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88ed0c97 AG |
1 | /* |
2 | * ohci-omap3.c - driver for OHCI on OMAP3 and later processors | |
3 | * | |
4 | * Bus Glue for OMAP3 USBHOST 3 port OHCI controller | |
5 | * This controller is also used in later OMAPs and AM35x chips | |
6 | * | |
7 | * Copyright (C) 2007-2010 Texas Instruments, Inc. | |
8 | * Author: Vikram Pandita <vikram.pandita@ti.com> | |
9 | * Author: Anand Gadiyar <gadiyar@ti.com> | |
19403165 | 10 | * Author: Keshava Munegowda <keshava_mgowda@ti.com> |
88ed0c97 AG |
11 | * |
12 | * Based on ehci-omap.c and some other ohci glue layers | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2 of the License, or | |
17 | * (at your option) any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with this program; if not, write to the Free Software | |
26 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
27 | * | |
19403165 | 28 | * TODO (last updated Feb 27, 2011): |
88ed0c97 | 29 | * - add kernel-doc |
88ed0c97 AG |
30 | */ |
31 | ||
32 | #include <linux/platform_device.h> | |
6c984b06 | 33 | #include <linux/pm_runtime.h> |
88ed0c97 | 34 | |
88ed0c97 AG |
35 | /*-------------------------------------------------------------------------*/ |
36 | ||
88ed0c97 AG |
37 | static int ohci_omap3_init(struct usb_hcd *hcd) |
38 | { | |
39 | dev_dbg(hcd->self.controller, "starting OHCI controller\n"); | |
40 | ||
41 | return ohci_init(hcd_to_ohci(hcd)); | |
42 | } | |
43 | ||
88ed0c97 AG |
44 | /*-------------------------------------------------------------------------*/ |
45 | ||
46 | static int ohci_omap3_start(struct usb_hcd *hcd) | |
47 | { | |
48 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
49 | int ret; | |
50 | ||
51 | /* | |
52 | * RemoteWakeupConnected has to be set explicitly before | |
53 | * calling ohci_run. The reset value of RWC is 0. | |
54 | */ | |
55 | ohci->hc_control = OHCI_CTRL_RWC; | |
56 | writel(OHCI_CTRL_RWC, &ohci->regs->control); | |
57 | ||
58 | ret = ohci_run(ohci); | |
59 | ||
60 | if (ret < 0) { | |
61 | dev_err(hcd->self.controller, "can't start\n"); | |
62 | ohci_stop(hcd); | |
63 | } | |
64 | ||
65 | return ret; | |
66 | } | |
67 | ||
68 | /*-------------------------------------------------------------------------*/ | |
69 | ||
88ed0c97 AG |
70 | static const struct hc_driver ohci_omap3_hc_driver = { |
71 | .description = hcd_name, | |
72 | .product_desc = "OMAP3 OHCI Host Controller", | |
73 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
74 | ||
75 | /* | |
76 | * generic hardware linkage | |
77 | */ | |
78 | .irq = ohci_irq, | |
79 | .flags = HCD_USB11 | HCD_MEMORY, | |
80 | ||
81 | /* | |
82 | * basic lifecycle operations | |
83 | */ | |
84 | .reset = ohci_omap3_init, | |
85 | .start = ohci_omap3_start, | |
86 | .stop = ohci_stop, | |
87 | .shutdown = ohci_shutdown, | |
88 | ||
89 | /* | |
90 | * managing i/o requests and associated device resources | |
91 | */ | |
92 | .urb_enqueue = ohci_urb_enqueue, | |
93 | .urb_dequeue = ohci_urb_dequeue, | |
94 | .endpoint_disable = ohci_endpoint_disable, | |
95 | ||
96 | /* | |
97 | * scheduling support | |
98 | */ | |
99 | .get_frame_number = ohci_get_frame, | |
100 | ||
101 | /* | |
102 | * root hub support | |
103 | */ | |
104 | .hub_status_data = ohci_hub_status_data, | |
105 | .hub_control = ohci_hub_control, | |
106 | #ifdef CONFIG_PM | |
107 | .bus_suspend = ohci_bus_suspend, | |
108 | .bus_resume = ohci_bus_resume, | |
109 | #endif | |
110 | .start_port_reset = ohci_start_port_reset, | |
111 | }; | |
112 | ||
113 | /*-------------------------------------------------------------------------*/ | |
114 | ||
115 | /* | |
116 | * configure so an HC device and id are always provided | |
117 | * always called with process context; sleeping is OK | |
118 | */ | |
119 | ||
120 | /** | |
121 | * ohci_hcd_omap3_probe - initialize OMAP-based HCDs | |
122 | * | |
123 | * Allocates basic resources for this USB host controller, and | |
124 | * then invokes the start() method for the HCD associated with it | |
