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linux/drivers/net/wireless/orinoco/orinoco_usb.c
David Kilroy bac6fafd4d orinoco: refactor xmit path 
... so orinoco_usb can share some common functionality.

Handle 802.2 encapsulation and MIC calculation in that function.
The 802.3 header is prepended to the SKB. The calculated MIC is written
to a specified buffer. Also modify the transmit control word that will
be passed onto the hardware to specify whether the MIC is present, and
the key used.

Signed-off-by: David Kilroy <kilroyd@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-05-07 14:55:49 -04:00

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/*
* USB Orinoco driver
*
* Copyright (c) 2003 Manuel Estrada Sainz
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License
* at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and
* limitations under the License.
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU General Public License version 2 (the "GPL"), in
* which case the provisions of the GPL are applicable instead of the
* above. If you wish to allow the use of your version of this file
* only under the terms of the GPL and not to allow others to use your
* version of this file under the MPL, indicate your decision by
* deleting the provisions above and replace them with the notice and
* other provisions required by the GPL. If you do not delete the
* provisions above, a recipient may use your version of this file
* under either the MPL or the GPL.
*
* Queueing code based on linux-wlan-ng 0.2.1-pre5
*
* Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
*
* The license is the same as above.
*
* Initialy based on USB Skeleton driver - 0.7
*
* Copyright (c) 2001 Greg Kroah-Hartman (greg@kroah.com)
*
* 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.
*
* NOTE: The original USB Skeleton driver is GPL, but all that code is
* gone so MPL/GPL applies.
*/
#define DRIVER_NAME "orinoco_usb"
#define PFX DRIVER_NAME ": "
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/signal.h>
#include <linux/errno.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/fcntl.h>
#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/smp_lock.h>
#include <linux/usb.h>
#include <linux/timer.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
#include <linux/wireless.h>
#include <linux/firmware.h>
#include "mic.h"
#include "orinoco.h"
#ifndef URB_ASYNC_UNLINK
#define URB_ASYNC_UNLINK 0
#endif
/* 802.2 LLC/SNAP header used for Ethernet encapsulation over 802.11 */
static const u8 encaps_hdr[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
#define ENCAPS_OVERHEAD (sizeof(encaps_hdr) + 2)
struct header_struct {
/* 802.3 */
u8 dest[ETH_ALEN];
u8 src[ETH_ALEN];
__be16 len;
/* 802.2 */
u8 dsap;
u8 ssap;
u8 ctrl;
/* SNAP */
u8 oui[3];
__be16 ethertype;
} __attribute__ ((packed));
struct ez_usb_fw {
u16 size;
const u8 *code;
};
static struct ez_usb_fw firmware = {
.size = 0,
.code = NULL,
};
#ifdef CONFIG_USB_DEBUG
static int debug = 1;
#else
static int debug;
#endif
/* Debugging macros */
#undef dbg
#define dbg(format, arg...) \
do { if (debug) printk(KERN_DEBUG PFX "%s: " format "\n", \
__func__ , ## arg); } while (0)
#undef err
#define err(format, arg...) \
do { printk(KERN_ERR PFX format "\n", ## arg); } while (0)
/* Module paramaters */
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Debug enabled or not");
MODULE_FIRMWARE("orinoco_ezusb_fw");
/*
* Under some conditions, the card gets stuck and stops paying attention
* to the world (i.e. data communication stalls) until we do something to
* it. Sending an INQ_TALLIES command seems to be enough and should be
* harmless otherwise. This behaviour has been observed when using the
* driver on a systemimager client during installation. In the past a
* timer was used to send INQ_TALLIES commands when there was no other
* activity, but it was troublesome and was removed.
*/
#define USB_COMPAQ_VENDOR_ID 0x049f /* Compaq Computer Corp. */
#define USB_COMPAQ_WL215_ID 0x001f /* Compaq WL215 USB Adapter */
#define USB_COMPAQ_W200_ID 0x0076 /* Compaq W200 USB Adapter */
#define USB_HP_WL215_ID 0x0082 /* Compaq WL215 USB Adapter */
#define USB_MELCO_VENDOR_ID 0x0411
#define USB_BUFFALO_L11_ID 0x0006 /* BUFFALO WLI-USB-L11 */
#define USB_BUFFALO_L11G_WR_ID 0x000B /* BUFFALO WLI-USB-L11G-WR */
#define USB_BUFFALO_L11G_ID 0x000D /* BUFFALO WLI-USB-L11G */
#define USB_LUCENT_VENDOR_ID 0x047E /* Lucent Technologies */
#define USB_LUCENT_ORINOCO_ID 0x0300 /* Lucent/Agere Orinoco USB Client */
#define USB_AVAYA8_VENDOR_ID 0x0D98
#define USB_AVAYAE_VENDOR_ID 0x0D9E
#define USB_AVAYA_WIRELESS_ID 0x0300 /* Avaya Wireless USB Card */
#define USB_AGERE_VENDOR_ID 0x0D4E /* Agere Systems */
#define USB_AGERE_MODEL0801_ID 0x1000 /* Wireless USB Card Model 0801 */
#define USB_AGERE_MODEL0802_ID 0x1001 /* Wireless USB Card Model 0802 */
#define USB_AGERE_REBRANDED_ID 0x047A /* WLAN USB Card */
#define USB_ELSA_VENDOR_ID 0x05CC
#define USB_ELSA_AIRLANCER_ID 0x3100 /* ELSA AirLancer USB-11 */
#define USB_LEGEND_VENDOR_ID 0x0E7C
#define USB_LEGEND_JOYNET_ID 0x0300 /* Joynet WLAN USB Card */
#define USB_SAMSUNG_VENDOR_ID 0x04E8
