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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> |
5867320d RQ |
34 | #include <linux/of.h> |
35 | #include <linux/dma-mapping.h> | |
88ed0c97 | 36 | |
88ed0c97 AG |
37 | /*-------------------------------------------------------------------------*/ |
38 | ||
88ed0c97 AG |
39 | static int ohci_omap3_init(struct usb_hcd *hcd) |
40 | { | |
41 | dev_dbg(hcd->self.controller, "starting OHCI controller\n"); | |
42 | ||
43 | return ohci_init(hcd_to_ohci(hcd)); | |
44 | } | |
45 | ||
88ed0c97 AG |
46 | /*-------------------------------------------------------------------------*/ |
47 | ||
48 | static int ohci_omap3_start(struct usb_hcd *hcd) | |
49 | { | |
50 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
51 | int ret; | |
52 | ||
53 | /* | |
54 | * RemoteWakeupConnected has to be set explicitly before | |
55 | * calling ohci_run. The reset value of RWC is 0. | |
56 | */ | |
57 | ohci->hc_control = OHCI_CTRL_RWC; | |
58 | writel(OHCI_CTRL_RWC, &ohci->regs->control); | |
59 | ||
60 | ret = ohci_run(ohci); | |
61 | ||
62 | if (ret < 0) { | |
63 | dev_err(hcd->self.controller, "can't start\n"); | |
64 | ohci_stop(hcd); | |
65 | } | |
66 | ||
67 | return ret; | |
68 | } | |
69 | ||
70 | /*-------------------------------------------------------------------------*/ | |
71 | ||
88ed0c97 AG |
72 | static const struct hc_driver ohci_omap3_hc_driver = { |
73 | .description = hcd_name, | |
74 | .product_desc = "OMAP3 OHCI Host Controller", | |
75 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
76 | ||
77 | /* | |
78 | * generic hardware linkage | |
79 | */ | |
80 | .irq = ohci_irq, | |
81 | .flags = HCD_USB11 | HCD_MEMORY, | |
82 | ||
83 | /* | |
84 | * basic lifecycle operations | |
85 | */ | |
86 | .reset = ohci_omap3_init, | |
87 | .start = ohci_omap3_start, | |
88 | .stop = ohci_stop, | |
89 | .shutdown = ohci_shutdown, | |
90 | ||
91 | /* | |
92 | * managing i/o requests and associated device resources | |
93 | */ | |
94 | .urb_enqueue = ohci_urb_enqueue, | |
95 | .urb_dequeue = ohci_urb_dequeue, | |
96 | .endpoint_disable = ohci_endpoint_disable, | |
97 | ||
98 | /* | |
99 | * scheduling support | |
100 | */ | |
101 | .get_frame_number = ohci_get_frame, | |
102 | ||
103 | /* | |
104 | * root hub support | |
105 | */ | |
106 | .hub_status_data = ohci_hub_status_data, | |
107 | .hub_control = ohci_hub_control, | |
108 | #ifdef CONFIG_PM | |
109 | .bus_suspend = ohci_bus_suspend, | |
110 | .bus_resume = ohci_bus_resume, | |
111 | #endif | |
112 | .start_port_reset = ohci_start_port_reset, | |
113 | }; | |
114 | ||
115 | /*-------------------------------------------------------------------------*/ | |
116 | ||
5867320d RQ |
117 | static u64 omap_ohci_dma_mask = DMA_BIT_MASK(32); |
118 | ||
88ed0c97 AG |
119 | /* |
120 | * configure so an HC device and id are always provided | |
121 | * always called with process context; sleeping is OK | |
122 | */ | |
123 | ||
124 | /** | |
125 | * ohci_hcd_omap3_probe - initialize OMAP-based HCDs | |
126 | * | |
127 | * Allocates basic resources for this USB host controller, and | |
128 | * then invokes the start() method for the HCD associated with it | |
129 | * through the hotplug entry's driver_data. | |
130 | */ | |
41ac7b3a | 131 | static int ohci_hcd_omap3_probe(struct platform_device *pdev) |
88ed0c97 | 132 | { |
19403165 KM |
133 | struct device *dev = &pdev->dev; |
134 | struct usb_hcd *hcd = NULL; | |
135 | void __iomem *regs = NULL; | |
136 | struct resource *res; | |
137 | int ret = -ENODEV; | |
138 | int irq; | |
88ed0c97 AG |
139 | |
140 | if (usb_disabled()) | |
6c984b06 | 141 | return -ENODEV; |
88ed0c97 | 142 | |
19403165 KM |
143 | if (!dev->parent) { |
144 | dev_err(dev, "Missing parent device\n"); | |
145 | return -ENODEV; | |
88ed0c97 AG |
146 | } |
147 | ||
8c3ec385 | 148 | irq = platform_get_irq(pdev, 0); |
19403165 KM |
149 | if (irq < 0) { |
