diff options
Diffstat (limited to 'kernel/drivers/usb/misc/ftdi-elan.c')
| -rw-r--r-- | kernel/drivers/usb/misc/ftdi-elan.c | 2906 |
1 files changed, 2906 insertions, 0 deletions
diff --git a/kernel/drivers/usb/misc/ftdi-elan.c b/kernel/drivers/usb/misc/ftdi-elan.c new file mode 100644 index 000000000..8ab1f8f3c --- /dev/null +++ b/kernel/drivers/usb/misc/ftdi-elan.c @@ -0,0 +1,2906 @@ +/* + * 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. + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#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/overcurrent 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 confirmed platform_dev.dev.parent=%p platform_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) { + pr_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 commands 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 commands 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 packet_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 packet_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) value = %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 limit 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 FTDI = %02X\n", + b1); + if (retry_on_status-- > 0) { + goto more; + } else { + dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n"); + return -EFAULT; + } + } else if (retval == -ETIMEDOUT) { + if (retry_on_timeout-- > 0) { + goto more; + } else { + dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n"); + return -ENOMEM; + } + } else if (retval == 0) { + if (retry_on_empty-- > 0) { + goto more; + } else { + dev_err(&ftdi->udev->dev, "empty packet retry limit 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 sequence\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 sequence\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 sequence\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, "retry 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, "retry limit reached\n"); + continue; + } + } else { + if (read_stop-- > 0) { + goto read; + } else { + dev_err(&ftdi->udev->dev, "retry 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 retry 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 FTDI = %02X\n", b1); + if (retry_on_status-- > 0) { + msleep(5); + goto more; + } else { + dev_err(&ftdi->udev->dev, "STATUS ERROR retry limit reached\n"); + return -EFAULT; + } + } else if (retval == -ETIMEDOUT) { + if (retry_on_timeout-- > 0) { + goto more; + } else { + dev_err(&ftdi->udev->dev, "TIMED OUT retry limit reached\n"); + return -ENOMEM; + } + } else if (retval == 0) { + if (retry_on_empty-- > 0) { + goto more; + } else { + dev_err(&ftdi->udev->dev, "empty packet retry limit 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 device=%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 out!\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 = ftdi_elan_setup_controller(ftdi, fn); + if (UxxxStatus) + return UxxxStatus; + result = ftdi_elan_check_controller(ftdi, quirk); + UxxxStatus = ftdi_elan_close_controller(ftdi, fn); + if (UxxxStatus) + return UxxxStatus; + return result; +} + +static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi) +{ + u32 controlreg; + u8 sensebits; + int UxxxStatus; + UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg); + if (UxxxStatus) + return UxxxStatus; + UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L); + if (UxxxStatus) + return UxxxStatus; + msleep(750); + UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100); + if (UxxxStatus) + return UxxxStatus; + UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500); + if (UxxxStatus) + return UxxxStatus; + UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg); + if (UxxxStatus) + return UxxxStatus; + UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000); + if (UxxxStatus) + return UxxxStatus; + UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000); + if (UxxxStatus) + return UxxxStatus; + msleep(250); + UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000); + if (UxxxStatus) + return UxxxStatus; + UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg); + if (UxxxStatus) + return UxxxStatus; + UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800); + if (UxxxStatus) + return UxxxStatus; + UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg); + if (UxxxStatus) + return UxxxStatus; + UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg); + if (UxxxStatus) + return UxxxStatus; + msleep(1000); + sensebits = (controlreg >> 16) & 0x000F; + if (0x0D == sensebits) + return 0; + else + return - ENXIO; +} + +static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi) +{ + int UxxxStatus; + u32 pcidata; + int reg = 0; + u8 fn; + int activePCIfn = 0; + int max_devices = 0; + int controllers = 0; + int unrecognized = 0; + ftdi->function = 0; + for (fn = 0; (fn < 4); fn++) { + u32 pciVID = 0; + u32 pciPID = 0; + int devices = 0; + activePCIfn = fn << 8; + UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0, + &pcidata); + if (UxxxStatus) + return UxxxStatus; + pciVID = pcidata & 0xFFFF; + pciPID = (pcidata >> 16) & 0xFFFF; + if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) { + devices = ftdi_elan_found_controller(ftdi, fn, 0); + controllers += 1; + } else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035)) + { + devices = ftdi_elan_found_controller(ftdi, fn, 0); + controllers += 1; + } else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) { + devices = ftdi_elan_found_controller(ftdi, fn, 0); + controllers += 1; + } else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802)) + { + devices = ftdi_elan_found_controller(ftdi, fn, 0); + controllers += 1; + } else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) { + devices = ftdi_elan_found_controller(ftdi, fn, + OHCI_QUIRK_AMD756); + controllers += 1; + } else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) { + devices = ftdi_elan_found_controller(ftdi, fn, + OHCI_QUIRK_ZFMICRO); + controllers += 1; + } else if (0 == pcidata) { + } else + unrecognized += 1; + if (devices > max_devices) { + max_devices = devices; + ftdi->function = fn + 1; + ftdi->platform_data.vendor = pciVID; + ftdi->platform_data.device = pciPID; + } + } + if (ftdi->function > 0) { + UxxxStatus = ftdi_elan_setup_controller(ftdi, + ftdi->function - 1); + if (UxxxStatus) + return UxxxStatus; + return 0; + } else if (controllers > 0) { + return -ENXIO; + } else if (unrecognized > 0) { + return -ENXIO; + } else { + ftdi->enumerated = 0; + return -ENXIO; + } +} + + +/* + * we use only the first bulk-in and bulk-out endpoints + */ +static int ftdi_elan_probe(struct usb_interface *interface, + const struct usb_device_id *id) +{ + struct usb_host_interface *iface_desc; + struct usb_endpoint_descriptor *endpoint; + size_t buffer_size; + int i; + int retval = -ENOMEM; + struct usb_ftdi *ftdi; + + ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL); + if (!ftdi) + return -ENOMEM; + + mutex_lock(&ftdi_module_lock); + list_add_tail(&ftdi->ftdi_list, &ftdi_static_list); + ftdi->sequence_num = ++ftdi_instances; + mutex_unlock(&ftdi_module_lock); + ftdi_elan_init_kref(ftdi); + sema_init(&ftdi->sw_lock, 1); + ftdi->udev = usb_get_dev(interface_to_usbdev(interface)); + ftdi->interface = interface; + mutex_init(&ftdi->u132_lock); + ftdi->expected = 4; + iface_desc = interface->cur_altsetting; + for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { + endpoint = &iface_desc->endpoint[i].desc; + if (!ftdi->bulk_in_endpointAddr && + usb_endpoint_is_bulk_in(endpoint)) { + buffer_size = usb_endpoint_maxp(endpoint); + ftdi->bulk_in_size = buffer_size; + ftdi->bulk_in_endpointAddr = endpoint->bEndpointAddress; + ftdi->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL); + if (!ftdi->bulk_in_buffer) { + dev_err(&ftdi->udev->dev, "Could not allocate bulk_in_buffer\n"); + retval = -ENOMEM; + goto error; + } + } + if (!ftdi->bulk_out_endpointAddr && + usb_endpoint_is_bulk_out(endpoint)) { + ftdi->bulk_out_endpointAddr = + endpoint->bEndpointAddress; + } + } + if (!