xref: /openbmc/linux/drivers/usb/host/ohci-ps3.c (revision b6dcefde)
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 __devinit 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_BIT_MASK(32);
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_drvdata(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 = ps3_system_bus_get_drvdata(dev);
199 
200 	BUG_ON(!hcd);
201 
202 	dev_dbg(&dev->core, "%s:%d: regs %p\n", __func__, __LINE__, hcd->regs);
203 	dev_dbg(&dev->core, "%s:%d: irq %u\n", __func__, __LINE__, hcd->irq);
204 
205 	tmp = hcd->irq;
206 
207 	ohci_shutdown(hcd);
208 	usb_remove_hcd(hcd);
209 
210 	ps3_system_bus_set_drvdata(dev, NULL);
211 
212 	BUG_ON(!hcd->regs);
213 	iounmap(hcd->regs);
214 
215 	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
216 	usb_put_hcd(hcd);
217 
218 	ps3_io_irq_destroy(tmp);
219 	ps3_free_mmio_region(dev->m_region);
220 
221 	ps3_dma_region_free(dev->d_region);
222 	ps3_close_hv_device(dev);
223 
224 	return 0;
225 }
226 
227 static int __init ps3_ohci_driver_register(struct ps3_system_bus_driver *drv)
228 {
229 	return firmware_has_feature(FW_FEATURE_PS3_LV1)
230 		? ps3_system_bus_driver_register(drv)
231 		: 0;
232 }
233 
234 static void ps3_ohci_driver_unregister(struct ps3_system_bus_driver *drv)
235 {
236 	if (firmware_has_feature(FW_FEATURE_PS3_LV1))
237 		ps3_system_bus_driver_unregister(drv);
238 }
239 
240 MODULE_ALIAS(PS3_MODULE_ALIAS_OHCI);
241 
242 static struct ps3_system_bus_driver ps3_ohci_driver = {
243 	.core.name = "ps3-ohci-driver",
244 	.core.owner = THIS_MODULE,
245 	.match_id = PS3_MATCH_ID_OHCI,
246 	.probe = ps3_ohci_probe,
247 	.remove = ps3_ohci_remove,
248 	.shutdown = ps3_ohci_remove,
249 };
250