1 /*
2 * MIPS CI13320A EHCI Host Controller driver
3 * Based on "ehci-au1xxx.c" by K.Boge <karsten.boge@amd.com>
4 *
5 * Copyright (C) 2012 MIPS Technologies, Inc.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software Foundation,
19 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22 #include <linux/err.h>
23 #include <linux/platform_device.h>
24
ehci_sead3_setup(struct usb_hcd * hcd)25 static int ehci_sead3_setup(struct usb_hcd *hcd)
26 {
27 int ret;
28 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
29
30 ehci->caps = hcd->regs + 0x100;
31
32 #ifdef __BIG_ENDIAN
33 ehci->big_endian_mmio = 1;
34 ehci->big_endian_desc = 1;
35 #endif
36
37 ret = ehci_setup(hcd);
38 if (ret)
39 return ret;
40
41 ehci->need_io_watchdog = 0;
42
43 /* Set burst length to 16 words. */
44 ehci_writel(ehci, 0x1010, &ehci->regs->reserved1[1]);
45
46 return ret;
47 }
48
49 const struct hc_driver ehci_sead3_hc_driver = {
50 .description = hcd_name,
51 .product_desc = "SEAD-3 EHCI",
52 .hcd_priv_size = sizeof(struct ehci_hcd),
53
54 /*
55 * generic hardware linkage
56 */
57 .irq = ehci_irq,
58 .flags = HCD_MEMORY | HCD_USB2 | HCD_BH,
59
60 /*
61 * basic lifecycle operations
62 *
63 */
64 .reset = ehci_sead3_setup,
65 .start = ehci_run,
66 .stop = ehci_stop,
67 .shutdown = ehci_shutdown,
68
69 /*
70 * managing i/o requests and associated device resources
71 */
72 .urb_enqueue = ehci_urb_enqueue,
73 .urb_dequeue = ehci_urb_dequeue,
74 .endpoint_disable = ehci_endpoint_disable,
75 .endpoint_reset = ehci_endpoint_reset,
76
77 /*
78 * scheduling support
79 */
80 .get_frame_number = ehci_get_frame,
81
82 /*
83 * root hub support
84 */
85 .hub_status_data = ehci_hub_status_data,
86 .hub_control = ehci_hub_control,
87 .bus_suspend = ehci_bus_suspend,
88 .bus_resume = ehci_bus_resume,
89 .relinquish_port = ehci_relinquish_port,
90 .port_handed_over = ehci_port_handed_over,
91
92 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
93 };
94
ehci_hcd_sead3_drv_probe(struct platform_device * pdev)95 static int ehci_hcd_sead3_drv_probe(struct platform_device *pdev)
96 {
97 struct usb_hcd *hcd;
98 struct resource *res;
99 int ret;
100
101 if (usb_disabled())
102 return -ENODEV;
103
104 if (pdev->resource[1].flags != IORESOURCE_IRQ) {
105 pr_debug("resource[1] is not IORESOURCE_IRQ");
106 return -ENOMEM;
107 }
108 hcd = usb_create_hcd(&ehci_sead3_hc_driver, &pdev->dev, "SEAD-3");
109 if (!hcd)
110 return -ENOMEM;
111
112 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
113 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
114 if (IS_ERR(hcd->regs)) {
115 ret = PTR_ERR(hcd->regs);
116 goto err1;
117 }
118 hcd->rsrc_start = res->start;
119 hcd->rsrc_len = resource_size(res);
120
121 /* Root hub has integrated TT. */
122 hcd->has_tt = 1;
123
124 ret = usb_add_hcd(hcd, pdev->resource[1].start,
125 IRQF_SHARED);
126 if (ret == 0) {
127 platform_set_drvdata(pdev, hcd);
128 device_wakeup_enable(hcd->self.controller);
129 return ret;
130 }
131
132 err1:
133 usb_put_hcd(hcd);
134 return ret;
135 }
136
ehci_hcd_sead3_drv_remove(struct platform_device * pdev)137 static int ehci_hcd_sead3_drv_remove(struct platform_device *pdev)
138 {
139 struct usb_hcd *hcd = platform_get_drvdata(pdev);
140
141 usb_remove_hcd(hcd);
142 usb_put_hcd(hcd);
143
144 return 0;
145 }
146
147 #ifdef CONFIG_PM
ehci_hcd_sead3_drv_suspend(struct device * dev)148 static int ehci_hcd_sead3_drv_suspend(struct device *dev)
149 {
150 struct usb_hcd *hcd = dev_get_drvdata(dev);
151 bool do_wakeup = device_may_wakeup(dev);
152
153 return ehci_suspend(hcd, do_wakeup);
154 }
155
ehci_hcd_sead3_drv_resume(struct device * dev)156 static int ehci_hcd_sead3_drv_resume(struct device *dev)
157 {
158 struct usb_hcd *hcd = dev_get_drvdata(dev);
159
160 ehci_resume(hcd, false);
161 return 0;
162 }
163
164 static const struct dev_pm_ops sead3_ehci_pmops = {
165 .suspend = ehci_hcd_sead3_drv_suspend,
166 .resume = ehci_hcd_sead3_drv_resume,
167 };
168
169 #define SEAD3_EHCI_PMOPS (&sead3_ehci_pmops)
170
171 #else
172 #define SEAD3_EHCI_PMOPS NULL
173 #endif
174
175 static struct platform_driver ehci_hcd_sead3_driver = {
176 .probe = ehci_hcd_sead3_drv_probe,
177 .remove = ehci_hcd_sead3_drv_remove,
178 .shutdown = usb_hcd_platform_shutdown,
179 .driver = {
180 .name = "sead3-ehci",
181 .pm = SEAD3_EHCI_PMOPS,
182 }
183 };
184
185 MODULE_ALIAS("platform:sead3-ehci");
186