150 | dev_err(dev, "OHCI irq failed\n"); | |
151 | return -ENODEV; | |
152 | } | |
88ed0c97 | 153 | |
8c3ec385 | 154 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
d80cba6c | 155 | if (!res) { |
19403165 KM |
156 | dev_err(dev, "UHH OHCI get resource failed\n"); |
157 | return -ENOMEM; | |
88ed0c97 AG |
158 | } |
159 | ||
19403165 KM |
160 | regs = ioremap(res->start, resource_size(res)); |
161 | if (!regs) { | |
162 | dev_err(dev, "UHH OHCI ioremap failed\n"); | |
163 | return -ENOMEM; | |
88ed0c97 AG |
164 | } |
165 | ||
5867320d RQ |
166 | /* |
167 | * Right now device-tree probed devices don't get dma_mask set. | |
168 | * Since shared usb code relies on it, set it here for now. | |
169 | * Once we have dma capability bindings this can go away. | |
170 | */ | |
171 | if (!pdev->dev.dma_mask) | |
172 | pdev->dev.dma_mask = &omap_ohci_dma_mask; | |
88ed0c97 | 173 | |
19403165 KM |
174 | hcd = usb_create_hcd(&ohci_omap3_hc_driver, dev, |
175 | dev_name(dev)); | |
176 | if (!hcd) { | |
177 | dev_err(dev, "usb_create_hcd failed\n"); | |
178 | goto err_io; | |
179 | } | |
88ed0c97 AG |
180 | |
181 | hcd->rsrc_start = res->start; | |
182 | hcd->rsrc_len = resource_size(res); | |
19403165 | 183 | hcd->regs = regs; |
88ed0c97 | 184 | |
6c984b06 KM |
185 | pm_runtime_enable(dev); |
186 | pm_runtime_get_sync(dev); | |
88ed0c97 | 187 | |
19403165 | 188 | ohci_hcd_init(hcd_to_ohci(hcd)); |
88ed0c97 | 189 | |
b5dd18d8 | 190 | ret = usb_add_hcd(hcd, irq, 0); |
88ed0c97 | 191 | if (ret) { |
19403165 | 192 | dev_dbg(dev, "failed to add hcd with err %d\n", ret); |
88ed0c97 AG |
193 | goto err_add_hcd; |
194 | } | |
195 | ||
196 | return 0; | |
197 | ||
198 | err_add_hcd: | |
6c984b06 | 199 | pm_runtime_put_sync(dev); |
88ed0c97 AG |
200 | usb_put_hcd(hcd); |
201 | ||
19403165 KM |
202 | err_io: |
203 | iounmap(regs); | |
204 | ||
88ed0c97 AG |
205 | return ret; |
206 | } | |
207 | ||
208 | /* | |
209 | * may be called without controller electrically present | |
210 | * may be called with controller, bus, and devices active | |
211 | */ | |
212 | ||
213 | /** | |
214 | * ohci_hcd_omap3_remove - shutdown processing for OHCI HCDs | |
215 | * @pdev: USB Host Controller being removed | |
216 | * | |
217 | * Reverses the effect of ohci_hcd_omap3_probe(), first invoking | |
218 | * the HCD's stop() method. It is always called from a thread | |
219 | * context, normally "rmmod", "apmd", or something similar. | |
220 | */ | |
fb4e98ab | 221 | static int ohci_hcd_omap3_remove(struct platform_device *pdev) |
88ed0c97 | 222 | { |
19403165 KM |
223 | struct device *dev = &pdev->dev; |
224 | struct usb_hcd *hcd = dev_get_drvdata(dev); | |
88ed0c97 | 225 | |
88ed0c97 | 226 | iounmap(hcd->regs); |
19403165 | 227 | usb_remove_hcd(hcd); |
6c984b06 KM |
228 | pm_runtime_put_sync(dev); |
229 | pm_runtime_disable(dev); | |
88ed0c97 | 230 | usb_put_hcd(hcd); |
88ed0c97 AG |
231 | return 0; |
232 | } | |
233 | ||
234 | static void ohci_hcd_omap3_shutdown(struct platform_device *pdev) | |
235 | { | |
19403165 | 236 | struct usb_hcd *hcd = dev_get_drvdata(&pdev->dev); |
88ed0c97 AG |
237 | |
238 | if (hcd->driver->shutdown) | |
239 | hcd->driver->shutdown(hcd); | |
240 | } | |
241 | ||
5867320d RQ |
242 | static const struct of_device_id omap_ohci_dt_ids[] = { |
243 | { .compatible = "ti,ohci-omap3" }, | |
244 | { } | |
245 | }; | |
246 | ||
247 | MODULE_DEVICE_TABLE(of, omap_ohci_dt_ids); | |
248 | ||
88ed0c97 AG |
249 | static struct platform_driver ohci_hcd_omap3_driver = { |
250 | .probe = ohci_hcd_omap3_probe, | |
7690417d | 251 | .remove = ohci_hcd_omap3_remove, |
88ed0c97 AG |
252 | .shutdown = ohci_hcd_omap3_shutdown, |
253 | .driver = { | |
254 | .name = "ohci-omap3", | |
5867320d | 255 | .of_match_table = of_match_ptr(omap_ohci_dt_ids), |
88ed0c97 AG |
256 | }, |
257 | }; | |
258 | ||
259 | MODULE_ALIAS("platform:ohci-omap3"); | |
260 | MODULE_AUTHOR("Anand Gadiyar <gadiyar@ti.com>"); |