sc92031: add a link to the datasheet
[linux-2.6] / drivers / usb / host / ohci-ps3.c
1 /*
2  *  PS3 OHCI Host Controller driver
3  *
4  *  Copyright (C) 2006 Sony Computer Entertainment Inc.
5  *  Copyright 2006 Sony Corp.
6  *
7  *  This program is free software; you can redistribute it and/or modify
8  *  it under the terms of the GNU General Public License as published by
9  *  the Free Software Foundation; version 2 of the License.
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *  GNU General Public License for more details.
15  *
16  *  You should have received a copy of the GNU General Public License
17  *  along with this program; if not, write to the Free Software
18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19  */
20
21 #include <asm/firmware.h>
22 #include <asm/ps3.h>
23
24 static int ps3_ohci_hc_reset(struct usb_hcd *hcd)
25 {
26         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
27
28         ohci->flags |= OHCI_QUIRK_BE_MMIO;
29         ohci_hcd_init(ohci);
30         return ohci_init(ohci);
31 }
32
33 static int __devinit ps3_ohci_hc_start(struct usb_hcd *hcd)
34 {
35         int result;
36         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
37
38         /* Handle root hub init quirk in spider south bridge. */
39         /* Also set PwrOn2PwrGood to 0x7f (254ms). */
40
41         ohci_writel(ohci, 0x7f000000 | RH_A_PSM | RH_A_OCPM,
42                 &ohci->regs->roothub.a);
43         ohci_writel(ohci, 0x00060000, &ohci->regs->roothub.b);
44
45         result = ohci_run(ohci);
46
47         if (result < 0) {
48                 err("can't start %s", hcd->self.bus_name);
49                 ohci_stop(hcd);
50         }
51
52         return result;
53 }
54
55 static const struct hc_driver ps3_ohci_hc_driver = {
56         .description            = hcd_name,
57         .product_desc           = "PS3 OHCI Host Controller",
58         .hcd_priv_size          = sizeof(struct ohci_hcd),
59         .irq                    = ohci_irq,
60         .flags                  = HCD_MEMORY | HCD_USB11,
61         .reset                  = ps3_ohci_hc_reset,
62         .start                  = ps3_ohci_hc_start,
63         .stop                   = ohci_stop,
64         .shutdown               = ohci_shutdown,
65         .urb_enqueue            = ohci_urb_enqueue,
66         .urb_dequeue            = ohci_urb_dequeue,
67         .endpoint_disable       = ohci_endpoint_disable,
68         .get_frame_number       = ohci_get_frame,
69         .hub_status_data        = ohci_hub_status_data,
70         .hub_control            = ohci_hub_control,
71         .start_port_reset       = ohci_start_port_reset,
72 #if defined(CONFIG_PM)
73         .bus_suspend            = ohci_bus_suspend,
74         .bus_resume             = ohci_bus_resume,
75 #endif
76 };
77
78 static int ps3_ohci_probe(struct ps3_system_bus_device *dev)
79 {
80         int result;
81         struct usb_hcd *hcd;
82         unsigned int virq;
83         static u64 dummy_mask = DMA_32BIT_MASK;
84
85         if (usb_disabled()) {
86                 result = -ENODEV;
87                 goto fail_start;
88         }
89
90         result = ps3_open_hv_device(dev);
91
92         if (result) {
93                 dev_dbg(&dev->core, "%s:%d: ps3_open_hv_device failed: %s\n",
94                         __func__, __LINE__, ps3_result(result));
95                 result = -EPERM;
96                 goto fail_open;
97         }
98
99         result = ps3_dma_region_create(dev->d_region);
100
101         if (result) {
102                 dev_dbg(&dev->core, "%s:%d: ps3_dma_region_create failed: "
103                         "(%d)\n", __func__, __LINE__, result);
104                 BUG_ON("check region type");
105                 goto fail_dma_region;
106         }
107
108         result = ps3_mmio_region_create(dev->m_region);
109
110         if (result) {
111                 dev_dbg(&dev->core, "%s:%d: ps3_map_mmio_region failed\n",
112                         __func__, __LINE__);
113                 result = -EPERM;
114                 goto fail_mmio_region;
115         }
116
117         dev_dbg(&dev->core, "%s:%d: mmio mapped_addr %lxh\n", __func__,
118                 __LINE__, dev->m_region->lpar_addr);
119
120         result = ps3_io_irq_setup(PS3_BINDING_CPU_ANY, dev->interrupt_id, &virq);
121
122         if (result) {
