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1/* ehci-msm.c - HSUSB Host Controller Driver Implementation
2 *
3 * Copyright (c) 2008-2011, Code Aurora Forum. All rights reserved.
4 *
5 * Partly derived from ehci-fsl.c and ehci-hcd.c
6 * Copyright (c) 2000-2004 by David Brownell
7 * Copyright (c) 2005 MontaVista Software
8 *
9 * All source code in this file is licensed under the following license except
10 * where indicated.
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License version 2 as published
14 * by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
19 *
20 * See the GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, you can find it at http://www.fsf.org
23 */
24
25#include <linux/clk.h>
26#include <linux/err.h>
27#include <linux/io.h>
28#include <linux/kernel.h>
29#include <linux/module.h>
30#include <linux/platform_device.h>
31#include <linux/pm_runtime.h>
32#include <linux/usb/otg.h>
33#include <linux/usb/msm_hsusb_hw.h>
34#include <linux/usb.h>
35#include <linux/usb/hcd.h>
36
37#include "ehci.h"
38
39#define MSM_USB_BASE (hcd->regs)
40
41#define DRIVER_DESC "Qualcomm On-Chip EHCI Host Controller"
42
43static const char hcd_name[] = "ehci-msm";
44static struct hc_driver __read_mostly msm_hc_driver;
45
46static int ehci_msm_reset(struct usb_hcd *hcd)
47{
48 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
49 int retval;
50
51 ehci->caps = USB_CAPLENGTH;
52 hcd->has_tt = 1;
53
54 retval = ehci_setup(hcd);
55 if (retval)
56 return retval;
57
58 /* bursts of unspecified length. */
59 writel(0, USB_AHBBURST);
60 /* Use the AHB transactor */
61 writel(0, USB_AHBMODE);
62 /* Disable streaming mode and select host mode */
63 writel(0x13, USB_USBMODE);
64
65 return 0;
66}
67
68static int ehci_msm_probe(struct platform_device *pdev)
69{
70 struct usb_hcd *hcd;
71 struct resource *res;
72 struct usb_phy *phy;
73 int ret;
74
75 dev_dbg(&pdev->dev, "ehci_msm proble\n");
76
77 hcd = usb_create_hcd(&msm_hc_driver, &pdev->dev, dev_name(&pdev->dev));
78 if (!hcd) {
79 dev_err(&pdev->dev, "Unable to create HCD\n");
80 return -ENOMEM;
81 }
82
83 hcd->irq = platform_get_irq(pdev, 0);
84 if (hcd->irq < 0) {
85 dev_err(&pdev->dev, "Unable to get IRQ resource\n");
86 ret = hcd->irq;
87 goto put_hcd;
88 }
89
90 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
91 if (!res) {
92 dev_err(&pdev->dev, "Unable to get memory resource\n");
93 ret = -ENODEV;
94 goto put_hcd;
95 }
96
97 hcd->rsrc_start = res->start;
98 hcd->rsrc_len = resource_size(res);
99 hcd->regs = devm_ioremap(&pdev->dev, hcd->rsrc_start, hcd->rsrc_len);
100 if (!hcd->regs) {
101 dev_err(&pdev->dev, "ioremap failed\n");
102 ret = -ENOMEM;
103 goto put_hcd;
104 }
105
106 /*
107 * OTG driver takes care of PHY initialization, clock management,
108 * powering up VBUS, mapping of registers address space and power
109 * management.
110 */
111 if (pdev->dev.of_node)
112 phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
113 else
114 phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
115
116 if (IS_ERR(phy)) {
117 dev_err(&pdev->dev, "unable to find transceiver\n");
118 ret = -EPROBE_DEFER;
119 goto put_hcd;
120 }
121
122 ret = otg_set_host(phy->otg, &hcd->self);
123 if (ret < 0) {
124 dev_err(&pdev->dev, "unable to register with transceiver\n");
125 goto put_hcd;
126 }
127
128 hcd->phy = phy;
129 device_init_wakeup(&pdev->dev, 1);
130 /*
131 * OTG device parent of HCD takes care of putting
132 * hardware into low power mode.
