Revert "USB: sam-ba: add driver for Atmel SAM Boot Assistant (SAM-BA)"

This reverts commit 90593899.

SAM-BA devices identify themselves CDC-ACM devices and should be using
the cdc-acm driver.

Since commit 5b239f0a (USB: cdc-acm: Add pseudo
modem without AT command capabilities) cdc-acm also binds to them.

Note that the Atmel SAM-BA tools expect to use a USB-serial driver and thus
require a symlink from /dev/ttyACMn to some /dev/ttyUSBm (with m < 30) to be
able to select the device. This is simply a UI-issue that should be
fixed by Atmel.

Tested with the SAM-BA 2.10 tools and an Atmel at91sam9260-ek.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Cc: Sven Köhler <sven.koehler@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/Kconfig

@@ -527,15 +527,6 @@ config USB_SERIAL_SAFE_PADDED
 	bool "USB Secure Encapsulated Driver - Padded"
 	depends on USB_SERIAL_SAFE
 
-config USB_SERIAL_SAMBA
-	tristate "USB Atmel SAM Boot Assistant (SAM-BA) driver"
-	help
-	  Say Y here if you want to access the SAM-BA boot application of an
-	  Atmel AT91SAM device.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called sam-ba.
-
 config USB_SERIAL_SIEMENS_MPI
 	tristate "USB Siemens MPI driver"
 	help

drivers/usb/serial/Makefile

@@ -48,7 +48,6 @@ obj-$(CONFIG_USB_SERIAL_PL2303)			+= pl2303.o
 obj-$(CONFIG_USB_SERIAL_QCAUX)			+= qcaux.o
 obj-$(CONFIG_USB_SERIAL_QUALCOMM)		+= qcserial.o
 obj-$(CONFIG_USB_SERIAL_SAFE)			+= safe_serial.o
-obj-$(CONFIG_USB_SERIAL_SAMBA)			+= sam-ba.o
 obj-$(CONFIG_USB_SERIAL_SIEMENS_MPI)		+= siemens_mpi.o
 obj-$(CONFIG_USB_SERIAL_SIERRAWIRELESS)		+= sierra.o
 obj-$(CONFIG_USB_SERIAL_SPCP8X5)		+= spcp8x5.o

drivers/usb/serial/sam-ba.c

-/*
- * 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");