diff options
| -rw-r--r-- | drivers/usb/host/isp1760-if.c | 134 |
1 files changed, 69 insertions, 65 deletions
diff --git a/drivers/usb/host/isp1760-if.c b/drivers/usb/host/isp1760-if.c index dbb287c..7c03320 100644 --- a/drivers/usb/host/isp1760-if.c +++ b/drivers/usb/host/isp1760-if.c @@ -25,69 +25,34 @@ #endif #ifdef CONFIG_PCI -static int isp1761_pci_probe(struct pci_dev *dev, - const struct pci_device_id *id) +static int isp1761_pci_init(struct pci_dev *dev) { + resource_size_t mem_start; + resource_size_t mem_length; + u8 __iomem *iobase; u8 latency, limit; - __u32 reg_data; int retry_count; - unsigned int devflags = 0; - int ret_status = 0; - - resource_size_t pci_mem_phy0; - resource_size_t memlength; + u32 reg_data; - u8 __iomem *chip_addr; - u8 __iomem *iobase; - resource_size_t nxp_pci_io_base; - resource_size_t iolength; - - if (usb_disabled()) - return -ENODEV; - - if (pci_enable_device(dev) < 0) - return -ENODEV; - - if (!dev->irq) - return -ENODEV; - - /* Grab the PLX PCI mem maped port start address we need */ - nxp_pci_io_base = pci_resource_start(dev, 0); - iolength = pci_resource_len(dev, 0); - - if (!request_mem_region(nxp_pci_io_base, iolength, "ISP1761 IO MEM")) { - printk(KERN_ERR "request region #1\n"); - return -EBUSY; - } - - iobase = ioremap_nocache(nxp_pci_io_base, iolength); - if (!iobase) { - printk(KERN_ERR "ioremap #1\n"); - ret_status = -ENOMEM; - goto cleanup1; - } /* Grab the PLX PCI shared memory of the ISP 1761 we need */ - pci_mem_phy0 = pci_resource_start(dev, 3); - memlength = pci_resource_len(dev, 3); - if (memlength < 0xffff) { + mem_start = pci_resource_start(dev, 3); + mem_length = pci_resource_len(dev, 3); + if (mem_length < 0xffff) { printk(KERN_ERR "memory length for this resource is wrong\n"); - ret_status = -ENOMEM; - goto cleanup2; + return -ENOMEM; } - if (!request_mem_region(pci_mem_phy0, memlength, "ISP-PCI")) { + if (!request_mem_region(mem_start, mem_length, "ISP-PCI")) { printk(KERN_ERR "host controller already in use\n"); - ret_status = -EBUSY; - goto cleanup2; + return -EBUSY; } /* map available memory */ - chip_addr = ioremap_nocache(pci_mem_phy0,memlength); - if (!chip_addr) { + iobase = ioremap_nocache(mem_start, mem_length); + if (!iobase) { printk(KERN_ERR "Error ioremap failed\n"); - release_mem_region(pci_mem_phy0, memlength); - ret_status = -ENOMEM; - goto cleanup2; + release_mem_region(mem_start, mem_length); + return -ENOMEM; } /* bad pci latencies can contribute to overruns */ @@ -108,25 +73,38 @@ static int isp1761_pci_probe(struct pci_dev *dev, /*by default host is in 16bit mode, so * io operations at this stage must be 16 bit * */ - writel(0xface, chip_addr + HC_SCRATCH_REG); + writel(0xface, iobase + HC_SCRATCH_REG); udelay(100); - reg_data = readl(chip_addr + HC_SCRATCH_REG) & 0x0000ffff; + reg_data = readl(iobase + HC_SCRATCH_REG) & 0x0000ffff; retry_count--; } - iounmap(chip_addr); - release_mem_region(pci_mem_phy0, memlength); + iounmap(iobase); + release_mem_region(mem_start, mem_length); /* Host Controller presence is detected by writing to scratch register * and reading back and checking the contents are same or not */ if (reg_data != 0xFACE) { dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data); - ret_status = -ENOMEM; - goto cleanup2; + return -ENOMEM; } - pci_set_master(dev); + /* Grab the PLX PCI mem maped port start address we need */ + mem_start = pci_resource_start(dev, 0); + mem_length = pci_resource_len(dev, 0); + + if (!request_mem_region(mem_start, mem_length, "ISP1761 IO MEM")) { + printk(KERN_ERR "request region #1\n"); + return -EBUSY; + } + + iobase = ioremap_nocache(mem_start, mem_length); + if (!iobase) { + printk(KERN_ERR "ioremap #1\n"); + release_mem_region(mem_start, mem_length); + return -ENOMEM; + } /* configure PLX PCI chip to pass interrupts */ #define PLX_INT_CSR_REG 0x68 @@ -136,17 +114,43 @@ static int isp1761_pci_probe(struct pci_dev *dev, /* done with PLX IO access */ iounmap(iobase); - release_mem_region(nxp_pci_io_base, iolength); + release_mem_region(mem_start, mem_length); + + return 0; +} + +static int isp1761_pci_probe(struct pci_dev *dev, + const struct pci_device_id *id) +{ + unsigned int devflags = 0; + int ret; + + if (usb_disabled()) + return -ENODEV; + + if (!dev->irq) + return -ENODEV; + + if (pci_enable_device(dev) < 0) + return -ENODEV; + + ret = isp1761_pci_init(dev); + if (ret < 0) + goto error; + + pci_set_master(dev); dev->dev.dma_mask = NULL; - return isp1760_register(&dev->resource[3], dev->irq, IRQF_SHARED, - &dev->dev, devflags); + ret = isp1760_register(&dev->resource[3], dev->irq, IRQF_SHARED, + &dev->dev, devflags); + if (ret < 0) + goto error; -cleanup2: - iounmap(iobase); -cleanup1: - release_mem_region(nxp_pci_io_base, iolength); - return ret_status; + return 0; + +error: + pci_disable_device(dev); + return ret; } static void isp1761_pci_remove(struct pci_dev *dev) |