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usb: ehci: generic PCI support
[karo-tx-uboot.git] / drivers / usb / host / ehci-pci.c
1 /*-
2  * Copyright (c) 2007-2008, Juniper Networks, Inc.
3  * All rights reserved.
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License as
7  * published by the Free Software Foundation version 2 of
8  * the License.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
18  * MA 02111-1307 USA
19  */
20
21 #include <common.h>
22 #include <errno.h>
23 #include <pci.h>
24 #include <usb.h>
25
26 #include "ehci.h"
27
28 #ifdef CONFIG_PCI_EHCI_DEVICE
29 static struct pci_device_id ehci_pci_ids[] = {
30         /* Please add supported PCI EHCI controller ids here */
31         {0x1033, 0x00E0},       /* NEC */
32         {0x10B9, 0x5239},       /* ULI1575 PCI EHCI module ids */
33         {0x12D8, 0x400F},       /* Pericom */
34         {0, 0}
35 };
36 #else
37 static pci_dev_t ehci_find_class(void)
38 {
39         int bus;
40         int devnum;
41         pci_dev_t bdf;
42         uint32_t class;
43
44         for (bus = 0; bus <= pci_last_busno(); bus++) {
45                 for (devnum = 0; devnum < PCI_MAX_PCI_DEVICES-1; devnum++) {
46                         pci_read_config_dword(PCI_BDF(bus, devnum, 0),
47                                               PCI_CLASS_REVISION, &class);
48                         if (class >> 16 == 0xffff)
49                                 continue;
50
51                         for (bdf = PCI_BDF(bus, devnum, 0);
52                                         bdf <= PCI_BDF(bus, devnum,
53                                                 PCI_MAX_PCI_FUNCTIONS - 1);
54                                         bdf += PCI_BDF(0, 0, 1)) {
55                                 pci_read_config_dword(bdf, PCI_CLASS_REVISION,
56                                                       &class);
57                                 if (class >> 8 == PCI_CLASS_SERIAL_USB_EHCI)
58                                         return bdf;
59                         }
60                 }
61         }
62
63         return -ENODEV;
64 }
65 #endif
66
67 /*
68  * Create the appropriate control structures to manage
69  * a new EHCI host controller.
70  */
71 int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
72 {
73         pci_dev_t pdev;
74         uint32_t cmd;
75
76 #ifdef CONFIG_PCI_EHCI_DEVICE
77         pdev = pci_find_devices(ehci_pci_ids, CONFIG_PCI_EHCI_DEVICE);
78 #else
79         pdev = ehci_find_class();
80 #endif
81         if (pdev < 0) {
82                 printf("EHCI host controller not found\n");
83                 return -1;
84         }
85
86         *hccr = (struct ehci_hccr *)pci_map_bar(pdev,
87                         PCI_BASE_ADDRESS_0, PCI_REGION_MEM);
88         *hcor = (struct ehci_hcor *)((uint32_t) *hccr +
89                         HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
90
91         debug("EHCI-PCI init hccr 0x%x and hcor 0x%x hc_length %d\n",
92                         (uint32_t)*hccr, (uint32_t)*hcor,
93                         (uint32_t)HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
94
95         /* enable busmaster */
96         pci_read_config_dword(pdev, PCI_COMMAND, &cmd);
97         cmd |= PCI_COMMAND_MASTER;
98         pci_write_config_dword(pdev, PCI_COMMAND, cmd);
99         return 0;
100 }
101
102 /*
103  * Destroy the appropriate control structures corresponding
104  * the the EHCI host controller.
105  */
106 int ehci_hcd_stop(int index)
107 {
108         return 0;
109 }