Merge branch 'upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik...
[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 #ifdef CONFIG_PM
64 static int ssb_ohci_hcd_suspend(struct usb_hcd *hcd, pm_message_t message)
65 {
66         struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
67         struct ohci_hcd *ohci = &ohcidev->ohci;
68         unsigned long flags;
69
70         spin_lock_irqsave(&ohci->lock, flags);
71
72         ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
73         ohci_readl(ohci, &ohci->regs->intrdisable); /* commit write */
74
75         /* make sure snapshot being resumed re-enumerates everything */
76         if (message.event == PM_EVENT_PRETHAW)
77                 ohci_usb_reset(ohci);
78
79         clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
80
81         spin_unlock_irqrestore(&ohci->lock, flags);
82         return 0;
83 }
84
85 static int ssb_ohci_hcd_resume(struct usb_hcd *hcd)
86 {
87         set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
88         usb_hcd_resume_root_hub(hcd);
89         return 0;
90 }
91 #endif /* CONFIG_PM */
92
93 static const struct hc_driver ssb_ohci_hc_driver = {
94         .description            = "ssb-usb-ohci",
95         .product_desc           = "SSB OHCI Controller",
96         .hcd_priv_size          = sizeof(struct ssb_ohci_device),
97
98         .irq                    = ohci_irq,
99         .flags                  = HCD_MEMORY | HCD_USB11,
100
101         .reset                  = ssb_ohci_reset,
102         .start                  = ssb_ohci_start,
103         .stop                   = ohci_stop,
104         .shutdown               = ohci_shutdown,
105
106 #ifdef CONFIG_PM
107         .suspend                = ssb_ohci_hcd_suspend,
108         .resume                 = ssb_ohci_hcd_resume,
109 #endif
110
111         .urb_enqueue            = ohci_urb_enqueue,
112         .urb_dequeue            = ohci_urb_dequeue,
113         .endpoint_disable       = ohci_endpoint_disable,
114
115         .get_frame_number       = ohci_get_frame,
116
117         .hub_status_data        = ohci_hub_status_data,
118         .hub_control            = ohci_hub_control,
119         .hub_irq_enable         = ohci_rhsc_enable,
120         .bus_suspend            = ohci_bus_suspend,
121         .bus_resume             = ohci_bus_resume,
122
123         .start_port_reset       = ohci_start_port_reset,
124 };
125
126 static void ssb_ohci_detach(struct ssb_device *dev)
127 {
128         struct usb_hcd *hcd = ssb_get_drvdata(dev);
129
130         usb_remove_hcd(hcd);
131         iounmap(hcd->regs);
132         usb_put_hcd(hcd);
133         ssb_device_disable(dev, 0);
134 }
135
136 static int ssb_ohci_attach(struct ssb_device *dev)
137 {
138         struct ssb_ohci_device *ohcidev;
139         struct usb_hcd *hcd;
140         int err = -ENOMEM;
141         u32 tmp, flags = 0;
142
143         if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV)
144                 flags |= SSB_OHCI_TMSLOW_HOSTMODE;
145
146         ssb_device_enable(dev, flags);
147
148         hcd = usb_create_hcd(&ssb_ohci_hc_driver, dev->dev,
149                         dev->dev->bus_id);
150         if (!hcd)
151                 goto err_dev_disable;
152         ohcidev = hcd_to_ssb_ohci(hcd);
153         ohcidev->enable_flags = flags;
154
155         tmp = ssb_read32(dev, SSB_ADMATCH0);
156         hcd->rsrc_start = ssb_admatch_base(tmp);
157         hcd->rsrc_len = ssb_admatch_size(tmp);
158         hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
159         if (!hcd->regs)
160                 goto err_put_hcd;
161         err = usb_add_hcd(hcd, dev->irq, IRQF_SHARED);
162         if (err)
163                 goto err_iounmap;
164
165         ssb_set_drvdata(dev, hcd);
166
167         return err;
168
169 err_iounmap:
170         iounmap(hcd->regs);
171 err_put_hcd:
172         usb_put_hcd(hcd);
173 err_dev_disable:
174         ssb_device_disable(dev, flags);
175         return err;
176 }
177
178 static int ssb_ohci_probe(struct ssb_device *dev,
179                 const struct ssb_device_id *id)
180 {
181         int err;
182         u16 chipid_top;
183
184         /* USBcores are only connected on embedded devices. */
185         chipid_top = (dev->bus->chip_id & 0xFF00);
186         if (chipid_top != 0x4700 && chipid_top != 0x5300)
187                 return -ENODEV;
188
189         /* TODO: Probably need checks here; is the core connected? */
190
191         if (usb_disabled())
192                 return -ENODEV;
193
194         /* We currently always attach SSB_DEV_USB11_HOSTDEV
195          * as HOST OHCI. If we want to attach it as Client device,
196          * we must branch here and call into the (yet to
197          * be written) Client mode driver. Same for remove(). */
198
199         err = ssb_ohci_attach(dev);
200
201         return err;
202 }
203
204 static void ssb_ohci_remove(struct ssb_device *dev)
205 {
206         ssb_ohci_detach(dev);
207 }
208
209 #ifdef CONFIG_PM
210
211 static int ssb_ohci_suspend(struct ssb_device *dev, pm_message_t state)
212 {
213         ssb_device_disable(dev, 0);
214
215         return 0;
216 }
217
218 static int ssb_ohci_resume(struct ssb_device *dev)
219 {
220         struct usb_hcd *hcd = ssb_get_drvdata(dev);
221         struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
222
223         ssb_device_enable(dev, ohcidev->enable_flags);
224
225         return 0;
226 }
227
228 #else /* !CONFIG_PM */
229 #define ssb_ohci_suspend        NULL
230 #define ssb_ohci_resume NULL
231 #endif /* CONFIG_PM */
232
233 static const struct ssb_device_id ssb_ohci_table[] = {
234         SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOSTDEV, SSB_ANY_REV),
235         SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOST, SSB_ANY_REV),
236         SSB_DEVTABLE_END
237 };
238 MODULE_DEVICE_TABLE(ssb, ssb_ohci_table);
239
240 static struct ssb_driver ssb_ohci_driver = {
241         .name           = KBUILD_MODNAME,
242         .id_table       = ssb_ohci_table,
243         .probe          = ssb_ohci_probe,
244         .remove         = ssb_ohci_remove,
245         .suspend        = ssb_ohci_suspend,
246         .resume         = ssb_ohci_resume,
247 };