| /* |
| * Glue code for the ISP1760 driver and bus |
| * Currently there is support for |
| * - OpenFirmware |
| * - PCI |
| * |
| * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de> |
| * |
| */ |
| |
| #include <linux/usb.h> |
| #include <linux/io.h> |
| |
| #include "../core/hcd.h" |
| #include "isp1760-hcd.h" |
| |
| #ifdef CONFIG_PPC_OF |
| #include <linux/of.h> |
| #include <linux/of_platform.h> |
| #endif |
| |
| #ifdef CONFIG_PCI |
| #include <linux/pci.h> |
| #endif |
| |
| #ifdef CONFIG_PPC_OF |
| static int of_isp1760_probe(struct of_device *dev, |
| const struct of_device_id *match) |
| { |
| struct usb_hcd *hcd; |
| struct device_node *dp = dev->node; |
| struct resource *res; |
| struct resource memory; |
| struct of_irq oirq; |
| int virq; |
| u64 res_len; |
| int ret; |
| const unsigned int *prop; |
| unsigned int devflags = 0; |
| |
| ret = of_address_to_resource(dp, 0, &memory); |
| if (ret) |
| return -ENXIO; |
| |
| res = request_mem_region(memory.start, memory.end - memory.start + 1, |
| dev_name(&dev->dev)); |
| if (!res) |
| return -EBUSY; |
| |
| res_len = memory.end - memory.start + 1; |
| |
| if (of_irq_map_one(dp, 0, &oirq)) { |
| ret = -ENODEV; |
| goto release_reg; |
| } |
| |
| virq = irq_create_of_mapping(oirq.controller, oirq.specifier, |
| oirq.size); |
| |
| if (of_device_is_compatible(dp, "nxp,usb-isp1761")) |
| devflags |= ISP1760_FLAG_ISP1761; |
| |
| if (of_get_property(dp, "port1-disable", NULL) != NULL) |
| devflags |= ISP1760_FLAG_PORT1_DIS; |
| |
| /* Some systems wire up only 16 of the 32 data lines */ |
| prop = of_get_property(dp, "bus-width", NULL); |
| if (prop && *prop == 16) |
| devflags |= ISP1760_FLAG_BUS_WIDTH_16; |
| |
| if (of_get_property(dp, "port1-otg", NULL) != NULL) |
| devflags |= ISP1760_FLAG_OTG_EN; |
| |
| if (of_get_property(dp, "analog-oc", NULL) != NULL) |
| devflags |= ISP1760_FLAG_ANALOG_OC; |
| |
| if (of_get_property(dp, "dack-polarity", NULL) != NULL) |
| devflags |= ISP1760_FLAG_DACK_POL_HIGH; |
| |
| if (of_get_property(dp, "dreq-polarity", NULL) != NULL) |
| devflags |= ISP1760_FLAG_DREQ_POL_HIGH; |
| |
| hcd = isp1760_register(memory.start, res_len, virq, |
| IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev_name(&dev->dev), |
| devflags); |
| if (IS_ERR(hcd)) { |
| ret = PTR_ERR(hcd); |
| goto release_reg; |
| } |
| |
| dev_set_drvdata(&dev->dev, hcd); |
| return ret; |
| |
| release_reg: |
| release_mem_region(memory.start, memory.end - memory.start + 1); |
| return ret; |
| } |
| |
| static int of_isp1760_remove(struct of_device *dev) |
| { |
| struct usb_hcd *hcd = dev_get_drvdata(&dev->dev); |
| |
| dev_set_drvdata(&dev->dev, NULL); |
| |
| usb_remove_hcd(hcd); |
| iounmap(hcd->regs); |
| release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| usb_put_hcd(hcd); |
| return 0; |
| } |
| |
| static struct of_device_id of_isp1760_match[] = { |
| { |
| .compatible = "nxp,usb-isp1760", |
| }, |
| { |
| .compatible = "nxp,usb-isp1761", |
| }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(of, of_isp1760_match); |
| |
| static struct of_platform_driver isp1760_of_driver = { |
| .name = "nxp-isp1760", |
| .match_table = of_isp1760_match, |
| .probe = of_isp1760_probe, |
| .remove = of_isp1760_remove, |
| }; |
| #endif |
| |
| #ifdef CONFIG_PCI |
| static u32 nxp_pci_io_base; |
| static u32 iolength; |
| static u32 pci_mem_phy0; |
| static u32 length; |
| static u8 __iomem *chip_addr; |
| static u8 __iomem *iobase; |
| |
| static int __devinit isp1761_pci_probe(struct pci_dev *dev, |
| const struct pci_device_id *id) |
| { |
| u8 latency, limit; |
| __u32 reg_data; |
| int retry_count; |
| int length; |
| int status = 1; |
| struct usb_hcd *hcd; |
| unsigned int devflags = 0; |
| |
| 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"); |
| release_mem_region(nxp_pci_io_base, iolength); |
| return -ENOMEM; |
| } |
| /* Grab the PLX PCI shared memory of the ISP 1761 we need */ |
