]>
Commit | Line | Data |
---|---|---|
7a7a4a59 HM |
1 | /* |
2 | * Generic platform ehci driver | |
3 | * | |
4 | * Copyright 2007 Steven Brown <sbrown@cortland.com> | |
5 | * Copyright 2010-2012 Hauke Mehrtens <hauke@hauke-m.de> | |
6 | * | |
7 | * Derived from the ohci-ssb driver | |
8 | * Copyright 2007 Michael Buesch <m@bues.ch> | |
9 | * | |
10 | * Derived from the EHCI-PCI driver | |
11 | * Copyright (c) 2000-2004 by David Brownell | |
12 | * | |
13 | * Derived from the ohci-pci driver | |
14 | * Copyright 1999 Roman Weissgaerber | |
15 | * Copyright 2000-2002 David Brownell | |
16 | * Copyright 1999 Linus Torvalds | |
17 | * Copyright 1999 Gregory P. Smith | |
18 | * | |
19 | * Licensed under the GNU/GPL. See COPYING for details. | |
20 | */ | |
f3bc64d6 | 21 | #include <linux/dma-mapping.h> |
148e1134 | 22 | #include <linux/err.h> |
99f91934 | 23 | #include <linux/kernel.h> |
d1bb67a7 AS |
24 | #include <linux/hrtimer.h> |
25 | #include <linux/io.h> | |
99f91934 | 26 | #include <linux/module.h> |
f3bc64d6 | 27 | #include <linux/of.h> |
7a7a4a59 | 28 | #include <linux/platform_device.h> |
99f91934 AS |
29 | #include <linux/usb.h> |
30 | #include <linux/usb/hcd.h> | |
7a7a4a59 HM |
31 | #include <linux/usb/ehci_pdriver.h> |
32 | ||
99f91934 AS |
33 | #include "ehci.h" |
34 | ||
35 | #define DRIVER_DESC "EHCI generic platform driver" | |
36 | ||
37 | static const char hcd_name[] = "ehci-platform"; | |
38 | ||
7a7a4a59 HM |
39 | static int ehci_platform_reset(struct usb_hcd *hcd) |
40 | { | |
41 | struct platform_device *pdev = to_platform_device(hcd->self.controller); | |
d4f09e28 | 42 | struct usb_ehci_pdata *pdata = dev_get_platdata(&pdev->dev); |
7a7a4a59 HM |
43 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
44 | int retval; | |
45 | ||
46 | hcd->has_tt = pdata->has_tt; | |
47 | ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug; | |
48 | ehci->big_endian_desc = pdata->big_endian_desc; | |
49 | ehci->big_endian_mmio = pdata->big_endian_mmio; | |
50 | ||
743fcce0 SS |
51 | if (pdata->pre_setup) { |
52 | retval = pdata->pre_setup(hcd); | |
53 | if (retval < 0) | |
54 | return retval; | |
55 | } | |
56 | ||
7a7a4a59 HM |
57 | ehci->caps = hcd->regs + pdata->caps_offset; |
58 | retval = ehci_setup(hcd); | |
59 | if (retval) | |
60 | return retval; | |
61 | ||
4534874a FF |
62 | if (pdata->no_io_watchdog) |
63 | ehci->need_io_watchdog = 0; | |
7a7a4a59 HM |
64 | return 0; |
65 | } | |
66 | ||
99f91934 | 67 | static struct hc_driver __read_mostly ehci_platform_hc_driver; |
7a7a4a59 | 68 | |
62d08a11 | 69 | static const struct ehci_driver_overrides platform_overrides __initconst = { |
99f91934 | 70 | .reset = ehci_platform_reset, |
7a7a4a59 HM |
71 | }; |
72 | ||
f3bc64d6 AB |
73 | static struct usb_ehci_pdata ehci_platform_defaults; |
74 | ||
41ac7b3a | 75 | static int ehci_platform_probe(struct platform_device *dev) |
7a7a4a59 HM |
76 | { |
77 | struct usb_hcd *hcd; | |
78 | struct resource *res_mem; | |
f3bc64d6 | 79 | struct usb_ehci_pdata *pdata; |
