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ubuntu-linux-kernel/drivers/net/wireless/intersil/prism54/islpci_dev.c

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/*
* Copyright (C) 2002 Intersil Americas Inc.
* Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org>
* Copyright (C) 2003 Luis R. Rodriguez <mcgrof@ruslug.rutgers.edu>
*
* 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
*
* 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, see <http://www.gnu.org/licenses/>.
*
*/
#include <linux/hardirq.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
#include <linux/ethtool.h>
#include <linux/pci.h>
#include <linux/sched.h>
#include <linux/etherdevice.h>
#include <linux/delay.h>
#include <linux/if_arp.h>
#include <asm/io.h>
#include "prismcompat.h"
#include "isl_38xx.h"
#include "isl_ioctl.h"
#include "islpci_dev.h"
#include "islpci_mgt.h"
#include "islpci_eth.h"
#include "oid_mgt.h"
#define ISL3877_IMAGE_FILE "isl3877"
#define ISL3886_IMAGE_FILE "isl3886"
#define ISL3890_IMAGE_FILE "isl3890"
MODULE_FIRMWARE(ISL3877_IMAGE_FILE);
MODULE_FIRMWARE(ISL3886_IMAGE_FILE);
MODULE_FIRMWARE(ISL3890_IMAGE_FILE);
static int prism54_bring_down(islpci_private *);
static int islpci_alloc_memory(islpci_private *);
/* Temporary dummy MAC address to use until firmware is loaded.
* The idea there is that some tools (such as nameif) may query
* the MAC address before the netdev is 'open'. By using a valid
* OUI prefix, they can process the netdev properly.
* Of course, this is not the final/real MAC address. It doesn't
* matter, as you are suppose to be able to change it anytime via
* ndev->set_mac_address. Jean II */
static const unsigned char dummy_mac[6] = { 0x00, 0x30, 0xB4, 0x00, 0x00, 0x00 };
static int
isl_upload_firmware(islpci_private *priv)
{
u32 reg, rc;
void __iomem *device_base = priv->device_base;
/* clear the RAMBoot and the Reset bit */
reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
reg &= ~ISL38XX_CTRL_STAT_RESET;
reg &= ~ISL38XX_CTRL_STAT_RAMBOOT;
writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
wmb();
udelay(ISL38XX_WRITEIO_DELAY);
/* set the Reset bit without reading the register ! */
reg |= ISL38XX_CTRL_STAT_RESET;
writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
wmb();
udelay(ISL38XX_WRITEIO_DELAY);
/* clear the Reset bit */
reg &= ~ISL38XX_CTRL_STAT_RESET;
writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
wmb();
/* wait a while for the device to reboot */
mdelay(50);
{
const struct firmware *fw_entry = NULL;
long fw_len;
const u32 *fw_ptr;
rc = request_firmware(&fw_entry, priv->firmware, PRISM_FW_PDEV);
if (rc) {
printk(KERN_ERR
"%s: request_firmware() failed for '%s'\n",
"prism54", priv->firmware);
return rc;
}
/* prepare the Direct Memory Base register */
reg = ISL38XX_DEV_FIRMWARE_ADDRES;
fw_ptr = (u32 *) fw_entry->data;
fw_len = fw_entry->size;
if (fw_len % 4) {
printk(KERN_ERR
"%s: firmware '%s' size is not multiple of 32bit, aborting!\n",
"prism54", priv->firmware);
release_firmware(fw_entry);
return -EILSEQ; /* Illegal byte sequence */;
}
while (fw_len > 0) {
long _fw_len =
(fw_len >
ISL38XX_MEMORY_WINDOW_SIZE) ?
