linux/drivers/net/wireless/p54/p54usb.c

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/*
* Linux device driver for USB based Prism54
*
* Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
*
* Based on the islsm (softmac prism54) driver, which is:
* Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
*
* 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/init.h>
#include <linux/usb.h>
#include <linux/pci.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
#include <linux/slab.h>
#include <linux/firmware.h>
#include <linux/etherdevice.h>
#include <linux/delay.h>
#include <linux/crc32.h>
#include <linux/module.h>
#include <net/mac80211.h>
#include "p54.h"
#include "lmac.h"
#include "p54usb.h"
MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
MODULE_DESCRIPTION("Prism54 USB wireless driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("prism54usb");
MODULE_FIRMWARE("isl3886usb");
MODULE_FIRMWARE("isl3887usb");
/*
* Note:
*
* Always update our wiki's device list (located at:
* http://wireless.kernel.org/en/users/Drivers/p54/devices ),
* whenever you add a new device.
*/
static struct usb_device_id p54u_table[] = {
/* Version 1 devices (pci chip + net2280) */
{USB_DEVICE(0x0411, 0x0050)}, /* Buffalo WLI2-USB2-G54 */
{USB_DEVICE(0x045e, 0x00c2)}, /* Microsoft MN-710 */
{USB_DEVICE(0x0506, 0x0a11)}, /* 3COM 3CRWE254G72 */
{USB_DEVICE(0x0675, 0x0530)}, /* DrayTek Vigor 530 */
{USB_DEVICE(0x06b9, 0x0120)}, /* Thomson SpeedTouch 120g */
{USB_DEVICE(0x0707, 0xee06)}, /* SMC 2862W-G */
{USB_DEVICE(0x07aa, 0x001c)}, /* Corega CG-WLUSB2GT */
{USB_DEVICE(0x083a, 0x4501)}, /* Accton 802.11g WN4501 USB */
{USB_DEVICE(0x083a, 0x4502)}, /* Siemens Gigaset USB Adapter */
{USB_DEVICE(0x083a, 0x5501)}, /* Phillips CPWUA054 */
{USB_DEVICE(0x0846, 0x4200)}, /* Netgear WG121 */
{USB_DEVICE(0x0846, 0x4210)}, /* Netgear WG121 the second ? */
{USB_DEVICE(0x0846, 0x4220)}, /* Netgear WG111 */
{USB_DEVICE(0x09aa, 0x1000)}, /* Spinnaker Proto board */
{USB_DEVICE(0x0bf8, 0x1007)}, /* Fujitsu E-5400 USB */
{USB_DEVICE(0x0cde, 0x0006)}, /* Medion 40900, Roper Europe */
{USB_DEVICE(0x0db0, 0x6826)}, /* MSI UB54G (MS-6826) */
{USB_DEVICE(0x107b, 0x55f2)}, /* Gateway WGU-210 (Gemtek) */
{USB_DEVICE(0x124a, 0x4023)}, /* Shuttle PN15, Airvast WM168g, IOGear GWU513 */
{USB_DEVICE(0x1435, 0x0210)}, /* Inventel UR054G */
{USB_DEVICE(0x15a9, 0x0002)}, /* Gemtek WUBI-100GW 802.11g */
{USB_DEVICE(0x1630, 0x0005)}, /* 2Wire 802.11g USB (v1) / Z-Com */
{USB_DEVICE(0x182d, 0x096b)}, /* Sitecom WL-107 */
{USB_DEVICE(0x1915, 0x2234)}, /* Linksys WUSB54G OEM */
{USB_DEVICE(0x1915, 0x2235)}, /* Linksys WUSB54G Portable OEM */
{USB_DEVICE(0x2001, 0x3701)}, /* DLink DWL-G120 Spinnaker */
{USB_DEVICE(0x2001, 0x3703)}, /* DLink DWL-G122 */
{USB_DEVICE(0x2001, 0x3762)}, /* Conceptronic C54U */
{USB_DEVICE(0x5041, 0x2234)}, /* Linksys WUSB54G */
{USB_DEVICE(0x5041, 0x2235)}, /* Linksys WUSB54G Portable */
/* Version 2 devices (3887) */
{USB_DEVICE(0x0471, 0x1230)}, /* Philips CPWUA054/00 */
{USB_DEVICE(0x050d, 0x7050)}, /* Belkin F5D7050 ver 1000 */
{USB_DEVICE(0x0572, 0x2000)}, /* Cohiba Proto board */
{USB_DEVICE(0x0572, 0x2002)}, /* Cohiba Proto board */
{USB_DEVICE(0x06a9, 0x000e)}, /* Westell 802.11g USB (A90-211WG-01) */
{USB_DEVICE(0x06b9, 0x0121)}, /* Thomson SpeedTouch 121g */
{USB_DEVICE(0x0707, 0xee13)}, /* SMC 2862W-G version 2 */
{USB_DEVICE(0x07aa, 0x0020)}, /* Corega WLUSB2GTST USB */
{USB_DEVICE(0x0803, 0x4310)}, /* Zoom 4410a */
{USB_DEVICE(0x083a, 0x4521)}, /* Siemens Gigaset USB Adapter 54 version 2 */
{USB_DEVICE(0x083a, 0x4531)}, /* T-Com Sinus 154 data II */
{USB_DEVICE(0x083a, 0xc501)}, /* Zoom Wireless-G 4410 */
