target/linux/mcs814x/files-3.18/drivers/usb/host/ohci-mcs814x.c

   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 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");