7a7a4a59 | 80 | int irq; |
22d9d8e8 | 81 | int err; |
7a7a4a59 | 82 | |
7a7a4a59 HM |
83 | if (usb_disabled()) |
84 | return -ENODEV; | |
85 | ||
f3bc64d6 AB |
86 | /* |
87 | * use reasonable defaults so platforms don't have to provide these. | |
88 | * with DT probing on ARM, none of these are set. | |
89 | */ | |
d4f09e28 | 90 | if (!dev_get_platdata(&dev->dev)) |
f3bc64d6 | 91 | dev->dev.platform_data = &ehci_platform_defaults; |
e1fd7341 RK |
92 | |
93 | err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32)); | |
22d9d8e8 RK |
94 | if (err) |
95 | return err; | |
f3bc64d6 | 96 | |
d4f09e28 | 97 | pdata = dev_get_platdata(&dev->dev); |
f3bc64d6 | 98 | |
7a7a4a59 HM |
99 | irq = platform_get_irq(dev, 0); |
100 | if (irq < 0) { | |
2350cb0c | 101 | dev_err(&dev->dev, "no irq provided"); |
7a7a4a59 HM |
102 | return irq; |
103 | } | |
104 | res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0); | |
105 | if (!res_mem) { | |
5c9b2b28 | 106 | dev_err(&dev->dev, "no memory resource provided"); |
7a7a4a59 HM |
107 | return -ENXIO; |
108 | } | |
109 | ||
04216bed KM |
110 | if (pdata->power_on) { |
111 | err = pdata->power_on(dev); | |
112 | if (err < 0) | |
113 | return err; | |
114 | } | |
115 | ||
7a7a4a59 HM |
116 | hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev, |
117 | dev_name(&dev->dev)); | |
04216bed KM |
118 | if (!hcd) { |
119 | err = -ENOMEM; | |
120 | goto err_power; | |
121 | } | |
7a7a4a59 HM |
122 | |
123 | hcd->rsrc_start = res_mem->start; | |
124 | hcd->rsrc_len = resource_size(res_mem); | |
125 | ||
148e1134 TR |
126 | hcd->regs = devm_ioremap_resource(&dev->dev, res_mem); |
127 | if (IS_ERR(hcd->regs)) { | |
128 | err = PTR_ERR(hcd->regs); | |
61ff2745 | 129 | goto err_put_hcd; |
ec03ad85 | 130 | } |
7a7a4a59 HM |
131 | err = usb_add_hcd(hcd, irq, IRQF_SHARED); |
132 | if (err) | |
61ff2745 | 133 | goto err_put_hcd; |
7a7a4a59 HM |
134 | |
135 | platform_set_drvdata(dev, hcd); | |
136 | ||
137 | return err; | |
138 | ||
7a7a4a59 HM |
139 | err_put_hcd: |
140 | usb_put_hcd(hcd); | |
04216bed KM |
141 | err_power: |
142 | if (pdata->power_off) | |
143 | pdata->power_off(dev); | |
144 | ||
7a7a4a59 HM |
145 | return err; |
146 | } | |
147 | ||
fb4e98ab | 148 | static int ehci_platform_remove(struct platform_device *dev) |
7a7a4a59 HM |
149 | { |
150 | struct usb_hcd *hcd = platform_get_drvdata(dev); | |
d4f09e28 | 151 | struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev); |
7a7a4a59 HM |
152 | |
153 | usb_remove_hcd(hcd); | |
7a7a4a59 | 154 | usb_put_hcd(hcd); |
7a7a4a59 | 155 | |
04216bed KM |
156 | if (pdata->power_off) |
157 | pdata->power_off(dev); | |
158 | ||
f3bc64d6 AB |
159 | if (pdata == &ehci_platform_defaults) |
160 | dev->dev.platform_data = NULL; | |
161 | ||
7a7a4a59 HM |
162 | return 0; |
163 | } | |
164 | ||
165 | #ifdef CONFIG_PM | |
166 | ||
167 | static int ehci_platform_suspend(struct device *dev) | |
168 | { | |
169 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
d4f09e28 | 170 | struct usb_ehci_pdata *pdata = dev_get_platdata(dev); |
