
| COMMAND_MASK & ftdi->command_next]; |
| command->header = 0x81 | (ed << 5); |
| command->address = (toggle_bits << 6) | (ep_number << 2) |
| | (address << 0); |
| command->width = usb_maxpacket(urb->dev, urb->pipe, |
| usb_pipeout(urb->pipe)); |
| command->follows = min_t(u32, 1024, |
| urb->transfer_buffer_length - |
| urb->actual_length); |
| command->value = 0; |
| command->buffer = urb->transfer_buffer + |
| urb->actual_length; |
| command->length = 0x8000 | (command->follows - 1); |
| b = command->buffer; |
| urb_size = command->follows; |
| data[0] = 0; |
| while (urb_size-- > 0) { |
| if (i > m) { |
| } else if (i++ < m) { |
| int w = sprintf(d, " %02X", *b++); |
| d += w; |
| l += w; |
| } else |
| d += sprintf(d, " .."); |
| } |
| target->callback = callback; |
| target->endp = endp; |
| target->urb = urb; |
| target->active = 1; |
| ftdi->command_next += 1; |
| ftdi_elan_kick_command_queue(ftdi); |
| mutex_unlock(&ftdi->u132_lock); |
| return 0; |
| } else { |
| mutex_unlock(&ftdi->u132_lock); |
| msleep(100); |
| goto wait; |
| } |
| } |
| } |
| |
| int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number, |
| void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits, |
| void (*callback) (void *endp, struct urb *urb, u8 *buf, int len, |
| int toggle_bits, int error_count, int condition_code, int repeat_number, |
| int halted, int skipped, int actual, int non_null)) |
| { |
| struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev); |
| return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address, |
| ep_number, toggle_bits, callback); |
| } |
| |
| |
| EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output); |
| static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number, |
| void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits, |
| void (*callback) (void *endp, struct urb *urb, u8 *buf, int len, |
| int toggle_bits, int error_count, int condition_code, int repeat_number, |
| int halted, int skipped, int actual, int non_null)) |
| { |
| u8 ed = ed_number - 1; |
| wait:if (ftdi->disconnected > 0) { |
| return -ENODEV; |
| } else if (ftdi->initialized == 0) { |
| return -ENODEV; |
| } else { |
| int command_size; |
| mutex_lock(&ftdi->u132_lock); |
| command_size = ftdi->command_next - ftdi->command_head; |
| if (command_size < COMMAND_SIZE) { |
| u32 remaining_length = urb->transfer_buffer_length - |
| urb->actual_length; |
| struct u132_target *target = &ftdi->target[ed]; |
| struct u132_command *command = &ftdi->command[ |
| COMMAND_MASK & ftdi->command_next]; |
| command->header = 0x83 | (ed << 5); |
| if (remaining_length == 0) { |
| command->length = 0x0000; |
| } else if (remaining_length > 1024) { |
| command->length = 0x8000 | 1023; |
| } else |
| command->length = 0x8000 | (remaining_length - |
| 1); |
| command->address = (toggle_bits << 6) | (ep_number << 2) |
| | (address << 0); |
| command->width = usb_maxpacket(urb->dev, urb->pipe, |
| usb_pipeout(urb->pipe)); |
| command->follows = 0; |
| command->value = 0; |
| command->buffer = NULL; |
| target->callback = callback; |
| target->endp = endp; |
| target->urb = urb; |
| target->active = 1; |
| ftdi->command_next += 1; |
| ftdi_elan_kick_command_queue(ftdi); |
| mutex_unlock(&ftdi->u132_lock); |
| return 0; |
| } else { |
| mutex_unlock(&ftdi->u132_lock); |
| msleep(100); |
| goto wait; |
| } |
| } |
| } |
| |
| int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number, |
| void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits, |
| void (*callback) (void *endp, struct urb *urb, u8 *buf, int len, |
| int toggle_bits, int error_count, int condition_code, int repeat_number, |