{USB_DEVICE(0x083a, 0xf503)}, /* Accton FD7050E ver 1010ec */
{USB_DEVICE(0x0846, 0x4240)}, /* Netgear WG111 (v2) */
{USB_DEVICE(0x0915, 0x2000)}, /* Cohiba Proto board */
{USB_DEVICE(0x0915, 0x2002)}, /* Cohiba Proto board */
{USB_DEVICE(0x0baf, 0x0118)}, /* U.S. Robotics U5 802.11g Adapter*/
{USB_DEVICE(0x0bf8, 0x1009)}, /* FUJITSU E-5400 USB D1700*/
/* {USB_DEVICE(0x0cde, 0x0006)}, * Medion MD40900 already listed above,
* just noting it here for clarity */
{USB_DEVICE(0x0cde, 0x0008)}, /* Sagem XG703A */
{USB_DEVICE(0x0cde, 0x0015)}, /* Zcomax XG-705A */
{USB_DEVICE(0x0d8e, 0x3762)}, /* DLink DWL-G120 Cohiba */
{USB_DEVICE(0x124a, 0x4025)}, /* IOGear GWU513 (GW3887IK chip) */
{USB_DEVICE(0x1260, 0xee22)}, /* SMC 2862W-G version 2 */
{USB_DEVICE(0x13b1, 0x000a)}, /* Linksys WUSB54G ver 2 */
{USB_DEVICE(0x13B1, 0x000C)}, /* Linksys WUSB54AG */
{USB_DEVICE(0x1413, 0x5400)}, /* Telsey 802.11g USB2.0 Adapter */
{USB_DEVICE(0x1435, 0x0427)}, /* Inventel UR054G */
/* {USB_DEVICE(0x15a9, 0x0002)}, * Also SparkLAN WL-682 with 3887 */
{USB_DEVICE(0x1668, 0x1050)}, /* Actiontec 802UIG-1 */
{USB_DEVICE(0x1740, 0x1000)}, /* Senao NUB-350 */
{USB_DEVICE(0x2001, 0x3704)}, /* DLink DWL-G122 rev A2 */
{USB_DEVICE(0x2001, 0x3705)}, /* D-Link DWL-G120 rev C1 */
{USB_DEVICE(0x413c, 0x5513)}, /* Dell WLA3310 USB Wireless Adapter */
{USB_DEVICE(0x413c, 0x8102)}, /* Spinnaker DUT */
{USB_DEVICE(0x413c, 0x8104)}, /* Cohiba Proto board */
{}
};
MODULE_DEVICE_TABLE(usb, p54u_table);
static const struct {
u32 intf;
enum p54u_hw_type type;
const char *fw;
char hw[20];
} p54u_fwlist[__NUM_P54U_HWTYPES] = {
{
.type = P54U_NET2280,
.intf = FW_LM86,
.fw = "isl3886usb",
.hw = "ISL3886 + net2280",
},
{
.type = P54U_3887,
.intf = FW_LM87,
.fw = "isl3887usb",
.hw = "ISL3887",
},
};
static void p54u_rx_cb(struct urb *urb)
{
struct sk_buff *skb = (struct sk_buff *) urb->context;
struct p54u_rx_info *info = (struct p54u_rx_info *)skb->cb;
struct ieee80211_hw *dev = info->dev;
struct p54u_priv *priv = dev->priv;
skb_unlink(skb, &priv->rx_queue);
if (unlikely(urb->status)) {
dev_kfree_skb_irq(skb);
return;
}
skb_put(skb, urb->actual_length);
if (priv->hw_type == P54U_NET2280)
skb_pull(skb, priv->common.tx_hdr_len);
if (priv->common.fw_interface == FW_LM87) {
skb_pull(skb, 4);
skb_put(skb, 4);
}
if (p54_rx(dev, skb)) {
skb = dev_alloc_skb(priv->common.rx_mtu + 32);
if (unlikely(!skb)) {
/* TODO check rx queue length and refill *somewhere* */
return;
}
info = (struct p54u_rx_info *) skb->cb;
info->urb = urb;
info->dev = dev;
urb->transfer_buffer = skb_tail_pointer(skb);
urb->context = skb;
} else {
if (priv->hw_type == P54U_NET2280)
skb_push(skb, priv->common.tx_hdr_len);
if (priv->common.fw_interface == FW_LM87) {
skb_push(skb, 4);
skb_put(skb, 4);
}
skb_reset_tail_pointer(skb);
skb_trim(skb, 0);
urb->transfer_buffer = skb_tail_pointer(skb);
}
skb_queue_tail(&priv->rx_queue, skb);
usb_anchor_urb(urb, &priv->submitted);
if (usb_submit_urb(urb, GFP_ATOMIC)) {
skb_unlink(skb, &priv->rx_queue);
usb_unanchor_urb(urb);
dev_kfree_skb_irq(skb);
}
}
static void p54u_tx_cb(struct urb *urb)
{
struct sk_buff *skb = urb->context;
struct ieee80211_hw *dev =
usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
p54_free_skb(dev, skb);
}
static void p54u_tx_dummy_cb(struct urb *urb) { }
static void p54u_free_urbs(struct ieee80211_hw *dev)
{
struct p54u_priv *priv = dev->priv;
usb_kill_anchored_urbs(&priv->submitted);
}
static void p54u_stop(struct ieee80211_hw *dev)
{
/*
* TODO: figure out how to reliably stop the 3887 and net2280 so
* the hardware is still usable next time we want to start it.
* until then, we just stop listening to the hardware..
