Commit | Line | Data |
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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> | |
cdb2fac7 | 23 | #include <linux/io.h> |
eb70e5ab AS |
24 | #include <linux/usb.h> |
25 | #include <linux/usb/hcd.h> | |
26 | #include <linux/usb/chipidea.h> | |
40ed51a4 | 27 | #include <linux/regulator/consumer.h> |
eb70e5ab | 28 | |
09f6ffde | 29 | #include "../host/ehci.h" |
eb70e5ab AS |
30 | |
31 | #include "ci.h" | |
32 | #include "bits.h" | |
33 | #include "host.h" | |
34 | ||
09f6ffde AS |
35 | static struct hc_driver __read_mostly ci_ehci_hc_driver; |
36 | ||
8e22978c | 37 | static irqreturn_t host_irq(struct ci_hdrc *ci) |
eb70e5ab AS |
38 | { |
39 | return usb_hcd_irq(ci->irq, ci->hcd); | |
40 | } | |
41 | ||
8e22978c | 42 | static int host_start(struct ci_hdrc *ci) |
eb70e5ab AS |
43 | { |
44 | struct usb_hcd *hcd; | |
45 | struct ehci_hcd *ehci; | |
46 | int ret; | |
47 | ||
48 | if (usb_disabled()) | |
49 | return -ENODEV; | |
50 | ||
51 | hcd = usb_create_hcd(&ci_ehci_hc_driver, ci->dev, dev_name(ci->dev)); | |
52 | if (!hcd) | |
53 | return -ENOMEM; | |
54 | ||
55 | dev_set_drvdata(ci->dev, ci); | |
56 | hcd->rsrc_start = ci->hw_bank.phys; | |
57 | hcd->rsrc_len = ci->hw_bank.size; | |
58 | hcd->regs = ci->hw_bank.abs; | |
59 | hcd->has_tt = 1; | |
60 | ||
77c4400f | 61 | hcd->power_budget = ci->platdata->power_budget; |
a2c3d690 | 62 | hcd->phy = ci->transceiver; |
bd841986 | 63 | |
eb70e5ab AS |
64 | ehci = hcd_to_ehci(hcd); |
65 | ehci->caps = ci->hw_bank.cap; | |
66 | ehci->has_hostpc = ci->hw_bank.lpm; | |
2cdcec4f | 67 | ehci->has_tdi_phy_lpm = ci->hw_bank.lpm; |
eb70e5ab | 68 | |
40ed51a4 PC |
69 | if (ci->platdata->reg_vbus) { |
70 | ret = regulator_enable(ci->platdata->reg_vbus); | |
71 | if (ret) { | |
72 | dev_err(ci->dev, | |
73 | "Failed to enable vbus regulator, ret=%d\n", | |
74 | ret); | |
75 | goto put_hcd; | |
76 | } | |
77 | } | |
78 | ||
eb70e5ab AS |
79 | ret = usb_add_hcd(hcd, 0, 0); |
80 | if (ret) | |
40ed51a4 | 81 | goto disable_reg; |
eb70e5ab AS |
82 | else |
83 | ci->hcd = hcd; | |
84 | ||
8e22978c | 85 | if (ci->platdata->flags & CI_HDRC_DISABLE_STREAMING) |
929473ea FE |
86 | hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS); |
87 | ||
eb70e5ab | 88 | return ret; |
40ed51a4 PC |
89 | |
90 | disable_reg: | |
91 | regulator_disable(ci->platdata->reg_vbus); | |
92 | ||
93 | put_hcd: | |
94 | usb_put_hcd(hcd); | |
95 | ||
96 | return ret; | |
eb70e5ab AS |
97 | } |
98 | ||
8e22978c | 99 | static void host_stop(struct ci_hdrc *ci) |
eb70e5ab AS |
100 | { |
101 | struct usb_hcd *hcd = ci->hcd; | |
102 | ||
41314fea RKAL |
103 | if (hcd) { |
104 | usb_remove_hcd(hcd); | |
105 | usb_put_hcd(hcd); | |
df101c53 PC |
106 | if (ci->platdata->reg_vbus) |
107 | regulator_disable(ci->platdata->reg_vbus); | |
41314fea | 108 | } |
eb70e5ab AS |
109 | } |
110 | ||
3f124d23 PC |
111 | |
112 | void ci_hdrc_host_destroy(struct ci_hdrc *ci) | |
113 | { | |
df101c53 | 114 | if (ci->role == CI_ROLE_HOST && ci->hcd) |
3f124d23 PC |
115 | host_stop(ci); |
116 | } | |
117 | ||
8e22978c | 118 | int ci_hdrc_host_init(struct ci_hdrc *ci) |
eb70e5ab AS |
119 | { |
120 | struct ci_role_driver *rdrv; | |
121 | ||
122 | if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC)) | |
123 | return -ENXIO; | |
124 | ||
125 | rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL); | |
126 | if (!rdrv) | |
127 | return -ENOMEM; | |
128 | ||
129 | rdrv->start = host_start; | |
130 | rdrv->stop = host_stop; | |
131 | rdrv->irq = host_irq; | |
132 | rdrv->name = "host"; | |
133 | ci->roles[CI_ROLE_HOST] = rdrv; | |
134 | ||
1b36810e | 135 | ehci_init_driver(&ci_ehci_hc_driver, NULL); |
09f6ffde | 136 | |
eb70e5ab AS |
137 | return 0; |
138 | } |