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->phy = ci->transceiver;
64 ehci = hcd_to_ehci(hcd);
65 ehci->caps = ci->hw_bank.cap;
66 ehci->has_hostpc = ci->hw_bank.lpm;
67 ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
68 ehci->imx28_write_fix = ci->imx28_write_fix;
71 * vbus is always on if host is not in OTG FSM mode,
72 * otherwise should be controlled by OTG FSM
74 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
75 ret = regulator_enable(ci->platdata->reg_vbus);
78 "Failed to enable vbus regulator, ret=%d\n",
84 ret = usb_add_hcd(hcd, 0, 0);
88 struct usb_otg *otg = ci->transceiver->otg;
92 otg->host = &hcd->self;
93 hcd->self.otg_port = 1;
97 if (ci->platdata->flags & CI_HDRC_DISABLE_STREAMING)
98 hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
103 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci))
104 regulator_disable(ci->platdata->reg_vbus);
112 static void host_stop(struct ci_hdrc *ci)
114 struct usb_hcd *hcd = ci->hcd;
119 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci))
120 regulator_disable(ci->platdata->reg_vbus);
125 void ci_hdrc_host_destroy(struct ci_hdrc *ci)
127 if (ci->role == CI_ROLE_HOST && ci->hcd)
131 int ci_hdrc_host_init(struct ci_hdrc *ci)
133 struct ci_role_driver *rdrv;
135 if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
138 rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
142 rdrv->start = host_start;
143 rdrv->stop = host_stop;
144 rdrv->irq = host_irq;
146 ci->roles[CI_ROLE_HOST] = rdrv;
148 ehci_init_driver(&ci_ehci_hc_driver, NULL);