*/
p54u_free_urbs(dev);
}
static int p54u_init_urbs(struct ieee80211_hw *dev)
{
struct p54u_priv *priv = dev->priv;
struct urb *entry = NULL;
struct sk_buff *skb;
struct p54u_rx_info *info;
int ret = 0;
while (skb_queue_len(&priv->rx_queue) < 32) {
skb = __dev_alloc_skb(priv->common.rx_mtu + 32, GFP_KERNEL);
if (!skb) {
ret = -ENOMEM;
goto err;
}
entry = usb_alloc_urb(0, GFP_KERNEL);
if (!entry) {
ret = -ENOMEM;
goto err;
}
usb_fill_bulk_urb(entry, priv->udev,
usb_rcvbulkpipe(priv->udev, P54U_PIPE_DATA),
skb_tail_pointer(skb),
priv->common.rx_mtu + 32, p54u_rx_cb, skb);
info = (struct p54u_rx_info *) skb->cb;
info->urb = entry;
info->dev = dev;
skb_queue_tail(&priv->rx_queue, skb);
usb_anchor_urb(entry, &priv->submitted);
ret = usb_submit_urb(entry, GFP_KERNEL);
if (ret) {
skb_unlink(skb, &priv->rx_queue);
usb_unanchor_urb(entry);
goto err;
}
usb_free_urb(entry);
entry = NULL;
}
return 0;
err:
usb_free_urb(entry);
kfree_skb(skb);
p54u_free_urbs(dev);
return ret;
}
static int p54u_open(struct ieee80211_hw *dev)
{
/*
* TODO: Because we don't know how to reliably stop the 3887 and
* the isl3886+net2280, other than brutally cut off all
* communications. We have to reinitialize the urbs on every start.
*/
return p54u_init_urbs(dev);
}
static __le32 p54u_lm87_chksum(const __le32 *data, size_t length)
{
p54: Fix sparse warnings The command make C=2 CF="-D__CHECK_ENDIAN__" drivers/net/wireless/p54/ generates the following warnings: .../p54common.c:152:38: warning: incorrect type in argument 1 (different base types) .../p54common.c:152:38: expected restricted __be32 const [usertype] *p .../p54common.c:152:38: got unsigned int *<noident> .../p54common.c:184:15: warning: restricted __le32 degrades to integer .../p54common.c:185:29: warning: cast to restricted __le16 .../p54common.c:309:11: warning: symbol 'p54_rf_chips' was not declared. Should it be static? .../p54common.c:313:5: warning: symbol 'p54_parse_eeprom' was not declared. Should it be static? .../p54common.c:620:43: warning: incorrect type in argument 3 (different base types) .../p54common.c:620:43: expected unsigned long [unsigned] [usertype] len .../p54common.c:620:43: got restricted __le16 [usertype] len .../p54common.c:780:41: warning: restricted __le16 degrades to integer .../p54common.c:781:32: warning: restricted __le16 degrades to integer .../p54common.c:1250:28: warning: incorrect type in argument 2 (different base types) .../p54common.c:1250:28: expected unsigned short [unsigned] [usertype] filter_type .../p54common.c:1250:28: got restricted __le16 [usertype] filter_type .../p54common.c:1252:28: warning: incorrect type in argument 2 (different base types) .../p54common.c:1252:28: expected unsigned short [unsigned] [usertype] filter_type .../p54common.c:1252:28: got restricted __le16 [usertype] filter_type .../p54common.c:1257:42: warning: incorrect type in argument 2 (different base types) .../p54common.c:1257:42: expected unsigned short [unsigned] [usertype] filter_type .../p54common.c:1257:42: got restricted __le16 .../p54common.c:1260:42: warning: incorrect type in argument 2 (different base types) .../p54common.c:1260:42: expected unsigned short [unsigned] [usertype] filter_type .../p54common.c:1260:42: got restricted __le16 .../p54usb.c:228:10: warning: restricted __le32 degrades to integer .../p54usb.c:228:23: warning: restricted __le32 degrades to integer .../p54usb.c:228:7: warning: incorrect type in assignment (different base types) .../p54usb.c:228:7: expected restricted __le32 [assigned] [usertype] chk .../p54usb.c:228:7: got unsigned int .../p54usb.c:221:8: warning: symbol 'p54u_lm87_chksum' was not declared. Should it be static? All of the above have been fixed. One question, however, remains: In struct bootrec, the array "data" is treated in many places as native CPU order, but it may be little-endian everywhere. As far as I can tell, this driver has only been used with little-endian hardware. Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-09-25 19:54:28 +00:00
u32 chk = 0;
length >>= 2;
while (length--) {
chk ^= le32_to_cpu(*data++);
chk = (chk >> 5) ^ (chk << 3);
}
