static int prism54_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct net_device *ndev; u8 latency_tmr; u32 mem_addr; islpci_private *priv; int rvalue; /* Enable the pci device */ if (pci_enable_device(pdev)) { printk(KERN_ERR "%s: pci_enable_device() failed.\n", DRV_NAME); return -ENODEV; } /* check whether the latency timer is set correctly */ pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency_tmr); #if VERBOSE > SHOW_ERROR_MESSAGES DEBUG(SHOW_TRACING, "latency timer: %x\n", latency_tmr); #endif if (latency_tmr < PCIDEVICE_LATENCY_TIMER_MIN) { /* set the latency timer */ pci_write_config_byte(pdev, PCI_LATENCY_TIMER, PCIDEVICE_LATENCY_TIMER_VAL); } /* enable PCI DMA */ if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { printk(KERN_ERR "%s: 32-bit PCI DMA not supported", DRV_NAME); goto do_pci_disable_device; } /* 0x40 is the programmable timer to configure the response timeout (TRDY_TIMEOUT) * 0x41 is the programmable timer to configure the retry timeout (RETRY_TIMEOUT) * The RETRY_TIMEOUT is used to set the number of retries that the core, as a * Master, will perform before abandoning a cycle. The default value for * RETRY_TIMEOUT is 0x80, which far exceeds the PCI 2.1 requirement for new * devices. A write of zero to the RETRY_TIMEOUT register disables this * function to allow use with any non-compliant legacy devices that may * execute more retries. * * Writing zero to both these two registers will disable both timeouts and * *can* solve problems caused by devices that are slow to respond. * Make this configurable - MSW */ if ( init_pcitm >= 0 ) { pci_write_config_byte(pdev, 0x40, (u8)init_pcitm); pci_write_config_byte(pdev, 0x41, (u8)init_pcitm); } else { printk(KERN_INFO "PCI TRDY/RETRY unchanged\n"); } /* request the pci device I/O regions */ rvalue = pci_request_regions(pdev, DRV_NAME); if (rvalue) { printk(KERN_ERR "%s: pci_request_regions failure (rc=%d)\n", DRV_NAME, rvalue); goto do_pci_disable_device; } /* check if the memory window is indeed set */ rvalue = pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &mem_addr); if (rvalue || !mem_addr) { printk(KERN_ERR "%s: PCI device memory region not configured; fix your BIOS or CardBus bridge/drivers\n", DRV_NAME); goto do_pci_release_regions; } /* enable PCI bus-mastering */ DEBUG(SHOW_TRACING, "%s: pci_set_master(pdev)\n", DRV_NAME); pci_set_master(pdev); /* enable MWI */ pci_try_set_mwi(pdev); /* setup the network device interface and its structure */ if (!(ndev = islpci_setup(pdev))) { /* error configuring the driver as a network device */ printk(KERN_ERR "%s: could not configure network device\n", DRV_NAME); goto do_pci_clear_mwi; } priv = netdev_priv(ndev); islpci_set_state(priv, PRV_STATE_PREBOOT); /* we are attempting to boot */ /* card is in unknown state yet, might have some interrupts pending */ isl38xx_disable_interrupts(priv->device_base); /* request for the interrupt before uploading the firmware */ rvalue = request_irq(pdev->irq, islpci_interrupt, IRQF_SHARED, ndev->name, priv); if (rvalue) { /* error, could not hook the handler to the irq */ printk(KERN_ERR "%s: could not install IRQ handler\n", ndev->name); goto do_unregister_netdev; } /* firmware upload is triggered in islpci_open */ return 0; do_unregister_netdev: unregister_netdev(ndev); islpci_free_memory(priv); pci_set_drvdata(pdev, NULL); free_netdev(ndev); priv = NULL; do_pci_clear_mwi: pci_clear_mwi(pdev); do_pci_release_regions: pci_release_regions(pdev); do_pci_disable_device: pci_disable_device(pdev); return -EIO; }
static int prism54_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct net_device *ndev; u8 latency_tmr; u32 mem_addr; islpci_private *priv; int rvalue; if (pci_enable_device(pdev)) { printk(KERN_ERR "%s: pci_enable_device() failed.\n", DRV_NAME); return -ENODEV; } pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency_tmr); #if VERBOSE > SHOW_ERROR_MESSAGES DEBUG(SHOW_TRACING, "latency timer: %x\n", latency_tmr); #endif if (latency_tmr < PCIDEVICE_LATENCY_TIMER_MIN) { pci_write_config_byte(pdev, PCI_LATENCY_TIMER, PCIDEVICE_LATENCY_TIMER_VAL); } if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { printk(KERN_ERR "%s: 32-bit PCI DMA not supported", DRV_NAME); goto do_pci_disable_device; } if ( init_pcitm >= 0 ) { pci_write_config_byte(pdev, 0x40, (u8)init_pcitm); pci_write_config_byte(pdev, 0x41, (u8)init_pcitm); } else { printk(KERN_INFO "PCI TRDY/RETRY unchanged\n"); } rvalue = pci_request_regions(pdev, DRV_NAME); if (rvalue) { printk(KERN_ERR "%s: pci_request_regions failure (rc=%d)\n", DRV_NAME, rvalue); goto do_pci_disable_device; } rvalue = pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &mem_addr); if (rvalue || !mem_addr) { printk(KERN_ERR "%s: PCI device memory region not configured; fix your BIOS or CardBus bridge/drivers\n", DRV_NAME); goto do_pci_release_regions; } DEBUG(SHOW_TRACING, "%s: pci_set_master(pdev)\n", DRV_NAME); pci_set_master(pdev); pci_try_set_mwi(pdev); if (!(ndev = islpci_setup(pdev))) { printk(KERN_ERR "%s: could not configure network device\n", DRV_NAME); goto do_pci_clear_mwi; } priv = netdev_priv(ndev); islpci_set_state(priv, PRV_STATE_PREBOOT); isl38xx_disable_interrupts(priv->device_base); rvalue = request_irq(pdev->irq, &islpci_interrupt, IRQF_SHARED, ndev->name, priv); if (rvalue) { printk(KERN_ERR "%s: could not install IRQ handler\n", ndev->name); goto do_unregister_netdev; } return 0; do_unregister_netdev: unregister_netdev(ndev); islpci_free_memory(priv); pci_set_drvdata(pdev, NULL); free_netdev(ndev); priv = NULL; do_pci_clear_mwi: pci_clear_mwi(pdev); do_pci_release_regions: pci_release_regions(pdev); do_pci_disable_device: pci_disable_device(pdev); return -EIO; }