| Jayachandran C | 2310634 | 2011-08-05 01:28:22 +0530 | [diff] [blame] | 1 | /* |
| 2 | * OHCI HCD for Netlogic XLS processors. |
| 3 | * |
| 4 | * (C) Copyright 2011 Netlogic Microsystems Inc. |
| 5 | * |
| 6 | * Based on ohci-au1xxx.c, and other Linux OHCI drivers. |
| 7 | * |
| 8 | * This file is subject to the terms and conditions of the GNU General Public |
| 9 | * License. See the file COPYING in the main directory of this archive for |
| 10 | * more details. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/platform_device.h> |
| 14 | #include <linux/signal.h> |
| 15 | |
| 16 | static int ohci_xls_probe_internal(const struct hc_driver *driver, |
| 17 | struct platform_device *dev) |
| 18 | { |
| 19 | struct resource *res; |
| 20 | struct usb_hcd *hcd; |
| 21 | int retval, irq; |
| 22 | |
| 23 | /* Get our IRQ from an earlier registered Platform Resource */ |
| 24 | irq = platform_get_irq(dev, 0); |
| 25 | if (irq < 0) { |
| 26 | dev_err(&dev->dev, "Found HC with no IRQ\n"); |
| 27 | return -ENODEV; |
| 28 | } |
| 29 | |
| 30 | /* Get our Memory Handle */ |
| 31 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
| 32 | if (!res) { |
| 33 | dev_err(&dev->dev, "MMIO Handle incorrect!\n"); |
| 34 | return -ENODEV; |
| 35 | } |
| 36 | |
| 37 | hcd = usb_create_hcd(driver, &dev->dev, "XLS"); |
| 38 | if (!hcd) { |
| 39 | retval = -ENOMEM; |
| 40 | goto err1; |
| 41 | } |
| 42 | hcd->rsrc_start = res->start; |
| 43 | hcd->rsrc_len = res->end - res->start + 1; |
| 44 | |
| 45 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, |
| 46 | driver->description)) { |
| 47 | dev_dbg(&dev->dev, "Controller already in use\n"); |
| 48 | retval = -EBUSY; |
| 49 | goto err2; |
| 50 | } |
| 51 | |
| 52 | hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len); |
| 53 | if (hcd->regs == NULL) { |
| 54 | dev_dbg(&dev->dev, "error mapping memory\n"); |
| 55 | retval = -EFAULT; |
| 56 | goto err3; |
| 57 | } |
| 58 | |
| 59 | retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED); |
| 60 | if (retval != 0) |
| 61 | goto err4; |
| 62 | return retval; |
| 63 | |
| 64 | err4: |
| 65 | iounmap(hcd->regs); |
| 66 | err3: |
| 67 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 68 | err2: |
| 69 | usb_put_hcd(hcd); |
| 70 | err1: |
| 71 | dev_err(&dev->dev, "init fail, %d\n", retval); |
| 72 | return retval; |
| 73 | } |
| 74 | |
| 75 | static int ohci_xls_reset(struct usb_hcd *hcd) |
| 76 | { |
| 77 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
| 78 | |
| 79 | ohci_hcd_init(ohci); |
| 80 | return ohci_init(ohci); |
| 81 | } |
| 82 | |
| 83 | static int __devinit ohci_xls_start(struct usb_hcd *hcd) |
| 84 | { |
| 85 | struct ohci_hcd *ohci; |
| 86 | int ret; |
| 87 | |
| 88 | ohci = hcd_to_ohci(hcd); |
| 89 | ret = ohci_run(ohci); |
| 90 | if (ret < 0) { |
| 91 | err("can't start %s", hcd->self.bus_name); |
| 92 | ohci_stop(hcd); |
| 93 | return ret; |
| 94 | } |
| 95 | return 0; |
| 96 | } |
| 97 | |
| 98 | static struct hc_driver ohci_xls_hc_driver = { |
| 99 | .description = hcd_name, |
| 100 | .product_desc = "XLS OHCI Host Controller", |
| 101 | .hcd_priv_size = sizeof(struct ohci_hcd), |
| 102 | .irq = ohci_irq, |
| 103 | .flags = HCD_MEMORY | HCD_USB11, |
| 104 | .reset = ohci_xls_reset, |
| 105 | .start = ohci_xls_start, |
| 106 | .stop = ohci_stop, |
| 107 | .shutdown = ohci_shutdown, |
| 108 | .urb_enqueue = ohci_urb_enqueue, |
| 109 | .urb_dequeue = ohci_urb_dequeue, |
| 110 | .endpoint_disable = ohci_endpoint_disable, |
| 111 | .get_frame_number = ohci_get_frame, |
| 112 | .hub_status_data = ohci_hub_status_data, |
| 113 | .hub_control = ohci_hub_control, |
| 114 | #ifdef CONFIG_PM |
| 115 | .bus_suspend = ohci_bus_suspend, |
| 116 | .bus_resume = ohci_bus_resume, |
| 117 | #endif |
| 118 | .start_port_reset = ohci_start_port_reset, |
| 119 | }; |
| 120 | |
| 121 | static int ohci_xls_probe(struct platform_device *dev) |
| 122 | { |
| 123 | int ret; |
| 124 | |
| 125 | pr_debug("In ohci_xls_probe"); |
| 126 | if (usb_disabled()) |
| 127 | return -ENODEV; |
| 128 | ret = ohci_xls_probe_internal(&ohci_xls_hc_driver, dev); |
| 129 | return ret; |
| 130 | } |
| 131 | |
| 132 | static int ohci_xls_remove(struct platform_device *dev) |
| 133 | { |
| 134 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
| 135 | |
| 136 | usb_remove_hcd(hcd); |
| 137 | iounmap(hcd->regs); |
| 138 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 139 | usb_put_hcd(hcd); |
| 140 | return 0; |
| 141 | } |
| 142 | |
| 143 | static struct platform_driver ohci_xls_driver = { |
| 144 | .probe = ohci_xls_probe, |
| 145 | .remove = ohci_xls_remove, |
| 146 | .shutdown = usb_hcd_platform_shutdown, |
| 147 | .driver = { |
| 148 | .name = "ohci-xls-0", |
| 149 | .owner = THIS_MODULE, |
| 150 | }, |
| 151 | }; |