p54: Fix sparse warnings The command make C=2 CF="-D__CHECK_ENDIAN__" drivers/net/wireless/p54/ generates the following warnings: .../p54common.c:152:38: warning: incorrect type in argument 1 (different base types) .../p54common.c:152:38: expected restricted __be32 const [usertype] *p .../p54common.c:152:38: got unsigned int *<noident> .../p54common.c:184:15: warning: restricted __le32 degrades to integer .../p54common.c:185:29: warning: cast to restricted __le16 .../p54common.c:309:11: warning: symbol 'p54_rf_chips' was not declared. Should it be static? .../p54common.c:313:5: warning: symbol 'p54_parse_eeprom' was not declared. Should it be static? .../p54common.c:620:43: warning: incorrect type in argument 3 (different base types) .../p54common.c:620:43: expected unsigned long [unsigned] [usertype] len .../p54common.c:620:43: got restricted __le16 [usertype] len .../p54common.c:780:41: warning: restricted __le16 degrades to integer .../p54common.c:781:32: warning: restricted __le16 degrades to integer .../p54common.c:1250:28: warning: incorrect type in argument 2 (different base types) .../p54common.c:1250:28: expected unsigned short [unsigned] [usertype] filter_type .../p54common.c:1250:28: got restricted __le16 [usertype] filter_type .../p54common.c:1252:28: warning: incorrect type in argument 2 (different base types) .../p54common.c:1252:28: expected unsigned short [unsigned] [usertype] filter_type .../p54common.c:1252:28: got restricted __le16 [usertype] filter_type .../p54common.c:1257:42: warning: incorrect type in argument 2 (different base types) .../p54common.c:1257:42: expected unsigned short [unsigned] [usertype] filter_type .../p54common.c:1257:42: got restricted __le16 .../p54common.c:1260:42: warning: incorrect type in argument 2 (different base types) .../p54common.c:1260:42: expected unsigned short [unsigned] [usertype] filter_type .../p54common.c:1260:42: got restricted __le16 .../p54usb.c:228:10: warning: restricted __le32 degrades to integer .../p54usb.c:228:23: warning: restricted __le32 degrades to integer .../p54usb.c:228:7: warning: incorrect type in assignment (different base types) .../p54usb.c:228:7: expected restricted __le32 [assigned] [usertype] chk .../p54usb.c:228:7: got unsigned int .../p54usb.c:221:8: warning: symbol 'p54u_lm87_chksum' was not declared. Should it be static? All of the above have been fixed. One question, however, remains: In struct bootrec, the array "data" is treated in many places as native CPU order, but it may be little-endian everywhere. As far as I can tell, this driver has only been used with little-endian hardware. Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-09-25 19:54:28 +00:00
return cpu_to_le32(chk);
}
static void p54u_tx_lm87(struct ieee80211_hw *dev, struct sk_buff *skb)
{
struct p54u_priv *priv = dev->priv;
struct urb *data_urb;
struct lm87_tx_hdr *hdr = (void *)skb->data - sizeof(*hdr);
data_urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!data_urb) {
p54_free_skb(dev, skb);
return;
}
hdr->chksum = p54u_lm87_chksum((__le32 *)skb->data, skb->len);
hdr->device_addr = ((struct p54_hdr *)skb->data)->req_id;
usb_fill_bulk_urb(data_urb, priv->udev,
usb_sndbulkpipe(priv->udev, P54U_PIPE_DATA),
hdr, skb->len + sizeof(*hdr), FREE_AFTER_TX(skb) ?
p54u_tx_cb : p54u_tx_dummy_cb, skb);
data_urb->transfer_flags |= URB_ZERO_PACKET;
usb_anchor_urb(data_urb, &priv->submitted);
if (usb_submit_urb(data_urb, GFP_ATOMIC)) {
usb_unanchor_urb(data_urb);
p54_free_skb(dev, skb);
}
usb_free_urb(data_urb);
}
static void p54u_tx_net2280(struct ieee80211_hw *dev, struct sk_buff *skb)
{
struct p54u_priv *priv = dev->priv;
struct urb *int_urb = NULL, *data_urb = NULL;
struct net2280_tx_hdr *hdr = (void *)skb->data - sizeof(*hdr);
struct net2280_reg_write *reg = NULL;
int err = -ENOMEM;
reg = kmalloc(sizeof(*reg), GFP_ATOMIC);
if (!reg)
goto out;
int_urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!int_urb)
goto out;
data_urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!data_urb)
goto out;
reg->port = cpu_to_le16(NET2280_DEV_U32);
reg->addr = cpu_to_le32(P54U_DEV_BASE);
reg->val = cpu_to_le32(ISL38XX_DEV_INT_DATA);
memset(hdr, 0, sizeof(*hdr));
hdr->len = cpu_to_le16(skb->len);
hdr->device_addr = ((struct p54_hdr *) skb->data)->req_id;
usb_fill_bulk_urb(int_urb, priv->udev,
usb_sndbulkpipe(priv->udev, P54U_PIPE_DEV), reg, sizeof(*reg),
p54u_tx_dummy_cb, dev);
/*
* URB_FREE_BUFFER triggers a code path in the USB subsystem that will
* free what is inside the transfer_buffer after the last reference to
* the int_urb is dropped.
*/
int_urb->transfer_flags |= URB_FREE_BUFFER | URB_ZERO_PACKET;
reg = NULL;
usb_fill_bulk_urb(data_urb, priv->udev,
usb_sndbulkpipe(priv->udev, P54U_PIPE_DATA),
hdr, skb->len + sizeof(*hdr), FREE_AFTER_TX(skb) ?
