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c604e851 MB |
1 | /* |
2 | * Sonics Silicon Backplane | |
3 | * Broadcom USB-core OHCI driver | |
4 | * | |
eb032b98 | 5 | * Copyright 2007 Michael Buesch <m@bues.ch> |
c604e851 MB |
6 | * |
7 | * Derived from the OHCI-PCI driver | |
8 | * Copyright 1999 Roman Weissgaerber | |
9 | * Copyright 2000-2002 David Brownell | |
10 | * Copyright 1999 Linus Torvalds | |
11 | * Copyright 1999 Gregory P. Smith | |
12 | * | |
13 | * Derived from the USBcore related parts of Broadcom-SB | |
14 | * Copyright 2005 Broadcom Corporation | |
15 | * | |
16 | * Licensed under the GNU/GPL. See COPYING for details. | |
17 | */ | |
18 | #include <linux/ssb/ssb.h> | |
19 | ||
20 | ||
21 | #define SSB_OHCI_TMSLOW_HOSTMODE (1 << 29) | |
22 | ||
23 | struct ssb_ohci_device { | |
24 | struct ohci_hcd ohci; /* _must_ be at the beginning. */ | |
25 | ||
26 | u32 enable_flags; | |
27 | }; | |
28 | ||
29 | static inline | |
30 | struct ssb_ohci_device *hcd_to_ssb_ohci(struct usb_hcd *hcd) | |
31 | { | |
32 | return (struct ssb_ohci_device *)(hcd->hcd_priv); | |
33 | } | |
34 | ||
35 | ||
36 | static int ssb_ohci_reset(struct usb_hcd *hcd) | |
37 | { | |
38 | struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd); | |
39 | struct ohci_hcd *ohci = &ohcidev->ohci; | |
40 | int err; | |
41 | ||
42 | ohci_hcd_init(ohci); | |
43 | err = ohci_init(ohci); | |
44 | ||
45 | return err; | |
46 | } | |
47 | ||
48 | static int ssb_ohci_start(struct usb_hcd *hcd) | |
49 | { | |
50 | struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd); | |
51 | struct ohci_hcd *ohci = &ohcidev->ohci; | |
52 | int err; | |
53 | ||
54 | err = ohci_run(ohci); | |
55 | if (err < 0) { | |
56 | ohci_err(ohci, "can't start\n"); | |
57 | ohci_stop(hcd); | |
58 | } | |
59 | ||
60 | return err; | |
61 | } | |
62 | ||
c604e851 MB |
63 | static const struct hc_driver ssb_ohci_hc_driver = { |
64 | .description = "ssb-usb-ohci", | |
65 | .product_desc = "SSB OHCI Controller", | |
66 | .hcd_priv_size = sizeof(struct ssb_ohci_device), | |
67 | ||
68 | .irq = ohci_irq, | |
69 | .flags = HCD_MEMORY | HCD_USB11, | |
70 | ||
71 | .reset = ssb_ohci_reset, | |
72 | .start = ssb_ohci_start, | |
73 | .stop = ohci_stop, | |
74 | .shutdown = ohci_shutdown, | |
75 | ||
c604e851 MB |
76 | .urb_enqueue = ohci_urb_enqueue, |
77 | .urb_dequeue = ohci_urb_dequeue, | |
78 | .endpoint_disable = ohci_endpoint_disable, | |
79 | ||
80 | .get_frame_number = ohci_get_frame, | |
81 | ||
82 | .hub_status_data = ohci_hub_status_data, | |
83 | .hub_control = ohci_hub_control, | |
4735b37c | 84 | #ifdef CONFIG_PM |
c604e851 MB |
85 | .bus_suspend = ohci_bus_suspend, |
86 | .bus_resume = ohci_bus_resume, | |
4735b37c | 87 | #endif |
c604e851 MB |
88 | |
89 | .start_port_reset = ohci_start_port_reset, | |
90 | }; | |
91 | ||
92 | static void ssb_ohci_detach(struct ssb_device *dev) | |
