| 1 | /* |
| 2 | * MCS814X EHCI Host Controller Driver |
| 3 | * |
| 4 | * Based on "ehci-fsl.c" by Randy Vinson <rvinson@mvista.com> |
| 5 | * |
| 6 | * 2007 (c) MontaVista Software, Inc. This file is licensed under |
| 7 | * the terms of the GNU General Public License version 2. This program |
| 8 | * is licensed "as is" without any warranty of any kind, whether express |
| 9 | * or implied. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/platform_device.h> |
| 13 | #include <linux/of.h> |
| 14 | |
| 15 | #define MCS814X_EHCI_CAPS_OFFSET 0x68 |
| 16 | |
| 17 | static int mcs814x_ehci_init(struct usb_hcd *hcd) |
| 18 | { |
| 19 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
| 20 | int retval = 0; |
| 21 | |
| 22 | ehci->caps = hcd->regs + MCS814X_EHCI_CAPS_OFFSET; |
| 23 | ehci->regs = hcd->regs |
| 24 | + HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); |
| 25 | ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); |
| 26 | ehci_reset(ehci); |
| 27 | |
| 28 | retval = ehci_init(hcd); |
| 29 | if (retval) { |
| 30 | pr_err("ehci_init failed\n"); |
| 31 | return retval; |
| 32 | } |
| 33 | |
| 34 | ehci_port_power(ehci, 0); |
| 35 | |
| 36 | return retval; |
| 37 | } |
| 38 | |
| 39 | static const struct hc_driver mcs814x_ehci_hc_driver = { |
| 40 | .description = hcd_name, |
| 41 | .product_desc = "MCS814X EHCI Host Controller", |
| 42 | .hcd_priv_size = sizeof(struct ehci_hcd), |
| 43 | .irq = ehci_irq, |
| 44 | .flags = HCD_MEMORY | HCD_USB2, |
| 45 | .reset = mcs814x_ehci_init, |
| 46 | .start = ehci_run, |
| 47 | .stop = ehci_stop, |
| 48 | .shutdown = ehci_shutdown, |
| 49 | .urb_enqueue = ehci_urb_enqueue, |
| 50 | .urb_dequeue = ehci_urb_dequeue, |
| 51 | .endpoint_disable = ehci_endpoint_disable, |
| 52 | .get_frame_number = ehci_get_frame, |
| 53 | .hub_status_data = ehci_hub_status_data, |
| 54 | .hub_control = ehci_hub_control, |
| 55 | #if defined(CONFIG_PM) |
| 56 | .bus_suspend = ehci_bus_suspend, |
| 57 | .bus_resume = ehci_bus_resume, |
| 58 | #endif |
| 59 | .relinquish_port = ehci_relinquish_port, |
| 60 | .port_handed_over = ehci_port_handed_over, |
| 61 | |
| 62 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
| 63 | }; |
| 64 | |
| 65 | static int mcs814x_ehci_probe(struct platform_device *pdev) |
| 66 | { |
| 67 | struct usb_hcd *hcd; |
| 68 | const struct hc_driver *driver = &mcs814x_ehci_hc_driver; |
| 69 | struct resource *res; |
| 70 | int irq; |
| 71 | int retval; |
| 72 | |
| 73 | if (usb_disabled()) |
| 74 | return -ENODEV; |
| 75 | |
| 76 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| 77 | if (!res) { |
| 78 | dev_err(&pdev->dev, |
| 79 | "Found HC with no IRQ. Check %s setup!\n", |
| 80 | dev_name(&pdev->dev)); |
| 81 | return -ENODEV; |
| 82 | } |
| 83 | irq = res->start; |
| 84 | |
| 85 | pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); |
| 86 | pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; |
| 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 = resource_size(res); |
| 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 | dev_info(&pdev->dev, "added MCS814X EHCI driver\n"); |
| 124 | |
| 125 | return retval; |
| 126 | |
| 127 | fail_add_hcd: |
| 128 | iounmap(hcd->regs); |
| 129 | fail_ioremap: |
| 130 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 131 | fail_request_resource: |
| 132 | usb_put_hcd(hcd); |
| 133 | fail_create_hcd: |
| 134 | dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval); |
| 135 | return retval; |
| 136 | } |
| 137 | |
| 138 | static int mcs814x_ehci_remove(struct platform_device *pdev) |
| 139 | { |
| 140 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| 141 | |
| 142 | usb_remove_hcd(hcd); |
| 143 | iounmap(hcd->regs); |
| 144 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 145 | usb_put_hcd(hcd); |
| 146 | |
| 147 | return 0; |
| 148 | } |
| 149 | |
| 150 | MODULE_ALIAS("platform:mcs814x-ehci"); |
| 151 | |
| 152 | static const struct of_device_id mcs814x_ehci_id[] = { |
| 153 | { .compatible = "moschip,mcs814x-ehci" }, |
| 154 | { .compatible = "usb-ehci" }, |
| 155 | { /* sentinel */ }, |
| 156 | }; |
| 157 | |
| 158 | static struct platform_driver mcs814x_ehci_driver = { |
| 159 | .probe = mcs814x_ehci_probe, |
| 160 | .remove = mcs814x_ehci_remove, |
| 161 | .driver = { |
| 162 | .name = "mcs814x-ehci", |
| 163 | .of_match_table = mcs814x_ehci_id, |
| 164 | }, |
| 165 | }; |
| 166 | |