ISL38XX_MEMORY_WINDOW_SIZE : fw_len;
u32 __iomem *dev_fw_ptr = device_base + ISL38XX_DIRECT_MEM_WIN;
/* set the card's base address for writing the data */
isl38xx_w32_flush(device_base, reg,
ISL38XX_DIR_MEM_BASE_REG);
wmb(); /* be paranoid */
/* increment the write address for next iteration */
reg += _fw_len;
fw_len -= _fw_len;
/* write the data to the Direct Memory Window 32bit-wise */
/* memcpy_toio() doesn't guarantee 32bit writes :-| */
while (_fw_len > 0) {
/* use non-swapping writel() */
__raw_writel(*fw_ptr, dev_fw_ptr);
fw_ptr++, dev_fw_ptr++;
_fw_len -= 4;
}
/* flush PCI posting */
(void) readl(device_base + ISL38XX_PCI_POSTING_FLUSH);
wmb(); /* be paranoid again */
BUG_ON(_fw_len != 0);
}
BUG_ON(fw_len != 0);
/* Firmware version is at offset 40 (also for "newmac") */
printk(KERN_DEBUG "%s: firmware version: %.8s\n",
priv->ndev->name, fw_entry->data + 40);
release_firmware(fw_entry);
}
/* now reset the device
* clear the Reset & ClkRun bit, set the RAMBoot bit */
reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
reg &= ~ISL38XX_CTRL_STAT_CLKRUN;
reg &= ~ISL38XX_CTRL_STAT_RESET;
reg |= ISL38XX_CTRL_STAT_RAMBOOT;
isl38xx_w32_flush(device_base, reg, ISL38XX_CTRL_STAT_REG);
wmb();
udelay(ISL38XX_WRITEIO_DELAY);
/* set the reset bit latches the host override and RAMBoot bits
* into the device for operation when the reset bit is reset */
reg |= ISL38XX_CTRL_STAT_RESET;
writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
/* don't do flush PCI posting here! */
wmb();
udelay(ISL38XX_WRITEIO_DELAY);
/* clear the reset bit should start the whole circus */
reg &= ~ISL38XX_CTRL_STAT_RESET;
writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
/* don't do flush PCI posting here! */
wmb();
udelay(ISL38XX_WRITEIO_DELAY);
return 0;
}
/******************************************************************************
Device Interrupt Handler
******************************************************************************/
irqreturn_t
islpci_interrupt(int irq, void *config)
{
u32 reg;
islpci_private *priv = config;
struct net_device *ndev = priv->ndev;
void __iomem *device = priv->device_base;
int powerstate = ISL38XX_PSM_POWERSAVE_STATE;
/* lock the interrupt handler */
spin_lock(&priv->slock);
/* received an interrupt request on a shared IRQ line
* first check whether the device is in sleep mode */
reg = readl(device + ISL38XX_CTRL_STAT_REG);
if (reg & ISL38XX_CTRL_STAT_SLEEPMODE)
/* device is in sleep mode, IRQ was generated by someone else */
{
#if VERBOSE > SHOW_ERROR_MESSAGES
DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
#endif
spin_unlock(&priv->slock);
return IRQ_NONE;
}
/* check whether there is any source of interrupt on the device */
reg = readl(device + ISL38XX_INT_IDENT_REG);
/* also check the contents of the Interrupt Enable Register, because this
* will filter out interrupt sources from other devices on the same irq ! */
reg &= readl(device + ISL38XX_INT_EN_REG);
reg &= ISL38XX_INT_SOURCES;
if (reg != 0) {
if (islpci_get_state(priv) != PRV_STATE_SLEEP)
powerstate = ISL38XX_PSM_ACTIVE_STATE;
/* reset the request bits in the Identification register */
isl38xx_w32_flush(device, reg, ISL38XX_INT_ACK_REG);
#if VERBOSE > SHOW_ERROR_MESSAGES
DEBUG(SHOW_FUNCTION_CALLS,
"IRQ: Identification register 0x%p 0x%x\n", device, reg);
#endif
/* check for each bit in the register separately */
