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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 | |
09f6ffde | 28 | #include "../host/ehci.h" |
eb70e5ab AS |
29 | |
30 | #include "ci.h" | |
31 | #include "bits.h" | |
32 | #include "host.h" | |
33 | ||
09f6ffde AS |
34 | static const struct ehci_driver_overrides ci_overrides = { |
35 | .product_desc = "ChipIdea HDRC EHCI host controller", | |
eb70e5ab AS |
36 | }; |
37 | ||
09f6ffde AS |
38 | static struct hc_driver __read_mostly ci_ehci_hc_driver; |
39 | ||
eb70e5ab AS |
40 | static irqreturn_t host_irq(struct ci13xxx *ci) |
41 | { | |
42 | return usb_hcd_irq(ci->irq, ci->hcd); | |
43 | } | |
44 | ||
45 | static int host_start(struct ci13xxx *ci) | |
46 | { | |
47 | struct usb_hcd *hcd; | |
48 | struct ehci_hcd *ehci; | |
49 | int ret; | |
50 | ||
51 | if (usb_disabled()) | |
52 | return -ENODEV; | |
53 | ||
54 | hcd = usb_create_hcd(&ci_ehci_hc_driver, ci->dev, dev_name(ci->dev)); | |
55 | if (!hcd) | |
56 | return -ENOMEM; | |
57 | ||
58 | dev_set_drvdata(ci->dev, ci); | |
59 | hcd->rsrc_start = ci->hw_bank.phys; | |
60 | hcd->rsrc_len = ci->hw_bank.size; | |
61 | hcd->regs = ci->hw_bank.abs; | |
62 | hcd->has_tt = 1; | |
63 | ||
77c4400f | 64 | hcd->power_budget = ci->platdata->power_budget; |
a2c3d690 | 65 | hcd->phy = ci->transceiver; |
bd841986 | 66 | |
eb70e5ab AS |
67 | ehci = hcd_to_ehci(hcd); |
68 | ehci->caps = ci->hw_bank.cap; | |
69 | ehci->has_hostpc = ci->hw_bank.lpm; | |
70 | ||
71 | ret = usb_add_hcd(hcd, 0, 0); | |
72 | if (ret) | |
a756186b | 73 | usb_put_hcd(hcd); |
eb70e5ab AS |
74 | else |
75 | ci->hcd = hcd; | |
76 | ||
77 | return ret; | |
78 | } | |
79 | ||
80 | static void host_stop(struct ci13xxx *ci) | |
81 | { | |
82 | struct usb_hcd *hcd = ci->hcd; | |
83 | ||
84 | usb_remove_hcd(hcd); | |
85 | usb_put_hcd(hcd); | |
86 | } | |
87 | ||
88 | int ci_hdrc_host_init(struct ci13xxx *ci) | |
89 | { | |
90 | struct ci_role_driver *rdrv; | |
91 | ||
92 | if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC)) | |
93 | return -ENXIO; | |
94 | ||
95 | rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL); | |
96 | if (!rdrv) | |
97 | return -ENOMEM; | |
98 | ||
99 | rdrv->start = host_start; | |
100 | rdrv->stop = host_stop; | |
101 | rdrv->irq = host_irq; | |
102 | rdrv->name = "host"; | |
103 | ci->roles[CI_ROLE_HOST] = rdrv; | |
104 | ||
09f6ffde AS |
105 | ehci_init_driver(&ci_ehci_hc_driver, &ci_overrides); |
106 | ||
eb70e5ab AS |
107 | return 0; |
108 | } |