133 */
134 pm_runtime_no_callbacks(&pdev->dev);
135 pm_runtime_enable(&pdev->dev);
136
137 /* FIXME: need to call usb_add_hcd() here? */
138
139 return 0;
140
141put_hcd:
142 usb_put_hcd(hcd);
143
144 return ret;
145}
146
147static int ehci_msm_remove(struct platform_device *pdev)
148{
149 struct usb_hcd *hcd = platform_get_drvdata(pdev);
150
151 device_init_wakeup(&pdev->dev, 0);
152 pm_runtime_disable(&pdev->dev);
153 pm_runtime_set_suspended(&pdev->dev);
154
155 otg_set_host(hcd->phy->otg, NULL);
156
157 /* FIXME: need to call usb_remove_hcd() here? */
158
159 usb_put_hcd(hcd);
160
161 return 0;
162}
163
164#ifdef CONFIG_PM
165static int ehci_msm_pm_suspend(struct device *dev)
166{
167 struct usb_hcd *hcd = dev_get_drvdata(dev);
168 bool do_wakeup = device_may_wakeup(dev);
169
170 dev_dbg(dev, "ehci-msm PM suspend\n");
171
172 return ehci_suspend(hcd, do_wakeup);
173}
174
175static int ehci_msm_pm_resume(struct device *dev)
176{
177 struct usb_hcd *hcd = dev_get_drvdata(dev);
178
179 dev_dbg(dev, "ehci-msm PM resume\n");
180 ehci_resume(hcd, false);
181
182 return 0;
183}
184#else
185#define ehci_msm_pm_suspend NULL
186#define ehci_msm_pm_resume NULL
187#endif
188
189static const struct dev_pm_ops ehci_msm_dev_pm_ops = {
190 .suspend = ehci_msm_pm_suspend,
191 .resume = ehci_msm_pm_resume,
192};
193
194static struct of_device_id msm_ehci_dt_match[] = {
195 { .compatible = "qcom,ehci-host", },
196 {}
197};
198MODULE_DEVICE_TABLE(of, msm_ehci_dt_match);
199
200static struct platform_driver ehci_msm_driver = {
201 .probe = ehci_msm_probe,
202 .remove = ehci_msm_remove,
203 .driver = {
204 .name = "msm_hsusb_host",
205 .pm = &ehci_msm_dev_pm_ops,
206 .of_match_table = msm_ehci_dt_match,
207 },
208};
209
210static const struct ehci_driver_overrides msm_overrides __initdata = {
211 .reset = ehci_msm_reset,
212};
213
214static int __init ehci_msm_init(void)
215{
216 if (usb_disabled())
217 return -ENODEV;
218
219 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
220 ehci_init_driver(&msm_hc_driver, &msm_overrides);
221 return platform_driver_register(&ehci_msm_driver);
222}
223module_init(ehci_msm_init);
224
225static void __exit ehci_msm_cleanup(void)
226{
227 platform_driver_unregister(&ehci_msm_driver);
228}
229module_exit(ehci_msm_cleanup);
230
231MODULE_DESCRIPTION(DRIVER_DESC);
232MODULE_ALIAS("platform:msm-ehci");
233MODULE_LICENSE("GPL");
1/* ehci-msm.c - HSUSB Host Controller Driver Implementation
2 *
3 * Copyright (c) 2008-2011, Code Aurora Forum. All rights reserved.
4 *
5 * Partly derived from ehci-fsl.c and ehci-hcd.c
6 * Copyright (c) 2000-2004 by David Brownell
7 * Copyright (c) 2005 MontaVista Software
8 *
9 * All source code in this file is licensed under the following license except
10 * where indicated.
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License version 2 as published
14 * by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
19 *
20 * See the GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, you can find it at http://www.fsf.org
23 */
24
25#include <linux/platform_device.h>
26#include <linux/clk.h>
27#include <linux/err.h>
28#include <linux/pm_runtime.h>
29
30#include <linux/usb/otg.h>
31#include <linux/usb/msm_hsusb_hw.h>
32
33#define MSM_USB_BASE (hcd->regs)
34
35static struct otg_transceiver *otg;
36
37static int ehci_msm_reset(struct usb_hcd *hcd)
38{
39 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
40 int retval;
41
42 ehci->caps = USB_CAPLENGTH;
43 hcd->has_tt = 1;
44
45 retval = ehci_setup(hcd);
46 if (retval)
47 return retval;
48
49 /* bursts of unspecified length. */
50 writel(0, USB_AHBBURST);
51 /* Use the AHB transactor */
52 writel(0, USB_AHBMODE);
53 /* Disable streaming mode and select host mode */
54 writel(0x13, USB_USBMODE);
55
56 ehci_port_power(ehci, 1);
57 return 0;
58}
59
60static struct hc_driver msm_hc_driver = {
61 .description = hcd_name,
62 .product_desc = "Qualcomm On-Chip EHCI Host Controller",
63 .hcd_priv_size = sizeof(struct ehci_hcd),
64
65 /*
66 * generic hardware linkage
67 */
68 .irq = ehci_irq,
69 .flags = HCD_USB2 | HCD_MEMORY,
70
71 .reset = ehci_msm_reset,
72 .start = ehci_run,
73
74 .stop = ehci_stop,
75 .shutdown = ehci_shutdown,
76
77 /*
78 * managing i/o requests and associated device resources
