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Viewing changes to drivers/usb/host/ehci-vt8500.c

  • Committer: Bazaar Package Importer
  • Author(s): Ben Hutchings, Ben Hutchings, Aurelien Jarno, Martin Michlmayr
  • Date: 2011-04-06 13:53:30 UTC
  • mfrom: (43.1.5 sid)
  • Revision ID: james.westby@ubuntu.com-20110406135330-wjufxhd0tvn3zx4z
Tags: 2.6.38-3
http://bugs.debian.org/620124
http://bugs.debian.org/620284
http://bugs.debian.org/620204
[ Ben Hutchings ]
* [ppc64] Add to linux-tools package architectures (Closes: #620124)
* [amd64] Save cr4 to mmu_cr4_features at boot time (Closes: #620284)
* appletalk: Fix bugs introduced when removing use of BKL
* ALSA: Fix yet another race in disconnection
* cciss: Fix lost command issue
* ath9k: Fix kernel panic in AR2427
* ses: Avoid kernel panic when lun 0 is not mapped
* PCI/ACPI: Report ASPM support to BIOS if not disabled from command line

[ Aurelien Jarno ]
* rtlwifi: fix build when PCI is not enabled.

[ Martin Michlmayr ]
* rtlwifi: Eliminate udelay calls with too large values (Closes: #620204)

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drivers/usb/host/ehci-vt8500.c
 
1
/*
 
2
 * drivers/usb/host/ehci-vt8500.c
 
3
 *
 
4
 * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com>
 
5
 *
 
6
 * Based on ehci-au1xxx.c
 
7
 *
 
8
 * This software is licensed under the terms of the GNU General Public
 
9
 * License version 2, as published by the Free Software Foundation, and
 
10
 * may be copied, distributed, and modified under those terms.
 
11
 *
 
12
 * This program is distributed in the hope that it will be useful,
 
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
15
 * GNU General Public License for more details.
 
16
 *
 
17
 */
 
18
 
 
19
#include <linux/platform_device.h>
 
20
 
 
21
static int ehci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
 
22
{
 
23
        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 
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        int rc = 0;
 
25
 
 
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        if (!udev->parent) /* udev is root hub itself, impossible */
 
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                rc = -1;
 
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        /* we only support lpm device connected to root hub yet */
 
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        if (ehci->has_lpm && !udev->parent->parent) {
 
30
                rc = ehci_lpm_set_da(ehci, udev->devnum, udev->portnum);
 
31
                if (!rc)
 
32
                        rc = ehci_lpm_check(ehci, udev->portnum);
 
33
        }
 
34
        return rc;
 
35
}
 
36
 
 
37
static const struct hc_driver vt8500_ehci_hc_driver = {
 
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        .description            = hcd_name,
 
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        .product_desc           = "VT8500 EHCI",
 
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        .hcd_priv_size          = sizeof(struct ehci_hcd),
 
41
 
 
42
        /*
 
43
         * generic hardware linkage
 
44
         */
 
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        .irq                    = ehci_irq,
 
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        .flags                  = HCD_MEMORY | HCD_USB2,
 
47
 
 
48
        /*
 
49
         * basic lifecycle operations
 
50
         */
 
51
        .reset                  = ehci_init,
 
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        .start                  = ehci_run,
 
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        .stop                   = ehci_stop,
 
54
        .shutdown               = ehci_shutdown,
 
55
 
 
56
        /*
 
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         * managing i/o requests and associated device resources
 
58
         */
 
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        .urb_enqueue            = ehci_urb_enqueue,
 
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        .urb_dequeue            = ehci_urb_dequeue,
 
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        .endpoint_disable       = ehci_endpoint_disable,
 
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        .endpoint_reset         = ehci_endpoint_reset,
 
63
 
 
64
        /*
 
65
         * scheduling support
 
66
         */
 
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        .get_frame_number       = ehci_get_frame,
 
68
 
 
69
        /*
 
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         * root hub support
 
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         */
 
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        .hub_status_data        = ehci_hub_status_data,
 
