drivers/usb/host/ohci-ppc-of.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  * (C) Copyright 2006 Sylvain Munaut <tnt@246tNt.com>
   8  *
   9  * Bus glue for OHCI HC on the of_platform bus
  10  *
  11  * Modified for of_platform bus from ohci-sa1111.c
  12  *
  13  * This file is licenced under the GPL.
  14  */
  15
  16 #include <linux/signal.h>
  17
  18 #include <asm/of_platform.h>
  19 #include <asm/prom.h>
  20
  21
  22 static int __devinit
  23 ohci_ppc_of_start(struct usb_hcd *hcd)
  24 {
  25         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
  26         int             ret;
  27
  28         if ((ret = ohci_init(ohci)) < 0)
  29                 return ret;
  30
  31         if ((ret = ohci_run(ohci)) < 0) {
  32                 err("can't start %s", ohci_to_hcd(ohci)->self.bus_name);
  33                 ohci_stop(hcd);
  34                 return ret;
  35         }
  36
  37         return 0;
  38 }
  39
  40 static const struct hc_driver ohci_ppc_of_hc_driver = {
  41         .description =          hcd_name,
  42         .product_desc =         "OF OHCI",
  43         .hcd_priv_size =        sizeof(struct ohci_hcd),
  44
  45         /*
  46          * generic hardware linkage
  47          */
  48         .irq =                  ohci_irq,
  49         .flags =                HCD_USB11 | HCD_MEMORY,
  50
  51         /*
  52          * basic lifecycle operations
  53          */
  54         .start =                ohci_ppc_of_start,
  55         .stop =                 ohci_stop,
  56         .shutdown =             ohci_shutdown,
  57
  58         /*
  59          * managing i/o requests and associated device resources
  60          */
  61         .urb_enqueue =          ohci_urb_enqueue,
  62         .urb_dequeue =          ohci_urb_dequeue,
  63         .endpoint_disable =     ohci_endpoint_disable,
  64
  65         /*
  66          * scheduling support
  67          */
  68         .get_frame_number =     ohci_get_frame,
  69
  70         /*
  71          * root hub support
  72          */
  73         .hub_status_data =      ohci_hub_status_data,
  74         .hub_control =          ohci_hub_control,
  75         .hub_irq_enable =       ohci_rhsc_enable,
  76 #ifdef  CONFIG_PM
  77         .bus_suspend =          ohci_bus_suspend,
  78         .bus_resume =           ohci_bus_resume,
  79 #endif
  80         .start_port_reset =     ohci_start_port_reset,
  81 };
  82
  83
  84 static int __devinit
  85 ohci_hcd_ppc_of_probe(struct of_device *op, const struct of_device_id *match)
  86 {
  87         struct device_node *dn = op->node;
  88         struct usb_hcd *hcd;
  89         struct ohci_hcd *ohci;
  90         struct resource res;
  91         int irq;
  92
  93         int rv;
  94         int is_bigendian;
  95
  96         if (usb_disabled())
  97                 return -ENODEV;
  98
  99         is_bigendian =
 100                 of_device_is_compatible(dn, "ohci-bigendian") ||
 101                 of_device_is_compatible(dn, "ohci-be");
 102
 103         dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n");
 104
 105         rv = of_address_to_resource(dn, 0, &res);
 106         if (rv)
 107                 return rv;
 108
 109         hcd = usb_create_hcd(&ohci_ppc_of_hc_driver, &op->dev, "PPC-OF USB");
 110         if (!hcd)
 111                 return -ENOMEM;
 112
 113         hcd->rsrc_start = res.start;
 114         hcd->rsrc_len = res.end - res.start + 1;
 115
 116         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 117                 printk(KERN_ERR __FILE__ ": request_mem_region failed\n");
 118                 rv = -EBUSY;
 119                 goto err_rmr;
 120         }
 121
 122         irq = irq_of_parse_and_map(dn, 0);
 123         if (irq == NO_IRQ) {
 124                 printk(KERN_ERR __FILE__ ": irq_of_parse_and_map failed\n");
 125                 rv = -EBUSY;
 126                 goto err_irq;
 127         }
 128
 129         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
 130         if (!hcd->regs) {
 131                 printk(KERN_ERR __FILE__ ": ioremap failed\n");
 132                 rv = -ENOMEM;
 133                 goto err_ioremap;
 134         }
 135
 136         ohci = hcd_to_ohci(hcd);
 137         if (is_bigendian) {
 138                 ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
 139                 if (of_device_is_compatible(dn, "mpc5200-ohci"))
 140                         ohci->flags |= OHCI_QUIRK_FRAME_NO;
 141         }
 142
 143         ohci_hcd_init(ohci);
 144
 145         rv = usb_add_hcd(hcd, irq, IRQF_DISABLED);
 146         if (rv == 0)
 147                 return 0;
 148
 149         iounmap(hcd->regs);
 150 err_ioremap:
 151         irq_dispose_mapping(irq);
 152 err_irq:
 153         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 154 err_rmr:
 155         usb_put_hcd(hcd);
 156
 157         return rv;
 158 }
 159
 160 static int ohci_hcd_ppc_of_remove(struct of_device *op)
 161 {
 162         struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
 163         dev_set_drvdata(&op->dev, NULL);
 164
 165         dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n");
 166
 167         usb_remove_hcd(hcd);
 168
 169         iounmap(hcd->regs);
 170         irq_dispose_mapping(hcd->irq);
 171         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 172
 173         usb_put_hcd(hcd);
 174
 175         return 0;
 176 }
 177
 178 static int ohci_hcd_ppc_of_shutdown(struct of_device *op)
 179 {
 180         struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
 181
 182         if (hcd->driver->shutdown)
 183                 hcd->driver->shutdown(hcd);
 184
 185         return 0;
 186 }
 187
 188
 189 static struct of_device_id ohci_hcd_ppc_of_match[] = {
 190 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_BE
 191         {
 192                 .name = "usb",
 193                 .compatible = "ohci-bigendian",
 194         },
 195         {
 196                 .name = "usb",
 197                 .compatible = "ohci-be",
 198         },
 199 #endif
 200 #ifdef CONFIG_USB_OHCI_HCD_PPC_OF_LE
 201         {
 202                 .name = "usb",
 203                 .compatible = "ohci-littledian",
 204         },
 205         {
 206                 .name = "usb",
 207                 .compatible = "ohci-le",
 208         },
 209 #endif
 210         {},
 211 };
 212 MODULE_DEVICE_TABLE(of, ohci_hcd_ppc_of_match);
 213
 214 #if     !defined(CONFIG_USB_OHCI_HCD_PPC_OF_BE) && \
 215         !defined(CONFIG_USB_OHCI_HCD_PPC_OF_LE)
 216 #error "No endianess selected for ppc-of-ohci"
 217 #endif
 218
 219
 220 static struct of_platform_driver ohci_hcd_ppc_of_driver = {
 221         .name           = "ppc-of-ohci",
 222         .match_table    = ohci_hcd_ppc_of_match,
 223         .probe          = ohci_hcd_ppc_of_probe,
 224         .remove         = ohci_hcd_ppc_of_remove,
 225         .shutdown       = ohci_hcd_ppc_of_shutdown,
 226 #ifdef CONFIG_PM
 227         /*.suspend      = ohci_hcd_ppc_soc_drv_suspend,*/
 228         /*.resume       = ohci_hcd_ppc_soc_drv_resume,*/
 229 #endif
 230         .driver         = {
 231                 .name   = "ppc-of-ohci",
 232                 .owner  = THIS_MODULE,
 233         },
 234 };
 235