79 */
80 .urb_enqueue = ehci_urb_enqueue,
81 .urb_dequeue = ehci_urb_dequeue,
82 .endpoint_disable = ehci_endpoint_disable,
83 .endpoint_reset = ehci_endpoint_reset,
84 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
85
86 /*
87 * scheduling support
88 */
89 .get_frame_number = ehci_get_frame,
90
91 /*
92 * root hub support
93 */
94 .hub_status_data = ehci_hub_status_data,
95 .hub_control = ehci_hub_control,
96 .relinquish_port = ehci_relinquish_port,
97 .port_handed_over = ehci_port_handed_over,
98
99 /*
100 * PM support
101 */
102 .bus_suspend = ehci_bus_suspend,
103 .bus_resume = ehci_bus_resume,
104};
105
106static int ehci_msm_probe(struct platform_device *pdev)
107{
108 struct usb_hcd *hcd;
109 struct resource *res;
110 int ret;
111
112 dev_dbg(&pdev->dev, "ehci_msm proble\n");
113
114 hcd = usb_create_hcd(&msm_hc_driver, &pdev->dev, dev_name(&pdev->dev));
115 if (!hcd) {
116 dev_err(&pdev->dev, "Unable to create HCD\n");
117 return -ENOMEM;
118 }
119
120 hcd->irq = platform_get_irq(pdev, 0);
121 if (hcd->irq < 0) {
122 dev_err(&pdev->dev, "Unable to get IRQ resource\n");
123 ret = hcd->irq;
124 goto put_hcd;
125 }
126
127 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
128 if (!res) {
129 dev_err(&pdev->dev, "Unable to get memory resource\n");
130 ret = -ENODEV;
131 goto put_hcd;
132 }
133
134 hcd->rsrc_start = res->start;
135 hcd->rsrc_len = resource_size(res);
136 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
137 if (!hcd->regs) {
138 dev_err(&pdev->dev, "ioremap failed\n");
139 ret = -ENOMEM;
140 goto put_hcd;
141 }
142
143 /*
144 * OTG driver takes care of PHY initialization, clock management,
145 * powering up VBUS, mapping of registers address space and power
146 * management.
147 */
148 otg = otg_get_transceiver();
149 if (!otg) {
150 dev_err(&pdev->dev, "unable to find transceiver\n");
151 ret = -ENODEV;
152 goto unmap;
153 }
154
155 ret = otg_set_host(otg, &hcd->self);
156 if (ret < 0) {
157 dev_err(&pdev->dev, "unable to register with transceiver\n");
158 goto put_transceiver;
159 }
160
161 device_init_wakeup(&pdev->dev, 1);
162 /*
163 * OTG device parent of HCD takes care of putting
164 * hardware into low power mode.
165 */
166 pm_runtime_no_callbacks(&pdev->dev);
167 pm_runtime_enable(&pdev->dev);
168
169 return 0;
170
171put_transceiver:
172 otg_put_transceiver(otg);
173unmap:
174 iounmap(hcd->regs);
175put_hcd:
176 usb_put_hcd(hcd);
177
178 return ret;
179}
180
181static int __devexit ehci_msm_remove(struct platform_device *pdev)
182{
183 struct usb_hcd *hcd = platform_get_drvdata(pdev);
184
185 device_init_wakeup(&pdev->dev, 0);
186 pm_runtime_disable(&pdev->dev);
187 pm_runtime_set_suspended(&pdev->dev);
188
189 otg_set_host(otg, NULL);
190 otg_put_transceiver(otg);
191
192 usb_put_hcd(hcd);
193
194 return 0;
195}
196
197#ifdef CONFIG_PM
198static int ehci_msm_pm_suspend(struct device *dev)
199{
200 struct usb_hcd *hcd = dev_get_drvdata(dev);
201 bool wakeup = device_may_wakeup(dev);
202
203 dev_dbg(dev, "ehci-msm PM suspend\n");
204
205 /*
206 * EHCI helper function has also the same check before manipulating
207 * port wakeup flags. We do check here the same condition before
208 * calling the same helper function to avoid bringing hardware
209 * from Low power mode when there is no need for adjusting port
210 * wakeup flags.
211 */
212 if (hcd->self.root_hub->do_remote_wakeup && !wakeup) {
213 pm_runtime_resume(dev);
214 ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
215 wakeup);
216 }
217
218 return 0;
219}
220
221static int ehci_msm_pm_resume(struct device *dev)
222{
223 struct usb_hcd *hcd = dev_get_drvdata(dev);
224
225 dev_dbg(dev, "ehci-msm PM resume\n");
226 ehci_prepare_ports_for_controller_resume(hcd_to_ehci(hcd));
227
228 return 0;
229}
230#else
231#define ehci_msm_pm_suspend NULL
232#define ehci_msm_pm_resume NULL
233#endif
234
235static const struct dev_pm_ops ehci_msm_dev_pm_ops = {
236 .suspend = ehci_msm_pm_suspend,
237 .resume = ehci_msm_pm_resume,
238};
239
240static struct platform_driver ehci_msm_driver = {
241 .probe = ehci_msm_probe,
242 .remove = __devexit_p(ehci_msm_remove),
243 .driver = {
244 .name = "msm_hsusb_host",
245 .pm = &ehci_msm_dev_pm_ops,
246 },
247};