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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); | |
42 | struct usb_ehci_pdata *pdata = pdev->dev.platform_data; | |
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 | ||
51 | ehci->caps = hcd->regs + pdata->caps_offset; | |
52 | retval = ehci_setup(hcd); | |
53 | if (retval) | |
54 | return retval; | |
55 | ||
4534874a FF |
56 | if (pdata->no_io_watchdog) |
57 | ehci->need_io_watchdog = 0; | |
7a7a4a59 HM |
58 | return 0; |
59 | } | |
60 | ||
99f91934 | 61 | static struct hc_driver __read_mostly ehci_platform_hc_driver; |
7a7a4a59 | 62 | |
62d08a11 | 63 | static const struct ehci_driver_overrides platform_overrides __initconst = { |
99f91934 | 64 | .reset = ehci_platform_reset, |
7a7a4a59 HM |
65 | }; |
66 | ||
f3bc64d6 AB |
67 | static struct usb_ehci_pdata ehci_platform_defaults; |
68 | ||
41ac7b3a | 69 | static int ehci_platform_probe(struct platform_device *dev) |
7a7a4a59 HM |
70 | { |
71 | struct usb_hcd *hcd; | |
72 | struct resource *res_mem; | |
f3bc64d6 | 73 | struct usb_ehci_pdata *pdata; |
7a7a4a59 HM |
74 | int irq; |
75 | int err = -ENOMEM; | |
76 | ||
7a7a4a59 HM |
77 | if (usb_disabled()) |
78 | return -ENODEV; | |
79 | ||
f3bc64d6 AB |
80 | /* |
81 | * use reasonable defaults so platforms don't have to provide these. | |
82 | * with DT probing on ARM, none of these are set. | |
83 | */ | |
84 | if (!dev->dev.platform_data) | |
85 | dev->dev.platform_data = &ehci_platform_defaults; | |
86 | if (!dev->dev.dma_mask) | |
87 | dev->dev.dma_mask = &dev->dev.coherent_dma_mask; | |
88 | if (!dev->dev.coherent_dma_mask) | |
89 | dev->dev.coherent_dma_mask = DMA_BIT_MASK(32); | |
90 | ||
91 | pdata = dev->dev.platform_data; | |
92 | ||
7a7a4a59 HM |
93 | irq = platform_get_irq(dev, 0); |
94 | if (irq < 0) { | |
2350cb0c | 95 | dev_err(&dev->dev, "no irq provided"); |
7a7a4a59 HM |
96 | return irq; |
97 | } | |
98 | res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0); | |
99 | if (!res_mem) { | |
5c9b2b28 | 100 | dev_err(&dev->dev, "no memory resource provided"); |
7a7a4a59 HM |
101 | return -ENXIO; |
102 | } | |
103 | ||
04216bed KM |
104 | if (pdata->power_on) { |
105 | err = pdata->power_on(dev); | |
106 | if (err < 0) | |
107 | return err; | |
108 | } | |
109 | ||
7a7a4a59 HM |
110 | hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev, |
111 | dev_name(&dev->dev)); | |
04216bed KM |
112 | if (!hcd) { |
113 | err = -ENOMEM; | |
114 | goto err_power; | |
115 | } | |
7a7a4a59 HM |
116 | |
117 | hcd->rsrc_start = res_mem->start; | |
118 | hcd->rsrc_len = resource_size(res_mem); | |
119 | ||
148e1134 TR |
120 | hcd->regs = devm_ioremap_resource(&dev->dev, res_mem); |
121 | if (IS_ERR(hcd->regs)) { | |
122 | err = PTR_ERR(hcd->regs); | |
61ff2745 | 123 | goto err_put_hcd; |
ec03ad85 | 124 | } |
7a7a4a59 HM |
125 | err = usb_add_hcd(hcd, irq, IRQF_SHARED); |
126 | if (err) | |
61ff2745 | 127 | goto err_put_hcd; |
7a7a4a59 HM |
128 | |
129 | platform_set_drvdata(dev, hcd); | |
130 | ||
131 | return err; | |
132 | ||
7a7a4a59 HM |
133 | err_put_hcd: |
134 | usb_put_hcd(hcd); | |
04216bed KM |
135 | err_power: |
136 | if (pdata->power_off) | |
137 | pdata->power_off(dev); | |
138 | ||
7a7a4a59 HM |
139 | return err; |
140 | } | |
141 | ||
fb4e98ab | 142 | static int ehci_platform_remove(struct platform_device *dev) |
7a7a4a59 HM |
143 | { |
144 | struct usb_hcd *hcd = platform_get_drvdata(dev); | |
04216bed | 145 | struct usb_ehci_pdata *pdata = dev->dev.platform_data; |
7a7a4a59 HM |
146 | |
147 | usb_remove_hcd(hcd); | |
7a7a4a59 HM |