if (reg & ISL38XX_INT_IDENT_UPDATE) {
#if VERBOSE > SHOW_ERROR_MESSAGES
/* Queue has been updated */
DEBUG(SHOW_TRACING, "IRQ: Update flag\n");
DEBUG(SHOW_QUEUE_INDEXES,
"CB drv Qs: [%i][%i][%i][%i][%i][%i]\n",
le32_to_cpu(priv->control_block->
driver_curr_frag[0]),
le32_to_cpu(priv->control_block->
driver_curr_frag[1]),
le32_to_cpu(priv->control_block->
driver_curr_frag[2]),
le32_to_cpu(priv->control_block->
driver_curr_frag[3]),
le32_to_cpu(priv->control_block->
driver_curr_frag[4]),
le32_to_cpu(priv->control_block->
driver_curr_frag[5])
);
DEBUG(SHOW_QUEUE_INDEXES,
"CB dev Qs: [%i][%i][%i][%i][%i][%i]\n",
le32_to_cpu(priv->control_block->
device_curr_frag[0]),
le32_to_cpu(priv->control_block->
device_curr_frag[1]),
le32_to_cpu(priv->control_block->
device_curr_frag[2]),
le32_to_cpu(priv->control_block->
device_curr_frag[3]),
le32_to_cpu(priv->control_block->
device_curr_frag[4]),
le32_to_cpu(priv->control_block->
device_curr_frag[5])
);
#endif
/* cleanup the data low transmit queue */
islpci_eth_cleanup_transmit(priv, priv->control_block);
/* device is in active state, update the
* powerstate flag if necessary */
powerstate = ISL38XX_PSM_ACTIVE_STATE;
/* check all three queues in priority order
* call the PIMFOR receive function until the
* queue is empty */
if (isl38xx_in_queue(priv->control_block,
ISL38XX_CB_RX_MGMTQ) != 0) {
#if VERBOSE > SHOW_ERROR_MESSAGES
DEBUG(SHOW_TRACING,
"Received frame in Management Queue\n");
#endif
islpci_mgt_receive(ndev);
islpci_mgt_cleanup_transmit(ndev);
/* Refill slots in receive queue */
islpci_mgmt_rx_fill(ndev);
/* no need to trigger the device, next
islpci_mgt_transaction does it */
}
while (isl38xx_in_queue(priv->control_block,
ISL38XX_CB_RX_DATA_LQ) != 0) {
#if VERBOSE > SHOW_ERROR_MESSAGES
DEBUG(SHOW_TRACING,
"Received frame in Data Low Queue\n");
#endif
islpci_eth_receive(priv);
}
/* check whether the data transmit queues were full */
if (priv->data_low_tx_full) {
/* check whether the transmit is not full anymore */
if (ISL38XX_CB_TX_QSIZE -
isl38xx_in_queue(priv->control_block,
ISL38XX_CB_TX_DATA_LQ) >=
ISL38XX_MIN_QTHRESHOLD) {
/* nope, the driver is ready for more network frames */
netif_wake_queue(priv->ndev);
/* reset the full flag */
priv->data_low_tx_full = 0;
}
}
}
if (reg & ISL38XX_INT_IDENT_INIT) {
/* Device has been initialized */
#if VERBOSE > SHOW_ERROR_MESSAGES
DEBUG(SHOW_TRACING,
"IRQ: Init flag, device initialized\n");
#endif
wake_up(&priv->reset_done);
}
if (reg & ISL38XX_INT_IDENT_SLEEP) {
/* Device intends to move to powersave state */
#if VERBOSE > SHOW_ERROR_MESSAGES
DEBUG(SHOW_TRACING, "IRQ: Sleep flag\n");
#endif
isl38xx_handle_sleep_request(priv->control_block,
&powerstate,
priv->device_base);
}
if (reg & ISL38XX_INT_IDENT_WAKEUP) {
/* Device has been woken up to active state */
#if VERBOSE > SHOW_ERROR_MESSAGES
DEBUG(SHOW_TRACING, "IRQ: Wakeup flag\n");
#endif
isl38xx_handle_wakeup(priv->control_block,
&powerstate, priv->device_base);
}
} else {
#if VERBOSE > SHOW_ERROR_MESSAGES
DEBUG(SHOW_TRACING, "Assuming someone else called the IRQ\n");
#endif
spin_unlock(&priv->slock);
return IRQ_NONE;
}
/* sleep -> ready */
if (islpci_get_state(priv) == PRV_STATE_SLEEP
&& powerstate == ISL38XX_PSM_ACTIVE_STATE)
islpci_set_state(priv, PRV_STATE_READY);
/* !sleep -> sleep */
if (islpci_get_state(priv) != PRV_STATE_SLEEP
&& powerstate == ISL38XX_PSM_POWERSAVE_STATE)