| pci_mem_phy0 = pci_resource_start(dev, 3); |
| length = pci_resource_len(dev, 3); |
| |
| if (length < 0xffff) { |
| printk(KERN_ERR "memory length for this resource is less than " |
| "required\n"); |
| release_mem_region(nxp_pci_io_base, iolength); |
| iounmap(iobase); |
| return -ENOMEM; |
| } |
| |
| if (!request_mem_region(pci_mem_phy0, length, "ISP-PCI")) { |
| printk(KERN_ERR "host controller already in use\n"); |
| release_mem_region(nxp_pci_io_base, iolength); |
| iounmap(iobase); |
| return -EBUSY; |
| } |
| |
| /* bad pci latencies can contribute to overruns */ |
| pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency); |
| if (latency) { |
| pci_read_config_byte(dev, PCI_MAX_LAT, &limit); |
| if (limit && limit < latency) |
| pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit); |
| } |
| |
| /* Try to check whether we can access Scratch Register of |
| * Host Controller or not. The initial PCI access is retried until |
| * local init for the PCI bridge is completed |
| */ |
| retry_count = 20; |
| reg_data = 0; |
| while ((reg_data != 0xFACE) && retry_count) { |
| /*by default host is in 16bit mode, so |
| * io operations at this stage must be 16 bit |
| * */ |
| writel(0xface, chip_addr + HC_SCRATCH_REG); |
| udelay(100); |
| reg_data = readl(chip_addr + HC_SCRATCH_REG); |
| retry_count--; |
| } |
| |
| /* 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); |
| goto clean; |
| } |
| |
| pci_set_master(dev); |
| |
| status = readl(iobase + 0x68); |
| status |= 0x900; |
| writel(status, iobase + 0x68); |
| |
| dev->dev.dma_mask = NULL; |
| hcd = isp1760_register(pci_mem_phy0, length, dev->irq, |
| IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev_name(&dev->dev), |
| devflags); |
| if (!IS_ERR(hcd)) { |
| pci_set_drvdata(dev, hcd); |
| return 0; |
| } |
| clean: |
| status = -ENODEV; |
| iounmap(iobase); |
| release_mem_region(pci_mem_phy0, length); |
| release_mem_region(nxp_pci_io_base, iolength); |
| return status; |
| } |
| static void isp1761_pci_remove(struct pci_dev *dev) |
| { |
| struct usb_hcd *hcd; |
| |
| hcd = pci_get_drvdata(dev); |
| |
| usb_remove_hcd(hcd); |
| iounmap(hcd->regs); |
| release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| usb_put_hcd(hcd); |
| |
| pci_disable_device(dev); |
| |
| iounmap(iobase); |
| iounmap(chip_addr); |
| |
| release_mem_region(nxp_pci_io_base, iolength); |
| release_mem_region(pci_mem_phy0, length); |
| } |
| |
| static void isp1761_pci_shutdown(struct pci_dev *dev) |
| { |
| printk(KERN_ERR "ips1761_pci_shutdown\n"); |
| } |
| |
| static const struct pci_device_id isp1760_plx [] = { { |
| /* handle any USB 2.0 EHCI controller */ |
| PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_OTHER << 8) | (0x06 << 16)), ~0), |
| .driver_data = 0, |
| }, |
| { /* end: all zeroes */ } |
| }; |
| MODULE_DEVICE_TABLE(pci, isp1760_plx); |
| |
| static struct pci_driver isp1761_pci_driver = { |
| .name = "isp1760", |
| .id_table = isp1760_plx, |
| .probe = isp1761_pci_probe, |
| .remove = isp1761_pci_remove, |
| .shutdown = isp1761_pci_shutdown, |
| }; |
| #endif |
| |
| static int __init isp1760_init(void) |
| { |
| int ret; |
| |
| init_kmem_once(); |
| |
| #ifdef CONFIG_PPC_OF |
| ret = of_register_platform_driver(&isp1760_of_driver); |
| if (ret) { |
| deinit_kmem_cache(); |
| return ret; |
| } |
| #endif |
| #ifdef CONFIG_PCI |
| ret = pci_register_driver(&isp1761_pci_driver); |
| if (ret) |
| goto unreg_of; |
| #endif |
| return ret; |
| |
| #ifdef CONFIG_PCI |
| unreg_of: |
| #endif |
| #ifdef CONFIG_PPC_OF |
| of_unregister_platform_driver(&isp1760_of_driver); |
| #endif |
| deinit_kmem_cache(); |
| return ret; |
| } |
| module_init(isp1760_init); |
| |
| static void __exit isp1760_exit(void) |
| { |
| #ifdef CONFIG_PPC_OF |
| of_unregister_platform_driver(&isp1760_of_driver); |
| #endif |
| #ifdef CONFIG_PCI |
| pci_unregister_driver(&isp1761_pci_driver); |
| #endif |
| deinit_kmem_cache(); |
| } |
| module_exit(isp1760_exit); |