#define USB_SAMSUNG_SEW2001U1_ID 0x5002 /* Samsung SEW-2001u Card */
#define USB_SAMSUNG_SEW2001U2_ID 0x5B11 /* Samsung SEW-2001u Card */
#define USB_SAMSUNG_SEW2003U_ID 0x7011 /* Samsung SEW-2003U Card */
#define USB_IGATE_VENDOR_ID 0x0681
#define USB_IGATE_IGATE_11M_ID 0x0012 /* I-GATE 11M USB Card */
#define USB_FUJITSU_VENDOR_ID 0x0BF8
#define USB_FUJITSU_E1100_ID 0x1002 /* connect2AIR WLAN E-1100 USB */
#define USB_2WIRE_VENDOR_ID 0x1630
#define USB_2WIRE_WIRELESS_ID 0xff81 /* 2Wire Wireless USB adapter */
#define EZUSB_REQUEST_FW_TRANS 0xA0
#define EZUSB_REQUEST_TRIGER 0xAA
#define EZUSB_REQUEST_TRIG_AC 0xAC
#define EZUSB_CPUCS_REG 0x7F92
#define EZUSB_RID_TX 0x0700
#define EZUSB_RID_RX 0x0701
#define EZUSB_RID_INIT1 0x0702
#define EZUSB_RID_ACK 0x0710
#define EZUSB_RID_READ_PDA 0x0800
#define EZUSB_RID_PROG_INIT 0x0852
#define EZUSB_RID_PROG_SET_ADDR 0x0853
#define EZUSB_RID_PROG_BYTES 0x0854
#define EZUSB_RID_PROG_END 0x0855
#define EZUSB_RID_DOCMD 0x0860
/* Recognize info frames */
#define EZUSB_IS_INFO(id) ((id >= 0xF000) && (id <= 0xF2FF))
#define EZUSB_MAGIC 0x0210
#define EZUSB_FRAME_DATA 1
#define EZUSB_FRAME_CONTROL 2
#define DEF_TIMEOUT (3*HZ)
#define BULK_BUF_SIZE 2048
#define MAX_DL_SIZE (BULK_BUF_SIZE - sizeof(struct ezusb_packet))
#define FW_BUF_SIZE 64
#define FW_VAR_OFFSET_PTR 0x359
#define FW_VAR_VALUE 0
#define FW_HOLE_START 0x100
#define FW_HOLE_END 0x300
struct ezusb_packet {
__le16 magic; /* 0x0210 */
u8 req_reply_count;
u8 ans_reply_count;
__le16 frame_type; /* 0x01 for data frames, 0x02 otherwise */
__le16 size; /* transport size */
__le16 crc; /* CRC up to here */
__le16 hermes_len;
__le16 hermes_rid;
u8 data[0];
} __attribute__ ((packed));
/* Table of devices that work or may work with this driver */
static struct usb_device_id ezusb_table[] = {
{USB_DEVICE(USB_COMPAQ_VENDOR_ID, USB_COMPAQ_WL215_ID)},
{USB_DEVICE(USB_COMPAQ_VENDOR_ID, USB_HP_WL215_ID)},
{USB_DEVICE(USB_COMPAQ_VENDOR_ID, USB_COMPAQ_W200_ID)},
{USB_DEVICE(USB_MELCO_VENDOR_ID, USB_BUFFALO_L11_ID)},
{USB_DEVICE(USB_MELCO_VENDOR_ID, USB_BUFFALO_L11G_WR_ID)},
{USB_DEVICE(USB_MELCO_VENDOR_ID, USB_BUFFALO_L11G_ID)},
{USB_DEVICE(USB_LUCENT_VENDOR_ID, USB_LUCENT_ORINOCO_ID)},
{USB_DEVICE(USB_AVAYA8_VENDOR_ID, USB_AVAYA_WIRELESS_ID)},
{USB_DEVICE(USB_AVAYAE_VENDOR_ID, USB_AVAYA_WIRELESS_ID)},
{USB_DEVICE(USB_AGERE_VENDOR_ID, USB_AGERE_MODEL0801_ID)},
{USB_DEVICE(USB_AGERE_VENDOR_ID, USB_AGERE_MODEL0802_ID)},
{USB_DEVICE(USB_ELSA_VENDOR_ID, USB_ELSA_AIRLANCER_ID)},
{USB_DEVICE(USB_LEGEND_VENDOR_ID, USB_LEGEND_JOYNET_ID)},
{USB_DEVICE_VER(USB_SAMSUNG_VENDOR_ID, USB_SAMSUNG_SEW2001U1_ID,
0, 0)},
{USB_DEVICE(USB_SAMSUNG_VENDOR_ID, USB_SAMSUNG_SEW2001U2_ID)},
{USB_DEVICE(USB_SAMSUNG_VENDOR_ID, USB_SAMSUNG_SEW2003U_ID)},
{USB_DEVICE(USB_IGATE_VENDOR_ID, USB_IGATE_IGATE_11M_ID)},
{USB_DEVICE(USB_FUJITSU_VENDOR_ID, USB_FUJITSU_E1100_ID)},
{USB_DEVICE(USB_2WIRE_VENDOR_ID, USB_2WIRE_WIRELESS_ID)},
{USB_DEVICE(USB_AGERE_VENDOR_ID, USB_AGERE_REBRANDED_ID)},
{} /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, ezusb_table);
/* Structure to hold all of our device specific stuff */
struct ezusb_priv {
struct usb_device *udev;
struct net_device *dev;
struct mutex mtx;
spinlock_t req_lock;
struct list_head req_pending;
struct list_head req_active;
spinlock_t reply_count_lock;
u16 hermes_reg_fake[0x40];
u8 *bap_buf;
struct urb *read_urb;
int read_pipe;
int write_pipe;
u8 reply_count;
};
enum ezusb_state {
EZUSB_CTX_START,
EZUSB_CTX_QUEUED,
EZUSB_CTX_REQ_SUBMITTED,
EZUSB_CTX_REQ_COMPLETE,
EZUSB_CTX_RESP_RECEIVED,
EZUSB_CTX_REQ_TIMEOUT,
EZUSB_CTX_REQ_FAILED,
EZUSB_CTX_RESP_TIMEOUT,
EZUSB_CTX_REQSUBMIT_FAIL,
EZUSB_CTX_COMPLETE,
};
struct request_context {
struct list_head list;
atomic_t refcount;
struct completion done; /* Signals that CTX is dead */
int killed;
struct urb *outurb; /* OUT for req pkt */
struct ezusb_priv *upriv;
struct ezusb_packet *buf;
int buf_length;
struct timer_list timer; /* Timeout handling */
enum ezusb_state state; /* Current state */
/* the RID that we will wait for */
u16 out_rid;
u16 in_rid;
};
/* Forward declarations */
static void ezusb_ctx_complete(struct request_context *ctx);
static void ezusb_req_queue_run(struct ezusb_priv *upriv);
static void ezusb_bulk_in_callback(struct urb *urb);
static inline u8 ezusb_reply_inc(u8 count)
{
if (count < 0x7F)
return count + 1;
else
return 1;
}
static void ezusb_request_context_put(struct request_context *ctx)
{
if (!atomic_dec_and_test(&ctx->refcount))
return;
WARN_ON(!ctx->done.done);
BUG_ON(ctx->outurb->status == -EINPROGRESS);
BUG_ON(timer_pending(&ctx->timer));
usb_free_urb(ctx->outurb);
kfree(ctx->buf);
kfree(ctx);
}
static inline void ezusb_mod_timer(struct ezusb_priv *upriv,
struct timer_list *timer,
unsigned long expire)
{
if (!upriv->udev)
return;
mod_timer(timer, expire);
}
static void ezusb_request_timerfn(u_long _ctx)
{
struct request_context *ctx = (void *) _ctx;
ctx->outurb->transfer_flags |= URB_ASYNC_UNLINK;
if (usb_unlink_urb(ctx->outurb) == -EINPROGRESS) {
ctx->state = EZUSB_CTX_REQ_TIMEOUT;
} else {
ctx->state = EZUSB_CTX_RESP_TIMEOUT;
dbg("couldn't unlink");
atomic_inc(&ctx->refcount);
ctx->killed = 1;
ezusb_ctx_complete(ctx);