islpci_set_state(priv, PRV_STATE_SLEEP);
/* unlock the interrupt handler */
spin_unlock(&priv->slock);
return IRQ_HANDLED;
}
/******************************************************************************
Network Interface Control & Statistical functions
******************************************************************************/
static int
islpci_open(struct net_device *ndev)
{
u32 rc;
islpci_private *priv = netdev_priv(ndev);
/* reset data structures, upload firmware and reset device */
rc = islpci_reset(priv,1);
if (rc) {
prism54_bring_down(priv);
return rc; /* Returns informative message */
}
netif_start_queue(ndev);
/* Turn off carrier if in STA or Ad-hoc mode. It will be turned on
* once the firmware receives a trap of being associated
* (GEN_OID_LINKSTATE). In other modes (AP or WDS or monitor) we
* should just leave the carrier on as its expected the firmware
* won't send us a trigger. */
if (priv->iw_mode == IW_MODE_INFRA || priv->iw_mode == IW_MODE_ADHOC)
netif_carrier_off(ndev);
else
netif_carrier_on(ndev);
return 0;
}
static int
islpci_close(struct net_device *ndev)
{
islpci_private *priv = netdev_priv(ndev);
printk(KERN_DEBUG "%s: islpci_close ()\n", ndev->name);
netif_stop_queue(ndev);
return prism54_bring_down(priv);
}
static int
prism54_bring_down(islpci_private *priv)
{
void __iomem *device_base = priv->device_base;
u32 reg;
/* we are going to shutdown the device */
islpci_set_state(priv, PRV_STATE_PREBOOT);
/* disable all device interrupts in case they weren't */
isl38xx_disable_interrupts(priv->device_base);
/* For safety reasons, we may want to ensure that no DMA transfer is
* currently in progress by emptying the TX and RX queues. */
/* wait until interrupts have finished executing on other CPUs */
synchronize_irq(priv->pdev->irq);
reg = readl(device_base + ISL38XX_CTRL_STAT_REG);
reg &= ~(ISL38XX_CTRL_STAT_RESET | ISL38XX_CTRL_STAT_RAMBOOT);
writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
wmb();
udelay(ISL38XX_WRITEIO_DELAY);
reg |= ISL38XX_CTRL_STAT_RESET;
writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
wmb();
udelay(ISL38XX_WRITEIO_DELAY);
/* clear the Reset bit */
reg &= ~ISL38XX_CTRL_STAT_RESET;
writel(reg, device_base + ISL38XX_CTRL_STAT_REG);
wmb();
/* wait a while for the device to reset */
schedule_timeout_uninterruptible(msecs_to_jiffies(50));
return 0;
}
static int
islpci_upload_fw(islpci_private *priv)
{
islpci_state_t old_state;
u32 rc;
old_state = islpci_set_state(priv, PRV_STATE_BOOT);
printk(KERN_DEBUG "%s: uploading firmware...\n", priv->ndev->name);
rc = isl_upload_firmware(priv);
if (rc) {
/* error uploading the firmware */
printk(KERN_ERR "%s: could not upload firmware ('%s')\n",
priv->ndev->name, priv->firmware);
islpci_set_state(priv, old_state);
return rc;
}
printk(KERN_DEBUG "%s: firmware upload complete\n",
priv->ndev->name);
islpci_set_state(priv, PRV_STATE_POSTBOOT);
return 0;
}
static int
islpci_reset_if(islpci_private *priv)
{
long remaining;
int result = -ETIME;
int count;
DEFINE_WAIT(wait);
prepare_to_wait(&priv->reset_done, &wait, TASK_UNINTERRUPTIBLE);
/* now the last step is to reset the interface */
isl38xx_interface_reset(priv->device_base, priv->device_host_address);
islpci_set_state(priv, PRV_STATE_PREINIT);
for(count = 0; count < 2 && result; count++) {
/* The software reset acknowledge needs about 220 msec here.
