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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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 | |