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 
ps3_ohci_hc_reset(struct usb_hcd * hcd)12 static 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 
ps3_ohci_hc_start(struct usb_hcd * hcd)21 static 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 
44 static 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 
ps3_ohci_probe(struct ps3_system_bus_device * dev)67 static 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 
169 fail_add_hcd:
170 	iounmap(hcd->regs);
171 fail_ioremap:
172 	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
173 	usb_put_hcd(hcd);
174 fail_create_hcd:
175 	ps3_io_irq_destroy(virq);
176 fail_irq:
177 	ps3_free_mmio_region(dev->m_region);
178 fail_mmio_region:
179 	ps3_dma_region_free(dev->d_region);
180 fail_dma_region:
181 	ps3_close_hv_device(dev);
182 fail_open:
183 fail_start:
184 	return result;
185 }
186 
ps3_ohci_remove(struct ps3_system_bus_device * dev)187 static 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 
ps3_ohci_driver_register(struct ps3_system_bus_driver * drv)217 static 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 
ps3_ohci_driver_unregister(struct ps3_system_bus_driver * drv)224 static 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 
230 MODULE_ALIAS(PS3_MODULE_ALIAS_OHCI);
231 
232 static 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