diff options
Diffstat (limited to 'drivers/net/wireless/intersil/prism54/islpci_dev.c')
| -rw-r--r-- | drivers/net/wireless/intersil/prism54/islpci_dev.c | 965 |
1 files changed, 965 insertions, 0 deletions
diff --git a/drivers/net/wireless/intersil/prism54/islpci_dev.c b/drivers/net/wireless/intersil/prism54/islpci_dev.c new file mode 100644 index 000000000000..84a42012aeae --- /dev/null +++ b/drivers/net/wireless/intersil/prism54/islpci_dev.c @@ -0,0 +1,965 @@ +/* + * 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_change_mtu = eth_change_mtu, + .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; +} |