ezusb_request_context_put(ctx);
}
};
static struct request_context *ezusb_alloc_ctx(struct ezusb_priv *upriv,
u16 out_rid, u16 in_rid)
{
struct request_context *ctx;
ctx = kmalloc(sizeof(*ctx), GFP_ATOMIC);
if (!ctx)
return NULL;
memset(ctx, 0, sizeof(*ctx));
ctx->buf = kmalloc(BULK_BUF_SIZE, GFP_ATOMIC);
if (!ctx->buf) {
kfree(ctx);
return NULL;
}
ctx->outurb = usb_alloc_urb(0, GFP_ATOMIC);
if (!ctx->outurb) {
kfree(ctx->buf);
kfree(ctx);
return NULL;
}
ctx->upriv = upriv;
ctx->state = EZUSB_CTX_START;
ctx->out_rid = out_rid;
ctx->in_rid = in_rid;
atomic_set(&ctx->refcount, 1);
init_completion(&ctx->done);
init_timer(&ctx->timer);
ctx->timer.function = ezusb_request_timerfn;
ctx->timer.data = (u_long) ctx;
return ctx;
}
/* Hopefully the real complete_all will soon be exported, in the mean
* while this should work. */
static inline void ezusb_complete_all(struct completion *comp)
{
complete(comp);
complete(comp);
complete(comp);
complete(comp);
}
static void ezusb_ctx_complete(struct request_context *ctx)
{
struct ezusb_priv *upriv = ctx->upriv;
unsigned long flags;
spin_lock_irqsave(&upriv->req_lock, flags);
list_del_init(&ctx->list);
if (upriv->udev) {
spin_unlock_irqrestore(&upriv->req_lock, flags);
ezusb_req_queue_run(upriv);
spin_lock_irqsave(&upriv->req_lock, flags);
}
switch (ctx->state) {
case EZUSB_CTX_COMPLETE:
case EZUSB_CTX_REQSUBMIT_FAIL:
case EZUSB_CTX_REQ_FAILED:
case EZUSB_CTX_REQ_TIMEOUT:
case EZUSB_CTX_RESP_TIMEOUT:
spin_unlock_irqrestore(&upriv->req_lock, flags);
if ((ctx->out_rid == EZUSB_RID_TX) && upriv->dev) {
struct net_device *dev = upriv->dev;
struct orinoco_private *priv = ndev_priv(dev);
struct net_device_stats *stats = &priv->stats;
if (ctx->state != EZUSB_CTX_COMPLETE)
stats->tx_errors++;
else
stats->tx_packets++;
netif_wake_queue(dev);
}
ezusb_complete_all(&ctx->done);
ezusb_request_context_put(ctx);
break;
default:
spin_unlock_irqrestore(&upriv->req_lock, flags);
if (!upriv->udev) {
/* This is normal, as all request contexts get flushed
* when the device is disconnected */
err("Called, CTX not terminating, but device gone");
ezusb_complete_all(&ctx->done);
ezusb_request_context_put(ctx);
break;
}
err("Called, CTX not in terminating state.");
/* Things are really bad if this happens. Just leak
* the CTX because it may still be linked to the
* queue or the OUT urb may still be active.
* Just leaking at least prevents an Oops or Panic.
*/
break;
}
}
/**
* ezusb_req_queue_run:
* Description:
* Note: Only one active CTX at any one time, because there's no
* other (reliable) way to match the response URB to the correct
* CTX.
**/
static void ezusb_req_queue_run(struct ezusb_priv *upriv)
{
unsigned long flags;
struct request_context *ctx;
int result;
spin_lock_irqsave(&upriv->req_lock, flags);
if (!list_empty(&upriv->req_active))
goto unlock;
if (list_empty(&upriv->req_pending))
goto unlock;
ctx =
list_entry(upriv->req_pending.next, struct request_context,
list);
if (!ctx->upriv->udev)
goto unlock;
/* We need to split this off to avoid a race condition */
list_move_tail(&ctx->list, &upriv->req_active);
if (ctx->state == EZUSB_CTX_QUEUED) {
atomic_inc(&ctx->refcount);
result = usb_submit_urb(ctx->outurb, GFP_ATOMIC);
if (result) {
ctx->state = EZUSB_CTX_REQSUBMIT_FAIL;
spin_unlock_irqrestore(&upriv->req_lock, flags);
err("Fatal, failed to submit command urb."
" error=%d\n", result);
ezusb_ctx_complete(ctx);
ezusb_request_context_put(ctx);
goto done;
}
ctx->state = EZUSB_CTX_REQ_SUBMITTED;
ezusb_mod_timer(ctx->upriv, &ctx->timer,
jiffies + DEF_TIMEOUT);
}
unlock:
spin_unlock_irqrestore(&upriv->req_lock, flags);
done:
return;
}
static void ezusb_req_enqueue_run(struct ezusb_priv *upriv,
struct request_context *ctx)
{
unsigned long flags;
spin_lock_irqsave(&upriv->req_lock, flags);
if (!ctx->upriv->udev) {
spin_unlock_irqrestore(&upriv->req_lock, flags);
goto done;
}
atomic_inc(&ctx->refcount);
list_add_tail(&ctx->list, &upriv->req_pending);
spin_unlock_irqrestore(&upriv->req_lock, flags);
ctx->state = EZUSB_CTX_QUEUED;
ezusb_req_queue_run(upriv);
done:
return;
}
static void ezusb_request_out_callback(struct urb *urb)
{
unsigned long flags;
enum ezusb_state state;
struct request_context *ctx = urb->context;
struct ezusb_priv *upriv = ctx->upriv;
spin_lock_irqsave(&upriv->req_lock, flags);
del_timer(&ctx->timer);
if (ctx->killed) {
spin_unlock_irqrestore(&upriv->req_lock, flags);
pr_warning("interrupt called with dead ctx");
goto out;
}
state = ctx->state;
if (urb->status == 0) {
switch (state) {
case EZUSB_CTX_REQ_SUBMITTED:
if (ctx->in_rid) {
ctx->state = EZUSB_CTX_REQ_COMPLETE;
/* reply URB still pending */
ezusb_mod_timer(upriv, &ctx->timer,
jiffies + DEF_TIMEOUT);
spin_unlock_irqrestore(&upriv->req_lock,
flags);
break;
}
/* fall through */
case EZUSB_CTX_RESP_RECEIVED:
/* IN already received before this OUT-ACK */
ctx->state = EZUSB_CTX_COMPLETE;
spin_unlock_irqrestore(&upriv->req_lock, flags);
ezusb_ctx_complete(ctx);
break;
default:
spin_unlock_irqrestore(&upriv->req_lock, flags);
err("Unexpected state(0x%x, %d) in OUT URB",
state, urb->status);
break;
}
} else {
/* If someone cancels the OUT URB then its status
* should be either -ECONNRESET or -ENOENT.
