| 1 | /* |
| 2 | * OHCI HCD (Host Controller Driver) for USB. |
| 3 | * |
| 4 | * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> |
| 5 | * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> |
| 6 | * (C) Copyright 2002 Hewlett-Packard Company |
| 7 | * |
| 8 | * Bus Glue for Moschip MCS814x. |
| 9 | * |
| 10 | * Written by Christopher Hoover <ch@hpl.hp.com> |
| 11 | * Based on fragments of previous driver by Russell King et al. |
| 12 | * |
| 13 | * Modified for LH7A404 from ohci-sa1111.c |
| 14 | * by Durgesh Pattamatta <pattamattad@sharpsec.com> |
| 15 | * |
| 16 | * Modified for pxa27x from ohci-lh7a404.c |
| 17 | * by Nick Bane <nick@cecomputing.co.uk> 26-8-2004 |
| 18 | * |
| 19 | * Modified for mcs814x from ohci-mcs814x.c |
| 20 | * by Lennert Buytenhek <buytenh@wantstofly.org> 28-2-2006 |
| 21 | * Based on an earlier driver by Ray Lehtiniemi |
| 22 | * |
| 23 | * This file is licenced under the GPL. |
| 24 | */ |
| 25 | |
| 26 | #include <linux/device.h> |
| 27 | #include <linux/signal.h> |
| 28 | #include <linux/platform_device.h> |
| 29 | #include <linux/of.h> |
| 30 | |
| 31 | static int usb_hcd_mcs814x_probe(const struct hc_driver *driver, |
| 32 | struct platform_device *pdev) |
| 33 | { |
| 34 | int retval; |
| 35 | struct usb_hcd *hcd; |
| 36 | |
| 37 | if (pdev->resource[1].flags != IORESOURCE_IRQ) { |
| 38 | pr_debug("resource[1] is not IORESOURCE_IRQ"); |
| 39 | return -ENOMEM; |
| 40 | } |
| 41 | |
| 42 | pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); |
| 43 | pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; |
| 44 | |
| 45 | hcd = usb_create_hcd(driver, &pdev->dev, "mcs814x"); |
| 46 | if (hcd == NULL) |
| 47 | return -ENOMEM; |
| 48 | |
| 49 | hcd->rsrc_start = pdev->resource[0].start; |
| 50 | hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1; |
| 51 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { |
| 52 | usb_put_hcd(hcd); |
| 53 | retval = -EBUSY; |
| 54 | goto err1; |
| 55 | } |
| 56 | |
| 57 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); |
| 58 | if (hcd->regs == NULL) { |
| 59 | pr_debug("ioremap failed"); |
| 60 | retval = -ENOMEM; |
| 61 | goto err2; |
| 62 | } |
| 63 | |
| 64 | ohci_hcd_init(hcd_to_ohci(hcd)); |
| 65 | |
| 66 | retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_DISABLED); |
| 67 | if (retval == 0) |
| 68 | return retval; |
| 69 | |
| 70 | iounmap(hcd->regs); |
| 71 | err2: |
| 72 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 73 | err1: |
| 74 | usb_put_hcd(hcd); |
| 75 | |
| 76 | return retval; |
| 77 | } |
| 78 | |
| 79 | static void usb_hcd_mcs814x_remove(struct usb_hcd *hcd, |
| 80 | struct platform_device *pdev) |
| 81 | { |
| 82 | usb_remove_hcd(hcd); |
| 83 | iounmap(hcd->regs); |
| 84 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 85 | usb_put_hcd(hcd); |
| 86 | } |
| 87 | |
| 88 | static int __devinit ohci_mcs814x_start(struct usb_hcd *hcd) |
| 89 | { |
| 90 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
| 91 | int ret; |
| 92 | |
| 93 | ret = ohci_init(ohci); |
| 94 | if (ret < 0) |
| 95 | return ret; |
| 96 | |
| 97 | ret = ohci_run(ohci); |
| 98 | if (ret < 0) { |
| 99 | ohci_err(ohci, "can't start %s", hcd->self.bus_name); |
| 100 | ohci_stop(hcd); |
| 101 | return ret; |
| 102 | } |
| 103 | |
