1// SPDX-License-Identifier: GPL-2.0
2/*
3 *  PS3 OHCI Host Controller driver
4 *
5 *  Copyright (C) 2006 Sony Computer Entertainment Inc.
6 *  Copyright 2006 Sony Corp.
7 */
8
9#include <asm/firmware.h>
10#include <asm/ps3.h>
11
12static int ps3_ohci_hc_reset(struct usb_hcd *hcd)
13{
14	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
15
16	ohci->flags |= OHCI_QUIRK_BE_MMIO;
17	ohci_hcd_init(ohci);
18	return ohci_init(ohci);
19}
20
21static int ps3_ohci_hc_start(struct usb_hcd *hcd)
22{
23	int result;
24	struct ohci_hcd *ohci = hcd_to_ohci(hcd);
25
26	/* Handle root hub init quirk in spider south bridge. */
27	/* Also set PwrOn2PwrGood to 0x7f (254ms). */
28
29	ohci_writel(ohci, 0x7f000000 | RH_A_PSM | RH_A_OCPM,
30		&ohci->regs->roothub.a);
31	ohci_writel(ohci, 0x00060000, &ohci->regs->roothub.b);
32
33	result = ohci_run(ohci);
34
35	if (result < 0) {
36		dev_err(hcd->self.controller, "can't start %s\n",
37			hcd->self.bus_name);
38		ohci_stop(hcd);
39	}
40
41	return result;
42}
43
44static const struct hc_driver ps3_ohci_hc_driver = {
45	.description		= hcd_name,
46	.product_desc		= "PS3 OHCI Host Controller",
47	.hcd_priv_size		= sizeof(struct ohci_hcd),
48	.irq			= ohci_irq,
49	.flags			= HCD_MEMORY | HCD_DMA | HCD_USB11,
50	.reset			= ps3_ohci_hc_reset,
51	.start			= ps3_ohci_hc_start,
52	.stop			= ohci_stop,
53	.shutdown		= ohci_shutdown,
54	.urb_enqueue		= ohci_urb_enqueue,
55	.urb_dequeue		= ohci_urb_dequeue,
56	.endpoint_disable	= ohci_endpoint_disable,
57	.get_frame_number	= ohci_get_frame,
58	.hub_status_data	= ohci_hub_status_data,
59	.hub_control		= ohci_hub_control,
60	.start_port_reset	= ohci_start_port_reset,
61#if defined(CONFIG_PM)
62	.bus_suspend 		= ohci_bus_suspend,
63	.bus_resume 		= ohci_bus_resume,
64#endif
65};
66
67static int ps3_ohci_probe(struct ps3_system_bus_device *dev)
68{
69	int result;
70	struct usb_hcd *hcd;
71	unsigned int virq;
72	static u64 dummy_mask;
73
74	if (usb_disabled()) {
75		result = -ENODEV;
76		goto fail_start;
77	}
78
79	result = ps3_open_hv_device(dev);
80
81	if (result) {
82		dev_dbg(&dev->core, "%s:%d: ps3_open_hv_device failed: %s\n",
83			__func__, __LINE__, ps3_result(result));
84		result = -EPERM;
85		goto fail_open;
86	}
87
88	result = ps3_dma_region_create(dev->d_region);
89
90	if (result) {
91		dev_dbg(&dev->core, "%s:%d: ps3_dma_region_create failed: "
92			"(%d)\n", __func__, __LINE__, result);
93		BUG_ON("check region type");
94		goto fail_dma_region;
95	}
96
97	result = ps3_mmio_region_create(dev->m_region);
98
99	if (result) {
100		dev_dbg(&dev->core, "%s:%d: ps3_map_mmio_region failed\n",
101			__func__, __LINE__);
102		result = -EPERM;
103		goto fail_mmio_region;
104	}
105
106	dev_dbg(&dev->core, "%s:%d: mmio mapped_addr %lxh\n", __func__,
107		__LINE__, dev->m_region->lpar_addr);
108
109	result = ps3_io_irq_setup(PS3_BINDING_CPU_ANY, dev->interrupt_id, &virq);
110
111	if (result) {
112		dev_dbg(&dev->core, "%s:%d: ps3_construct_io_irq(%d) failed.\n",
113			__func__, __LINE__, virq);
114		result = -EPERM;
115		goto fail_irq;
116	}
117
118	dummy_mask = DMA_BIT_MASK(32);
119	dev->core.dma_mask = &dummy_mask;
120	dma_set_coherent_mask(&dev->core, dummy_mask);
121
122	hcd = usb_create_hcd(&ps3_ohci_hc_driver, &dev->core, dev_name(&dev->core));