*/
switch (state) {
case EZUSB_CTX_REQ_SUBMITTED:
case EZUSB_CTX_RESP_RECEIVED:
ctx->state = EZUSB_CTX_REQ_FAILED;
/* fall through */
case EZUSB_CTX_REQ_FAILED:
case EZUSB_CTX_REQ_TIMEOUT:
spin_unlock_irqrestore(&upriv->req_lock, flags);
ezusb_ctx_complete(ctx);
break;
default:
spin_unlock_irqrestore(&upriv->req_lock, flags);
err("Unexpected state(0x%x, %d) in OUT URB",
state, urb->status);
break;
}
}
out:
ezusb_request_context_put(ctx);
}
static void ezusb_request_in_callback(struct ezusb_priv *upriv,
struct urb *urb)
{
struct ezusb_packet *ans = urb->transfer_buffer;
struct request_context *ctx = NULL;
enum ezusb_state state;
unsigned long flags;
/* Find the CTX on the active queue that requested this URB */
spin_lock_irqsave(&upriv->req_lock, flags);
if (upriv->udev) {
struct list_head *item;
list_for_each(item, &upriv->req_active) {
struct request_context *c;
int reply_count;
c = list_entry(item, struct request_context, list);
reply_count =
ezusb_reply_inc(c->buf->req_reply_count);
if ((ans->ans_reply_count == reply_count)
&& (le16_to_cpu(ans->hermes_rid) == c->in_rid)) {
ctx = c;
break;
}
dbg("Skipped (0x%x/0x%x) (%d/%d)",
le16_to_cpu(ans->hermes_rid),
c->in_rid, ans->ans_reply_count, reply_count);
}
}
if (ctx == NULL) {
spin_unlock_irqrestore(&upriv->req_lock, flags);
err("%s: got unexpected RID: 0x%04X", __func__,
le16_to_cpu(ans->hermes_rid));
ezusb_req_queue_run(upriv);
return;
}
/* The data we want is in the in buffer, exchange */
urb->transfer_buffer = ctx->buf;
ctx->buf = (void *) ans;
ctx->buf_length = urb->actual_length;
state = ctx->state;
switch (state) {
case EZUSB_CTX_REQ_SUBMITTED:
/* We have received our response URB before
* our request has been acknowledged. Do NOT
* destroy our CTX yet, because our OUT URB
* is still alive ...
*/
ctx->state = EZUSB_CTX_RESP_RECEIVED;
spin_unlock_irqrestore(&upriv->req_lock, flags);
/* Let the machine continue running. */
break;
case EZUSB_CTX_REQ_COMPLETE:
/* This is the usual path: our request
* has already been acknowledged, and
* we have now received the reply.
*/
ctx->state = EZUSB_CTX_COMPLETE;
/* Stop the intimer */
del_timer(&ctx->timer);
spin_unlock_irqrestore(&upriv->req_lock, flags);
/* Call the completion handler */
ezusb_ctx_complete(ctx);
break;
default:
spin_unlock_irqrestore(&upriv->req_lock, flags);
pr_warning("Matched IN URB, unexpected context state(0x%x)",
state);
/* Throw this CTX away and try submitting another */
del_timer(&ctx->timer);
ctx->outurb->transfer_flags |= URB_ASYNC_UNLINK;
usb_unlink_urb(ctx->outurb);
ezusb_req_queue_run(upriv);
break;
} /* switch */
}
static void ezusb_req_ctx_wait(struct ezusb_priv *upriv,
struct request_context *ctx)
{
switch (ctx->state) {
case EZUSB_CTX_QUEUED:
case EZUSB_CTX_REQ_SUBMITTED:
case EZUSB_CTX_REQ_COMPLETE:
case EZUSB_CTX_RESP_RECEIVED:
if (in_softirq()) {
/* If we get called from a timer, timeout timers don't
* get the chance to run themselves. So we make sure
* that we don't sleep for ever */
int msecs = DEF_TIMEOUT * (1000 / HZ);
while (!ctx->done.done && msecs--)
udelay(1000);
} else {
wait_event_interruptible(ctx->done.wait,
ctx->done.done);
}
break;
default:
/* Done or failed - nothing to wait for */
break;
}
}
static inline u16 build_crc(struct ezusb_packet *data)
{
u16 crc = 0;
u8 *bytes = (u8 *)data;
int i;
for (i = 0; i < 8; i++)
crc = (crc << 1) + bytes[i];
return crc;
}
/**
* ezusb_fill_req:
*
* if data == NULL and length > 0 the data is assumed to be already in
* the target buffer and only the header is filled.
*
*/
static int ezusb_fill_req(struct ezusb_packet *req, u16 length, u16 rid,
const void *data, u16 frame_type, u8 reply_count)
{
int total_size = sizeof(*req) + length;
BUG_ON(total_size > BULK_BUF_SIZE);
req->magic = cpu_to_le16(EZUSB_MAGIC);
req->req_reply_count = reply_count;
req->ans_reply_count = 0;
req->frame_type = cpu_to_le16(frame_type);
req->size = cpu_to_le16(length + 4);
req->crc = cpu_to_le16(build_crc(req));
req->hermes_len = cpu_to_le16(HERMES_BYTES_TO_RECLEN(length));
req->hermes_rid = cpu_to_le16(rid);
if (data)
memcpy(req->data, data, length);
return total_size;
}
static int ezusb_submit_in_urb(struct ezusb_priv *upriv)
{
int retval = 0;
void *cur_buf = upriv->read_urb->transfer_buffer;
if (upriv->read_urb->status == -EINPROGRESS) {
dbg("urb busy, not resubmiting");
retval = -EBUSY;
goto exit;
}
usb_fill_bulk_urb(upriv->read_urb, upriv->udev, upriv->read_pipe,
cur_buf, BULK_BUF_SIZE,
ezusb_bulk_in_callback, upriv);
upriv->read_urb->transfer_flags = 0;
retval = usb_submit_urb(upriv->read_urb, GFP_ATOMIC);
if (retval)
err("%s submit failed %d", __func__, retval);
exit:
return retval;
}
static inline int ezusb_8051_cpucs(struct ezusb_priv *upriv, int reset)
{
u8 res_val = reset; /* avoid argument promotion */
if (!upriv->udev) {
err("%s: !upriv->udev", __func__);
return -EFAULT;
}
return usb_control_msg(upriv->udev,
usb_sndctrlpipe(upriv->udev, 0),
EZUSB_REQUEST_FW_TRANS,
USB_TYPE_VENDOR | USB_RECIP_DEVICE |
USB_DIR_OUT, EZUSB_CPUCS_REG, 0, &res_val,
sizeof(res_val), DEF_TIMEOUT);
}
static int ezusb_firmware_download(struct ezusb_priv *upriv,
struct ez_usb_fw *fw)
{
u8 fw_buffer[FW_BUF_SIZE];
int retval, addr;
int variant_offset;
/*
* This byte is 1 and should be replaced with 0. The offset is
* 0x10AD in version 0.0.6. The byte in question should follow
* the end of the code pointed to by the jump in the beginning
* of the firmware. Also, it is read by code located at 0x358.