| int halted, int skipped, int actual, int non_null)) |
| { |
| struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev); |
| return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address, |
| ep_number, toggle_bits, callback); |
| } |
| |
| |
| EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single); |
| static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number, |
| void *endp) |
| { |
| u8 ed = ed_number - 1; |
| if (ftdi->disconnected > 0) { |
| return -ENODEV; |
| } else if (ftdi->initialized == 0) { |
| return -ENODEV; |
| } else { |
| struct u132_target *target = &ftdi->target[ed]; |
| mutex_lock(&ftdi->u132_lock); |
| if (target->abandoning > 0) { |
| mutex_unlock(&ftdi->u132_lock); |
| return 0; |
| } else { |
| target->abandoning = 1; |
| wait_1:if (target->active == 1) { |
| int command_size = ftdi->command_next - |
| ftdi->command_head; |
| if (command_size < COMMAND_SIZE) { |
| struct u132_command *command = |
| &ftdi->command[COMMAND_MASK & |
| ftdi->command_next]; |
| command->header = 0x80 | (ed << 5) | |
| 0x4; |
| command->length = 0x00; |
| command->address = 0x00; |
| command->width = 0x00; |
| command->follows = 0; |
| command->value = 0; |
| command->buffer = &command->value; |
| ftdi->command_next += 1; |
| ftdi_elan_kick_command_queue(ftdi); |
| } else { |
| mutex_unlock(&ftdi->u132_lock); |
| msleep(100); |
| mutex_lock(&ftdi->u132_lock); |
| goto wait_1; |
| } |
| } |
| mutex_unlock(&ftdi->u132_lock); |
| return 0; |
| } |
| } |
| } |
| |
| int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number, |
| void *endp) |
| { |
| struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev); |
| return ftdi_elan_edset_flush(ftdi, ed_number, endp); |
| } |
| |
| |
| EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush); |
| static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi) |
| { |
| int retry_on_empty = 10; |
| int retry_on_timeout = 5; |
| int retry_on_status = 20; |
| more:{ |
| int packet_bytes = 0; |
| int retval = usb_bulk_msg(ftdi->udev, |
| usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr), |
| ftdi->bulk_in_buffer, ftdi->bulk_in_size, |
| &packet_bytes, 100); |
| if (packet_bytes > 2) { |
| char diag[30 *3 + 4]; |
| char *d = diag; |
| int m = (sizeof(diag) - 1) / 3; |
| char *b = ftdi->bulk_in_buffer; |
| int bytes_read = 0; |
| diag[0] = 0; |
| while (packet_bytes-- > 0) { |
| char c = *b++; |
| if (bytes_read < m) { |
| d += sprintf(d, " %02X", |
| 0x000000FF & c); |
| } else if (bytes_read > m) { |
| } else |
| d += sprintf(d, " .."); |
| bytes_read += 1; |
| continue; |
| } |
| goto more; |
| } else if (packet_bytes > 1) { |
| char s1 = ftdi->bulk_in_buffer[0]; |
| char s2 = ftdi->bulk_in_buffer[1]; |
| if (s1 == 0x31 && s2 == 0x60) { |
| return 0; |
| } else if (retry_on_status-- > 0) { |
| goto more; |
| } else { |
| dev_err(&ftdi->udev->dev, "STATUS ERROR retry l" |
| "imit reached\n"); |
| return -EFAULT; |
| } |
| } else if (packet_bytes > 0) { |
| char b1 = ftdi->bulk_in_buffer[0]; |
| dev_err(&ftdi->udev->dev, "only one byte flushed from F" |
| "TDI = %02X\n", b1); |
| if (retry_on_status-- > 0) { |
| goto more; |
| } else { |
| dev_err(&ftdi->udev->dev, "STATUS ERROR retry l" |
| "imit reached\n"); |
| return -EFAULT; |
| } |
| } else if (retval == -ETIMEDOUT) { |
| if (retry_on_timeout-- > 0) { |
| goto more; |
| } else { |
| dev_err(&ftdi->udev->dev, "TIMED OUT retry limi" |
| "t reached\n"); |
| return -ENOMEM; |
| } |
| } else if (retval == 0) { |
| if (retry_on_empty-- > 0) { |
| goto more; |
| } else { |
| dev_err(&ftdi->udev->dev, "empty packet retry l" |
| "imit reached\n"); |
| return -ENOMEM; |