93 | { | |
94 | struct usb_hcd *hcd = ssb_get_drvdata(dev); | |
95 | ||
f2402f21 HM |
96 | if (hcd->driver->shutdown) |
97 | hcd->driver->shutdown(hcd); | |
c604e851 MB |
98 | usb_remove_hcd(hcd); |
99 | iounmap(hcd->regs); | |
f2402f21 | 100 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
c604e851 MB |
101 | usb_put_hcd(hcd); |
102 | ssb_device_disable(dev, 0); | |
103 | } | |
104 | ||
105 | static int ssb_ohci_attach(struct ssb_device *dev) | |
106 | { | |
107 | struct ssb_ohci_device *ohcidev; | |
108 | struct usb_hcd *hcd; | |
109 | int err = -ENOMEM; | |
110 | u32 tmp, flags = 0; | |
111 | ||
f2402f21 HM |
112 | if (dma_set_mask(dev->dma_dev, DMA_BIT_MASK(32)) || |
113 | dma_set_coherent_mask(dev->dma_dev, DMA_BIT_MASK(32))) | |
114 | return -EOPNOTSUPP; | |
c604e851 | 115 | |
f2402f21 HM |
116 | if (dev->id.coreid == SSB_DEV_USB11_HOSTDEV) { |
117 | /* Put the device into host-mode. */ | |
118 | flags |= SSB_OHCI_TMSLOW_HOSTMODE; | |
119 | ssb_device_enable(dev, flags); | |
120 | } else if (dev->id.coreid == SSB_DEV_USB20_HOST) { | |
121 | /* | |
122 | * USB 2.0 special considerations: | |
123 | * | |
124 | * In addition to the standard SSB reset sequence, the Host | |
125 | * Control Register must be programmed to bring the USB core | |
126 | * and various phy components out of reset. | |
127 | */ | |
128 | ssb_device_enable(dev, 0); | |
129 | ssb_write32(dev, 0x200, 0x7ff); | |
130 | ||
131 | /* Change Flush control reg */ | |
132 | tmp = ssb_read32(dev, 0x400); | |
133 | tmp &= ~8; | |
134 | ssb_write32(dev, 0x400, tmp); | |
135 | tmp = ssb_read32(dev, 0x400); | |
136 | ||
137 | /* Change Shim control reg */ | |
138 | tmp = ssb_read32(dev, 0x304); | |
139 | tmp &= ~0x100; | |
140 | ssb_write32(dev, 0x304, tmp); | |
141 | tmp = ssb_read32(dev, 0x304); | |
142 | ||
143 | udelay(1); | |
144 | ||
145 | /* Work around for 5354 failures */ | |
146 | if (dev->id.revision == 2 && dev->bus->chip_id == 0x5354) { | |
147 | /* Change syn01 reg */ | |
148 | tmp = 0x00fe00fe; | |
149 | ssb_write32(dev, 0x894, tmp); | |
150 | ||
151 | /* Change syn03 reg */ | |
152 | tmp = ssb_read32(dev, 0x89c); | |
153 | tmp |= 0x1; | |
154 | ssb_write32(dev, 0x89c, tmp); | |
155 | } | |
156 | } else | |
157 | ssb_device_enable(dev, 0); | |
c604e851 MB |
158 | |
159 | hcd = usb_create_hcd(&ssb_ohci_hc_driver, dev->dev, | |
7071a3ce | 160 | dev_name(dev->dev)); |
c604e851 MB |
161 | if (!hcd) |
162 | goto err_dev_disable; | |
163 | ohcidev = hcd_to_ssb_ohci(hcd); | |
164 | ohcidev->enable_flags = flags; | |
165 | ||
166 | tmp = ssb_read32(dev, SSB_ADMATCH0); | |
167 | hcd->rsrc_start = ssb_admatch_base(tmp); | |
168 | hcd->rsrc_len = ssb_admatch_size(tmp); | |
169 | hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len); | |
170 | if (!hcd->regs) | |
171 | goto err_put_hcd; | |
442258e2 | 172 | err = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED); |