*/
variant_offset = be16_to_cpup((__be16 *) &fw->code[FW_VAR_OFFSET_PTR]);
if (variant_offset >= fw->size) {
printk(KERN_ERR PFX "Invalid firmware variant offset: "
"0x%04x\n", variant_offset);
retval = -EINVAL;
goto fail;
}
retval = ezusb_8051_cpucs(upriv, 1);
if (retval < 0)
goto fail;
for (addr = 0; addr < fw->size; addr += FW_BUF_SIZE) {
/* 0x100-0x300 should be left alone, it contains card
* specific data, like USB enumeration information */
if ((addr >= FW_HOLE_START) && (addr < FW_HOLE_END))
continue;
memcpy(fw_buffer, &fw->code[addr], FW_BUF_SIZE);
if (variant_offset >= addr &&
variant_offset < addr + FW_BUF_SIZE) {
dbg("Patching card_variant byte at 0x%04X",
variant_offset);
fw_buffer[variant_offset - addr] = FW_VAR_VALUE;
}
retval = usb_control_msg(upriv->udev,
usb_sndctrlpipe(upriv->udev, 0),
EZUSB_REQUEST_FW_TRANS,
USB_TYPE_VENDOR | USB_RECIP_DEVICE
| USB_DIR_OUT,
addr, 0x0,
fw_buffer, FW_BUF_SIZE,
DEF_TIMEOUT);
if (retval < 0)
goto fail;
}
retval = ezusb_8051_cpucs(upriv, 0);
if (retval < 0)
goto fail;
goto exit;
fail:
printk(KERN_ERR PFX "Firmware download failed, error %d\n",
retval);
exit:
return retval;
}
static int ezusb_access_ltv(struct ezusb_priv *upriv,
struct request_context *ctx,
u16 length, const void *data, u16 frame_type,
void *ans_buff, int ans_size, u16 *ans_length)
{
int req_size;
int retval = 0;
enum ezusb_state state;
BUG_ON(in_irq());
if (!upriv->udev) {
dbg("Device disconnected");
return -ENODEV;
}
if (upriv->read_urb->status != -EINPROGRESS)
err("%s: in urb not pending", __func__);
/* protect upriv->reply_count, guarantee sequential numbers */
spin_lock_bh(&upriv->reply_count_lock);
req_size = ezusb_fill_req(ctx->buf, length, ctx->out_rid, data,
frame_type, upriv->reply_count);
usb_fill_bulk_urb(ctx->outurb, upriv->udev, upriv->write_pipe,
ctx->buf, req_size,
ezusb_request_out_callback, ctx);
if (ctx->in_rid)
upriv->reply_count = ezusb_reply_inc(upriv->reply_count);
ezusb_req_enqueue_run(upriv, ctx);
spin_unlock_bh(&upriv->reply_count_lock);
if (ctx->in_rid)
ezusb_req_ctx_wait(upriv, ctx);
state = ctx->state;
switch (state) {
case EZUSB_CTX_COMPLETE:
retval = ctx->outurb->status;
break;
case EZUSB_CTX_QUEUED:
case EZUSB_CTX_REQ_SUBMITTED:
if (!ctx->in_rid)
break;
default:
err("%s: Unexpected context state %d", __func__,
state);
/* fall though */
case EZUSB_CTX_REQ_TIMEOUT:
case EZUSB_CTX_REQ_FAILED:
case EZUSB_CTX_RESP_TIMEOUT:
case EZUSB_CTX_REQSUBMIT_FAIL:
printk(KERN_ERR PFX "Access failed, resetting (state %d,"
" reply_count %d)\n", state, upriv->reply_count);
upriv->reply_count = 0;
if (state == EZUSB_CTX_REQ_TIMEOUT
|| state == EZUSB_CTX_RESP_TIMEOUT) {
printk(KERN_ERR PFX "ctx timed out\n");
retval = -ETIMEDOUT;
} else {
printk(KERN_ERR PFX "ctx failed\n");
retval = -EFAULT;
}
goto exit;
break;
}
if (ctx->in_rid) {
struct ezusb_packet *ans = ctx->buf;
int exp_len;
if (ans->hermes_len != 0)
exp_len = le16_to_cpu(ans->hermes_len) * 2 + 12;
else
exp_len = 14;
if (exp_len != ctx->buf_length) {
err("%s: length mismatch for RID 0x%04x: "
"expected %d, got %d", __func__,
ctx->in_rid, exp_len, ctx->buf_length);
retval = -EIO;
goto exit;
}
if (ans_buff)
memcpy(ans_buff, ans->data,
min_t(int, exp_len, ans_size));
if (ans_length)
*ans_length = le16_to_cpu(ans->hermes_len);
}
exit:
ezusb_request_context_put(ctx);
return retval;
}
static int ezusb_write_ltv(hermes_t *hw, int bap, u16 rid,
u16 length, const void *data)
{
struct ezusb_priv *upriv = hw->priv;
u16 frame_type;
struct request_context *ctx;
if (length == 0)
return -EINVAL;
length = HERMES_RECLEN_TO_BYTES(length);
/* On memory mapped devices HERMES_RID_CNFGROUPADDRESSES can be
* set to be empty, but the USB bridge doesn't like it */
if (length == 0)
return 0;
ctx = ezusb_alloc_ctx(upriv, rid, EZUSB_RID_ACK);
if (!ctx)
return -ENOMEM;
if (rid == EZUSB_RID_TX)
frame_type = EZUSB_FRAME_DATA;
else
frame_type = EZUSB_FRAME_CONTROL;
return ezusb_access_ltv(upriv, ctx, length, data, frame_type,
NULL, 0, NULL);
}
static int ezusb_read_ltv(hermes_t *hw, int bap, u16 rid,
unsigned bufsize, u16 *length, void *buf)
{
struct ezusb_priv *upriv = hw->priv;
struct request_context *ctx;
if ((bufsize < 0) || (bufsize % 2))
return -EINVAL;
ctx = ezusb_alloc_ctx(upriv, rid, rid);
if (!ctx)
return -ENOMEM;
return ezusb_access_ltv(upriv, ctx, 0, NULL, EZUSB_FRAME_CONTROL,
buf, bufsize, length);
}
static int ezusb_doicmd_wait(hermes_t *hw, u16 cmd, u16 parm0, u16 parm1,
u16 parm2, struct hermes_response *resp)
{
struct ezusb_priv *upriv = hw->priv;
struct request_context *ctx;
__le16 data[4] = {
cpu_to_le16(cmd),
cpu_to_le16(parm0),
cpu_to_le16(parm1),
cpu_to_le16(parm2),
};
dbg("0x%04X, parm0 0x%04X, parm1 0x%04X, parm2 0x%04X",
cmd, parm0, parm1, parm2);
ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_DOCMD, EZUSB_RID_ACK);
if (!ctx)
return -ENOMEM;
return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
EZUSB_FRAME_CONTROL, NULL, 0, NULL);
}
static int ezusb_docmd_wait(hermes_t *hw, u16 cmd, u16 parm0,
struct hermes_response *resp)
{
struct ezusb_priv *upriv = hw->priv;
struct request_context *ctx;
__le16 data[4] = {
cpu_to_le16(cmd),
cpu_to_le16(parm0),
0,
0,
};
dbg("0x%04X, parm0 0x%04X", cmd, parm0);
ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_DOCMD, EZUSB_RID_ACK);
if (!ctx)
return -ENOMEM;
return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
EZUSB_FRAME_CONTROL, NULL, 0, NULL);
}
static int ezusb_bap_pread(struct hermes *hw, int bap,
void *buf, int len, u16 id, u16 offset)
{
struct ezusb_priv *upriv = hw->priv;
struct ezusb_packet *ans = (void *) upriv->read_urb->transfer_buffer;
int actual_length = upriv->read_urb->actual_length;
if (id == EZUSB_RID_RX) {
if ((sizeof(*ans) + offset + len) > actual_length) {
printk(KERN_ERR PFX "BAP read beyond buffer end "
"in rx frame\n");
return -EINVAL;
}
memcpy(buf, ans->data + offset, len);
return 0;
}
if (EZUSB_IS_INFO(id)) {
/* Include 4 bytes for length/type */
if ((sizeof(*ans) + offset + len - 4) > actual_length) {
printk(KERN_ERR PFX "BAP read beyond buffer end "
"in info frame\n");
return -EFAULT;
}
memcpy(buf, ans->data + offset - 4, len);
} else {
printk(KERN_ERR PFX "Unexpected fid 0x%04x\n", id);
return -EINVAL;
}
return 0;
}
static int ezusb_read_pda(struct hermes *hw, __le16 *pda,
u32 pda_addr, u16 pda_len)
{
struct ezusb_priv *upriv = hw->priv;
struct request_context *ctx;
__le16 data[] = {
cpu_to_le16(pda_addr & 0xffff),
cpu_to_le16(pda_len - 4)
};
ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_READ_PDA, EZUSB_RID_READ_PDA);
if (!ctx)
return -ENOMEM;
/* wl_lkm does not include PDA size in the PDA area.