* Be conservative and wait for up to one second. */
remaining = schedule_timeout_uninterruptible(HZ);
if(remaining > 0) {
result = 0;
break;
}
/* If we're here it's because our IRQ hasn't yet gone through.
* Retry a bit more...
*/
printk(KERN_ERR "%s: no 'reset complete' IRQ seen - retrying\n",
priv->ndev->name);
}
finish_wait(&priv->reset_done, &wait);
if (result) {
printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
return result;
}
islpci_set_state(priv, PRV_STATE_INIT);
/* Now that the device is 100% up, let's allow
* for the other interrupts --
* NOTE: this is not *yet* true since we've only allowed the
* INIT interrupt on the IRQ line. We can perhaps poll
* the IRQ line until we know for sure the reset went through */
isl38xx_enable_common_interrupts(priv->device_base);
down_write(&priv->mib_sem);
result = mgt_commit(priv);
if (result) {
printk(KERN_ERR "%s: interface reset failure\n", priv->ndev->name);
up_write(&priv->mib_sem);
return result;
}
up_write(&priv->mib_sem);
islpci_set_state(priv, PRV_STATE_READY);
printk(KERN_DEBUG "%s: interface reset complete\n", priv->ndev->name);
return 0;
}
int
islpci_reset(islpci_private *priv, int reload_firmware)
{
isl38xx_control_block *cb = /* volatile not needed */
(isl38xx_control_block *) priv->control_block;
unsigned counter;
int rc;
if (reload_firmware)
islpci_set_state(priv, PRV_STATE_PREBOOT);
else
islpci_set_state(priv, PRV_STATE_POSTBOOT);
printk(KERN_DEBUG "%s: resetting device...\n", priv->ndev->name);
/* disable all device interrupts in case they weren't */
isl38xx_disable_interrupts(priv->device_base);
/* flush all management queues */
priv->index_mgmt_tx = 0;
priv->index_mgmt_rx = 0;
/* clear the indexes in the frame pointer */
for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
cb->driver_curr_frag[counter] = cpu_to_le32(0);
cb->device_curr_frag[counter] = cpu_to_le32(0);
}
/* reset the mgmt receive queue */
for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
isl38xx_fragment *frag = &cb->rx_data_mgmt[counter];
frag->size = cpu_to_le16(MGMT_FRAME_SIZE);
frag->flags = 0;
frag->address = cpu_to_le32(priv->mgmt_rx[counter].pci_addr);
}
for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
cb->rx_data_low[counter].address =
cpu_to_le32((u32) priv->pci_map_rx_address[counter]);
}
/* since the receive queues are filled with empty fragments, now we can
* set the corresponding indexes in the Control Block */
priv->control_block->driver_curr_frag[ISL38XX_CB_RX_DATA_LQ] =
cpu_to_le32(ISL38XX_CB_RX_QSIZE);
priv->control_block->driver_curr_frag[ISL38XX_CB_RX_MGMTQ] =
cpu_to_le32(ISL38XX_CB_MGMT_QSIZE);
/* reset the remaining real index registers and full flags */
priv->free_data_rx = 0;
priv->free_data_tx = 0;
priv->data_low_tx_full = 0;
if (reload_firmware) { /* Should we load the firmware ? */
/* now that the data structures are cleaned up, upload
* firmware and reset interface */
rc = islpci_upload_fw(priv);
if (rc) {
printk(KERN_ERR "%s: islpci_reset: failure\n",
priv->ndev->name);
return rc;
}
}
/* finally reset interface */
rc = islpci_reset_if(priv);
if (rc)
printk(KERN_ERR "prism54: Your card/socket may be faulty, or IRQ line too busy :(\n");