125 | * through the hotplug entry's driver_data. | |
126 | */ | |
41ac7b3a | 127 | static int ohci_hcd_omap3_probe(struct platform_device *pdev) |
88ed0c97 | 128 | { |
19403165 KM |
129 | struct device *dev = &pdev->dev; |
130 | struct usb_hcd *hcd = NULL; | |
131 | void __iomem *regs = NULL; | |
132 | struct resource *res; | |
133 | int ret = -ENODEV; | |
134 | int irq; | |
88ed0c97 AG |
135 | |
136 | if (usb_disabled()) | |
6c984b06 | 137 | return -ENODEV; |
88ed0c97 | 138 | |
19403165 KM |
139 | if (!dev->parent) { |
140 | dev_err(dev, "Missing parent device\n"); | |
141 | return -ENODEV; | |
88ed0c97 AG |
142 | } |
143 | ||
19403165 KM |
144 | irq = platform_get_irq_byname(pdev, "ohci-irq"); |
145 | if (irq < 0) { | |
146 | dev_err(dev, "OHCI irq failed\n"); | |
147 | return -ENODEV; | |
148 | } | |
88ed0c97 | 149 | |
19403165 KM |
150 | res = platform_get_resource_byname(pdev, |
151 | IORESOURCE_MEM, "ohci"); | |
d80cba6c | 152 | if (!res) { |
19403165 KM |
153 | dev_err(dev, "UHH OHCI get resource failed\n"); |
154 | return -ENOMEM; | |
88ed0c97 AG |
155 | } |
156 | ||
19403165 KM |
157 | regs = ioremap(res->start, resource_size(res)); |
158 | if (!regs) { | |
159 | dev_err(dev, "UHH OHCI ioremap failed\n"); | |
160 | return -ENOMEM; | |
88ed0c97 AG |
161 | } |
162 | ||
88ed0c97 | 163 | |
19403165 KM |
164 | hcd = usb_create_hcd(&ohci_omap3_hc_driver, dev, |
165 | dev_name(dev)); | |
166 | if (!hcd) { | |
167 | dev_err(dev, "usb_create_hcd failed\n"); | |
168 | goto err_io; | |
169 | } | |
88ed0c97 AG |
170 | |
171 | hcd->rsrc_start = res->start; | |
172 | hcd->rsrc_len = resource_size(res); | |
19403165 | 173 | hcd->regs = regs; |
88ed0c97 | 174 | |
6c984b06 KM |
175 | pm_runtime_enable(dev); |
176 | pm_runtime_get_sync(dev); | |
88ed0c97 | 177 | |
19403165 | 178 | ohci_hcd_init(hcd_to_ohci(hcd)); |
88ed0c97 | 179 | |
b5dd18d8 | 180 | ret = usb_add_hcd(hcd, irq, 0); |
88ed0c97 | 181 | if (ret) { |
19403165 | 182 | dev_dbg(dev, "failed to add hcd with err %d\n", ret); |
88ed0c97 AG |
183 | goto err_add_hcd; |
184 | } | |
185 | ||
186 | return 0; | |
187 | ||
188 | err_add_hcd: | |
6c984b06 | 189 | pm_runtime_put_sync(dev); |
88ed0c97 AG |
190 | usb_put_hcd(hcd); |
191 | ||
19403165 KM |
192 | err_io: |
193 | iounmap(regs); | |
194 | ||
88ed0c97 AG |
195 | return ret; |
196 | } | |
197 | ||
198 | /* | |
199 | * may be called without controller electrically present | |
200 | * may be called with controller, bus, and devices active | |
201 | */ | |
202 | ||
203 | /** | |
204 | * ohci_hcd_omap3_remove - shutdown processing for OHCI HCDs | |
205 | * @pdev: USB Host Controller being removed | |
206 | * | |
207 | * Reverses the effect of ohci_hcd_omap3_probe(), first invoking | |
208 | * the HCD's stop() method. It is always called from a thread | |
209 | * context, normally "rmmod", "apmd", or something similar. | |
210 | */ | |
fb4e98ab | 211 | static int ohci_hcd_omap3_remove(struct platform_device *pdev) |
88ed0c97 | 212 | { |
19403165 KM |
213 | struct device *dev = &pdev->dev; |
214 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
88ed0c97 | 215 | |
88ed0c97 | 216 | iounmap(hcd->regs); |
19403165 | 217 | usb_remove_hcd(hcd); |
6c984b06 KM |
218 | pm_runtime_put_sync(dev); |
219 | pm_runtime_disable(dev); | |
88ed0c97 | 220 | usb_put_hcd(hcd); |
88ed0c97 AG |
221 | return 0; |
222 | } | |
223 | ||
224 | static void ohci_hcd_omap3_shutdown(struct platform_device *pdev) | |
225 | { | |
19403165 | 226 | struct usb_hcd *hcd = dev_get_drvdata(&pdev->dev); |
88ed0c97 AG |
227 | |
228 | if (hcd->driver->shutdown) | |
229 | hcd->driver->shutdown(hcd); | |
230 | } | |
231 | ||
232 | static struct platform_driver ohci_hcd_omap3_driver = { | |
233 | .probe = ohci_hcd_omap3_probe, | |
7690417d | 234 | .remove = ohci_hcd_omap3_remove, |
88ed0c97 AG |
235 | .shutdown = ohci_hcd_omap3_shutdown, |
236 | .driver = { | |
237 | .name = "ohci-omap3", | |
238 | }, | |
239 | }; | |
240 | ||
241 | MODULE_ALIAS("platform:ohci-omap3"); | |
242 | MODULE_AUTHOR("Anand Gadiyar <gadiyar@ti.com>"); |