c604e851 MB |
173 | if (err) |
174 | goto err_iounmap; | |
175 | ||
176 | ssb_set_drvdata(dev, hcd); | |
177 | ||
178 | return err; | |
179 | ||
180 | err_iounmap: | |
181 | iounmap(hcd->regs); | |
182 | err_put_hcd: | |
183 | usb_put_hcd(hcd); | |
184 | err_dev_disable: | |
185 | ssb_device_disable(dev, flags); | |
186 | return err; | |
187 | } | |
188 | ||
189 | static int ssb_ohci_probe(struct ssb_device *dev, | |
190 | const struct ssb_device_id *id) | |
191 | { | |
192 | int err; | |
193 | u16 chipid_top; | |
194 | ||
195 | /* USBcores are only connected on embedded devices. */ | |
196 | chipid_top = (dev->bus->chip_id & 0xFF00); | |
197 | if (chipid_top != 0x4700 && chipid_top != 0x5300) | |
198 | return -ENODEV; | |
199 | ||
200 | /* TODO: Probably need checks here; is the core connected? */ | |
201 | ||
202 | if (usb_disabled()) | |
203 | return -ENODEV; | |
204 | ||
205 | /* We currently always attach SSB_DEV_USB11_HOSTDEV | |
206 | * as HOST OHCI. If we want to attach it as Client device, | |
207 | * we must branch here and call into the (yet to | |
208 | * be written) Client mode driver. Same for remove(). */ | |
209 | ||
210 | err = ssb_ohci_attach(dev); | |
211 | ||
212 | return err; | |
213 | } | |
214 | ||
215 | static void ssb_ohci_remove(struct ssb_device *dev) | |
216 | { | |
217 | ssb_ohci_detach(dev); | |
218 | } | |
219 | ||
220 | #ifdef CONFIG_PM | |
221 | ||
222 | static int ssb_ohci_suspend(struct ssb_device *dev, pm_message_t state) | |
223 | { | |
224 | ssb_device_disable(dev, 0); | |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
229 | static int ssb_ohci_resume(struct ssb_device *dev) | |
230 | { | |
231 | struct usb_hcd *hcd = ssb_get_drvdata(dev); | |
232 | struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd); | |
233 | ||
234 | ssb_device_enable(dev, ohcidev->enable_flags); | |
235 | ||
43bbb7e0 | 236 | ohci_finish_controller_resume(hcd); |
c604e851 MB |
237 | return 0; |
238 | } | |
239 | ||
240 | #else /* !CONFIG_PM */ | |
241 | #define ssb_ohci_suspend NULL | |
242 | #define ssb_ohci_resume NULL | |
243 | #endif /* CONFIG_PM */ | |
244 | ||
245 | static const struct ssb_device_id ssb_ohci_table[] = { | |
246 | SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOSTDEV, SSB_ANY_REV), | |
247 | SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB11_HOST, SSB_ANY_REV), | |
f2402f21 | 248 | SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB20_HOST, SSB_ANY_REV), |
c604e851 MB |
249 | SSB_DEVTABLE_END |
250 | }; | |
251 | MODULE_DEVICE_TABLE(ssb, ssb_ohci_table); | |
252 | ||
253 | static struct ssb_driver ssb_ohci_driver = { | |
254 | .name = KBUILD_MODNAME, | |
255 | .id_table = ssb_ohci_table, | |
256 | .probe = ssb_ohci_probe, | |
257 | .remove = ssb_ohci_remove, | |
258 | .suspend = ssb_ohci_suspend, | |
259 | .resume = ssb_ohci_resume, | |
260 | }; |