148 | usb_put_hcd(hcd); |
149 | platform_set_drvdata(dev, NULL); | |
150 | ||
04216bed KM |
151 | if (pdata->power_off) |
152 | pdata->power_off(dev); | |
153 | ||
f3bc64d6 AB |
154 | if (pdata == &ehci_platform_defaults) |
155 | dev->dev.platform_data = NULL; | |
156 | ||
7a7a4a59 HM |
157 | return 0; |
158 | } | |
159 | ||
160 | #ifdef CONFIG_PM | |
161 | ||
162 | static int ehci_platform_suspend(struct device *dev) | |
163 | { | |
164 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
04216bed KM |
165 | struct usb_ehci_pdata *pdata = dev->platform_data; |
166 | struct platform_device *pdev = | |
167 | container_of(dev, struct platform_device, dev); | |
c5cf9212 | 168 | bool do_wakeup = device_may_wakeup(dev); |
04216bed KM |
169 | int ret; |
170 | ||
171 | ret = ehci_suspend(hcd, do_wakeup); | |
7a7a4a59 | 172 | |
04216bed KM |
173 | if (pdata->power_suspend) |
174 | pdata->power_suspend(pdev); | |
175 | ||
176 | return ret; | |
7a7a4a59 HM |
177 | } |
178 | ||
179 | static int ehci_platform_resume(struct device *dev) | |
180 | { | |
181 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
04216bed KM |
182 | struct usb_ehci_pdata *pdata = dev->platform_data; |
183 | struct platform_device *pdev = | |
184 | container_of(dev, struct platform_device, dev); | |
185 | ||
186 | if (pdata->power_on) { | |
187 | int err = pdata->power_on(pdev); | |
188 | if (err < 0) | |
189 | return err; | |
190 | } | |
7a7a4a59 | 191 | |
c5cf9212 | 192 | ehci_resume(hcd, false); |
7a7a4a59 HM |
193 | return 0; |
194 | } | |
195 | ||
196 | #else /* !CONFIG_PM */ | |
197 | #define ehci_platform_suspend NULL | |
198 | #define ehci_platform_resume NULL | |
199 | #endif /* CONFIG_PM */ | |
200 | ||
f3bc64d6 AB |
201 | static const struct of_device_id vt8500_ehci_ids[] = { |
202 | { .compatible = "via,vt8500-ehci", }, | |
203 | { .compatible = "wm,prizm-ehci", }, | |
204 | {} | |
205 | }; | |
206 | ||
7a7a4a59 HM |
207 | static const struct platform_device_id ehci_platform_table[] = { |
208 | { "ehci-platform", 0 }, | |
209 | { } | |
210 | }; | |
211 | MODULE_DEVICE_TABLE(platform, ehci_platform_table); | |
212 | ||
213 | static const struct dev_pm_ops ehci_platform_pm_ops = { | |
214 | .suspend = ehci_platform_suspend, | |
215 | .resume = ehci_platform_resume, | |
216 | }; | |
217 | ||
218 | static struct platform_driver ehci_platform_driver = { | |
219 | .id_table = ehci_platform_table, | |
220 | .probe = ehci_platform_probe, | |
7690417d | 221 | .remove = ehci_platform_remove, |
7a7a4a59 HM |
222 | .shutdown = usb_hcd_platform_shutdown, |
223 | .driver = { | |
224 | .owner = THIS_MODULE, | |
225 | .name = "ehci-platform", | |
226 | .pm = &ehci_platform_pm_ops, | |
f3bc64d6 | 227 | .of_match_table = of_match_ptr(vt8500_ehci_ids), |
7a7a4a59 HM |
228 | } |
229 | }; | |
99f91934 AS |
230 | |
231 | static int __init ehci_platform_init(void) | |
232 | { | |
233 | if (usb_disabled()) | |
234 | return -ENODEV; | |
235 | ||
236 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); | |
237 | ||
238 | ehci_init_driver(&ehci_platform_hc_driver, &platform_overrides); | |
239 | return platform_driver_register(&ehci_platform_driver); | |
240 | } | |
241 | module_init(ehci_platform_init); | |
242 | ||
243 | static void __exit ehci_platform_cleanup(void) | |
244 | { | |
245 | platform_driver_unregister(&ehci_platform_driver); | |
246 | } | |
247 | module_exit(ehci_platform_cleanup); | |
248 | ||
249 | MODULE_DESCRIPTION(DRIVER_DESC); | |
250 | MODULE_AUTHOR("Hauke Mehrtens"); | |
251 | MODULE_AUTHOR("Alan Stern"); | |
252 | MODULE_LICENSE("GPL"); |