2 * host.c - ChipIdea USB host controller driver
4 * Copyright (c) 2012 Intel Corporation
6 * Author: Alexander Shishkin
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.
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.
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.
22 #include <linux/kernel.h>
24 #include <linux/usb.h>
25 #include <linux/usb/hcd.h>
26 #include <linux/usb/chipidea.h>
27 #include <linux/regulator/consumer.h>
29 #include "../host/ehci.h"
35 static struct hc_driver __read_mostly ci_ehci_hc_driver
;
37 static irqreturn_t
host_irq(struct ci_hdrc
*ci
)
39 return usb_hcd_irq(ci
->irq
, ci
->hcd
);
42 static int host_start(struct ci_hdrc
*ci
)
45 struct ehci_hcd
*ehci
;
51 hcd
= usb_create_hcd(&ci_ehci_hc_driver
, ci
->dev
, dev_name(ci
->dev
));
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
;
61 hcd
->power_budget
= ci
->platdata
->power_budget
;
62 hcd
->tpl_support
= ci
->platdata
->tpl_support
;
66 hcd
->usb_phy
= ci
->usb_phy
;
68 ehci
= hcd_to_ehci(hcd
);
69 ehci
->caps
= ci
->hw_bank
.cap
;
70 ehci
->has_hostpc
= ci
->hw_bank
.lpm
;
71 ehci
->has_tdi_phy_lpm
= ci
->hw_bank
.lpm
;
72 ehci
->imx28_write_fix
= ci
->imx28_write_fix
;
75 * vbus is always on if host is not in OTG FSM mode,
76 * otherwise should be controlled by OTG FSM
78 if (ci
->platdata
->reg_vbus
&& !ci_otg_is_fsm_mode(ci
)) {
79 ret
= regulator_enable(ci
->platdata
->reg_vbus
);
82 "Failed to enable vbus regulator, ret=%d\n",
88 ret
= usb_add_hcd(hcd
, 0, 0);
92 struct usb_otg
*otg
= &ci
->otg
;
96 if (ci_otg_is_fsm_mode(ci
)) {
97 otg
->host
= &hcd
->self
;
98 hcd
->self
.otg_port
= 1;
102 if (ci
->platdata
->flags
& CI_HDRC_DISABLE_STREAMING
)
103 hw_write(ci
, OP_USBMODE
, USBMODE_CI_SDIS
, USBMODE_CI_SDIS
);
108 if (ci
->platdata
->reg_vbus
&& !ci_otg_is_fsm_mode(ci
))
109 regulator_disable(ci
->platdata
->reg_vbus
);
117 static void host_stop(struct ci_hdrc
*ci
)
119 struct usb_hcd
*hcd
= ci
->hcd
;
124 if (ci
->platdata
->reg_vbus
&& !ci_otg_is_fsm_mode(ci
))
125 regulator_disable(ci
->platdata
->reg_vbus
);
130 void ci_hdrc_host_destroy(struct ci_hdrc
*ci
)
132 if (ci
->role
== CI_ROLE_HOST
&& ci
->hcd
)
136 int ci_hdrc_host_init(struct ci_hdrc
*ci
)
138 struct ci_role_driver
*rdrv
;
140 if (!hw_read(ci
, CAP_DCCPARAMS
, DCCPARAMS_HC
))
143 rdrv
= devm_kzalloc(ci
->dev
, sizeof(struct ci_role_driver
), GFP_KERNEL
);
147 rdrv
->start
= host_start
;
148 rdrv
->stop
= host_stop
;
149 rdrv
->irq
= host_irq
;
151 ci
->roles
[CI_ROLE_HOST
] = rdrv
;
153 ehci_init_driver(&ci_ehci_hc_driver
, NULL
);