* We will pad the information into pda, so other routines
* don't have to be modified */
pda[0] = cpu_to_le16(pda_len - 2);
/* Includes CFG_PROD_DATA but not itself */
pda[1] = cpu_to_le16(0x0800); /* CFG_PROD_DATA */
return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
EZUSB_FRAME_CONTROL, &pda[2], pda_len - 4,
NULL);
}
static int ezusb_program_init(struct hermes *hw, u32 entry_point)
{
struct ezusb_priv *upriv = hw->priv;
struct request_context *ctx;
__le32 data = cpu_to_le32(entry_point);
ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_INIT, EZUSB_RID_ACK);
if (!ctx)
return -ENOMEM;
return ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
EZUSB_FRAME_CONTROL, NULL, 0, NULL);
}
static int ezusb_program_end(struct hermes *hw)
{
struct ezusb_priv *upriv = hw->priv;
struct request_context *ctx;
ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_END, EZUSB_RID_ACK);
if (!ctx)
return -ENOMEM;
return ezusb_access_ltv(upriv, ctx, 0, NULL,
EZUSB_FRAME_CONTROL, NULL, 0, NULL);
}
static int ezusb_program_bytes(struct hermes *hw, const char *buf,
u32 addr, u32 len)
{
struct ezusb_priv *upriv = hw->priv;
struct request_context *ctx;
__le32 data = cpu_to_le32(addr);
int err;
ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_SET_ADDR, EZUSB_RID_ACK);
if (!ctx)
return -ENOMEM;
err = ezusb_access_ltv(upriv, ctx, sizeof(data), &data,
EZUSB_FRAME_CONTROL, NULL, 0, NULL);
if (err)
return err;
ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_PROG_BYTES, EZUSB_RID_ACK);
if (!ctx)
return -ENOMEM;
return ezusb_access_ltv(upriv, ctx, len, buf,
EZUSB_FRAME_CONTROL, NULL, 0, NULL);
}
static int ezusb_program(struct hermes *hw, const char *buf,
u32 addr, u32 len)
{
u32 ch_addr;
u32 ch_len;
int err = 0;
/* We can only send 2048 bytes out of the bulk xmit at a time,
* so we have to split any programming into chunks of <2048
* bytes. */
ch_len = (len < MAX_DL_SIZE) ? len : MAX_DL_SIZE;
ch_addr = addr;
while (ch_addr < (addr + len)) {
pr_debug("Programming subblock of length %d "
"to address 0x%08x. Data @ %p\n",
ch_len, ch_addr, &buf[ch_addr - addr]);
err = ezusb_program_bytes(hw, &buf[ch_addr - addr],
ch_addr, ch_len);
if (err)
break;
ch_addr += ch_len;
ch_len = ((addr + len - ch_addr) < MAX_DL_SIZE) ?
(addr + len - ch_addr) : MAX_DL_SIZE;
}
return err;
}
static netdev_tx_t ezusb_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct orinoco_private *priv = ndev_priv(dev);
struct net_device_stats *stats = &priv->stats;
struct ezusb_priv *upriv = priv->card;
u8 mic[MICHAEL_MIC_LEN+1];
int err = 0;
int tx_control;
unsigned long flags;
struct request_context *ctx;
u8 *buf;
int tx_size;
if (!netif_running(dev)) {
printk(KERN_ERR "%s: Tx on stopped device!\n",
dev->name);
return NETDEV_TX_BUSY;
}
if (netif_queue_stopped(dev)) {
printk(KERN_DEBUG "%s: Tx while transmitter busy!\n",
dev->name);
return NETDEV_TX_BUSY;
}
if (orinoco_lock(priv, &flags) != 0) {
printk(KERN_ERR
"%s: ezusb_xmit() called while hw_unavailable\n",
dev->name);
return NETDEV_TX_BUSY;
}
if (!netif_carrier_ok(dev) ||
(priv->iw_mode == NL80211_IFTYPE_MONITOR)) {
/* Oops, the firmware hasn't established a connection,
silently drop the packet (this seems to be the
safest approach). */
goto drop;
}
/* Check packet length */
if (skb->len < ETH_HLEN)
goto drop;
ctx = ezusb_alloc_ctx(upriv, EZUSB_RID_TX, 0);
if (!ctx)
goto busy;
memset(ctx->buf, 0, BULK_BUF_SIZE);
buf = ctx->buf->data;
tx_control = 0;
err = orinoco_process_xmit_skb(skb, dev, priv, &tx_control,
&mic[0]);
if (err)
goto drop;
{
__le16 *tx_cntl = (__le16 *)buf;
*tx_cntl = cpu_to_le16(tx_control);
buf += sizeof(*tx_cntl);
}
memcpy(buf, skb->data, skb->len);
buf += skb->len;
if (tx_control & HERMES_TXCTRL_MIC) {
u8 *m = mic;
/* Mic has been offset so it can be copied to an even
* address. We're copying eveything anyway, so we
* don't need to copy that first byte. */
if (skb->len % 2)
m++;
memcpy(buf, m, MICHAEL_MIC_LEN);
buf += MICHAEL_MIC_LEN;
}
/* Finally, we actually initiate the send */
netif_stop_queue(dev);
/* The card may behave better if we send evenly sized usb transfers */
tx_size = ALIGN(buf - ctx->buf->data, 2);
err = ezusb_access_ltv(upriv, ctx, tx_size, NULL,
EZUSB_FRAME_DATA, NULL, 0, NULL);
if (err) {
netif_start_queue(dev);
if (net_ratelimit())
printk(KERN_ERR "%s: Error %d transmitting packet\n",
dev->name, err);
goto busy;
}
dev->trans_start = jiffies;
stats->tx_bytes += skb->len;
goto ok;
drop:
stats->tx_errors++;
stats->tx_dropped++;
ok:
orinoco_unlock(priv, &flags);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
busy:
orinoco_unlock(priv, &flags);
return NETDEV_TX_BUSY;
}
static int ezusb_allocate(struct hermes *hw, u16 size, u16 *fid)
{
*fid = EZUSB_RID_TX;
return 0;
}
static int ezusb_hard_reset(struct orinoco_private *priv)
{
struct ezusb_priv *upriv = priv->card;
int retval = ezusb_8051_cpucs(upriv, 1);
if (retval < 0) {
err("Failed to reset");
return retval;
}
retval = ezusb_8051_cpucs(upriv, 0);
if (retval < 0) {
err("Failed to unreset");
return retval;
}
dbg("sending control message");
retval = usb_control_msg(upriv->udev,
usb_sndctrlpipe(upriv->udev, 0),
EZUSB_REQUEST_TRIGER,
USB_TYPE_VENDOR | USB_RECIP_DEVICE |
USB_DIR_OUT, 0x0, 0x0, NULL, 0,
DEF_TIMEOUT);
if (retval < 0) {
err("EZUSB_REQUEST_TRIGER failed retval %d", retval);
return retval;
}
#if 0
dbg("Sending EZUSB_REQUEST_TRIG_AC");