123                 dev_dbg(&dev->core, "%s:%d: ps3_construct_io_irq(%d) failed.\n",
124                         __func__, __LINE__, virq);
125                 result = -EPERM;
126                 goto fail_irq;
127         }
128
129         dev->core.dma_mask = &dummy_mask; /* FIXME: for improper usb code */
130
131         hcd = usb_create_hcd(&ps3_ohci_hc_driver, &dev->core, dev_name(&dev->core));
132
133         if (!hcd) {
134                 dev_dbg(&dev->core, "%s:%d: usb_create_hcd failed\n", __func__,
135                         __LINE__);
136                 result = -ENOMEM;
137                 goto fail_create_hcd;
138         }
139
140         hcd->rsrc_start = dev->m_region->lpar_addr;
141         hcd->rsrc_len = dev->m_region->len;
142
143         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name))
144                 dev_dbg(&dev->core, "%s:%d: request_mem_region failed\n",
145                         __func__, __LINE__);
146
147         hcd->regs = ioremap(dev->m_region->lpar_addr, dev->m_region->len);
148
149         if (!hcd->regs) {
150                 dev_dbg(&dev->core, "%s:%d: ioremap failed\n", __func__,
151                         __LINE__);
152                 result = -EPERM;
153                 goto fail_ioremap;
154         }
155
156         dev_dbg(&dev->core, "%s:%d: hcd->rsrc_start %lxh\n", __func__, __LINE__,
157                 (unsigned long)hcd->rsrc_start);
158         dev_dbg(&dev->core, "%s:%d: hcd->rsrc_len   %lxh\n", __func__, __LINE__,
159                 (unsigned long)hcd->rsrc_len);
160         dev_dbg(&dev->core, "%s:%d: hcd->regs       %lxh\n", __func__, __LINE__,
161                 (unsigned long)hcd->regs);
162         dev_dbg(&dev->core, "%s:%d: virq            %lu\n", __func__, __LINE__,
163                 (unsigned long)virq);
164
165         ps3_system_bus_set_driver_data(dev, hcd);
166
167         result = usb_add_hcd(hcd, virq, IRQF_DISABLED);
168
169         if (result) {
170                 dev_dbg(&dev->core, "%s:%d: usb_add_hcd failed (%d)\n",
171                         __func__, __LINE__, result);
172                 goto fail_add_hcd;
173         }
174
175         return result;
176
177 fail_add_hcd:
178         iounmap(hcd->regs);
179 fail_ioremap:
180         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
181         usb_put_hcd(hcd);
182 fail_create_hcd:
183         ps3_io_irq_destroy(virq);
184 fail_irq:
185         ps3_free_mmio_region(dev->m_region);
186 fail_mmio_region:
187         ps3_dma_region_free(dev->d_region);
188 fail_dma_region:
189         ps3_close_hv_device(dev);
190 fail_open:
191 fail_start:
192         return result;
193 }
194
195 static int ps3_ohci_remove(struct ps3_system_bus_device *dev)
196 {
197         unsigned int tmp;
198         struct usb_hcd *hcd =
199                 (struct usb_hcd *)ps3_system_bus_get_driver_data(dev);
200
201         BUG_ON(!hcd);
202
203         dev_dbg(&dev->core, "%s:%d: regs %p\n", __func__, __LINE__, hcd->regs);
204         dev_dbg(&dev->core, "%s:%d: irq %u\n", __func__, __LINE__, hcd->irq);
205
206         tmp = hcd->irq;
207
208         ohci_shutdown(hcd);
209         usb_remove_hcd(hcd);
210
211         ps3_system_bus_set_driver_data(dev, NULL);
212
213         BUG_ON(!hcd->regs);
214         iounmap(hcd->regs);
215
216         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
217         usb_put_hcd(hcd);
218
219         ps3_io_irq_destroy(tmp);
220         ps3_free_mmio_region(dev->m_region);
221
222         ps3_dma_region_free(dev->d_region);
223         ps3_close_hv_device(dev);
224
225         return 0;
226 }
227
228 static int ps3_ohci_driver_register(struct ps3_system_bus_driver *drv)
229 {
230         return firmware_has_feature(FW_FEATURE_PS3_LV1)
231                 ? ps3_system_bus_driver_register(drv)
232                 : 0;
233 }
234
235 static void ps3_ohci_driver_unregister(struct ps3_system_bus_driver *drv)
236 {
237         if (firmware_has_feature(FW_FEATURE_PS3_LV1))
238                 ps3_system_bus_driver_unregister(drv);
239 }
240
241 MODULE_ALIAS(PS3_MODULE_ALIAS_OHCI);
242
243 static struct ps3_system_bus_driver ps3_ohci_driver = {
244         .core.name = "ps3-ohci-driver",
245         .core.owner = THIS_MODULE,
246         .match_id = PS3_MATCH_ID_OHCI,
247         .probe = ps3_ohci_probe,
248         .remove = ps3_ohci_remove,
249         .shutdown = ps3_ohci_remove,
250 };