(ftdi->bulk_in_endpointAddr && ftdi->bulk_out_endpointAddr)) { + dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk-out endpoints\n"); + retval = -ENODEV; + goto error; + } + dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n", + iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr, + ftdi->bulk_out_endpointAddr); + usb_set_intfdata(interface, ftdi); + if (iface_desc->desc.bInterfaceNumber == 0 && + ftdi->bulk_in_endpointAddr == 0x81 && + ftdi->bulk_out_endpointAddr == 0x02) { + retval = usb_register_dev(interface, &ftdi_elan_jtag_class); + if (retval) { + dev_err(&ftdi->udev->dev, "Not able to get a minor for this device\n"); + usb_set_intfdata(interface, NULL); + retval = -ENOMEM; + goto error; + } else { + ftdi->class = &ftdi_elan_jtag_class; + dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface %d now attached to ftdi%d\n", + ftdi, iface_desc->desc.bInterfaceNumber, + interface->minor); + return 0; + } + } else if (iface_desc->desc.bInterfaceNumber == 1 && + ftdi->bulk_in_endpointAddr == 0x83 && + ftdi->bulk_out_endpointAddr == 0x04) { + ftdi->class = NULL; + dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now activated\n", + ftdi, iface_desc->desc.bInterfaceNumber); + INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work); + INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work); + INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work); + ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000)); + return 0; + } else { + dev_err(&ftdi->udev->dev, + "Could not find ELAN's U132 device\n"); + retval = -ENODEV; + goto error; + } +error:if (ftdi) { + ftdi_elan_put_kref(ftdi); + } + return retval; +} + +static void ftdi_elan_disconnect(struct usb_interface *interface) +{ + struct usb_ftdi *ftdi = usb_get_intfdata(interface); + ftdi->disconnected += 1; + if (ftdi->class) { + int minor = interface->minor; + struct usb_class_driver *class = ftdi->class; + usb_set_intfdata(interface, NULL); + usb_deregister_dev(interface, class); + dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on minor %d now disconnected\n", + minor); + } else { + ftdi_status_cancel_work(ftdi); + ftdi_command_cancel_work(ftdi); + ftdi_response_cancel_work(ftdi); + ftdi_elan_abandon_completions(ftdi); + ftdi_elan_abandon_targets(ftdi); + if (ftdi->registered) { + platform_device_unregister(&ftdi->platform_dev); + ftdi->synchronized = 0; + ftdi->enumerated = 0; + ftdi->initialized = 0; + ftdi->registered = 0; + } + flush_workqueue(status_queue); + flush_workqueue(command_queue); + flush_workqueue(respond_queue); + ftdi->disconnected += 1; + usb_set_intfdata(interface, NULL); + dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller interface now disconnected\n"); + } + ftdi_elan_put_kref(ftdi); +} + +static struct usb_driver ftdi_elan_driver = { + .name = "ftdi-elan", + .probe = ftdi_elan_probe, + .disconnect = ftdi_elan_disconnect, + .id_table = ftdi_elan_table, +}; +static int __init ftdi_elan_init(void) +{ + int result; + pr_info("driver %s\n", ftdi_elan_driver.name); + mutex_init(&ftdi_module_lock); + INIT_LIST_HEAD(&ftdi_static_list); + status_queue = create_singlethread_workqueue("ftdi-status-control"); + if (!status_queue) + goto err_status_queue; + command_queue = create_singlethread_workqueue("ftdi-command-engine"); + if (!command_queue) + goto err_command_queue; + respond_queue = create_singlethread_workqueue("ftdi-respond-engine"); + if (!respond_queue) + goto err_respond_queue; + result = usb_register(&ftdi_elan_driver); + if (result) { + destroy_workqueue(status_queue); + destroy_workqueue(command_queue); + destroy_workqueue(respond_queue); + pr_err("usb_register failed. Error number %d\n", result); + } + return result; + +err_respond_queue: + destroy_workqueue(command_queue); +err_command_queue: + destroy_workqueue(status_queue); +err_status_queue: + pr_err("%s couldn't create workqueue\n", ftdi_elan_driver.name); + return -ENOMEM; +} + +static void __exit ftdi_elan_exit(void) +{ + struct usb_ftdi *ftdi; + struct usb_ftdi *temp; + usb_deregister(&ftdi_elan_driver); + pr_info("ftdi_u132 driver deregistered\n"); + list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) { + ftdi_status_cancel_work(ftdi); + ftdi_command_cancel_work(ftdi); + ftdi_response_cancel_work(ftdi); + } flush_workqueue(status_queue); + destroy_workqueue(status_queue); + status_queue = NULL; + flush_workqueue(command_queue); + destroy_workqueue(command_queue); + command_queue = NULL; + flush_workqueue(respond_queue); + destroy_workqueue(respond_queue); + respond_queue = NULL; +} + + +module_init(ftdi_elan_init); +module_exit(ftdi_elan_exit); |