| } |
| } else { |
| dev_err(&ftdi->udev->dev, "error = %d\n", retval); |
| return retval; |
| } |
| } |
| return -1; |
| } |
| |
| |
| /* |
| * send the long flush sequence |
| * |
| */ |
| static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi) |
| { |
| int retval; |
| struct urb *urb; |
| char *buf; |
| int I = 257; |
| int i = 0; |
| urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!urb) { |
| dev_err(&ftdi->udev->dev, "could not alloc a urb for flush sequ" |
| "ence\n"); |
| return -ENOMEM; |
| } |
| buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma); |
| if (!buf) { |
| dev_err(&ftdi->udev->dev, "could not get a buffer for flush seq" |
| "uence\n"); |
| usb_free_urb(urb); |
| return -ENOMEM; |
| } |
| while (I-- > 0) |
| buf[i++] = 0x55; |
| usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev, |
| ftdi->bulk_out_endpointAddr), buf, i, |
| ftdi_elan_write_bulk_callback, ftdi); |
| urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| retval = usb_submit_urb(urb, GFP_KERNEL); |
| if (retval) { |
| dev_err(&ftdi->udev->dev, "failed to submit urb containing the " |
| "flush sequence\n"); |
| usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma); |
| usb_free_urb(urb); |
| return -ENOMEM; |
| } |
| usb_free_urb(urb); |
| return 0; |
| } |
| |
| |
| /* |
| * send the reset sequence |
| * |
| */ |
| static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi) |
| { |
| int retval; |
| struct urb *urb; |
| char *buf; |
| int I = 4; |
| int i = 0; |
| urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!urb) { |
| dev_err(&ftdi->udev->dev, "could not get a urb for the reset se" |
| "quence\n"); |
| return -ENOMEM; |
| } |
| buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma); |
| if (!buf) { |
| dev_err(&ftdi->udev->dev, "could not get a buffer for the reset" |
| " sequence\n"); |
| usb_free_urb(urb); |
| return -ENOMEM; |
| } |
| buf[i++] = 0x55; |
| buf[i++] = 0xAA; |
| buf[i++] = 0x5A; |
| buf[i++] = 0xA5; |
| usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev, |
| ftdi->bulk_out_endpointAddr), buf, i, |
| ftdi_elan_write_bulk_callback, ftdi); |
| urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| retval = usb_submit_urb(urb, GFP_KERNEL); |
| if (retval) { |
| dev_err(&ftdi->udev->dev, "failed to submit urb containing the " |
| "reset sequence\n"); |
| usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma); |
| usb_free_urb(urb); |
| return -ENOMEM; |
| } |
| usb_free_urb(urb); |
| return 0; |
| } |
| |
| static int ftdi_elan_synchronize(struct usb_ftdi *ftdi) |
| { |
| int retval; |
| int long_stop = 10; |
| int retry_on_timeout = 5; |
| int retry_on_empty = 10; |
| int err_count = 0; |
| retval = ftdi_elan_flush_input_fifo(ftdi); |
| if (retval) |
| return retval; |
| ftdi->bulk_in_left = 0; |
| ftdi->bulk_in_last = -1; |
| while (long_stop-- > 0) { |
| int read_stop; |
| int read_stuck; |
| retval = ftdi_elan_synchronize_flush(ftdi); |
| if (retval) |
| return retval; |
| retval = ftdi_elan_flush_input_fifo(ftdi); |
| if (retval) |
| return retval; |
| reset:retval = ftdi_elan_synchronize_reset(ftdi); |
| if (retval) |
| return retval; |
| read_stop = 100; |
| read_stuck = 10; |
| read:{ |
| int packet_bytes = 0; |
| retval = usb_bulk_msg(ftdi->udev, |
| usb_rcvbulkpipe(ftdi->udev, |
| ftdi->bulk_in_endpointAddr), |
| ftdi->bulk_in_buffer, ftdi->bulk_in_size, |
| &packet_bytes, 500); |
| if (packet_bytes > 2) { |
| char diag[30 *3 + 4]; |
| char *d = diag; |
| int m = (sizeof(diag) - 1) / 3; |
| char *b = ftdi->bulk_in_buffer; |
| int bytes_read = 0; |
| unsigned char c = 0; |
| diag[0] = 0; |
| while (packet_bytes-- > 0) { |
| c = *b++; |