| 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | static struct hc_driver ohci_mcs814x_hc_driver = { |
| 108 | .description = hcd_name, |
| 109 | .product_desc = "MCS814X OHCI", |
| 110 | .hcd_priv_size = sizeof(struct ohci_hcd), |
| 111 | .irq = ohci_irq, |
| 112 | .flags = HCD_USB11 | HCD_MEMORY, |
| 113 | .start = ohci_mcs814x_start, |
| 114 | .stop = ohci_stop, |
| 115 | .shutdown = ohci_shutdown, |
| 116 | .urb_enqueue = ohci_urb_enqueue, |
| 117 | .urb_dequeue = ohci_urb_dequeue, |
| 118 | .endpoint_disable = ohci_endpoint_disable, |
| 119 | .get_frame_number = ohci_get_frame, |
| 120 | .hub_status_data = ohci_hub_status_data, |
| 121 | .hub_control = ohci_hub_control, |
| 122 | #ifdef CONFIG_PM |
| 123 | .bus_suspend = ohci_bus_suspend, |
| 124 | .bus_resume = ohci_bus_resume, |
| 125 | #endif |
| 126 | .start_port_reset = ohci_start_port_reset, |
| 127 | }; |
| 128 | |
| 129 | extern int usb_disabled(void); |
| 130 | |
| 131 | static int ohci_hcd_mcs814x_drv_probe(struct platform_device *pdev) |
| 132 | { |
| 133 | int ret; |
| 134 | |
| 135 | ret = -ENODEV; |
| 136 | if (!usb_disabled()) |
| 137 | ret = usb_hcd_mcs814x_probe(&ohci_mcs814x_hc_driver, pdev); |
| 138 | |
| 139 | return ret; |
| 140 | } |
| 141 | |
| 142 | static int ohci_hcd_mcs814x_drv_remove(struct platform_device *pdev) |
| 143 | { |
| 144 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| 145 | |
| 146 | usb_hcd_mcs814x_remove(hcd, pdev); |
| 147 | |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | #ifdef CONFIG_PM |
| 152 | static int ohci_hcd_mcs814x_drv_suspend(struct platform_device *pdev, pm_message_t state) |
| 153 | { |
| 154 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| 155 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
| 156 | |
| 157 | if (time_before(jiffies, ohci->next_statechange)) |
| 158 | msleep(5); |
| 159 | ohci->next_statechange = jiffies; |
| 160 | |
| 161 | hcd->state = HC_STATE_SUSPENDED; |
| 162 | |
| 163 | return 0; |
| 164 | } |
| 165 | |
| 166 | static int ohci_hcd_mcs814x_drv_resume(struct platform_device *pdev) |
| 167 | { |
| 168 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| 169 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); |
| 170 | int status; |
| 171 | |
| 172 | if (time_before(jiffies, ohci->next_statechange)) |
| 173 | msleep(5); |
| 174 | ohci->next_statechange = jiffies; |
| 175 | |
| 176 | ohci_finish_controller_resume(hcd); |
| 177 | return 0; |
| 178 | } |
| 179 | #endif |
| 180 | |
| 181 | static const struct of_device_id mcs814x_ohci_id[] = { |
| 182 | { .compatible = "moschip,mcs814x-ohci" }, |
| 183 | { .compatible = "ohci-le" }, |
| 184 | { /* sentinel */ }, |
| 185 | }; |
| 186 | |
| 187 | static struct platform_driver ohci_hcd_mcs814x_driver = { |
| 188 | .probe = ohci_hcd_mcs814x_drv_probe, |
| 189 | .remove = ohci_hcd_mcs814x_drv_remove, |
| 190 | .shutdown = usb_hcd_platform_shutdown, |
| 191 | #ifdef CONFIG_PM |
| 192 | .suspend = ohci_hcd_mcs814x_drv_suspend, |
| 193 | .resume = ohci_hcd_mcs814x_drv_resume, |
| 194 | #endif |
| 195 | .driver = { |
| 196 | .name = "mcs814x-ohci", |
| 197 | .owner = THIS_MODULE, |
| 198 | .of_match_table = mcs814x_ohci_id, |
| 199 | }, |
| 200 | }; |
| 201 | |
| 202 | MODULE_ALIAS("platform:mcs814x-ohci"); |
| 203 | |