04216bed KM |
171 | struct platform_device *pdev = |
172 | container_of(dev, struct platform_device, dev); | |
c5cf9212 | 173 | bool do_wakeup = device_may_wakeup(dev); |
04216bed KM |
174 | int ret; |
175 | ||
176 | ret = ehci_suspend(hcd, do_wakeup); | |
7a7a4a59 | 177 | |
04216bed KM |
178 | if (pdata->power_suspend) |
179 | pdata->power_suspend(pdev); | |
180 | ||
181 | return ret; | |
7a7a4a59 HM |
182 | } |
183 | ||
184 | static int ehci_platform_resume(struct device *dev) | |
185 | { | |
186 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
d4f09e28 | 187 | struct usb_ehci_pdata *pdata = dev_get_platdata(dev); |
04216bed KM |
188 | struct platform_device *pdev = |
189 | container_of(dev, struct platform_device, dev); | |
190 | ||
191 | if (pdata->power_on) { | |
192 | int err = pdata->power_on(pdev); | |
193 | if (err < 0) | |
194 | return err; | |
195 | } | |
7a7a4a59 | 196 | |
c5cf9212 | 197 | ehci_resume(hcd, false); |
7a7a4a59 HM |
198 | return 0; |
199 | } | |
200 | ||
201 | #else /* !CONFIG_PM */ | |
202 | #define ehci_platform_suspend NULL | |
203 | #define ehci_platform_resume NULL | |
204 | #endif /* CONFIG_PM */ | |
205 | ||
f3bc64d6 AB |
206 | static const struct of_device_id vt8500_ehci_ids[] = { |
207 | { .compatible = "via,vt8500-ehci", }, | |
208 | { .compatible = "wm,prizm-ehci", }, | |
209 | {} | |
210 | }; | |
211 | ||
7a7a4a59 HM |
212 | static const struct platform_device_id ehci_platform_table[] = { |
213 | { "ehci-platform", 0 }, | |
214 | { } | |
215 | }; | |
216 | MODULE_DEVICE_TABLE(platform, ehci_platform_table); | |
217 | ||
218 | static const struct dev_pm_ops ehci_platform_pm_ops = { | |
219 | .suspend = ehci_platform_suspend, | |
220 | .resume = ehci_platform_resume, | |
221 | }; | |
222 | ||
223 | static struct platform_driver ehci_platform_driver = { | |
224 | .id_table = ehci_platform_table, | |
225 | .probe = ehci_platform_probe, | |
7690417d | 226 | .remove = ehci_platform_remove, |
7a7a4a59 HM |
227 | .shutdown = usb_hcd_platform_shutdown, |
228 | .driver = { | |
229 | .owner = THIS_MODULE, | |
230 | .name = "ehci-platform", | |
231 | .pm = &ehci_platform_pm_ops, | |
ae5e5f7b | 232 | .of_match_table = vt8500_ehci_ids, |
7a7a4a59 HM |
233 | } |
234 | }; | |
99f91934 AS |
235 | |
236 | static int __init ehci_platform_init(void) | |
237 | { | |
238 | if (usb_disabled()) | |
239 | return -ENODEV; | |
240 | ||
241 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); | |
242 | ||
243 | ehci_init_driver(&ehci_platform_hc_driver, &platform_overrides); | |
244 | return platform_driver_register(&ehci_platform_driver); | |
245 | } | |
246 | module_init(ehci_platform_init); | |
247 | ||
248 | static void __exit ehci_platform_cleanup(void) | |
249 | { | |
250 | platform_driver_unregister(&ehci_platform_driver); | |
251 | } | |
252 | module_exit(ehci_platform_cleanup); | |
253 | ||
254 | MODULE_DESCRIPTION(DRIVER_DESC); | |
255 | MODULE_AUTHOR("Hauke Mehrtens"); | |
256 | MODULE_AUTHOR("Alan Stern"); | |
257 | MODULE_LICENSE("GPL"); |