| if (bytes_read < m) { |
| d += sprintf(d, " %02X", c); |
| } else if (bytes_read > m) { |
| } else |
| d += sprintf(d, " .."); |
| bytes_read += 1; |
| continue; |
| } |
| if (c == 0x7E) { |
| return 0; |
| } else { |
| if (c == 0x55) { |
| goto read; |
| } else if (read_stop-- > 0) { |
| goto read; |
| } else { |
| dev_err(&ftdi->udev->dev, "retr" |
| "y limit reached\n"); |
| continue; |
| } |
| } |
| } else if (packet_bytes > 1) { |
| unsigned char s1 = ftdi->bulk_in_buffer[0]; |
| unsigned char s2 = ftdi->bulk_in_buffer[1]; |
| if (s1 == 0x31 && s2 == 0x00) { |
| if (read_stuck-- > 0) { |
| goto read; |
| } else |
| goto reset; |
| } else if (s1 == 0x31 && s2 == 0x60) { |
| if (read_stop-- > 0) { |
| goto read; |
| } else { |
| dev_err(&ftdi->udev->dev, "retr" |
| "y limit reached\n"); |
| continue; |
| } |
| } else { |
| if (read_stop-- > 0) { |
| goto read; |
| } else { |
| dev_err(&ftdi->udev->dev, "retr" |
| "y limit reached\n"); |
| continue; |
| } |
| } |
| } else if (packet_bytes > 0) { |
| if (read_stop-- > 0) { |
| goto read; |
| } else { |
| dev_err(&ftdi->udev->dev, "retry limit " |
| "reached\n"); |
| continue; |
| } |
| } else if (retval == -ETIMEDOUT) { |
| if (retry_on_timeout-- > 0) { |
| goto read; |
| } else { |
| dev_err(&ftdi->udev->dev, "TIMED OUT re" |
| "try limit reached\n"); |
| continue; |
| } |
| } else if (retval == 0) { |
| if (retry_on_empty-- > 0) { |
| goto read; |
| } else { |
| dev_err(&ftdi->udev->dev, "empty packet" |
| " retry limit reached\n"); |
| continue; |
| } |
| } else { |
| err_count += 1; |
| dev_err(&ftdi->udev->dev, "error = %d\n", |
| retval); |
| if (read_stop-- > 0) { |
| goto read; |
| } else { |
| dev_err(&ftdi->udev->dev, "retry limit " |
| "reached\n"); |
| continue; |
| } |
| } |
| } |
| } |
| dev_err(&ftdi->udev->dev, "failed to synchronize\n"); |
| return -EFAULT; |
| } |
| |
| static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi) |
| { |
| int retry_on_empty = 10; |
| int retry_on_timeout = 5; |
| int retry_on_status = 50; |
| more:{ |
| int packet_bytes = 0; |
| int retval = usb_bulk_msg(ftdi->udev, |
| usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr), |
| ftdi->bulk_in_buffer, ftdi->bulk_in_size, |
| &packet_bytes, 1000); |
| if (packet_bytes > 2) { |
| char diag[30 *3 + 4]; |
| char *d = diag; |
| int m = (sizeof(diag) - 1) / 3; |
| char *b = ftdi->bulk_in_buffer; |
| int bytes_read = 0; |
| diag[0] = 0; |
| while (packet_bytes-- > 0) { |
| char c = *b++; |
| if (bytes_read < m) { |
| d += sprintf(d, " %02X", |
| 0x000000FF & c); |
| } else if (bytes_read > m) { |
| } else |
| d += sprintf(d, " .."); |
| bytes_read += 1; |
| continue; |
| } |
| goto more; |
| } else if (packet_bytes > 1) { |
| char s1 = ftdi->bulk_in_buffer[0]; |
| char s2 = ftdi->bulk_in_buffer[1]; |
| if (s1 == 0x31 && s2 == 0x60) { |
| return 0; |
| } else if (retry_on_status-- > 0) { |
| msleep(5); |
| goto more; |
| } else |
| return -EFAULT; |
| } else if (packet_bytes > 0) { |
| char b1 = ftdi->bulk_in_buffer[0]; |
| dev_err(&ftdi->udev->dev, "only one byte flushed from F" |
| "TDI = %02X\n", b1); |
| if (retry_on_status-- > 0) { |
| msleep(5); |
| goto more; |
| } else { |
| dev_err(&ftdi->udev->dev, "STATUS ERROR retry l" |
| "imit reached\n"); |
| return -EFAULT; |
| } |
| } else if (retval == -ETIMEDOUT) { |
| if (retry_on_timeout-- > 0) { |
| goto more; |
| } else { |
| dev_err(&ftdi->udev->dev, "TIMED OUT retry limi" |
| "t reached\n"); |
| return -ENOMEM; |
| } |
| } else if (retval == 0) { |
| if (retry_on_empty-- > 0) { |
| goto more; |
| } else { |
| dev_err(&ftdi->udev->dev, "empty packet retry l" |
| "imit reached\n"); |
