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1 | /* |
2 | * drivers/usb/host/ehci-vt8500.c | |
3 | * | |
4 | * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com> | |
5 | * | |
6 | * Based on ehci-au1xxx.c | |
7 | * | |
8 | * This software is licensed under the terms of the GNU General Public | |
9 | * License version 2, as published by the Free Software Foundation, and | |
10 | * may be copied, distributed, and modified under those terms. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | */ | |
18 | ||
19 | #include <linux/platform_device.h> | |
20 | ||
21 | static int ehci_update_device(struct usb_hcd *hcd, struct usb_device *udev) | |
22 | { | |
23 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
24 | int rc = 0; | |
25 | ||
26 | if (!udev->parent) /* udev is root hub itself, impossible */ | |
27 | rc = -1; | |
28 | /* we only support lpm device connected to root hub yet */ | |
29 | if (ehci->has_lpm && !udev->parent->parent) { | |
30 | rc = ehci_lpm_set_da(ehci, udev->devnum, udev->portnum); | |
31 | if (!rc) | |
32 | rc = ehci_lpm_check(ehci, udev->portnum); | |
33 | } | |
34 | return rc; | |
35 | } | |
36 | ||
37 | static const struct hc_driver vt8500_ehci_hc_driver = { | |
38 | .description = hcd_name, | |
39 | .product_desc = "VT8500 EHCI", | |
40 | .hcd_priv_size = sizeof(struct ehci_hcd), | |
41 | ||
42 | /* | |
43 | * generic hardware linkage | |
44 | */ | |
45 | .irq = ehci_irq, | |
46 | .flags = HCD_MEMORY | HCD_USB2, | |
47 | ||
48 | /* | |
49 | * basic lifecycle operations | |
50 | */ | |
51 | .reset = ehci_init, | |
52 | .start = ehci_run, | |
53 | .stop = ehci_stop, | |
54 | .shutdown = ehci_shutdown, | |
55 | ||
56 | /* | |
57 | * managing i/o requests and associated device resources | |
58 | */ | |
59 | .urb_enqueue = ehci_urb_enqueue, | |
60 | .urb_dequeue = ehci_urb_dequeue, | |
61 | .endpoint_disable = ehci_endpoint_disable, | |
62 | .endpoint_reset = ehci_endpoint_reset, | |
63 | ||
64 | /* | |
65 | * scheduling support | |
66 | */ | |
67 | .get_frame_number = ehci_get_frame, | |
68 | ||
69 | /* | |
70 | * root hub support | |
71 | */ | |
72 | .hub_status_data = ehci_hub_status_data, | |
73 | .hub_control = ehci_hub_control, | |
74 | .bus_suspend = ehci_bus_suspend, | |
75 | .bus_resume = ehci_bus_resume, | |
76 | .relinquish_port = ehci_relinquish_port, | |
77 | .port_handed_over = ehci_port_handed_over, | |
78 | ||
79 | /* | |
80 | * call back when device connected and addressed | |
81 | */ | |
82 | .update_device = ehci_update_device, | |
83 | ||
84 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, | |
85 | }; | |
86 | ||
87 | static int vt8500_ehci_drv_probe(struct platform_device *pdev) | |
88 | { | |
89 | struct usb_hcd *hcd; | |
90 | struct ehci_hcd *ehci; | |
91 | struct resource *res; | |
92 | int ret; | |
93 | ||
94 | if (usb_disabled()) | |
95 | return -ENODEV; | |
96 | ||
97 | if (pdev->resource[1].flags != IORESOURCE_IRQ) { | |
98 | pr_debug("resource[1] is not IORESOURCE_IRQ"); | |
99 | return -ENOMEM; | |
100 | } | |
101 | hcd = usb_create_hcd(&vt8500_ehci_hc_driver, &pdev->dev, "VT8500"); | |
102 | if (!hcd) | |
103 | return -ENOMEM; | |
104 | ||
105 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
106 | hcd->rsrc_start = res->start; | |
107 | hcd->rsrc_len = resource_size(res); | |
108 | ||
109 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
110 | pr_debug("request_mem_region failed"); | |
111 | ret = -EBUSY; | |
112 | goto err1; | |
113 | } | |
114 | ||
115 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
116 | if (!hcd->regs) { | |
117 | pr_debug("ioremap failed"); | |
118 | ret = -ENOMEM; | |
119 | goto err2; | |
120 | } | |
121 | ||
122 | ehci = hcd_to_ehci(hcd); | |
123 | ehci->caps = hcd->regs; | |
c430131a JA |
124 | ehci->regs = hcd->regs + |
125 | HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase)); | |
ad78acaf AC |
126 | |
127 | dbg_hcs_params(ehci, "reset"); | |
128 | dbg_hcc_params(ehci, "reset"); | |
129 | ||
130 | /* cache this readonly data; minimize chip reads */ | |
131 | ehci->hcs_params = readl(&ehci->caps->hcs_params); | |
132 | ||
133 | ehci_port_power(ehci, 1); | |
134 | ||
135 | ret = usb_add_hcd(hcd, pdev->resource[1].start, | |
136 | IRQF_DISABLED | IRQF_SHARED); | |
137 | if (ret == 0) { | |
138 | platform_set_drvdata(pdev, hcd); | |
139 | return ret; | |
140 | } | |
141 | ||
142 | iounmap(hcd->regs); | |
143 | err2: | |
144 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
145 | err1: | |
146 | usb_put_hcd(hcd); | |
147 | return ret; | |
148 | } | |
149 | ||
150 | static int vt8500_ehci_drv_remove(struct platform_device *pdev) | |
151 | { | |
152 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
153 | ||
154 | usb_remove_hcd(hcd); | |
155 | iounmap(hcd->regs); | |
156 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
157 | usb_put_hcd(hcd); | |
158 | platform_set_drvdata(pdev, NULL); | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
163 | static struct platform_driver vt8500_ehci_driver = { | |
164 | .probe = vt8500_ehci_drv_probe, | |
165 | .remove = vt8500_ehci_drv_remove, | |
166 | .shutdown = usb_hcd_platform_shutdown, | |
167 | .driver = { | |
168 | .name = "vt8500-ehci", | |
169 | .owner = THIS_MODULE, | |
170 | } | |
171 | }; | |
172 | ||
173 | MODULE_ALIAS("platform:vt8500-ehci"); |