1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * PS3 EHCI 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_ehci_setup_insnreg(struct ehci_hcd * ehci)12 static void ps3_ehci_setup_insnreg(struct ehci_hcd *ehci)
13 {
14 /* PS3 HC internal setup register offsets. */
15
16 enum ps3_ehci_hc_insnreg {
17 ps3_ehci_hc_insnreg01 = 0x084,
18 ps3_ehci_hc_insnreg02 = 0x088,
19 ps3_ehci_hc_insnreg03 = 0x08c,
20 };
21
22 /* PS3 EHCI HC errata fix 316 - The PS3 EHCI HC will reset its
23 * internal INSNREGXX setup regs back to the chip default values
24 * on Host Controller Reset (CMD_RESET) or Light Host Controller
25 * Reset (CMD_LRESET). The work-around for this is for the HC
26 * driver to re-initialise these regs when ever the HC is reset.
27 */
28
29 /* Set burst transfer counts to 256 out, 32 in. */
30
31 writel_be(0x01000020, (void __iomem *)ehci->regs +
32 ps3_ehci_hc_insnreg01);
33
34 /* Enable burst transfer counts. */
35
36 writel_be(0x00000001, (void __iomem *)ehci->regs +
37 ps3_ehci_hc_insnreg03);
38 }
39
ps3_ehci_hc_reset(struct usb_hcd * hcd)40 static int ps3_ehci_hc_reset(struct usb_hcd *hcd)
41 {
42 int result;
43 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
44
45 ehci->big_endian_mmio = 1;
46 ehci->caps = hcd->regs;
47
48 result = ehci_setup(hcd);
49 if (result)
50 return result;
51
52 ps3_ehci_setup_insnreg(ehci);
53
54 return result;
55 }
56
57 static const struct hc_driver ps3_ehci_hc_driver = {
58 .description = hcd_name,
59 .product_desc = "PS3 EHCI Host Controller",
60 .hcd_priv_size = sizeof(struct ehci_hcd),
61 .irq = ehci_irq,
62 .flags = HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
63 .reset = ps3_ehci_hc_reset,
64 .start = ehci_run,
65 .stop = ehci_stop,
66 .shutdown = ehci_shutdown,
67 .urb_enqueue = ehci_urb_enqueue,
68 .urb_dequeue = ehci_urb_dequeue,
69 .endpoint_disable = ehci_endpoint_disable,
70 .endpoint_reset = ehci_endpoint_reset,
71 .get_frame_number = ehci_get_frame,
72 .hub_status_data = ehci_hub_status_data,
73 .hub_control = ehci_hub_control,
74 #if defined(CONFIG_PM)
75 .bus_suspend = ehci_bus_suspend,
76 .bus_resume = ehci_bus_resume,
77 #endif
78 .relinquish_port = ehci_relinquish_port,
79 .port_handed_over = ehci_port_handed_over,
80
81 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
82 };
83
ps3_ehci_probe(struct ps3_system_bus_device * dev)84 static int ps3_ehci_probe(struct ps3_system_bus_device *dev)
85 {
86 int result;
87 struct usb_hcd *hcd;
88 unsigned int virq;
89 static u64 dummy_mask;
90
91 if (usb_disabled()) {
92 result = -ENODEV;
93 goto fail_start;
94 }
95
96 result = ps3_open_hv_device(dev);
97
98 if (result) {
99 dev_dbg(&dev->core, "%s:%d: ps3_open_hv_device failed\n",
100 __func__, __LINE__);
101 goto fail_open;
102 }
103
104 result = ps3_dma_region_create(dev->d_region);
105
106 if (result) {
107 dev_dbg(&dev->core, "%s:%d: ps3_dma_region_create failed: "
108 "(%d)\n", __func__, __LINE__, result);
109 BUG_ON("check region type");
110 goto fail_dma_region;
111 }
112
113 result = ps3_mmio_region_create(dev->m_region);
114
115 if (result) {
116 dev_dbg(&dev->core, "%s:%d: ps3_map_mmio_region failed\n",
117 __func__, __LINE__);
118 result = -EPERM;
119 goto fail_mmio_region;
120 }
121
122 dev_dbg(&dev->core, "%s:%d: mmio mapped_addr %lxh\n", __func__,
123 __LINE__, dev->m_region->lpar_addr);
124
125 result = ps3_io_irq_setup(PS3_BINDING_CPU_ANY, dev->interrupt_id, &virq);
126
127 if (result) {
128 dev_dbg(&dev->core, "%s:%d: ps3_construct_io_irq(%d) failed.\n",
129 __func__, __LINE__, virq);
130 result = -EPERM;
131 goto fail_irq;
132 }