return rc;
}
/******************************************************************************
Network device configuration functions
******************************************************************************/
static int
islpci_alloc_memory(islpci_private *priv)
{
int counter;
#if VERBOSE > SHOW_ERROR_MESSAGES
printk(KERN_DEBUG "islpci_alloc_memory\n");
#endif
/* remap the PCI device base address to accessible */
if (!(priv->device_base =
ioremap(pci_resource_start(priv->pdev, 0),
ISL38XX_PCI_MEM_SIZE))) {
/* error in remapping the PCI device memory address range */
printk(KERN_ERR "PCI memory remapping failed\n");
return -1;
}
/* memory layout for consistent DMA region:
*
* Area 1: Control Block for the device interface
* Area 2: Power Save Mode Buffer for temporary frame storage. Be aware that
* the number of supported stations in the AP determines the minimal
* size of the buffer !
*/
/* perform the allocation */
priv->driver_mem_address = pci_alloc_consistent(priv->pdev,
HOST_MEM_BLOCK,
&priv->
device_host_address);
if (!priv->driver_mem_address) {
/* error allocating the block of PCI memory */
printk(KERN_ERR "%s: could not allocate DMA memory, aborting!",
"prism54");
return -1;
}
/* assign the Control Block to the first address of the allocated area */
priv->control_block =
(isl38xx_control_block *) priv->driver_mem_address;
/* set the Power Save Buffer pointer directly behind the CB */
priv->device_psm_buffer =
priv->device_host_address + CONTROL_BLOCK_SIZE;
/* make sure all buffer pointers are initialized */
for (counter = 0; counter < ISL38XX_CB_QCOUNT; counter++) {
priv->control_block->driver_curr_frag[counter] = cpu_to_le32(0);
priv->control_block->device_curr_frag[counter] = cpu_to_le32(0);
}
priv->index_mgmt_rx = 0;
memset(priv->mgmt_rx, 0, sizeof(priv->mgmt_rx));
memset(priv->mgmt_tx, 0, sizeof(priv->mgmt_tx));
/* allocate rx queue for management frames */
if (islpci_mgmt_rx_fill(priv->ndev) < 0)
goto out_free;
/* now get the data rx skb's */
memset(priv->data_low_rx, 0, sizeof (priv->data_low_rx));
memset(priv->pci_map_rx_address, 0, sizeof (priv->pci_map_rx_address));
for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
struct sk_buff *skb;
/* allocate an sk_buff for received data frames storage
* each frame on receive size consists of 1 fragment
* include any required allignment operations */
if (!(skb = dev_alloc_skb(MAX_FRAGMENT_SIZE_RX + 2))) {
/* error allocating an sk_buff structure elements */
printk(KERN_ERR "Error allocating skb.\n");
skb = NULL;
goto out_free;
}
skb_reserve(skb, (4 - (long) skb->data) & 0x03);
/* add the new allocated sk_buff to the buffer array */
priv->data_low_rx[counter] = skb;
/* map the allocated skb data area to pci */
priv->pci_map_rx_address[counter] =
pci_map_single(priv->pdev, (void *) skb->data,
MAX_FRAGMENT_SIZE_RX + 2,
PCI_DMA_FROMDEVICE);
if (pci_dma_mapping_error(priv->pdev,
priv->pci_map_rx_address[counter])) {
priv->pci_map_rx_address[counter] = 0;
/* error mapping the buffer to device
accessible memory address */
printk(KERN_ERR "failed to map skb DMA'able\n");
goto out_free;
}
}
prism54_acl_init(&priv->acl);
prism54_wpa_bss_ie_init(priv);
if (mgt_init(priv))