| return -ENOMEM; |
| } |
| } else { |
| dev_err(&ftdi->udev->dev, "error = %d\n", retval); |
| return -ENOMEM; |
| } |
| } |
| return -1; |
| } |
| |
| static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi) |
| { |
| int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg); |
| if (UxxxStatus) |
| return UxxxStatus; |
| if (ftdi->controlreg & 0x00400000) { |
| if (ftdi->card_ejected) { |
| } else { |
| ftdi->card_ejected = 1; |
| dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = " |
| "%08X\n", ftdi->controlreg); |
| } |
| return -ENODEV; |
| } else { |
| u8 fn = ftdi->function - 1; |
| int activePCIfn = fn << 8; |
| u32 pcidata; |
| u32 pciVID; |
| u32 pciPID; |
| int reg = 0; |
| UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, |
| &pcidata); |
| if (UxxxStatus) |
| return UxxxStatus; |
| pciVID = pcidata & 0xFFFF; |
| pciPID = (pcidata >> 16) & 0xFFFF; |
| if (pciVID == ftdi->platform_data.vendor && pciPID == |
| ftdi->platform_data.device) { |
| return 0; |
| } else { |
| dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X devi" |
| "ce=%04X pciPID=%04X\n", |
| ftdi->platform_data.vendor, pciVID, |
| ftdi->platform_data.device, pciPID); |
| return -ENODEV; |
| } |
| } |
| } |
| |
| |
| #define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \ |
| offsetof(struct ohci_regs, member), 0, data); |
| #define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \ |
| offsetof(struct ohci_regs, member), 0, data); |
| |
| #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR |
| #define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD | \ |
| OHCI_INTR_WDH) |
| static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk) |
| { |
| int devices = 0; |
| int retval; |
| u32 hc_control; |
| int num_ports; |
| u32 control; |
| u32 rh_a = -1; |
| u32 status; |
| u32 fminterval; |
| u32 hc_fminterval; |
| u32 periodicstart; |
| u32 cmdstatus; |
| u32 roothub_a; |
| int mask = OHCI_INTR_INIT; |
| int sleep_time = 0; |
| int reset_timeout = 30; /* ... allow extra time */ |
| int temp; |
| retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE); |
| if (retval) |
| return retval; |
| retval = ftdi_read_pcimem(ftdi, control, &control); |
| if (retval) |
| return retval; |
| retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a); |
| if (retval) |
| return retval; |
| num_ports = rh_a & RH_A_NDP; |
| retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval); |
| if (retval) |
| return retval; |
| hc_fminterval &= 0x3fff; |
| if (hc_fminterval != FI) { |
| } |
| hc_fminterval |= FSMP(hc_fminterval) << 16; |
| retval = ftdi_read_pcimem(ftdi, control, &hc_control); |
| if (retval) |
| return retval; |
| switch (hc_control & OHCI_CTRL_HCFS) { |
| case OHCI_USB_OPER: |
| sleep_time = 0; |
| break; |
| case OHCI_USB_SUSPEND: |
| case OHCI_USB_RESUME: |
| hc_control &= OHCI_CTRL_RWC; |
| hc_control |= OHCI_USB_RESUME; |
| sleep_time = 10; |
| break; |
| default: |
| hc_control &= OHCI_CTRL_RWC; |
| hc_control |= OHCI_USB_RESET; |
| sleep_time = 50; |
| break; |
| } |
| retval = ftdi_write_pcimem(ftdi, control, hc_control); |
| if (retval) |
| return retval; |
| retval = ftdi_read_pcimem(ftdi, control, &control); |
| if (retval) |
| return retval; |
| msleep(sleep_time); |
| retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a); |
| if (retval) |
| return retval; |
| if (!(roothub_a & RH_A_NPS)) { /* power down each port */ |
| for (temp = 0; temp < num_ports; temp++) { |
| retval = ftdi_write_pcimem(ftdi, |
| roothub.portstatus[temp], RH_PS_LSDA); |
| if (retval) |
| return retval; |
| } |
| } |
| retval = ftdi_read_pcimem(ftdi, control, &control); |
| if (retval) |