p54u_tx_cb : p54u_tx_dummy_cb, skb);
data_urb->transfer_flags |= URB_ZERO_PACKET;
usb_anchor_urb(int_urb, &priv->submitted);
err = usb_submit_urb(int_urb, GFP_ATOMIC);
if (err) {
usb_unanchor_urb(int_urb);
goto out;
}
usb_anchor_urb(data_urb, &priv->submitted);
err = usb_submit_urb(data_urb, GFP_ATOMIC);
if (err) {
usb_unanchor_urb(data_urb);
goto out;
}
out:
usb_free_urb(int_urb);
usb_free_urb(data_urb);
if (err) {
kfree(reg);
p54_free_skb(dev, skb);
}
}
static int p54u_write(struct p54u_priv *priv,
struct net2280_reg_write *buf,
enum net2280_op_type type,
__le32 addr, __le32 val)
{
unsigned int ep;
int alen;
if (type & 0x0800)
ep = usb_sndbulkpipe(priv->udev, P54U_PIPE_DEV);
else
ep = usb_sndbulkpipe(priv->udev, P54U_PIPE_BRG);
buf->port = cpu_to_le16(type);
buf->addr = addr;
buf->val = val;
return usb_bulk_msg(priv->udev, ep, buf, sizeof(*buf), &alen, 1000);
}
static int p54u_read(struct p54u_priv *priv, void *buf,
enum net2280_op_type type,
__le32 addr, __le32 *val)
{
struct net2280_reg_read *read = buf;
__le32 *reg = buf;
unsigned int ep;
int alen, err;
if (type & 0x0800)
ep = P54U_PIPE_DEV;
else
ep = P54U_PIPE_BRG;
read->port = cpu_to_le16(type);
read->addr = addr;
err = usb_bulk_msg(priv->udev, usb_sndbulkpipe(priv->udev, ep),
read, sizeof(*read), &alen, 1000);
if (err)
return err;
err = usb_bulk_msg(priv->udev, usb_rcvbulkpipe(priv->udev, ep),
reg, sizeof(*reg), &alen, 1000);
if (err)
return err;
*val = *reg;
return 0;
}
static int p54u_bulk_msg(struct p54u_priv *priv, unsigned int ep,
void *data, size_t len)
{
int alen;
return usb_bulk_msg(priv->udev, usb_sndbulkpipe(priv->udev, ep),
data, len, &alen, 2000);
}
static int p54u_device_reset(struct ieee80211_hw *dev)
{
struct p54u_priv *priv = dev->priv;
int ret, lock = (priv->intf->condition != USB_INTERFACE_BINDING);
if (lock) {
ret = usb_lock_device_for_reset(priv->udev, priv->intf);
if (ret < 0) {
dev_err(&priv->udev->dev, "(p54usb) unable to lock "
"device for reset (%d)!\n", ret);
return ret;
}
}
ret = usb_reset_device(priv->udev);
if (lock)
usb_unlock_device(priv->udev);
if (ret)
dev_err(&priv->udev->dev, "(p54usb) unable to reset "
"device (%d)!\n", ret);
return ret;
}
static const char p54u_romboot_3887[] = "~~~~";
static int p54u_firmware_reset_3887(struct ieee80211_hw *dev)
{
struct p54u_priv *priv = dev->priv;
u8 *buf;
int ret;
buf = kmemdup(p54u_romboot_3887, 4, GFP_KERNEL);
if (!buf)
return -ENOMEM;
ret = p54u_bulk_msg(priv, P54U_PIPE_DATA,
buf, 4);
kfree(buf);
if (ret)
dev_err(&priv->udev->dev, "(p54usb) unable to jump to "
"boot ROM (%d)!\n", ret);
return ret;
}
static const char p54u_firmware_upload_3887[] = "<\r";
static int p54u_upload_firmware_3887(struct ieee80211_hw *dev)
{
struct p54u_priv *priv = dev->priv;
int err, alen;
u8 carry = 0;
u8 *buf, *tmp;
const u8 *data;
unsigned int left, remains, block_size;
struct x2_header *hdr;
unsigned long timeout;
err = p54u_firmware_reset_3887(dev);
if (err)
return err;
tmp = buf = kmalloc(P54U_FW_BLOCK, GFP_KERNEL);
if (!buf)
return -ENOMEM;
left = block_size = min((size_t)P54U_FW_BLOCK, priv->fw->size);
strcpy(buf, p54u_firmware_upload_3887);
left -= strlen(p54u_firmware_upload_3887);
tmp += strlen(p54u_firmware_upload_3887);
data = priv->fw->data;
remains = priv->fw->size;
hdr = (struct x2_header *)(buf + strlen(p54u_firmware_upload_3887));
memcpy(hdr->signature, X2_SIGNATURE, X2_SIGNATURE_SIZE);
hdr->fw_load_addr = cpu_to_le32(ISL38XX_DEV_FIRMWARE_ADDR);
hdr->fw_length = cpu_to_le32(priv->fw->size);
hdr->crc = cpu_to_le32(~crc32_le(~0, (void *)&hdr->fw_load_addr,
sizeof(u32)*2));
left -= sizeof(*hdr);
tmp += sizeof(*hdr);
while (remains) {
while (left--) {
if (carry) {
*tmp++ = carry;
carry = 0;
remains--;
continue;
}
switch (*data) {
case '~':
*tmp++ = '}';
carry = '^';
break;
case '}':
*tmp++ = '}';
carry = ']';
break;
default:
*tmp++ = *data;
remains--;
break;
}
data++;
}
err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, block_size);
if (err) {
dev_err(&priv->udev->dev, "(p54usb) firmware "
"upload failed!\n");
goto err_upload_failed;
}
tmp = buf;
left = block_size = min((unsigned int)P54U_FW_BLOCK, remains);
}
*((__le32 *)buf) = cpu_to_le32(~crc32_le(~0, priv->fw->data,
priv->fw->size));
err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, sizeof(u32));
if (err) {
dev_err(&priv->udev->dev, "(p54usb) firmware upload failed!\n");