goto out_free;
return 0;
out_free:
islpci_free_memory(priv);
return -1;
}
int
islpci_free_memory(islpci_private *priv)
{
int counter;
if (priv->device_base)
iounmap(priv->device_base);
priv->device_base = NULL;
/* free consistent DMA area... */
if (priv->driver_mem_address)
pci_free_consistent(priv->pdev, HOST_MEM_BLOCK,
priv->driver_mem_address,
priv->device_host_address);
/* clear some dangling pointers */
priv->driver_mem_address = NULL;
priv->device_host_address = 0;
priv->device_psm_buffer = 0;
priv->control_block = NULL;
/* clean up mgmt rx buffers */
for (counter = 0; counter < ISL38XX_CB_MGMT_QSIZE; counter++) {
struct islpci_membuf *buf = &priv->mgmt_rx[counter];
if (buf->pci_addr)
pci_unmap_single(priv->pdev, buf->pci_addr,
buf->size, PCI_DMA_FROMDEVICE);
buf->pci_addr = 0;
kfree(buf->mem);
buf->size = 0;
buf->mem = NULL;
}
/* clean up data rx buffers */
for (counter = 0; counter < ISL38XX_CB_RX_QSIZE; counter++) {
if (priv->pci_map_rx_address[counter])
pci_unmap_single(priv->pdev,
priv->pci_map_rx_address[counter],
MAX_FRAGMENT_SIZE_RX + 2,
PCI_DMA_FROMDEVICE);
priv->pci_map_rx_address[counter] = 0;
if (priv->data_low_rx[counter])
dev_kfree_skb(priv->data_low_rx[counter]);
priv->data_low_rx[counter] = NULL;
}
/* Free the access control list and the WPA list */
prism54_acl_clean(&priv->acl);
prism54_wpa_bss_ie_clean(priv);
mgt_clean(priv);
return 0;
}
#if 0
static void
islpci_set_multicast_list(struct net_device *dev)
{
/* put device into promisc mode and let network layer handle it */
}
#endif
static void islpci_ethtool_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *info)
{
strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
strlcpy(info->version, DRV_VERSION, sizeof(info->version));
}
static const struct ethtool_ops islpci_ethtool_ops = {
.get_drvinfo = islpci_ethtool_get_drvinfo,
};
static const struct net_device_ops islpci_netdev_ops = {
.ndo_open = islpci_open,
.ndo_stop = islpci_close,
.ndo_start_xmit = islpci_eth_transmit,
.ndo_tx_timeout = islpci_eth_tx_timeout,
.ndo_set_mac_address = prism54_set_mac_address,
.ndo_validate_addr = eth_validate_addr,
};
static struct device_type wlan_type = {
.name = "wlan",
};
struct net_device *
islpci_setup(struct pci_dev *pdev)
{
islpci_private *priv;
struct net_device *ndev = alloc_etherdev(sizeof (islpci_private));
if (!ndev)
return ndev;
pci_set_drvdata(pdev, ndev);
SET_NETDEV_DEV(ndev, &pdev->dev);
SET_NETDEV_DEVTYPE(ndev, &wlan_type);
/* setup the structure members */
ndev->base_addr = pci_resource_start(pdev, 0);
ndev->irq = pdev->irq;
/* initialize the function pointers */
ndev->netdev_ops = &islpci_netdev_ops;
ndev->wireless_handlers = &prism54_handler_def;
ndev->ethtool_ops = &islpci_ethtool_ops;
/* ndev->set_multicast_list = &islpci_set_multicast_list; */
ndev->addr_len = ETH_ALEN;
/* Get a non-zero dummy MAC address for nameif. Jean II */
memcpy(ndev->dev_addr, dummy_mac, ETH_ALEN);
ndev->watchdog_timeo = ISLPCI_TX_TIMEOUT;
/* allocate a private device structure to the network device */
priv = netdev_priv(ndev);
priv->ndev = ndev;
priv->pdev = pdev;
priv->monitor_type = ARPHRD_IEEE80211;
priv->ndev->type = (priv->iw_mode == IW_MODE_MONITOR) ?
