diff options
Diffstat (limited to 'drivers/usb/serial/sam-ba.c')
| -rw-r--r-- | drivers/usb/serial/sam-ba.c | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/drivers/usb/serial/sam-ba.c b/drivers/usb/serial/sam-ba.c deleted file mode 100644 index e3bba64afc57..000000000000 --- a/drivers/usb/serial/sam-ba.c +++ /dev/null @@ -1,206 +0,0 @@ -/* - * Atmel SAM Boot Assistant (SAM-BA) driver - * - * Copyright (C) 2010 Johan Hovold <jhovold@gmail.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License version - * 2 as published by the Free Software Foundation. - */ - -#include <linux/kernel.h> -#include <linux/tty.h> -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/usb.h> -#include <linux/usb/serial.h> - - -#define DRIVER_VERSION "v1.0" -#define DRIVER_AUTHOR "Johan Hovold <jhovold@gmail.com>" -#define DRIVER_DESC "Atmel SAM Boot Assistant (SAM-BA) driver" - -#define SAMBA_VENDOR_ID 0x3eb -#define SAMBA_PRODUCT_ID 0x6124 - - -static int debug; - -static const struct usb_device_id id_table[] = { - /* - * NOTE: Only match the CDC Data interface. - */ - { USB_DEVICE_AND_INTERFACE_INFO(SAMBA_VENDOR_ID, SAMBA_PRODUCT_ID, - USB_CLASS_CDC_DATA, 0, 0) }, - { } -}; -MODULE_DEVICE_TABLE(usb, id_table); - -static struct usb_driver samba_driver = { - .name = "sam-ba", - .probe = usb_serial_probe, - .disconnect = usb_serial_disconnect, - .id_table = id_table, - .no_dynamic_id = 1, -}; - - -/* - * NOTE: The SAM-BA firmware cannot handle merged write requests so we cannot - * use the generic write implementation (which uses the port write fifo). - */ -static int samba_write(struct tty_struct *tty, struct usb_serial_port *port, - const unsigned char *buf, int count) -{ - struct urb *urb; - unsigned long flags; - int result; - int i; - - if (!count) - return 0; - - count = min_t(int, count, port->bulk_out_size); - - spin_lock_irqsave(&port->lock, flags); - if (!port->write_urbs_free) { - spin_unlock_irqrestore(&port->lock, flags); - return 0; - } - i = find_first_bit(&port->write_urbs_free, - ARRAY_SIZE(port->write_urbs)); - __clear_bit(i, &port->write_urbs_free); - port->tx_bytes += count; - spin_unlock_irqrestore(&port->lock, flags); - - urb = port->write_urbs[i]; - memcpy(urb->transfer_buffer, buf, count); - urb->transfer_buffer_length = count; - usb_serial_debug_data(debug, &port->dev, __func__, count, - urb->transfer_buffer); - result = usb_submit_urb(urb, GFP_ATOMIC); - if (result) { - dev_err(&port->dev, "%s - error submitting urb: %d\n", - __func__, result); - spin_lock_irqsave(&port->lock, flags); - __set_bit(i, &port->write_urbs_free); - port->tx_bytes -= count; - spin_unlock_irqrestore(&port->lock, flags); - - return result; - } - - return count; -} - -static int samba_write_room(struct tty_struct *tty) -{ - struct usb_serial_port *port = tty->driver_data; - unsigned long flags; - unsigned long free; - int count; - int room; - - spin_lock_irqsave(&port->lock, flags); - free = port->write_urbs_free; - spin_unlock_irqrestore(&port->lock, flags); - - count = hweight_long(free); - room = count * port->bulk_out_size; - - dbg("%s - returns %d", __func__, room); - - return room; -} - -static int samba_chars_in_buffer(struct tty_struct *tty) -{ - struct usb_serial_port *port = tty->driver_data; - unsigned long flags; - int chars; - - spin_lock_irqsave(&port->lock, flags); - chars = port->tx_bytes; - spin_unlock_irqrestore(&port->lock, flags); - - dbg("%s - returns %d", __func__, chars); - - return chars; -} - -static void samba_write_bulk_callback(struct urb *urb) -{ - struct usb_serial_port *port = urb->context; - unsigned long flags; - int i; - - dbg("%s - port %d", __func__, port->number); - - for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) { - if (port->write_urbs[i] == urb) - break; - } - spin_lock_irqsave(&port->lock, flags); - __set_bit(i, &port->write_urbs_free); - port->tx_bytes -= urb->transfer_buffer_length; - spin_unlock_irqrestore(&port->lock, flags); - - if (urb->status) - dbg("%s - non-zero urb status: %d", __func__, urb->status); - - usb_serial_port_softint(port); -} - -static struct usb_serial_driver samba_device = { - .driver = { - .owner = THIS_MODULE, - .name = "sam-ba", - }, - .usb_driver = &samba_driver, - .id_table = id_table, - .num_ports = 1, - .bulk_in_size = 512, - .bulk_out_size = 2048, - .write = samba_write, - .write_room = samba_write_room, - .chars_in_buffer = samba_chars_in_buffer, - .write_bulk_callback = samba_write_bulk_callback, - .throttle = usb_serial_generic_throttle, - .unthrottle = usb_serial_generic_unthrottle, -}; - -static int __init samba_init(void) -{ - int retval; - - retval = usb_serial_register(&samba_device); - if (retval) - return retval; - - retval = usb_register(&samba_driver); - if (retval) { - usb_serial_deregister(&samba_device); - return retval; - } - - printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ": " - DRIVER_DESC "\n"); - return 0; -} - -static void __exit samba_exit(void) -{ - usb_deregister(&samba_driver); - usb_serial_deregister(&samba_device); -} - -module_init(samba_init); -module_exit(samba_exit); - -MODULE_AUTHOR(DRIVER_AUTHOR); -MODULE_DESCRIPTION(DRIVER_DESC); -MODULE_VERSION(DRIVER_VERSION); -MODULE_LICENSE("GPL"); - -module_param(debug, bool, S_IRUGO | S_IWUSR); -MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); |