goto err_upload_failed;
}
timeout = jiffies + msecs_to_jiffies(1000);
while (!(err = usb_bulk_msg(priv->udev,
usb_rcvbulkpipe(priv->udev, P54U_PIPE_DATA), buf, 128, &alen, 1000))) {
if (alen > 2 && !memcmp(buf, "OK", 2))
break;
if (alen > 5 && !memcmp(buf, "ERROR", 5)) {
err = -EINVAL;
break;
}
if (time_after(jiffies, timeout)) {
dev_err(&priv->udev->dev, "(p54usb) firmware boot "
"timed out!\n");
err = -ETIMEDOUT;
break;
}
}
if (err) {
dev_err(&priv->udev->dev, "(p54usb) firmware upload failed!\n");
goto err_upload_failed;
}
buf[0] = 'g';
buf[1] = '\r';
err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, 2);
if (err) {
dev_err(&priv->udev->dev, "(p54usb) firmware boot failed!\n");
goto err_upload_failed;
}
timeout = jiffies + msecs_to_jiffies(1000);
while (!(err = usb_bulk_msg(priv->udev,
usb_rcvbulkpipe(priv->udev, P54U_PIPE_DATA), buf, 128, &alen, 1000))) {
if (alen > 0 && buf[0] == 'g')
break;
if (time_after(jiffies, timeout)) {
err = -ETIMEDOUT;
break;
}
}
if (err)
goto err_upload_failed;
err_upload_failed:
kfree(buf);
return err;
}
static int p54u_upload_firmware_net2280(struct ieee80211_hw *dev)
{
struct p54u_priv *priv = dev->priv;
const struct p54p_csr *devreg = (const struct p54p_csr *) P54U_DEV_BASE;
int err, alen;
void *buf;
__le32 reg;
unsigned int remains, offset;
const u8 *data;
buf = kmalloc(512, GFP_KERNEL);
if (!buf)
return -ENOMEM;
#define P54U_WRITE(type, addr, data) \
do {\
err = p54u_write(priv, buf, type,\
cpu_to_le32((u32)(unsigned long)addr), data);\
if (err) \
goto fail;\
} while (0)
#define P54U_READ(type, addr) \
do {\
err = p54u_read(priv, buf, type,\
cpu_to_le32((u32)(unsigned long)addr), &reg);\
if (err)\
goto fail;\
} while (0)
/* power down net2280 bridge */
P54U_READ(NET2280_BRG_U32, NET2280_GPIOCTL);
reg |= cpu_to_le32(P54U_BRG_POWER_DOWN);
reg &= cpu_to_le32(~P54U_BRG_POWER_UP);
P54U_WRITE(NET2280_BRG_U32, NET2280_GPIOCTL, reg);
mdelay(100);
/* power up bridge */
reg |= cpu_to_le32(P54U_BRG_POWER_UP);
reg &= cpu_to_le32(~P54U_BRG_POWER_DOWN);
P54U_WRITE(NET2280_BRG_U32, NET2280_GPIOCTL, reg);
mdelay(100);
P54U_WRITE(NET2280_BRG_U32, NET2280_DEVINIT,
cpu_to_le32(NET2280_CLK_30Mhz |
NET2280_PCI_ENABLE |
NET2280_PCI_SOFT_RESET));
mdelay(20);
P54U_WRITE(NET2280_BRG_CFG_U16, PCI_COMMAND,
cpu_to_le32(PCI_COMMAND_MEMORY |
PCI_COMMAND_MASTER));
P54U_WRITE(NET2280_BRG_CFG_U32, PCI_BASE_ADDRESS_0,
cpu_to_le32(NET2280_BASE));
P54U_READ(NET2280_BRG_CFG_U16, PCI_STATUS);
reg |= cpu_to_le32(PCI_STATUS_REC_MASTER_ABORT);
P54U_WRITE(NET2280_BRG_CFG_U16, PCI_STATUS, reg);
// TODO: we really need this?
P54U_READ(NET2280_BRG_U32, NET2280_RELNUM);
P54U_WRITE(NET2280_BRG_U32, NET2280_EPA_RSP,
cpu_to_le32(NET2280_CLEAR_NAK_OUT_PACKETS_MODE));
P54U_WRITE(NET2280_BRG_U32, NET2280_EPC_RSP,
cpu_to_le32(NET2280_CLEAR_NAK_OUT_PACKETS_MODE));
P54U_WRITE(NET2280_BRG_CFG_U32, PCI_BASE_ADDRESS_2,
cpu_to_le32(NET2280_BASE2));
/* finally done setting up the bridge */
P54U_WRITE(NET2280_DEV_CFG_U16, 0x10000 | PCI_COMMAND,
cpu_to_le32(PCI_COMMAND_MEMORY |
PCI_COMMAND_MASTER));
P54U_WRITE(NET2280_DEV_CFG_U16, 0x10000 | 0x40 /* TRDY timeout */, 0);
P54U_WRITE(NET2280_DEV_CFG_U32, 0x10000 | PCI_BASE_ADDRESS_0,
cpu_to_le32(P54U_DEV_BASE));
P54U_WRITE(NET2280_BRG_U32, NET2280_USBIRQENB1, 0);
P54U_WRITE(NET2280_BRG_U32, NET2280_IRQSTAT1,
cpu_to_le32(NET2280_PCI_INTA_INTERRUPT));
/* do romboot */
P54U_WRITE(NET2280_DEV_U32, &devreg->int_enable, 0);
P54U_READ(NET2280_DEV_U32, &devreg->ctrl_stat);
reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RAMBOOT);
reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_CLKRUN);
P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
mdelay(20);
reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RESET);
P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
mdelay(20);
reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
mdelay(100);
P54U_READ(NET2280_DEV_U32, &devreg->int_ident);
P54U_WRITE(NET2280_DEV_U32, &devreg->int_ack, reg);
/* finally, we can upload firmware now! */
remains = priv->fw->size;
data = priv->fw->data;
offset = ISL38XX_DEV_FIRMWARE_ADDR;
while (remains) {
unsigned int block_len = min(remains, (unsigned int)512);
memcpy(buf, data, block_len);
err = p54u_bulk_msg(priv, P54U_PIPE_DATA, buf, block_len);
if (err) {