priv->monitor_type : ARPHRD_ETHER;
/* Add pointers to enable iwspy support. */
priv->wireless_data.spy_data = &priv->spy_data;
ndev->wireless_data = &priv->wireless_data;
/* save the start and end address of the PCI memory area */
ndev->mem_start = (unsigned long) priv->device_base;
ndev->mem_end = ndev->mem_start + ISL38XX_PCI_MEM_SIZE;
#if VERBOSE > SHOW_ERROR_MESSAGES
DEBUG(SHOW_TRACING, "PCI Memory remapped to 0x%p\n", priv->device_base);
#endif
init_waitqueue_head(&priv->reset_done);
/* init the queue read locks, process wait counter */
mutex_init(&priv->mgmt_lock);
priv->mgmt_received = NULL;
init_waitqueue_head(&priv->mgmt_wqueue);
mutex_init(&priv->stats_lock);
spin_lock_init(&priv->slock);
/* init state machine with off#1 state */
priv->state = PRV_STATE_OFF;
priv->state_off = 1;
/* initialize workqueue's */
INIT_WORK(&priv->stats_work, prism54_update_stats);
priv->stats_timestamp = 0;
INIT_WORK(&priv->reset_task, islpci_do_reset_and_wake);
priv->reset_task_pending = 0;
/* allocate various memory areas */
if (islpci_alloc_memory(priv))
goto do_free_netdev;
/* select the firmware file depending on the device id */
switch (pdev->device) {
case 0x3877:
strcpy(priv->firmware, ISL3877_IMAGE_FILE);
break;
case 0x3886:
strcpy(priv->firmware, ISL3886_IMAGE_FILE);
break;
default:
strcpy(priv->firmware, ISL3890_IMAGE_FILE);
break;
}
if (register_netdev(ndev)) {
DEBUG(SHOW_ERROR_MESSAGES,
"ERROR: register_netdev() failed\n");
goto do_islpci_free_memory;
}
return ndev;
do_islpci_free_memory:
islpci_free_memory(priv);
do_free_netdev:
free_netdev(ndev);
priv = NULL;
return NULL;
}
islpci_state_t
islpci_set_state(islpci_private *priv, islpci_state_t new_state)
{
islpci_state_t old_state;
/* lock */
old_state = priv->state;
/* this means either a race condition or some serious error in
* the driver code */
switch (new_state) {
case PRV_STATE_OFF:
priv->state_off++;
default:
priv->state = new_state;
break;
case PRV_STATE_PREBOOT:
/* there are actually many off-states, enumerated by
* state_off */
if (old_state == PRV_STATE_OFF)
priv->state_off--;
/* only if hw_unavailable is zero now it means we either
* were in off#1 state, or came here from
* somewhere else */
if (!priv->state_off)
priv->state = new_state;
break;
}
#if 0
printk(KERN_DEBUG "%s: state transition %d -> %d (off#%d)\n",
priv->ndev->name, old_state, new_state, priv->state_off);
#endif
/* invariants */
BUG_ON(priv->state_off < 0);
BUG_ON(priv->state_off && (priv->state != PRV_STATE_OFF));
BUG_ON(!priv->state_off && (priv->state == PRV_STATE_OFF));
/* unlock */
return old_state;
}
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