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Release 4.14 drivers/bluetooth/bcm203x.c

Directory: drivers/bluetooth
/*
 *
 *  Broadcom Blutonium firmware driver
 *
 *  Copyright (C) 2003  Maxim Krasnyansky <maxk@qualcomm.com>
 *  Copyright (C) 2003  Marcel Holtmann <marcel@holtmann.org>
 *
 *
 *  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; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <linux/module.h>

#include <linux/atomic.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/errno.h>

#include <linux/device.h>
#include <linux/firmware.h>

#include <linux/usb.h>

#include <net/bluetooth/bluetooth.h>


#define VERSION "1.2"


static const struct usb_device_id bcm203x_table[] = {
	/* Broadcom Blutonium (BCM2033) */
	{ USB_DEVICE(0x0a5c, 0x2033) },

	{ }	/* Terminating entry */
};

MODULE_DEVICE_TABLE(usb, bcm203x_table);


#define BCM203X_ERROR		0

#define BCM203X_RESET		1

#define BCM203X_LOAD_MINIDRV	2

#define BCM203X_SELECT_MEMORY	3

#define BCM203X_CHECK_MEMORY	4

#define BCM203X_LOAD_FIRMWARE	5

#define BCM203X_CHECK_FIRMWARE	6


#define BCM203X_IN_EP		0x81

#define BCM203X_OUT_EP		0x02


struct bcm203x_data {
	
struct usb_device	*udev;

	
unsigned long		state;

	
struct work_struct	work;
	
atomic_t		shutdown;

	
struct urb		*urb;
	
unsigned char		*buffer;

	
unsigned char		*fw_data;
	
unsigned int		fw_size;
	
unsigned int		fw_sent;
};




static void bcm203x_complete(struct urb *urb)
{
	struct bcm203x_data *data = urb->context;
	struct usb_device *udev = urb->dev;
	int len;

	BT_DBG("udev %p urb %p", udev, urb);

	if (urb->status) {
		BT_ERR("URB failed with status %d", urb->status);
		data->state = BCM203X_ERROR;
		return;
	}

	switch (data->state) {
	case BCM203X_LOAD_MINIDRV:
		memcpy(data->buffer, "#", 1);

		usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
				data->buffer, 1, bcm203x_complete, data);

		data->state = BCM203X_SELECT_MEMORY;

		/* use workqueue to have a small delay */
		schedule_work(&data->work);
		break;

	case BCM203X_SELECT_MEMORY:
		usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
				data->buffer, 32, bcm203x_complete, data, 1);

		data->state = BCM203X_CHECK_MEMORY;

		if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
			BT_ERR("Can't submit URB");
		break;

	case BCM203X_CHECK_MEMORY:
		if (data->buffer[0] != '#') {
			BT_ERR("Memory select failed");
			data->state = BCM203X_ERROR;
			break;
		}

		data->state = BCM203X_LOAD_FIRMWARE;

	case BCM203X_LOAD_FIRMWARE:
		if (data->fw_sent == data->fw_size) {
			usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP),
				data->buffer, 32, bcm203x_complete, data, 1);

			data->state = BCM203X_CHECK_FIRMWARE;
		} else {
			len = min_t(uint, data->fw_size - data->fw_sent, 4096);

			usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
				data->fw_data + data->fw_sent, len, bcm203x_complete, data);

			data->fw_sent += len;
		}

		if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0)
			BT_ERR("Can't submit URB");
		break;

	case BCM203X_CHECK_FIRMWARE:
		if (data->buffer[0] != '.') {
			BT_ERR("Firmware loading failed");
			data->state = BCM203X_ERROR;
			break;
		}

		data->state = BCM203X_RESET;
		break;
	}
}


Contributors
PersonTokensPropCommitsCommitProp
Marcel Holtmann36999.73%375.00%


David Herrmann10.27%125.00%


Total370100.00%4100.00%






static void bcm203x_work(struct work_struct *work)
{
	struct bcm203x_data *data =
		container_of(work, struct bcm203x_data, work);

	if (atomic_read(&data->shutdown))
		return;

	if (usb_submit_urb(data->urb, GFP_KERNEL) < 0)
		BT_ERR("Can't submit URB");
}


Contributors
PersonTokensPropCommitsCommitProp
Marcel Holtmann3156.36%240.00%


David Howells1221.82%120.00%


David Herrmann1221.82%240.00%


Total55100.00%5100.00%






static int bcm203x_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
	const struct firmware *firmware;
	struct usb_device *udev = interface_to_usbdev(intf);
	struct bcm203x_data *data;
	int size;