| return retval; |
| retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status); |
| if (retval) |
| return retval; |
| retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR); |
| if (retval) |
| return retval; |
| extra:{ |
| retval = ftdi_read_pcimem(ftdi, cmdstatus, &status); |
| if (retval) |
| return retval; |
| if (0 != (status & OHCI_HCR)) { |
| if (--reset_timeout == 0) { |
| dev_err(&ftdi->udev->dev, "USB HC reset timed o" |
| "ut!\n"); |
| return -ENODEV; |
| } else { |
| msleep(5); |
| goto extra; |
| } |
| } |
| } |
| if (quirk & OHCI_QUIRK_INITRESET) { |
| retval = ftdi_write_pcimem(ftdi, control, hc_control); |
| if (retval) |
| return retval; |
| retval = ftdi_read_pcimem(ftdi, control, &control); |
| if (retval) |
| return retval; |
| } |
| retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000); |
| if (retval) |
| return retval; |
| retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000); |
| if (retval) |
| return retval; |
| retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000); |
| if (retval) |
| return retval; |
| retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval); |
| if (retval) |
| return retval; |
| retval = ftdi_write_pcimem(ftdi, fminterval, |
| ((fminterval & FIT) ^ FIT) | hc_fminterval); |
| if (retval) |
| return retval; |
| retval = ftdi_write_pcimem(ftdi, periodicstart, |
| ((9 *hc_fminterval) / 10) & 0x3fff); |
| if (retval) |
| return retval; |
| retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval); |
| if (retval) |
| return retval; |
| retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart); |
| if (retval) |
| return retval; |
| if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) { |
| if (!(quirk & OHCI_QUIRK_INITRESET)) { |
| quirk |= OHCI_QUIRK_INITRESET; |
| goto retry; |
| } else |
| dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n", |
| fminterval, periodicstart); |
| } /* start controller operations */ |
| hc_control &= OHCI_CTRL_RWC; |
| hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER; |
| retval = ftdi_write_pcimem(ftdi, control, hc_control); |
| if (retval) |
| return retval; |
| retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF); |
| if (retval) |
| return retval; |
| retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus); |
| if (retval) |
| return retval; |
| retval = ftdi_read_pcimem(ftdi, control, &control); |
| if (retval) |
| return retval; |
| retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE); |
| if (retval) |
| return retval; |
| retval = ftdi_write_pcimem(ftdi, intrstatus, mask); |
| if (retval) |
| return retval; |
| retval = ftdi_write_pcimem(ftdi, intrdisable, |
| OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO | |
| OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH | |
| OHCI_INTR_SO); |
| if (retval) |
| return retval; /* handle root hub init quirks ... */ |
| retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a); |
| if (retval) |
| return retval; |
| roothub_a &= ~(RH_A_PSM | RH_A_OCPM); |
| if (quirk & OHCI_QUIRK_SUPERIO) { |
| roothub_a |= RH_A_NOCP; |
| roothub_a &= ~(RH_A_POTPGT | RH_A_NPS); |
| retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a); |
| if (retval) |
| return retval; |
| } else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) { |
| roothub_a |= RH_A_NPS; |
| retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a); |
| if (retval) |
| return retval; |
| } |
| retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC); |
| if (retval) |
| return retval; |
| retval = ftdi_write_pcimem(ftdi, roothub.b, |
| (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM); |
| if (retval) |
| return retval; |
