Merge branch 'linux-next' of git://git.infradead.org/~dedekind/ubifs-2.6
[linux-2.6] / drivers / usb / host / ohci-ssb.c
1 /*
2  * Sonics Silicon Backplane
3  * Broadcom USB-core OHCI driver
4  *
5  * Copyright 2007 Michael Buesch <mb@bu3sch.de>
6  *
7  * Derived from the OHCI-PCI driver
8  * Copyright 1999 Roman Weissgaerber
9  * Copyright 2000-2002 David Brownell
10  * Copyright 1999 Linus Torvalds
11  * Copyright 1999 Gregory P. Smith
12  *
13  * Derived from the USBcore related parts of Broadcom-SB
14  * Copyright 2005 Broadcom Corporation
15  *
16  * Licensed under the GNU/GPL. See COPYING for details.
17  */
18 #include <linux/ssb/ssb.h>
19
20
21 #define SSB_OHCI_TMSLOW_HOSTMODE        (1 << 29)
22
23 struct ssb_ohci_device {
24         struct ohci_hcd ohci; /* _must_ be at the beginning. */
25
26         u32 enable_flags;
27 };
28
29 static inline
30 struct ssb_ohci_device *hcd_to_ssb_ohci(struct usb_hcd *hcd)
31 {
32         return (struct ssb_ohci_device *)(hcd->hcd_priv);
33 }
34
35
36 static int ssb_ohci_reset(struct usb_hcd *hcd)
37 {
38         struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
39         struct ohci_hcd *ohci = &ohcidev->ohci;
40         int err;
41
42         ohci_hcd_init(ohci);
43         err = ohci_init(ohci);
44
45         return err;
46 }
47
48 static int ssb_ohci_start(struct usb_hcd *hcd)
49 {
50         struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
51         struct ohci_hcd *ohci = &ohcidev->ohci;
52         int err;
53
54         err = ohci_run(ohci);
55         if (err < 0) {
56                 ohci_err(ohci, "can't start\n");
57                 ohci_stop(hcd);
58         }
59
60         return err;
61 }
62
63 static const struct hc_driver ssb_ohci_hc_driver = {
64         .description            = "ssb-usb-ohci",
65         .product_desc           = "SSB OHCI Controller",
66         .hcd_priv_size          = sizeof(struct ssb_ohci_device),
67
68         .irq                    = ohci_irq,
69         .flags                  = HCD_MEMORY | HCD_USB11,
70
71         .reset                  = ssb_ohci_reset,
72         .start                  = ssb_ohci_start,
73         .stop                   = ohci_stop,
74         .shutdown               = ohci_shutdown,
75
76         .urb_enqueue            = ohci_urb_enqueue,
77         .urb_dequeue            = ohci_urb_dequeue,
78         .endpoint_disable       = ohci_endpoint_disable,
79
80         .get_frame_number       = ohci_get_frame,
81
82         .hub_status_data        = ohci_hub_status_data,
83         .hub_control            = ohci_hub_control,
84 #ifdef  CONFIG_PM
85         .bus_suspend            = ohci_bus_suspend,
86         .bus_resume             = ohci_bus_resume,
87 #endif
88
89         .start_port_reset       = ohci_start_port_reset,
90 };
91
92 static void ssb_ohci_detach(struct ssb_device *dev)
93 {
94         struct usb_hcd *hcd = ssb_get_drvdata(dev);
95
96         usb_remove_hcd(hcd);
97         iounmap(hcd->regs);
98         usb_put_hcd(hcd);
99         ssb_device_disable(dev, 0);
100 }
101
102 static int ssb_ohci_attach(struct ssb_device *dev)
103 {
104         struct ssb_ohci_device *ohcidev;
105         struct usb_hcd *hcd;
106         int err = -ENOMEM;
107         u32 tmp, flags = 0;
108
109         if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV)
110                 flags |= SSB_OHCI_TMSLOW_HOSTMODE;
111
112         ssb_device_enable(dev, flags);
113
114         hcd = usb_create_hcd(&ssb_ohci_hc_driver, dev->dev,
115                         dev_name(dev->dev));
116         if (!hcd)
117                 goto err_dev_disable;
118         ohcidev = hcd_to_ssb_ohci(hcd);
119         ohcidev->enable_flags = flags;
120
121         tmp = ssb_read32(dev, SSB_ADMATCH0);
122         hcd->rsrc_start = ssb_admatch_base(tmp);
123         hcd->rsrc_len = ssb_admatch_size(tmp);
124         hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
125         if (!hcd->regs)
126                 goto err_put_hcd;
127         err = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED);
128         if (err)
129                 goto err_iounmap;
130
131         ssb_set_drvdata(dev, hcd);
132
133         return err;
134
135 err_iounmap:
136         iounmap(hcd->regs);
137 err_put_hcd:
138         usb_put_hcd(hcd);
139 err_dev_disable:
140         ssb_device_disable(dev, flags);
141         return err;
142 }
143
144 static int ssb_ohci_probe(struct ssb_device *dev,
145                 const struct ssb_device_id *id)
146 {
147         int err;
148         u16 chipid_top;
149
150         /* USBcores are only connected on embedded devices. */
151         chipid_top = (dev->bus->chip_id & 0xFF00);
152         if (chipid_top != 0x4700 && chipid_top != 0x5300)
153                 return -ENODEV;
154
155         /* TODO: Probably need checks here; is the core connected? */
156
157         if (usb_disabled())
158                 return -ENODEV;
159
160         /* We currently always attach SSB_DEV_USB11_HOSTDEV
161          * as HOST OHCI. If we want to attach it as Client device,
162          * we must branch here and call into the (yet to
163          * be written) Client mode driver. Same for remove(). */
164
165         err = ssb_ohci_attach(dev);
166
167         return err;
168 }
169
170 static void ssb_ohci_remove(struct ssb_device *dev)
171 {
172         ssb_ohci_detach(dev);
173 }
174
175 #ifdef CONFIG_PM
176
177 static int ssb_ohci_suspend(struct ssb_device *dev, pm_message_t state)
178 {
179         ssb_device_disable(dev, 0);
180
181         return 0;
182 }
183
184 static int ssb_ohci_resume(struct ssb_device *dev)
185 {
186         struct usb_hcd *hcd = ssb_get_drvdata(dev);
187         struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
188
189         ssb_device_enable(dev, ohcidev->enable_flags);
190
191         ohci_finish_controller_resume(hcd);
192         return 0;
193 }
194
195 #else /* !CONFIG_PM */
196 #define ssb_ohci_suspend        NULL
197 #define ssb_ohci_resume NULL
198 #endif /* CONFIG_PM */
199
200 static const struct ssb_device_id ssb_ohci_table[] = {
201         SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOSTDEV, SSB_ANY_REV),
202         SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOST, SSB_ANY_REV),
203         SSB_DEVTABLE_END
204 };
205 MODULE_DEVICE_TABLE(ssb, ssb_ohci_table);
206
207 static struct ssb_driver ssb_ohci_driver = {
208         .name           = KBUILD_MODNAME,
209         .id_table       = ssb_ohci_table,
210         .probe          = ssb_ohci_probe,
211         .remove         = ssb_ohci_remove,
212         .suspend        = ssb_ohci_suspend,
213         .resume         = ssb_ohci_resume,
214 };