dev_err(&priv->udev->dev, "(p54usb) firmware block "
"upload failed\n");
goto fail;
}
P54U_WRITE(NET2280_DEV_U32, &devreg->direct_mem_base,
cpu_to_le32(0xc0000f00));
P54U_WRITE(NET2280_DEV_U32,
0x0020 | (unsigned long)&devreg->direct_mem_win, 0);
P54U_WRITE(NET2280_DEV_U32,
0x0020 | (unsigned long)&devreg->direct_mem_win,
cpu_to_le32(1));
P54U_WRITE(NET2280_DEV_U32,
0x0024 | (unsigned long)&devreg->direct_mem_win,
cpu_to_le32(block_len));
P54U_WRITE(NET2280_DEV_U32,
0x0028 | (unsigned long)&devreg->direct_mem_win,
cpu_to_le32(offset));
P54U_WRITE(NET2280_DEV_U32, &devreg->dma_addr,
cpu_to_le32(NET2280_EPA_FIFO_PCI_ADDR));
P54U_WRITE(NET2280_DEV_U32, &devreg->dma_len,
cpu_to_le32(block_len >> 2));
P54U_WRITE(NET2280_DEV_U32, &devreg->dma_ctrl,
cpu_to_le32(ISL38XX_DMA_MASTER_CONTROL_TRIGGER));
mdelay(10);
P54U_READ(NET2280_DEV_U32,
0x002C | (unsigned long)&devreg->direct_mem_win);
if (!(reg & cpu_to_le32(ISL38XX_DMA_STATUS_DONE)) ||
!(reg & cpu_to_le32(ISL38XX_DMA_STATUS_READY))) {
dev_err(&priv->udev->dev, "(p54usb) firmware DMA "
"transfer failed\n");
goto fail;
}
P54U_WRITE(NET2280_BRG_U32, NET2280_EPA_STAT,
cpu_to_le32(NET2280_FIFO_FLUSH));
remains -= block_len;
data += block_len;
offset += block_len;
}
/* do ramboot */
P54U_READ(NET2280_DEV_U32, &devreg->ctrl_stat);
reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_CLKRUN);
reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RAMBOOT);
P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
mdelay(20);
reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RESET);
P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
P54U_WRITE(NET2280_DEV_U32, &devreg->ctrl_stat, reg);
mdelay(100);
P54U_READ(NET2280_DEV_U32, &devreg->int_ident);
P54U_WRITE(NET2280_DEV_U32, &devreg->int_ack, reg);
/* start up the firmware */
P54U_WRITE(NET2280_DEV_U32, &devreg->int_enable,
cpu_to_le32(ISL38XX_INT_IDENT_INIT));
P54U_WRITE(NET2280_BRG_U32, NET2280_IRQSTAT1,
cpu_to_le32(NET2280_PCI_INTA_INTERRUPT));
P54U_WRITE(NET2280_BRG_U32, NET2280_USBIRQENB1,
cpu_to_le32(NET2280_PCI_INTA_INTERRUPT_ENABLE |
NET2280_USB_INTERRUPT_ENABLE));
P54U_WRITE(NET2280_DEV_U32, &devreg->dev_int,
cpu_to_le32(ISL38XX_DEV_INT_RESET));
err = usb_interrupt_msg(priv->udev,
usb_rcvbulkpipe(priv->udev, P54U_PIPE_INT),
buf, sizeof(__le32), &alen, 1000);
if (err || alen != sizeof(__le32))
goto fail;
P54U_READ(NET2280_DEV_U32, &devreg->int_ident);
P54U_WRITE(NET2280_DEV_U32, &devreg->int_ack, reg);
if (!(reg & cpu_to_le32(ISL38XX_INT_IDENT_INIT)))
err = -EINVAL;
P54U_WRITE(NET2280_BRG_U32, NET2280_USBIRQENB1, 0);
P54U_WRITE(NET2280_BRG_U32, NET2280_IRQSTAT1,
cpu_to_le32(NET2280_PCI_INTA_INTERRUPT));
#undef P54U_WRITE
#undef P54U_READ
fail:
kfree(buf);
return err;
}
static int p54_find_type(struct p54u_priv *priv)
{
int i;
for (i = 0; i < __NUM_P54U_HWTYPES; i++)
if (p54u_fwlist[i].type == priv->hw_type)
break;
if (i == __NUM_P54U_HWTYPES)
return -EOPNOTSUPP;
return i;
}
static int p54u_start_ops(struct p54u_priv *priv)
{
struct ieee80211_hw *dev = priv->common.hw;
int ret;
ret = p54_parse_firmware(dev, priv->fw);
if (ret)
goto err_out;
ret = p54_find_type(priv);
if (ret < 0)
goto err_out;
if (priv->common.fw_interface != p54u_fwlist[ret].intf) {
dev_err(&priv->udev->dev, "wrong firmware, please get "
"a firmware for \"%s\" and try again.\n",
p54u_fwlist[ret].hw);
ret = -ENODEV;
goto err_out;
}
ret = priv->upload_fw(dev);
if (ret)
goto err_out;
ret = p54u_open(dev);
if (ret)
goto err_out;
ret = p54_read_eeprom(dev);
if (ret)
goto err_stop;
p54u_stop(dev);
ret = p54_register_common(dev, &priv->udev->dev);
if (ret)
goto err_stop;
return 0;
err_stop:
p54u_stop(dev);
err_out:
/*
* p54u_disconnect will do the rest of the
* cleanup
*/
return ret;
}
static void p54u_load_firmware_cb(const struct firmware *firmware,
void *context)
{
struct p54u_priv *priv = context;
struct usb_device *udev = priv->udev;
int err;
complete(&priv->fw_wait_load);
if (firmware) {
priv->fw = firmware;
err = p54u_start_ops(priv);
} else {
err = -ENOENT;
dev_err(&udev->dev, "Firmware not found.\n");
}
if (err) {
struct device *parent = priv->udev->dev.parent;
dev_err(&udev->dev, "failed to initialize device (%d)\n", err);
if (parent)
device_lock(parent);
device_release_driver(&udev->dev);
/*
* At this point p54u_disconnect has already freed
* the "priv" context. Do not use it anymore!