123
124	if (!hcd) {
125		dev_dbg(&dev->core, "%s:%d: usb_create_hcd failed\n", __func__,
126			__LINE__);
127		result = -ENOMEM;
128		goto fail_create_hcd;
129	}
130
131	hcd->rsrc_start = dev->m_region->lpar_addr;
132	hcd->rsrc_len = dev->m_region->len;
133
134	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name))
135		dev_dbg(&dev->core, "%s:%d: request_mem_region failed\n",
136			__func__, __LINE__);
137
138	hcd->regs = ioremap(dev->m_region->lpar_addr, dev->m_region->len);
139
140	if (!hcd->regs) {
141		dev_dbg(&dev->core, "%s:%d: ioremap failed\n", __func__,
142			__LINE__);
143		result = -EPERM;
144		goto fail_ioremap;
145	}
146
147	dev_dbg(&dev->core, "%s:%d: hcd->rsrc_start %lxh\n", __func__, __LINE__,
148		(unsigned long)hcd->rsrc_start);
149	dev_dbg(&dev->core, "%s:%d: hcd->rsrc_len   %lxh\n", __func__, __LINE__,
150		(unsigned long)hcd->rsrc_len);
151	dev_dbg(&dev->core, "%s:%d: hcd->regs       %lxh\n", __func__, __LINE__,
152		(unsigned long)hcd->regs);
153	dev_dbg(&dev->core, "%s:%d: virq            %lu\n", __func__, __LINE__,
154		(unsigned long)virq);
155
156	ps3_system_bus_set_drvdata(dev, hcd);
157
158	result = usb_add_hcd(hcd, virq, 0);
159
160	if (result) {
161		dev_dbg(&dev->core, "%s:%d: usb_add_hcd failed (%d)\n",
162			__func__, __LINE__, result);
163		goto fail_add_hcd;
164	}
165
166	device_wakeup_enable(hcd->self.controller);
167	return result;
168
169fail_add_hcd:
170	iounmap(hcd->regs);
171fail_ioremap:
172	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
173	usb_put_hcd(hcd);
174fail_create_hcd:
175	ps3_io_irq_destroy(virq);
176fail_irq:
177	ps3_free_mmio_region(dev->m_region);
178fail_mmio_region:
179	ps3_dma_region_free(dev->d_region);
180fail_dma_region:
181	ps3_close_hv_device(dev);
182fail_open:
183fail_start:
184	return result;
185}
186
187static void ps3_ohci_remove(struct ps3_system_bus_device *dev)
188{
189	unsigned int tmp;
190	struct usb_hcd *hcd = ps3_system_bus_get_drvdata(dev);
191
192	BUG_ON(!hcd);
193
194	dev_dbg(&dev->core, "%s:%d: regs %p\n", __func__, __LINE__, hcd->regs);
195	dev_dbg(&dev->core, "%s:%d: irq %u\n", __func__, __LINE__, hcd->irq);
196
197	tmp = hcd->irq;
198
199	ohci_shutdown(hcd);
200	usb_remove_hcd(hcd);
201
202	ps3_system_bus_set_drvdata(dev, NULL);
203
204	BUG_ON(!hcd->regs);
205	iounmap(hcd->regs);
206
207	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
208	usb_put_hcd(hcd);
209
210	ps3_io_irq_destroy(tmp);
211	ps3_free_mmio_region(dev->m_region);
212
213	ps3_dma_region_free(dev->d_region);
214	ps3_close_hv_device(dev);
215}
216
217static int __init ps3_ohci_driver_register(struct ps3_system_bus_driver *drv)
218{
219	return firmware_has_feature(FW_FEATURE_PS3_LV1)
220		? ps3_system_bus_driver_register(drv)
221		: 0;
222}
223
224static void ps3_ohci_driver_unregister(struct ps3_system_bus_driver *drv)
225{
226	if (firmware_has_feature(FW_FEATURE_PS3_LV1))
227		ps3_system_bus_driver_unregister(drv);
228}
229
230MODULE_ALIAS(PS3_MODULE_ALIAS_OHCI);
231
232static struct ps3_system_bus_driver ps3_ohci_driver = {
233	.core.name = "ps3-ohci-driver",
234	.core.owner = THIS_MODULE,
235	.match_id = PS3_MATCH_ID_OHCI,
236	.probe = ps3_ohci_probe,
237	.remove = ps3_ohci_remove,
238	.shutdown = ps3_ohci_remove,
239};
240