retval = usb_control_msg(upriv->udev,
usb_sndctrlpipe(upriv->udev, 0),
EZUSB_REQUEST_TRIG_AC,
USB_TYPE_VENDOR | USB_RECIP_DEVICE |
USB_DIR_OUT, 0x00FA, 0x0, NULL, 0,
DEF_TIMEOUT);
if (retval < 0) {
err("EZUSB_REQUEST_TRIG_AC failed retval %d", retval);
return retval;
}
#endif
return 0;
}
static int ezusb_init(hermes_t *hw)
{
struct ezusb_priv *upriv = hw->priv;
int retval;
BUG_ON(in_interrupt());
BUG_ON(!upriv);
upriv->reply_count = 0;
/* Write the MAGIC number on the simulated registers to keep
* orinoco.c happy */
hermes_write_regn(hw, SWSUPPORT0, HERMES_MAGIC);
hermes_write_regn(hw, RXFID, EZUSB_RID_RX);
usb_kill_urb(upriv->read_urb);
ezusb_submit_in_urb(upriv);
retval = ezusb_write_ltv(hw, 0, EZUSB_RID_INIT1,
HERMES_BYTES_TO_RECLEN(2), "\x10\x00");
if (retval < 0) {
printk(KERN_ERR PFX "EZUSB_RID_INIT1 error %d\n", retval);
return retval;
}
retval = ezusb_docmd_wait(hw, HERMES_CMD_INIT, 0, NULL);
if (retval < 0) {
printk(KERN_ERR PFX "HERMES_CMD_INIT error %d\n", retval);
return retval;
}
return 0;
}
static void ezusb_bulk_in_callback(struct urb *urb)
{
struct ezusb_priv *upriv = (struct ezusb_priv *) urb->context;
struct ezusb_packet *ans = urb->transfer_buffer;
u16 crc;
u16 hermes_rid;
if (upriv->udev == NULL) {
dbg("disconnected");
return;
}
if (urb->status == -ETIMEDOUT) {
/* When a device gets unplugged we get this every time
* we resubmit, flooding the logs. Since we don't use
* USB timeouts, it shouldn't happen any other time*/
pr_warning("%s: urb timed out, not resubmiting", __func__);
return;
}
if (urb->status == -ECONNABORTED) {
pr_warning("%s: connection abort, resubmiting urb",
__func__);
goto resubmit;
}
if ((urb->status == -EILSEQ)
|| (urb->status == -ENOENT)
|| (urb->status == -ECONNRESET)) {
dbg("status %d, not resubmiting", urb->status);
return;
}
if (urb->status)
dbg("status: %d length: %d",
urb->status, urb->actual_length);
if (urb->actual_length < sizeof(*ans)) {
err("%s: short read, ignoring", __func__);
goto resubmit;
}
crc = build_crc(ans);
if (le16_to_cpu(ans->crc) != crc) {
err("CRC error, ignoring packet");
goto resubmit;
}
hermes_rid = le16_to_cpu(ans->hermes_rid);
if ((hermes_rid != EZUSB_RID_RX) && !EZUSB_IS_INFO(hermes_rid)) {
ezusb_request_in_callback(upriv, urb);
} else if (upriv->dev) {
struct net_device *dev = upriv->dev;
struct orinoco_private *priv = ndev_priv(dev);
hermes_t *hw = &priv->hw;
if (hermes_rid == EZUSB_RID_RX) {
__orinoco_ev_rx(dev, hw);
} else {
hermes_write_regn(hw, INFOFID,
le16_to_cpu(ans->hermes_rid));
__orinoco_ev_info(dev, hw);
}
}
resubmit:
if (upriv->udev)
ezusb_submit_in_urb(upriv);
}
static inline void ezusb_delete(struct ezusb_priv *upriv)
{
struct net_device *dev;
struct list_head *item;
struct list_head *tmp_item;
unsigned long flags;
BUG_ON(in_interrupt());
BUG_ON(!upriv);
dev = upriv->dev;
mutex_lock(&upriv->mtx);
upriv->udev = NULL; /* No timer will be rearmed from here */
usb_kill_urb(upriv->read_urb);
spin_lock_irqsave(&upriv->req_lock, flags);
list_for_each_safe(item, tmp_item, &upriv->req_active) {
struct request_context *ctx;
int err;
ctx = list_entry(item, struct request_context, list);
atomic_inc(&ctx->refcount);
ctx->outurb->transfer_flags |= URB_ASYNC_UNLINK;
err = usb_unlink_urb(ctx->outurb);
spin_unlock_irqrestore(&upriv->req_lock, flags);
if (err == -EINPROGRESS)
wait_for_completion(&ctx->done);
del_timer_sync(&ctx->timer);
/* FIXME: there is an slight chance for the irq handler to
* be running */
if (!list_empty(&ctx->list))
ezusb_ctx_complete(ctx);
ezusb_request_context_put(ctx);
spin_lock_irqsave(&upriv->req_lock, flags);
}
spin_unlock_irqrestore(&upriv->req_lock, flags);
list_for_each_safe(item, tmp_item, &upriv->req_pending)
ezusb_ctx_complete(list_entry(item,
struct request_context, list));
if (upriv->read_urb->status == -EINPROGRESS)
printk(KERN_ERR PFX "Some URB in progress\n");
mutex_unlock(&upriv->mtx);
kfree(upriv->read_urb->transfer_buffer);
if (upriv->bap_buf != NULL)
kfree(upriv->bap_buf);
if (upriv->read_urb != NULL)
usb_free_urb(upriv->read_urb);
if (upriv->dev) {
struct orinoco_private *priv = ndev_priv(upriv->dev);
orinoco_if_del(priv);
free_orinocodev(priv);
}
}
static void ezusb_lock_irqsave(spinlock_t *lock,
unsigned long *flags) __acquires(lock)
{
spin_lock_bh(lock);
}
static void ezusb_unlock_irqrestore(spinlock_t *lock,
unsigned long *flags) __releases(lock)
{
spin_unlock_bh(lock);
}
static void ezusb_lock_irq(spinlock_t *lock) __acquires(lock)
{
spin_lock_bh(lock);
}
static void ezusb_unlock_irq(spinlock_t *lock) __releases(lock)
{
spin_unlock_bh(lock);
}
static const struct hermes_ops ezusb_ops = {
.init = ezusb_init,
.cmd_wait = ezusb_docmd_wait,
.init_cmd_wait = ezusb_doicmd_wait,
.allocate = ezusb_allocate,
.read_ltv = ezusb_read_ltv,
.write_ltv = ezusb_write_ltv,
.bap_pread = ezusb_bap_pread,
.read_pda = ezusb_read_pda,
.program_init = ezusb_program_init,
.program_end = ezusb_program_end,
.program = ezusb_program,
.lock_irqsave = ezusb_lock_irqsave,
.unlock_irqrestore = ezusb_unlock_irqrestore,
.lock_irq = ezusb_lock_irq,
.unlock_irq = ezusb_unlock_irq,
};
static const struct net_device_ops ezusb_netdev_ops = {
.ndo_open = orinoco_open,
.ndo_stop = orinoco_stop,
.ndo_start_xmit = ezusb_xmit,
.ndo_set_multicast_list = orinoco_set_multicast_list,
.ndo_change_mtu = orinoco_change_mtu,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
