drivers/usb/host/ehci-pci.c

   1 /*-
   2  * Copyright (c) 2007-2008, Juniper Networks, Inc.
   3  * All rights reserved.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0
   6  */
   7
   8 #include <common.h>
   9 #include <dm.h>
  10 #include <errno.h>
  11 #include <pci.h>
  12 #include <usb.h>
  13
  14 #include "ehci.h"
  15
  16 /* Information about a USB port */
  17 struct ehci_pci_priv {
  18         struct ehci_ctrl ehci;
  19 };
  20
  21 #ifdef CONFIG_DM_USB
  22
  23 static void ehci_pci_init(struct udevice *dev, struct ehci_hccr **ret_hccr,
  24                           struct ehci_hcor **ret_hcor)
  25 {
  26         struct ehci_hccr *hccr;
  27         struct ehci_hcor *hcor;
  28         u32 cmd;
  29
  30         hccr = (struct ehci_hccr *)dm_pci_map_bar(dev,
  31                         PCI_BASE_ADDRESS_0, PCI_REGION_MEM);
  32         hcor = (struct ehci_hcor *)((uintptr_t) hccr +
  33                         HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
  34
  35         debug("EHCI-PCI init hccr 0x%x and hcor 0x%x hc_length %d\n",
  36               (u32)hccr, (u32)hcor,
  37               (u32)HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
  38
  39         *ret_hccr = hccr;
  40         *ret_hcor = hcor;
  41
  42         /* enable busmaster */
  43         dm_pci_read_config32(dev, PCI_COMMAND, &cmd);
  44         cmd |= PCI_COMMAND_MASTER;
  45         dm_pci_write_config32(dev, PCI_COMMAND, cmd);
  46 }
  47
  48 #else
  49
  50 #ifdef CONFIG_PCI_EHCI_DEVICE
  51 static struct pci_device_id ehci_pci_ids[] = {
  52         /* Please add supported PCI EHCI controller ids here */
  53         {0x1033, 0x00E0},       /* NEC */
  54         {0x10B9, 0x5239},       /* ULI1575 PCI EHCI module ids */
  55         {0x12D8, 0x400F},       /* Pericom */
  56         {0, 0}
  57 };
  58 #endif
  59
  60 static void ehci_pci_legacy_init(pci_dev_t pdev, struct ehci_hccr **ret_hccr,
  61                                  struct ehci_hcor **ret_hcor)
  62 {
  63         struct ehci_hccr *hccr;
  64         struct ehci_hcor *hcor;
  65         u32 cmd;
  66
  67         hccr = (struct ehci_hccr *)pci_map_bar(pdev,
  68                         PCI_BASE_ADDRESS_0, PCI_REGION_MEM);
  69         hcor = (struct ehci_hcor *)((uintptr_t) hccr +
  70                         HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
  71
  72         debug("EHCI-PCI init hccr 0x%x and hcor 0x%x hc_length %d\n",
  73               (u32)hccr, (u32)hcor,
  74               (u32)HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
  75
  76         *ret_hccr = hccr;
  77         *ret_hcor = hcor;
  78
  79         /* enable busmaster */
  80         pci_read_config_dword(pdev, PCI_COMMAND, &cmd);
  81         cmd |= PCI_COMMAND_MASTER;
  82         pci_write_config_dword(pdev, PCI_COMMAND, cmd);
  83 }
  84
  85 /*
  86  * Create the appropriate control structures to manage
  87  * a new EHCI host controller.
  88  */
  89 int ehci_hcd_init(int index, enum usb_init_type init,
  90                 struct ehci_hccr **ret_hccr, struct ehci_hcor **ret_hcor)
  91 {
  92         pci_dev_t pdev;
  93
  94 #ifdef CONFIG_PCI_EHCI_DEVICE
  95         pdev = pci_find_devices(ehci_pci_ids, CONFIG_PCI_EHCI_DEVICE);
  96 #else
  97         pdev = pci_find_class(PCI_CLASS_SERIAL_USB_EHCI, index);
  98 #endif
  99         if (pdev < 0) {
 100                 printf("EHCI host controller not found\n");
 101                 return -1;
 102         }
 103         ehci_pci_legacy_init(pdev, ret_hccr, ret_hcor);
 104
 105         return 0;
 106 }
 107
 108 /*
 109  * Destroy the appropriate control structures corresponding
 110  * the the EHCI host controller.
 111  */
 112 int ehci_hcd_stop(int index)
 113 {
 114         return 0;
 115 }
 116 #endif /* nCONFIG_DM_USB */
 117
 118 #ifdef CONFIG_DM_USB
 119 static int ehci_pci_probe(struct udevice *dev)
 120 {
 121         struct ehci_hccr *hccr;
 122         struct ehci_hcor *hcor;
 123
 124         ehci_pci_init(dev, &hccr, &hcor);
 125
 126         return ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
 127 }
 128
 129 static int ehci_pci_remove(struct udevice *dev)
 130 {
 131         int ret;
 132
 133         ret = ehci_deregister(dev);
 134         if (ret)
 135                 return ret;
 136
 137         return 0;
 138 }
 139
 140 U_BOOT_DRIVER(ehci_pci) = {
 141         .name   = "ehci_pci",
 142         .id     = UCLASS_USB,
 143         .probe = ehci_pci_probe,
 144         .remove = ehci_pci_remove,
 145         .ops    = &ehci_usb_ops,
 146         .platdata_auto_alloc_size = sizeof(struct usb_platdata),
 147         .priv_auto_alloc_size = sizeof(struct ehci_pci_priv),
 148         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
 149 };
 150
 151 static struct pci_device_id ehci_pci_supported[] = {
 152         { PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_EHCI, ~0) },
 153         {},
 154 };
 155
 156 U_BOOT_PCI_DEVICE(ehci_pci, ehci_pci_supported);
 157
 158 #endif /* CONFIG_DM_USB */