1/* 2 * IXP4XX EHCI Host Controller Driver 3 * 4 * Author: Vladimir Barinov <vbarinov@embeddedalley.com> 5 * 6 * Based on "ehci-fsl.c" by Randy Vinson <rvinson@mvista.com> 7 * 8 * 2007 (c) MontaVista Software, Inc. This file is licensed under 9 * the terms of the GNU General Public License version 2. This program 10 * is licensed "as is" without any warranty of any kind, whether express 11 * or implied. 12 */ 13 14#include <linux/platform_device.h> 15 16static int ixp4xx_ehci_init(struct usb_hcd *hcd) 17{ 18 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 19 int retval = 0; 20 21 ehci->big_endian_desc = 1; 22 ehci->big_endian_mmio = 1; 23 24 ehci->caps = hcd->regs + 0x100; 25 ehci->regs = hcd->regs + 0x100 26 + HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); 27 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); 28 29 hcd->has_tt = 1; 30 ehci_reset(ehci); 31 32 retval = ehci_init(hcd); 33 if (retval) 34 return retval; 35 36 ehci_port_power(ehci, 0); 37 38 return retval; 39} 40 41static const struct hc_driver ixp4xx_ehci_hc_driver = { 42 .description = hcd_name, 43 .product_desc = "IXP4XX EHCI Host Controller", 44 .hcd_priv_size = sizeof(struct ehci_hcd), 45 .irq = ehci_irq, 46 .flags = HCD_MEMORY | HCD_USB2, 47 .reset = ixp4xx_ehci_init, 48 .start = ehci_run, 49 .stop = ehci_stop, 50 .shutdown = ehci_shutdown, 51 .urb_enqueue = ehci_urb_enqueue, 52 .urb_dequeue = ehci_urb_dequeue, 53 .endpoint_disable = ehci_endpoint_disable, 54 .endpoint_reset = ehci_endpoint_reset, 55 .get_frame_number = ehci_get_frame, 56 .hub_status_data = ehci_hub_status_data, 57 .hub_control = ehci_hub_control, 58#if defined(CONFIG_PM) 59 .bus_suspend = ehci_bus_suspend, 60 .bus_resume = ehci_bus_resume, 61#endif 62 .relinquish_port = ehci_relinquish_port, 63 .port_handed_over = ehci_port_handed_over, 64 65 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, 66}; 67 68static int ixp4xx_ehci_probe(struct platform_device *pdev) 69{ 70 struct usb_hcd *hcd; 71 const struct hc_driver *driver = &ixp4xx_ehci_hc_driver; 72 struct resource *res; 73 int irq; 74 int retval; 75 76 if (usb_disabled()) 77 return -ENODEV; 78 79 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 80 if (!res) { 81 dev_err(&pdev->dev, 82 "Found HC with no IRQ. Check %s setup!\n", 83 dev_name(&pdev->dev)); 84 return -ENODEV; 85 } 86 irq = res->start; 87 88 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); 89 if (!hcd) { 90 retval = -ENOMEM; 91 goto fail_create_hcd; 92 } 93 94 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 95 if (!res) { 96 dev_err(&pdev->dev, 97 "Found HC with no register addr. Check %s setup!\n", 98 dev_name(&pdev->dev)); 99 retval = -ENODEV; 100 goto fail_request_resource; 101 } 102 hcd->rsrc_start = res->start; 103 hcd->rsrc_len = res->end - res->start + 1; 104 105 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, 106 driver->description)) { 107 dev_dbg(&pdev->dev, "controller already in use\n"); 108 retval = -EBUSY; 109 goto fail_request_resource; 110 } 111 112 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len); 113 if (hcd->regs == NULL) { 114 dev_dbg(&pdev->dev, "error mapping memory\n"); 115 retval = -EFAULT; 116 goto fail_ioremap; 117 } 118 119 retval = usb_add_hcd(hcd, irq, IRQF_SHARED); 120 if (retval) 121 goto fail_add_hcd; 122 123 return retval; 124 125fail_add_hcd: 126 iounmap(hcd->regs); 127fail_ioremap: 128 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 129fail_request_resource: 130 usb_put_hcd(hcd); 131fail_create_hcd: 132 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval); 133 return retval; 134} 135 136static int ixp4xx_ehci_remove(struct platform_device *pdev) 137{ 138 struct usb_hcd *hcd = platform_get_drvdata(pdev); 139 140 usb_remove_hcd(hcd); 141 iounmap(hcd->regs); 142 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 143 usb_put_hcd(hcd); 144 145 return 0; 146} 147 148MODULE_ALIAS("platform:ixp4xx-ehci"); 149 150static struct platform_driver ixp4xx_ehci_driver = { 151 .probe = ixp4xx_ehci_probe, 152 .remove = ixp4xx_ehci_remove, 153 .driver = { 154 .name = "ixp4xx-ehci", 155 }, 156}; 157