.ndo_tx_timeout = orinoco_tx_timeout,
.ndo_get_stats = orinoco_get_stats,
};
static int ezusb_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
struct usb_device *udev = interface_to_usbdev(interface);
struct orinoco_private *priv;
hermes_t *hw;
struct ezusb_priv *upriv = NULL;
struct usb_interface_descriptor *iface_desc;
struct usb_endpoint_descriptor *ep;
const struct firmware *fw_entry;
int retval = 0;
int i;
priv = alloc_orinocodev(sizeof(*upriv), &udev->dev,
ezusb_hard_reset, NULL);
if (!priv) {
err("Couldn't allocate orinocodev");
goto exit;
}
hw = &priv->hw;
upriv = priv->card;
mutex_init(&upriv->mtx);
spin_lock_init(&upriv->reply_count_lock);
spin_lock_init(&upriv->req_lock);
INIT_LIST_HEAD(&upriv->req_pending);
INIT_LIST_HEAD(&upriv->req_active);
upriv->udev = udev;
hw->iobase = (void __force __iomem *) &upriv->hermes_reg_fake;
hw->reg_spacing = HERMES_16BIT_REGSPACING;
hw->priv = upriv;
hw->ops = &ezusb_ops;
/* set up the endpoint information */
/* check out the endpoints */
iface_desc = &interface->altsetting[0].desc;
for (i = 0; i < iface_desc->bNumEndpoints; ++i) {
ep = &interface->altsetting[0].endpoint[i].desc;
if (((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
== USB_DIR_IN) &&
((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
== USB_ENDPOINT_XFER_BULK)) {
/* we found a bulk in endpoint */
if (upriv->read_urb != NULL) {
pr_warning("Found a second bulk in ep, ignored");
continue;
}
upriv->read_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!upriv->read_urb) {
err("No free urbs available");
goto error;
}
if (le16_to_cpu(ep->wMaxPacketSize) != 64)
pr_warning("bulk in: wMaxPacketSize!= 64");
if (ep->bEndpointAddress != (2 | USB_DIR_IN))
pr_warning("bulk in: bEndpointAddress: %d",
ep->bEndpointAddress);
upriv->read_pipe = usb_rcvbulkpipe(udev,
ep->
bEndpointAddress);
upriv->read_urb->transfer_buffer =
kmalloc(BULK_BUF_SIZE, GFP_KERNEL);
if (!upriv->read_urb->transfer_buffer) {
err("Couldn't allocate IN buffer");
goto error;
}
}
if (((ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
== USB_DIR_OUT) &&
((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
== USB_ENDPOINT_XFER_BULK)) {
/* we found a bulk out endpoint */
if (upriv->bap_buf != NULL) {
pr_warning("Found a second bulk out ep, ignored");
continue;
}
if (le16_to_cpu(ep->wMaxPacketSize) != 64)
pr_warning("bulk out: wMaxPacketSize != 64");
if (ep->bEndpointAddress != 2)
pr_warning("bulk out: bEndpointAddress: %d",
ep->bEndpointAddress);
upriv->write_pipe = usb_sndbulkpipe(udev,
ep->
bEndpointAddress);
upriv->bap_buf = kmalloc(BULK_BUF_SIZE, GFP_KERNEL);
if (!upriv->bap_buf) {
err("Couldn't allocate bulk_out_buffer");
goto error;
}
}
}
if (!upriv->bap_buf || !upriv->read_urb) {
err("Didn't find the required bulk endpoints");
goto error;
}
if (request_firmware(&fw_entry, "orinoco_ezusb_fw",
&interface->dev) == 0) {
firmware.size = fw_entry->size;
firmware.code = fw_entry->data;
}
if (firmware.size && firmware.code) {
ezusb_firmware_download(upriv, &firmware);
} else {
err("No firmware to download");
goto error;
}
if (ezusb_hard_reset(priv) < 0) {
err("Cannot reset the device");
goto error;
}
/* If the firmware is already downloaded orinoco.c will call
* ezusb_init but if the firmware is not already there, that will make
* the kernel very unstable, so we try initializing here and quit in
* case of error */
if (ezusb_init(hw) < 0) {
err("Couldn't initialize the device");
err("Firmware may not be downloaded or may be wrong.");
goto error;
}
/* Initialise the main driver */
if (orinoco_init(priv) != 0) {
err("orinoco_init() failed\n");
goto error;
}
if (orinoco_if_add(priv, 0, 0, &ezusb_netdev_ops) != 0) {
upriv->dev = NULL;
err("%s: orinoco_if_add() failed", __func__);
goto error;
}
upriv->dev = priv->ndev;
goto exit;
error:
ezusb_delete(upriv);
if (upriv->dev) {
/* upriv->dev was 0, so ezusb_delete() didn't free it */
free_orinocodev(priv);
}
upriv = NULL;
retval = -EFAULT;
exit:
if (fw_entry) {
firmware.code = NULL;
firmware.size = 0;
release_firmware(fw_entry);
}
usb_set_intfdata(interface, upriv);
return retval;
}
static void ezusb_disconnect(struct usb_interface *intf)
{
struct ezusb_priv *upriv = usb_get_intfdata(intf);
usb_set_intfdata(intf, NULL);
ezusb_delete(upriv);
printk(KERN_INFO PFX "Disconnected\n");
}
/* usb specific object needed to register this driver with the usb subsystem */
static struct usb_driver orinoco_driver = {
.name = DRIVER_NAME,
.probe = ezusb_probe,
.disconnect = ezusb_disconnect,
.id_table = ezusb_table,
};
/* Can't be declared "const" or the whole __initdata section will
* become const */
static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
" (Manuel Estrada Sainz)";
static int __init ezusb_module_init(void)
{
int err;
printk(KERN_DEBUG "%s\n", version);
/* register this driver with the USB subsystem */
err = usb_register(&orinoco_driver);
if (err < 0) {
printk(KERN_ERR PFX "usb_register failed, error %d\n",
err);
return err;
}
return 0;
}
static void __exit ezusb_module_exit(void)
{
/* deregister this driver with the USB subsystem */
usb_deregister(&orinoco_driver);
}
module_init(ezusb_module_init);
module_exit(ezusb_module_exit);
MODULE_AUTHOR("Manuel Estrada Sainz");
MODULE_DESCRIPTION
("Driver for Orinoco wireless LAN cards using EZUSB bridge");
MODULE_LICENSE("Dual MPL/GPL");
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