linux_dsm_epyc7002/drivers/bluetooth/bcm203x.c
Sarah Sharp e1f12eb6ba USB: Disable hub-initiated LPM for comms devices.
Hub-initiated LPM is not good for USB communications devices.  Comms
devices should be able to tell when their link can go into a lower power
state, because they know when an incoming transmission is finished.
Ideally, these devices would slam their links into a lower power state,
using the device-initiated LPM, after finishing the last packet of their
data transfer.

If we enable the idle timeouts for the parent hubs to enable
hub-initiated LPM, we will get a lot of useless LPM packets on the bus
as the devices reject LPM transitions when they're in the middle of
receiving data.  Worse, some devices might blindly accept the
hub-initiated LPM and power down their radios while they're in the
middle of receiving a transmission.

The Intel Windows folks are disabling hub-initiated LPM for all USB
communications devices under a xHCI USB 3.0 host.  In order to keep
the Linux behavior as close as possible to Windows, we need to do the
same in Linux.

Set the disable_hub_initiated_lpm flag for for all USB communications
drivers.  I know there aren't currently any USB 3.0 devices that
implement these class specifications, but we should be ready if they do.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: Gustavo Padovan <gustavo@padovan.org>
Cc: Johan Hedberg <johan.hedberg@gmail.com>
Cc: Hansjoerg Lipp <hjlipp@web.de>
Cc: Tilman Schmidt <tilman@imap.cc>
Cc: Karsten Keil <isdn@linux-pingi.de>
Cc: Peter Korsgaard <jacmet@sunsite.dk>
Cc: Jan Dumon <j.dumon@option.com>
Cc: Petko Manolov <petkan@users.sourceforge.net>
Cc: Steve Glendinning <steve.glendinning@smsc.com>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: Kalle Valo <kvalo@qca.qualcomm.com>
Cc: "Luis R. Rodriguez" <mcgrof@qca.qualcomm.com>
Cc: Jouni Malinen <jouni@qca.qualcomm.com>
Cc: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
Cc: Senthil Balasubramanian <senthilb@qca.qualcomm.com>
Cc: Christian Lamparter <chunkeey@googlemail.com>
Cc: Brett Rudley <brudley@broadcom.com>
Cc: Roland Vossen <rvossen@broadcom.com>
Cc: Arend van Spriel <arend@broadcom.com>
Cc: "Franky (Zhenhui) Lin" <frankyl@broadcom.com>
Cc: Kan Yan <kanyan@broadcom.com>
Cc: Dan Williams <dcbw@redhat.com>
Cc: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Cc: Ivo van Doorn <IvDoorn@gmail.com>
Cc: Gertjan van Wingerde <gwingerde@gmail.com>
Cc: Helmut Schaa <helmut.schaa@googlemail.com>
Cc: Herton Ronaldo Krzesinski <herton@canonical.com>
Cc: Hin-Tak Leung <htl10@users.sourceforge.net>
Cc: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Chaoming Li <chaoming_li@realsil.com.cn>
Cc: Daniel Drake <dsd@gentoo.org>
Cc: Ulrich Kunitz <kune@deine-taler.de>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
2012-05-18 15:42:55 -07:00

293 lines
6.8 KiB
C

/*
*
* 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;
}
}
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");
}
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 = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data) {
BT_ERR("Can't allocate memory for data structure");
return -ENOMEM;
}
data->udev = udev;
data->state = BCM203X_LOAD_MINIDRV;
data->urb = usb_alloc_urb(0, GFP_KERNEL);
if (!data->urb) {
BT_ERR("Can't allocate URB");
kfree(data);
return -ENOMEM;
}
if (request_firmware(&firmware, "BCM2033-MD.hex", &udev->dev) < 0) {
BT_ERR("Mini driver request failed");
usb_free_urb(data->urb);
kfree(data);
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);
kfree(data);
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);
kfree(data);
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);
kfree(data);
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;
}
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);
kfree(data);
}
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");