| retval = ftdi_read_pcimem(ftdi, control, &control); |
| if (retval) |
| return retval; |
| mdelay((roothub_a >> 23) & 0x1fe); |
| for (temp = 0; temp < num_ports; temp++) { |
| u32 portstatus; |
| retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp], |
| &portstatus); |
| if (retval) |
| return retval; |
| if (1 & portstatus) |
| devices += 1; |
| } |
| return devices; |
| } |
| |
| static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn) |
| { |
| u32 latence_timer; |
| int UxxxStatus; |
| u32 pcidata; |
| int reg = 0; |
| int activePCIfn = fn << 8; |
| UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800); |
| if (UxxxStatus) |
| return UxxxStatus; |
| reg = 16; |
| UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0, |
| 0xFFFFFFFF); |
| if (UxxxStatus) |
| return UxxxStatus; |
| UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, |
| &pcidata); |
| if (UxxxStatus) |
| return UxxxStatus; |
| UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0, |
| 0xF0000000); |
| if (UxxxStatus) |
| return UxxxStatus; |
| UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, |
| &pcidata); |
| if (UxxxStatus) |
| return UxxxStatus; |
| reg = 12; |
| UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, |
| &latence_timer); |
| if (UxxxStatus) |
| return UxxxStatus; |
| latence_timer &= 0xFFFF00FF; |
| latence_timer |= 0x00001600; |
| UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00, |
| latence_timer); |
| if (UxxxStatus) |
| return UxxxStatus; |
| UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, |
| &pcidata); |
| if (UxxxStatus) |
| return UxxxStatus; |
| reg = 4; |
| UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00, |
| 0x06); |
| if (UxxxStatus) |
| return UxxxStatus; |
| UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, |
| &pcidata); |
| if (UxxxStatus) |
| return UxxxStatus; |
| for (reg = 0; reg <= 0x54; reg += 4) { |
| UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata); |
| if (UxxxStatus) |
| return UxxxStatus; |
| } |
| return 0; |
| } |
| |
| static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn) |
| { |
| u32 latence_timer; |
| int UxxxStatus; |
| u32 pcidata; |
| int reg = 0; |
| int activePCIfn = fn << 8; |
| UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800); |
| if (UxxxStatus) |
| return UxxxStatus; |
| reg = 16; |
| UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0, |
| 0xFFFFFFFF); |
| if (UxxxStatus) |
| return UxxxStatus; |
| UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, |
| &pcidata); |
| if (UxxxStatus) |
| return UxxxStatus; |
| UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0, |
| 0x00000000); |
| if (UxxxStatus) |
| return UxxxStatus; |
| UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, |
| &pcidata); |
| if (UxxxStatus) |
| return UxxxStatus; |
| reg = 12; |
| UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, |
| &latence_timer); |
| if (UxxxStatus) |
| return UxxxStatus; |
| latence_timer &= 0xFFFF00FF; |
| latence_timer |= 0x00001600; |
| UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00, |
| latence_timer); |
| if (UxxxStatus) |
| return UxxxStatus; |
| UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, |
| &pcidata); |
| if (UxxxStatus) |
| return UxxxStatus; |
| reg = 4; |
| UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00, |
| 0x00); |
| if (UxxxStatus) |
| return UxxxStatus; |
| UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, |
| &pcidata); |
| if (UxxxStatus) |
| return UxxxStatus; |
| return 0; |
| } |
| |
| static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk) |
| { |
| int result; |
| int UxxxStatus; |
| UxxxStatus |