| Kelvin Cheung | f30cdbc | 2012-01-18 14:41:16 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Bus Glue for Loongson LS1X built-in EHCI controller. |
| 3 | * |
| 4 | * Copyright (c) 2012 Zhang, Keguang <keguang.zhang@gmail.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 as published |
| 8 | * by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | |
| 12 | #include <linux/platform_device.h> |
| 13 | |
| 14 | static int ehci_ls1x_reset(struct usb_hcd *hcd) |
| 15 | { |
| 16 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 17 | int ret; |
| 18 | |
| 19 | ehci->caps = hcd->regs; |
| 20 | |
| 21 | ret = ehci_setup(hcd); |
| 22 | if (ret) |
| 23 | return ret; |
| 24 | |
| 25 | ehci_port_power(ehci, 0); |
| 26 | |
| 27 | return 0; |
| 28 | } |
| 29 | |
| 30 | static const struct hc_driver ehci_ls1x_hc_driver = { |
| 31 | .description = hcd_name, |
| 32 | .product_desc = "LOONGSON1 EHCI", |
| 33 | .hcd_priv_size = sizeof(struct ehci_hcd), |
| 34 | |
| 35 | /* |
| 36 | * generic hardware linkage |
| 37 | */ |
| 38 | .irq = ehci_irq, |
| 39 | .flags = HCD_MEMORY | HCD_USB2, |
| 40 | |
| 41 | /* |
| 42 | * basic lifecycle operations |
| 43 | */ |
| 44 | .reset = ehci_ls1x_reset, |
| 45 | .start = ehci_run, |
| 46 | .stop = ehci_stop, |
| 47 | .shutdown = ehci_shutdown, |
| 48 | |
| 49 | /* |
| 50 | * managing i/o requests and associated device resources |
| 51 | */ |
| 52 | .urb_enqueue = ehci_urb_enqueue, |
| 53 | .urb_dequeue = ehci_urb_dequeue, |
| 54 | .endpoint_disable = ehci_endpoint_disable, |
| 55 | .endpoint_reset = ehci_endpoint_reset, |
| 56 | |
| 57 | /* |
| 58 | * scheduling support |
| 59 | */ |
| 60 | .get_frame_number = ehci_get_frame, |
| 61 | |
| 62 | /* |
| 63 | * root hub support |
| 64 | */ |
| 65 | .hub_status_data = ehci_hub_status_data, |
| 66 | .hub_control = ehci_hub_control, |
| 67 | .relinquish_port = ehci_relinquish_port, |
| 68 | .port_handed_over = ehci_port_handed_over, |
| 69 | |
| 70 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
| 71 | }; |
| 72 | |
| 73 | static int ehci_hcd_ls1x_probe(struct platform_device *pdev) |
| 74 | { |
| 75 | struct usb_hcd *hcd; |
| 76 | struct resource *res; |
| 77 | int irq; |
| 78 | int ret; |
| 79 | |
| 80 | pr_debug("initializing loongson1 ehci USB Controller\n"); |
| 81 | |
| 82 | if (usb_disabled()) |
| 83 | return -ENODEV; |
| 84 | |
| 85 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| 86 | if (!res) { |
| 87 | dev_err(&pdev->dev, |
| 88 | "Found HC with no IRQ. Check %s setup!\n", |
| 89 | dev_name(&pdev->dev)); |
| 90 | return -ENODEV; |
| 91 | } |
| 92 | irq = res->start; |
| 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 | return -ENODEV; |
| 100 | } |
| 101 | |
| 102 | hcd = usb_create_hcd(&ehci_ls1x_hc_driver, &pdev->dev, |
| 103 | dev_name(&pdev->dev)); |
| 104 | if (!hcd) |
| 105 | return -ENOMEM; |
| 106 | hcd->rsrc_start = res->start; |
| 107 | hcd->rsrc_len = resource_size(res); |
| 108 | |
| 109 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { |
| 110 | dev_dbg(&pdev->dev, "controller already in use\n"); |
| 111 | ret = -EBUSY; |
| 112 | goto err_put_hcd; |
| 113 | } |
| 114 | |
| 115 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); |
| 116 | if (hcd->regs == NULL) { |
| 117 | dev_dbg(&pdev->dev, "error mapping memory\n"); |
| 118 | ret = -EFAULT; |
| 119 | goto err_release_region; |
| 120 | } |
| 121 | |
| 122 | ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED); |
| 123 | if (ret) |
| 124 | goto err_iounmap; |
| 125 | |
| 126 | return ret; |
| 127 | |
| 128 | err_iounmap: |
| 129 | iounmap(hcd->regs); |
| 130 | err_release_region: |
| 131 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 132 | err_put_hcd: |
| 133 | usb_put_hcd(hcd); |
| 134 | return ret; |
| 135 | } |
| 136 | |
| 137 | static int ehci_hcd_ls1x_remove(struct platform_device *pdev) |
| 138 | { |
| 139 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| 140 | |
| 141 | usb_remove_hcd(hcd); |
| 142 | iounmap(hcd->regs); |
| 143 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 144 | usb_put_hcd(hcd); |
| 145 | |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | static struct platform_driver ehci_ls1x_driver = { |
| 150 | .probe = ehci_hcd_ls1x_probe, |
| 151 | .remove = ehci_hcd_ls1x_remove, |
| 152 | .shutdown = usb_hcd_platform_shutdown, |
| 153 | .driver = { |
| 154 | .name = "ls1x-ehci", |
| 155 | .owner = THIS_MODULE, |
| 156 | }, |
| 157 | }; |
| 158 | |
| 159 | MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ls1x-ehci"); |