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        .hub_control            = ehci_hub_control,
 
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        .bus_suspend            = ehci_bus_suspend,
 
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        .bus_resume             = ehci_bus_resume,
 
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        .relinquish_port        = ehci_relinquish_port,
 
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        .port_handed_over       = ehci_port_handed_over,
 
78
 
 
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        /*
 
80
         * call back when device connected and addressed
 
81
         */
 
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        .update_device =        ehci_update_device,
 
83
 
 
84
        .clear_tt_buffer_complete       = ehci_clear_tt_buffer_complete,
 
85
};
 
86
 
 
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static int vt8500_ehci_drv_probe(struct platform_device *pdev)
 
88
{
 
89
        struct usb_hcd *hcd;
 
90
        struct ehci_hcd *ehci;
 
91
        struct resource *res;
 
92
        int ret;
 
93
 
 
94
        if (usb_disabled())
 
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                return -ENODEV;
 
96
 
 
97
        if (pdev->resource[1].flags != IORESOURCE_IRQ) {
 
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                pr_debug("resource[1] is not IORESOURCE_IRQ");
 
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                return -ENOMEM;
 
100
        }
 
101
        hcd = usb_create_hcd(&vt8500_ehci_hc_driver, &pdev->dev, "VT8500");
 
102
        if (!hcd)
 
103
                return -ENOMEM;
 
104
 
 
105
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
106
        hcd->rsrc_start = res->start;
 
107
        hcd->rsrc_len = resource_size(res);
 
108
 
 
109
        if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 
110
                pr_debug("request_mem_region failed");
 
111
                ret = -EBUSY;
 
112
                goto err1;
 
113
        }
 
114
 
 
115
        hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
 
116
        if (!hcd->regs) {
 
117
                pr_debug("ioremap failed");
 
118
                ret = -ENOMEM;
 
119
                goto err2;
 
120
        }
 
121
 
 
122
        ehci = hcd_to_ehci(hcd);
 
123
        ehci->caps = hcd->regs;
 
124
        ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
 
125
 
 
126
        dbg_hcs_params(ehci, "reset");
 
127
        dbg_hcc_params(ehci, "reset");
 
128
 
 
129
        /* cache this readonly data; minimize chip reads */
 
130
        ehci->hcs_params = readl(&ehci->caps->hcs_params);
 
131
 
 
132
        ehci_port_power(ehci, 1);
 
133
 
 
134
        ret = usb_add_hcd(hcd, pdev->resource[1].start,
 
135
                          IRQF_DISABLED | IRQF_SHARED);
 
136
        if (ret == 0) {
 
137
                platform_set_drvdata(pdev, hcd);
 
138
                return ret;
 
139
        }
 
140
 
 
141
        iounmap(hcd->regs);
 
142
err2:
 
143
        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 
144
err1:
 
145
        usb_put_hcd(hcd);
 
146
        return ret;
 
147
}
 
148
 
 
149
static int vt8500_ehci_drv_remove(struct platform_device *pdev)
 
150
{
 
151
        struct usb_hcd *hcd = platform_get_drvdata(pdev);
 
152
 
 
153
        usb_remove_hcd(hcd);
 
154
        iounmap(hcd->regs);
 
155
        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 
156
        usb_put_hcd(hcd);
 
157
        platform_set_drvdata(pdev, NULL);
 
158
 
 
159
        return 0;
 
160
}
 
161
 
 
162
static struct platform_driver vt8500_ehci_driver = {
 
163
        .probe          = vt8500_ehci_drv_probe,
 
164
        .remove         = vt8500_ehci_drv_remove,
 
165
        .shutdown       = usb_hcd_platform_shutdown,
 
166
        .driver = {
 
167
                .name   = "vt8500-ehci",
 
168
                .owner  = THIS_MODULE,
 
169
        }
 
170
};
 
171
 
 
172
MODULE_ALIAS("platform:vt8500-ehci");