133
134 dummy_mask = DMA_BIT_MASK(32);
135 dev->core.dma_mask = &dummy_mask;
136 dma_set_coherent_mask(&dev->core, dummy_mask);
137
138 hcd = usb_create_hcd(&ps3_ehci_hc_driver, &dev->core, dev_name(&dev->core));
139
140 if (!hcd) {
141 dev_dbg(&dev->core, "%s:%d: usb_create_hcd failed\n", __func__,
142 __LINE__);
143 result = -ENOMEM;
144 goto fail_create_hcd;
145 }
146
147 hcd->rsrc_start = dev->m_region->lpar_addr;
148 hcd->rsrc_len = dev->m_region->len;
149
150 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name))
151 dev_dbg(&dev->core, "%s:%d: request_mem_region failed\n",
152 __func__, __LINE__);
153
154 hcd->regs = ioremap(dev->m_region->lpar_addr, dev->m_region->len);
155
156 if (!hcd->regs) {
157 dev_dbg(&dev->core, "%s:%d: ioremap failed\n", __func__,
158 __LINE__);
159 result = -EPERM;
160 goto fail_ioremap;
161 }
162
163 dev_dbg(&dev->core, "%s:%d: hcd->rsrc_start %lxh\n", __func__, __LINE__,
164 (unsigned long)hcd->rsrc_start);
165 dev_dbg(&dev->core, "%s:%d: hcd->rsrc_len %lxh\n", __func__, __LINE__,
166 (unsigned long)hcd->rsrc_len);
167 dev_dbg(&dev->core, "%s:%d: hcd->regs %lxh\n", __func__, __LINE__,
168 (unsigned long)hcd->regs);
169 dev_dbg(&dev->core, "%s:%d: virq %lu\n", __func__, __LINE__,
170 (unsigned long)virq);
171
172 ps3_system_bus_set_drvdata(dev, hcd);
173
174 result = usb_add_hcd(hcd, virq, 0);
175
176 if (result) {
177 dev_dbg(&dev->core, "%s:%d: usb_add_hcd failed (%d)\n",
178 __func__, __LINE__, result);
179 goto fail_add_hcd;
180 }
181
182 device_wakeup_enable(hcd->self.controller);
183 return result;
184
185 fail_add_hcd:
186 iounmap(hcd->regs);
187 fail_ioremap:
188 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
189 usb_put_hcd(hcd);
190 fail_create_hcd:
191 ps3_io_irq_destroy(virq);
192 fail_irq:
193 ps3_free_mmio_region(dev->m_region);
194 fail_mmio_region:
195 ps3_dma_region_free(dev->d_region);
196 fail_dma_region:
197 ps3_close_hv_device(dev);
198 fail_open:
199 fail_start:
200 return result;
201 }
202
ps3_ehci_remove(struct ps3_system_bus_device * dev)203 static void ps3_ehci_remove(struct ps3_system_bus_device *dev)
204 {
205 unsigned int tmp;
206 struct usb_hcd *hcd = ps3_system_bus_get_drvdata(dev);
207
208 BUG_ON(!hcd);
209
210 dev_dbg(&dev->core, "%s:%d: regs %p\n", __func__, __LINE__, hcd->regs);
211 dev_dbg(&dev->core, "%s:%d: irq %u\n", __func__, __LINE__, hcd->irq);
212
213 tmp = hcd->irq;
214
215 usb_remove_hcd(hcd);
216
217 ps3_system_bus_set_drvdata(dev, NULL);
218
219 BUG_ON(!hcd->regs);
220 iounmap(hcd->regs);
221
222 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
223 usb_put_hcd(hcd);
224
225 ps3_io_irq_destroy(tmp);
226 ps3_free_mmio_region(dev->m_region);
227
228 ps3_dma_region_free(dev->d_region);
229 ps3_close_hv_device(dev);
230 }
231
ps3_ehci_driver_register(struct ps3_system_bus_driver * drv)232 static int __init ps3_ehci_driver_register(struct ps3_system_bus_driver *drv)
233 {
234 return firmware_has_feature(FW_FEATURE_PS3_LV1)
235 ? ps3_system_bus_driver_register(drv)
236 : 0;
237 }
238
ps3_ehci_driver_unregister(struct ps3_system_bus_driver * drv)239 static void ps3_ehci_driver_unregister(struct ps3_system_bus_driver *drv)
240 {
241 if (firmware_has_feature(FW_FEATURE_PS3_LV1))
242 ps3_system_bus_driver_unregister(drv);
243 }
244
245 MODULE_ALIAS(PS3_MODULE_ALIAS_EHCI);
246
247 static struct ps3_system_bus_driver ps3_ehci_driver = {
248 .core.name = "ps3-ehci-driver",
249 .core.owner = THIS_MODULE,
250 .match_id = PS3_MATCH_ID_EHCI,
251 .probe = ps3_ehci_probe,
252 .remove = ps3_ehci_remove,
253 .shutdown = ps3_ehci_remove,
254 };
255