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eb70e5ab AS |
1 | /* |
2 | * host.c - ChipIdea USB host controller driver | |
3 | * | |
4 | * Copyright (c) 2012 Intel Corporation | |
5 | * | |
6 | * Author: Alexander Shishkin | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
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 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | */ | |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/usb.h> | |
24 | #include <linux/usb/hcd.h> | |
25 | #include <linux/usb/chipidea.h> | |
26 | ||
27 | #define CHIPIDEA_EHCI | |
28 | #include "../host/ehci-hcd.c" | |
29 | ||
30 | #include "ci.h" | |
31 | #include "bits.h" | |
32 | #include "host.h" | |
33 | ||
34 | static int ci_ehci_setup(struct usb_hcd *hcd) | |
35 | { | |
36 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
37 | int ret; | |
38 | ||
39 | hcd->has_tt = 1; | |
40 | ||
41 | ret = ehci_setup(hcd); | |
42 | if (ret) | |
43 | return ret; | |
44 | ||
45 | ehci_port_power(ehci, 0); | |
46 | ||
47 | return ret; | |
48 | } | |
49 | ||
50 | static const struct hc_driver ci_ehci_hc_driver = { | |
51 | .description = "ehci_hcd", | |
52 | .product_desc = "ChipIdea HDRC EHCI", | |
53 | .hcd_priv_size = sizeof(struct ehci_hcd), | |
54 | ||
55 | /* | |
56 | * generic hardware linkage | |
57 | */ | |
58 | .irq = ehci_irq, | |
59 | .flags = HCD_MEMORY | HCD_USB2, | |
60 | ||
61 | /* | |
62 | * basic lifecycle operations | |
63 | */ | |
64 | .reset = ci_ehci_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 | ||
95 | static irqreturn_t host_irq(struct ci13xxx *ci) | |
96 | { | |
97 | return usb_hcd_irq(ci->irq, ci->hcd); | |
98 | } | |
99 | ||
100 | static int host_start(struct ci13xxx *ci) | |
101 | { | |
102 | struct usb_hcd *hcd; | |
103 | struct ehci_hcd *ehci; | |
104 | int ret; | |
105 | ||
106 | if (usb_disabled()) | |
107 | return -ENODEV; | |
108 | ||
109 | hcd = usb_create_hcd(&ci_ehci_hc_driver, ci->dev, dev_name(ci->dev)); | |
110 | if (!hcd) | |
111 | return -ENOMEM; | |
112 | ||
113 | dev_set_drvdata(ci->dev, ci); | |
114 | hcd->rsrc_start = ci->hw_bank.phys; | |
115 | hcd->rsrc_len = ci->hw_bank.size; | |
116 | hcd->regs = ci->hw_bank.abs; | |
117 | hcd->has_tt = 1; | |
118 | ||
bd841986 AS |
119 | hcd->power_budget = ci->udc_driver->power_budget; |
120 | ||
eb70e5ab AS |
121 | ehci = hcd_to_ehci(hcd); |
122 | ehci->caps = ci->hw_bank.cap; | |
123 | ehci->has_hostpc = ci->hw_bank.lpm; | |
124 | ||
125 | ret = usb_add_hcd(hcd, 0, 0); | |
126 | if (ret) | |
a756186b | 127 | usb_put_hcd(hcd); |
eb70e5ab AS |
128 | else |
129 | ci->hcd = hcd; | |
130 | ||
131 | return ret; | |
132 | } | |
133 | ||
134 | static void host_stop(struct ci13xxx *ci) | |
135 | { | |
136 | struct usb_hcd *hcd = ci->hcd; | |
137 | ||
138 | usb_remove_hcd(hcd); | |
139 | usb_put_hcd(hcd); | |
140 | } | |
141 | ||
142 | int ci_hdrc_host_init(struct ci13xxx *ci) | |
143 | { | |
144 | struct ci_role_driver *rdrv; | |
145 | ||
146 | if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC)) | |
147 | return -ENXIO; | |
148 | ||
149 | rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL); | |
150 | if (!rdrv) | |
151 | return -ENOMEM; | |
152 | ||
153 | rdrv->start = host_start; | |
154 | rdrv->stop = host_stop; | |
155 | rdrv->irq = host_irq; | |
156 | rdrv->name = "host"; | |
157 | ci->roles[CI_ROLE_HOST] = rdrv; | |
158 | ||
159 | return 0; | |
160 | } |