projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 23106343 J |
1 | /* |
| 2 | * EHCI HCD for Netlogic XLS processors. | |
| 3 | * | |
| 4 | * (C) Copyright 2011 Netlogic Microsystems Inc. | |
| 5 | * | |
| 6 | * Based on various ehci-*.c 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 | ||
| 15 | static int ehci_xls_setup(struct usb_hcd *hcd) | |
| 16 | { | |
| 17 | int retval; | |
| 18 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
| 19 | ||
| 20 | ehci->caps = hcd->regs; | |
| 21 | ehci->regs = hcd->regs + | |
| 22 | HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); | |
| 23 | dbg_hcs_params(ehci, "reset"); | |
| 24 | dbg_hcc_params(ehci, "reset"); | |
| 25 | ||
| 26 | /* cache this readonly data; minimize chip reads */ | |
| 27 | ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); | |
| 28 | ||
| 29 | retval = ehci_halt(ehci); | |
| 30 | if (retval) | |
| 31 | return retval; | |
| 32 | ||
| 33 | /* data structure init */ | |
| 34 | retval = ehci_init(hcd); | |
| 35 | if (retval) | |
| 36 | return retval; | |
| 37 | ||
| 38 | ehci_reset(ehci); | |
| 39 | ||
| 40 | return retval; | |
| 41 | } | |
| 42 | ||
| 43 | int ehci_xls_probe_internal(const struct hc_driver *driver, | |
| 44 | struct platform_device *pdev) | |
| 45 | { | |
| 46 | struct usb_hcd *hcd; | |
| 47 | struct resource *res; | |
| 48 | int retval, irq; | |
| 49 | ||
| 50 | /* Get our IRQ from an earlier registered Platform Resource */ | |
| 51 | irq = platform_get_irq(pdev, 0); | |
| 52 | if (irq < 0) { | |
| 53 | dev_err(&pdev->dev, "Found HC with no IRQ. Check %s setup!\n", | |
| 54 | dev_name(&pdev->dev)); | |
| 55 | return -ENODEV; | |
| 56 | } | |
| 57 | ||
| 58 | /* Get our Memory Handle */ | |
| 59 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
| 60 | if (!res) { | |
| 61 | dev_err(&pdev->dev, "Error: MMIO Handle %s setup!\n", | |
| 62 | dev_name(&pdev->dev)); | |
| 63 | return -ENODEV; | |
| 64 | } | |
| 65 | hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); | |
| 66 | if (!hcd) { | |
| 67 | retval = -ENOMEM; | |
| 68 | goto err1; | |
| 69 | } | |
| 70 | ||
| 71 | hcd->rsrc_start = res->start; | |
| 72 | hcd->rsrc_len = res->end - res->start + 1; | |
| 73 | ||
| 74 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, | |
| 75 | driver->description)) { | |
| 76 | dev_dbg(&pdev->dev, "controller already in use\n"); | |
| 77 | retval = -EBUSY; | |
| 78 | goto err2; | |
| 79 | } | |
| 80 | hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len); | |
| 81 | ||
| 82 | if (hcd->regs == NULL) { | |
| 83 | dev_dbg(&pdev->dev, "error mapping memory\n"); | |
| 84 | retval = -EFAULT; | |
| 85 | goto err3; | |
| 86 | } | |
| 87 | ||
| 88 | retval = usb_add_hcd(hcd, irq, IRQF_SHARED); | |
| 89 | if (retval != 0) | |
| 90 | goto err4; | |
| 91 | return retval; | |
| 92 | ||
| 93 | err4: | |
| 94 | iounmap(hcd->regs); | |
| 95 | err3: | |
| 96 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
| 97 | err2: | |
| 98 | usb_put_hcd(hcd); | |
| 99 | err1: | |
| 100 | dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), | |
| 101 | retval); | |
| 102 | return retval; | |
| 103 | } | |
| 104 | ||
| 105 | static struct hc_driver ehci_xls_hc_driver = { | |
| 106 | .description = hcd_name, | |
| 107 | .product_desc = "XLS EHCI Host Controller", | |
| 108 | .hcd_priv_size = sizeof(struct ehci_hcd), | |
| 109 | .irq = ehci_irq, | |
| 110 | .flags = HCD_USB2 | HCD_MEMORY, | |
| 111 | .reset = ehci_xls_setup, | |
| 112 | .start = ehci_run, | |
| 113 | .stop = ehci_stop, | |
| 114 | .shutdown = ehci_shutdown, | |
| 115 | ||
| 116 | .urb_enqueue = ehci_urb_enqueue, | |
| 117 | .urb_dequeue = ehci_urb_dequeue, | |
| 118 | .endpoint_disable = ehci_endpoint_disable, | |
| 119 | .endpoint_reset = ehci_endpoint_reset, | |
| 120 | ||
| 121 | .get_frame_number = ehci_get_frame, | |
| 122 | ||
| 123 | .hub_status_data = ehci_hub_status_data, | |
| 124 | .hub_control = ehci_hub_control, | |
| 125 | .bus_suspend = ehci_bus_suspend, | |
| 126 | .bus_resume = ehci_bus_resume, | |
| 127 | .relinquish_port = ehci_relinquish_port, | |
| 128 | .port_handed_over = ehci_port_handed_over, | |
| 129 | ||
| 130 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, | |
| 131 | }; | |
| 132 | ||
| 133 | static int ehci_xls_probe(struct platform_device *pdev) | |
| 134 | { | |
| 135 | if (usb_disabled()) | |
| 136 | return -ENODEV; | |
| 137 | ||
| 138 | return ehci_xls_probe_internal(&ehci_xls_hc_driver, pdev); | |
| 139 | } | |
| 140 | ||
| 141 | static int ehci_xls_remove(struct platform_device *pdev) | |
| 142 | { | |
| 143 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
| 144 | ||
| 145 | usb_remove_hcd(hcd); | |
| 146 | iounmap(hcd->regs); | |
| 147 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
| 148 | usb_put_hcd(hcd); | |
| 149 | return 0; | |
| 150 | } | |
| 151 | ||
| 152 | MODULE_ALIAS("ehci-xls"); | |
| 153 | ||
| 154 | static struct platform_driver ehci_xls_driver = { | |
| 155 | .probe = ehci_xls_probe, | |
| 156 | .remove = ehci_xls_remove, | |
| 157 | .shutdown = usb_hcd_platform_shutdown, | |
| 158 | .driver = { | |
| 159 | .name = "ehci-xls", | |
| 160 | }, | |
| 161 | }; |