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/*-
* Copyright (c) 2007-2008, Juniper Networks, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2 of
* the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <errno.h>
#include <pci.h>
#include <usb.h>
#include "ehci.h"
#ifdef CONFIG_PCI_EHCI_DEVICE
static struct pci_device_id ehci_pci_ids[] = {
/* Please add supported PCI EHCI controller ids here */
{0x1033, 0x00E0}, /* NEC */
{0x10B9, 0x5239}, /* ULI1575 PCI EHCI module ids */
{0x12D8, 0x400F}, /* Pericom */
{0, 0}
};
#else
static pci_dev_t ehci_find_class(int index)
{
int bus;
int devnum;
pci_dev_t bdf;
uint32_t class;
for (bus = 0; bus <= pci_last_busno(); bus++) {
for (devnum = 0; devnum < PCI_MAX_PCI_DEVICES-1; devnum++) {
pci_read_config_dword(PCI_BDF(bus, devnum, 0),
PCI_CLASS_REVISION, &class);
if (class >> 16 == 0xffff)
continue;
for (bdf = PCI_BDF(bus, devnum, 0);
bdf <= PCI_BDF(bus, devnum,
PCI_MAX_PCI_FUNCTIONS - 1);
bdf += PCI_BDF(0, 0, 1)) {
pci_read_config_dword(bdf, PCI_CLASS_REVISION,
&class);
class >>= 8;
/*
* Here be dragons! In case we have multiple
* PCI EHCI controllers, this function will
* be called multiple times as well. This
* function will scan the PCI busses, always
* starting from bus 0, device 0, function 0,
* until it finds an USB controller. The USB
* stack gives us an 'index' of a controller
* that is currently being registered, which
* is a number, starting from 0 and growing
* in ascending order as controllers are added.
* To avoid probing the same controller in tne
* subsequent runs of this function, we will
* skip 'index - 1' detected controllers and
* report the index'th controller.
*/
if (class != PCI_CLASS_SERIAL_USB_EHCI)
continue;
if (index) {
index--;
continue;
}
/* Return index'th controller. */
return bdf;
}
}
}
return -ENODEV;
}
#endif
/*
* Create the appropriate control structures to manage
* a new EHCI host controller.
*/
int ehci_hcd_init(int index, enum usb_init_type init,
struct ehci_hccr **ret_hccr, struct ehci_hcor **ret_hcor)
{
pci_dev_t pdev;
uint32_t cmd;
struct ehci_hccr *hccr;
struct ehci_hcor *hcor;
#ifdef CONFIG_PCI_EHCI_DEVICE
pdev = pci_find_devices(ehci_pci_ids, CONFIG_PCI_EHCI_DEVICE);
#else
pdev = ehci_find_class(index);
#endif
if (pdev < 0) {
printf("EHCI host controller not found\n");
return -1;
}
hccr = (struct ehci_hccr *)pci_map_bar(pdev,
PCI_BASE_ADDRESS_0, PCI_REGION_MEM);
hcor = (struct ehci_hcor *)((uint32_t) hccr +
HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
debug("EHCI-PCI init hccr 0x%x and hcor 0x%x hc_length %d\n",
(uint32_t)hccr, (uint32_t)hcor,
(uint32_t)HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
*ret_hccr = hccr;
*ret_hcor = hcor;
/* enable busmaster */
pci_read_config_dword(pdev, PCI_COMMAND, &cmd);
cmd |= PCI_COMMAND_MASTER;
pci_write_config_dword(pdev, PCI_COMMAND, cmd);
return 0;
}
/*
* Destroy the appropriate control structures corresponding
* the the EHCI host controller.
*/
int ehci_hcd_stop(int index)
{
return 0;
}
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