*/
priv = NULL;
if (parent)
device_unlock(parent);
}
usb_put_dev(udev);
}
static int p54u_load_firmware(struct ieee80211_hw *dev,
struct usb_interface *intf)
{
struct usb_device *udev = interface_to_usbdev(intf);
struct p54u_priv *priv = dev->priv;
struct device *device = &udev->dev;
int err, i;
BUILD_BUG_ON(ARRAY_SIZE(p54u_fwlist) != __NUM_P54U_HWTYPES);
init_completion(&priv->fw_wait_load);
i = p54_find_type(priv);
if (i < 0)
return i;
dev_info(&priv->udev->dev, "Loading firmware file %s\n",
p54u_fwlist[i].fw);
usb_get_dev(udev);
err = request_firmware_nowait(THIS_MODULE, 1, p54u_fwlist[i].fw,
device, GFP_KERNEL, priv,
p54u_load_firmware_cb);
if (err) {
dev_err(&priv->udev->dev, "(p54usb) cannot load firmware %s "
"(%d)!\n", p54u_fwlist[i].fw, err);
usb_put_dev(udev);
}
return err;
}
static int p54u_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev(intf);
struct ieee80211_hw *dev;
struct p54u_priv *priv;
int err;
unsigned int i, recognized_pipes;
dev = p54_init_common(sizeof(*priv));
if (!dev) {
dev_err(&udev->dev, "(p54usb) ieee80211 alloc failed\n");
return -ENOMEM;
}
priv = dev->priv;
priv->hw_type = P54U_INVALID_HW;
SET_IEEE80211_DEV(dev, &intf->dev);
usb_set_intfdata(intf, dev);
priv->udev = udev;
priv->intf = intf;
skb_queue_head_init(&priv->rx_queue);
init_usb_anchor(&priv->submitted);
usb_get_dev(udev);
/* really lazy and simple way of figuring out if we're a 3887 */
/* TODO: should just stick the identification in the device table */
i = intf->altsetting->desc.bNumEndpoints;
recognized_pipes = 0;
while (i--) {
switch (intf->altsetting->endpoint[i].desc.bEndpointAddress) {
case P54U_PIPE_DATA:
case P54U_PIPE_MGMT:
case P54U_PIPE_BRG:
case P54U_PIPE_DEV:
case P54U_PIPE_DATA | USB_DIR_IN:
case P54U_PIPE_MGMT | USB_DIR_IN:
case P54U_PIPE_BRG | USB_DIR_IN:
case P54U_PIPE_DEV | USB_DIR_IN:
case P54U_PIPE_INT | USB_DIR_IN:
recognized_pipes++;
}
}
priv->common.open = p54u_open;
priv->common.stop = p54u_stop;
if (recognized_pipes < P54U_PIPE_NUMBER) {
#ifdef CONFIG_PM
/* ISL3887 needs a full reset on resume */
udev->reset_resume = 1;
#endif /* CONFIG_PM */
err = p54u_device_reset(dev);
priv->hw_type = P54U_3887;
dev->extra_tx_headroom += sizeof(struct lm87_tx_hdr);
priv->common.tx_hdr_len = sizeof(struct lm87_tx_hdr);
priv->common.tx = p54u_tx_lm87;
priv->upload_fw = p54u_upload_firmware_3887;
} else {
priv->hw_type = P54U_NET2280;
dev->extra_tx_headroom += sizeof(struct net2280_tx_hdr);
priv->common.tx_hdr_len = sizeof(struct net2280_tx_hdr);
priv->common.tx = p54u_tx_net2280;
priv->upload_fw = p54u_upload_firmware_net2280;
}
err = p54u_load_firmware(dev, intf);
return err;
}
static void p54u_disconnect(struct usb_interface *intf)
{
struct ieee80211_hw *dev = usb_get_intfdata(intf);
struct p54u_priv *priv;
if (!dev)
return;
priv = dev->priv;
wait_for_completion(&priv->fw_wait_load);
p54_unregister_common(dev);
usb_put_dev(interface_to_usbdev(intf));
release_firmware(priv->fw);
p54_free_common(dev);
}
static int p54u_pre_reset(struct usb_interface *intf)
{
struct ieee80211_hw *dev = usb_get_intfdata(intf);
if (!dev)
return -ENODEV;
p54u_stop(dev);
return 0;
}
static int p54u_resume(struct usb_interface *intf)
{
struct ieee80211_hw *dev = usb_get_intfdata(intf);
struct p54u_priv *priv;
if (!dev)
return -ENODEV;
priv = dev->priv;
if (unlikely(!(priv->upload_fw && priv->fw)))
return 0;
return priv->upload_fw(dev);
}
static int p54u_post_reset(struct usb_interface *intf)
{
struct ieee80211_hw *dev = usb_get_intfdata(intf);
struct p54u_priv *priv;
int err;
err = p54u_resume(intf);
if (err)
return err;
/* reinitialize old device state */
priv = dev->priv;
if (priv->common.mode != NL80211_IFTYPE_UNSPECIFIED)
ieee80211_restart_hw(dev);
return 0;
}
#ifdef CONFIG_PM
static int p54u_suspend(struct usb_interface *intf, pm_message_t message)
{
return p54u_pre_reset(intf);
}
#endif /* CONFIG_PM */
static struct usb_driver p54u_driver = {
.name = "p54usb",
.id_table = p54u_table,
.probe = p54u_probe,
.disconnect = p54u_disconnect,
.pre_reset = p54u_pre_reset,
.post_reset = p54u_post_reset,
#ifdef CONFIG_PM
.suspend = p54u_suspend,
.resume = p54u_resume,
.reset_resume = p54u_resume,
#endif /* CONFIG_PM */
.soft_unbind = 1,
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>
2012-04-23 17:08:51 +00:00
.disable_hub_initiated_lpm = 1,
};
module_usb_driver(p54u_driver);