	BT_DBG("intf %p id %p", intf, id);

	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
		return -ENODEV;

	data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	data->udev  = udev;
	data->state = BCM203X_LOAD_MINIDRV;

	data->urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!data->urb)
		return -ENOMEM;

	if (request_firmware(&firmware, "BCM2033-MD.hex", &udev->dev) < 0) {
		BT_ERR("Mini driver request failed");
		usb_free_urb(data->urb);
		return -EIO;
	}

	BT_DBG("minidrv data %p size %zu", firmware->data, firmware->size);

	size = max_t(uint, firmware->size, 4096);

	data->buffer = kmalloc(size, GFP_KERNEL);
	if (!data->buffer) {
		BT_ERR("Can't allocate memory for mini driver");
		release_firmware(firmware);
		usb_free_urb(data->urb);
		return -ENOMEM;
	}

	memcpy(data->buffer, firmware->data, firmware->size);

	usb_fill_bulk_urb(data->urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP),
			data->buffer, firmware->size, bcm203x_complete, data);

	release_firmware(firmware);

	if (request_firmware(&firmware, "BCM2033-FW.bin", &udev->dev) < 0) {
		BT_ERR("Firmware request failed");
		usb_free_urb(data->urb);
		kfree(data->buffer);
		return -EIO;
	}

	BT_DBG("firmware data %p size %zu", firmware->data, firmware->size);

	data->fw_data = kmemdup(firmware->data, firmware->size, GFP_KERNEL);
	if (!data->fw_data) {
		BT_ERR("Can't allocate memory for firmware image");
		release_firmware(firmware);
		usb_free_urb(data->urb);
		kfree(data->buffer);
		return -ENOMEM;
	}

	data->fw_size = firmware->size;
	data->fw_sent = 0;

	release_firmware(firmware);

	INIT_WORK(&data->work, bcm203x_work);

	usb_set_intfdata(intf, data);

	/* use workqueue to have a small delay */
	schedule_work(&data->work);

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Marcel Holtmann41796.08%555.56%


Sachin Kamat61.38%111.11%


Julia Lawall51.15%111.11%


Magnus Damm51.15%111.11%


David Herrmann10.23%111.11%


Total434100.00%9100.00%






static void bcm203x_disconnect(struct usb_interface *intf)
{
	struct bcm203x_data *data = usb_get_intfdata(intf);

	BT_DBG("intf %p", intf);

	atomic_inc(&data->shutdown);
	cancel_work_sync(&data->work);

	usb_kill_urb(data->urb);

	usb_set_intfdata(intf, NULL);

	usb_free_urb(data->urb);
	kfree(data->fw_data);
	kfree(data->buffer);
}


Contributors
PersonTokensPropCommitsCommitProp
Marcel Holtmann6379.75%375.00%


David Herrmann1620.25%125.00%


Total79100.00%4100.00%




static struct usb_driver bcm203x_driver = {
	.name		= "bcm203x",
	.probe		= bcm203x_probe,
	.disconnect	= bcm203x_disconnect,
	.id_table	= bcm203x_table,
	.disable_hub_initiated_lpm = 1,
};


module_usb_driver(bcm203x_driver);

MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION);

MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL");
MODULE_FIRMWARE("BCM2033-MD.hex");
MODULE_FIRMWARE("BCM2033-FW.bin");

Overall Contributors
PersonTokensPropCommitsCommitProp
Marcel Holtmann108193.76%1052.63%


David Herrmann363.12%210.53%


David Howells121.04%15.26%


Sachin Kamat60.52%15.26%


Magnus Damm50.43%15.26%


Julia Lawall50.43%15.26%


Sarah Sharp50.43%15.26%


Greg Kroah-Hartman20.17%15.26%


Márton Németh10.09%15.26%


Total1153100.00%19100.00%


Directory: drivers/bluetooth



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