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Alexander Shishkineb70e5a2012-05-11 17:25:54 +03001/*
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>
Alan Sterncdb2fac2012-11-03 12:39:27 -040023#include <linux/io.h>
Alexander Shishkineb70e5a2012-05-11 17:25:54 +030024#include <linux/usb.h>
25#include <linux/usb/hcd.h>
26#include <linux/usb/chipidea.h>
Peter Chen40ed51a2013-08-14 12:44:04 +030027#include <linux/regulator/consumer.h>
Alexander Shishkineb70e5a2012-05-11 17:25:54 +030028
Alan Stern09f6ffd2012-11-02 12:34:41 -040029#include "../host/ehci.h"
Alexander Shishkineb70e5a2012-05-11 17:25:54 +030030
31#include "ci.h"
32#include "bits.h"
33#include "host.h"
34
Alan Stern09f6ffd2012-11-02 12:34:41 -040035static struct hc_driver __read_mostly ci_ehci_hc_driver;
36
Alexander Shishkin8e229782013-06-24 14:46:36 +030037static irqreturn_t host_irq(struct ci_hdrc *ci)
Alexander Shishkineb70e5a2012-05-11 17:25:54 +030038{
39 return usb_hcd_irq(ci->irq, ci->hcd);
40}
41
Alexander Shishkin8e229782013-06-24 14:46:36 +030042static int host_start(struct ci_hdrc *ci)
Alexander Shishkineb70e5a2012-05-11 17:25:54 +030043{
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
Richard Zhao77c44002012-06-29 17:48:53 +080061 hcd->power_budget = ci->platdata->power_budget;
Richard Zhaoa2c3d692012-07-07 22:56:46 +080062 hcd->phy = ci->transceiver;
Alexander Shishkinbd841982012-05-11 17:25:55 +030063
Alexander Shishkineb70e5a2012-05-11 17:25:54 +030064 ehci = hcd_to_ehci(hcd);
65 ehci->caps = ci->hw_bank.cap;
66 ehci->has_hostpc = ci->hw_bank.lpm;
Tuomas Tynkkynen2cdcec42013-08-12 16:06:49 +030067 ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
Alexander Shishkineb70e5a2012-05-11 17:25:54 +030068
Peter Chen40ed51a2013-08-14 12:44:04 +030069 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
Alexander Shishkineb70e5a2012-05-11 17:25:54 +030079 ret = usb_add_hcd(hcd, 0, 0);
80 if (ret)
Peter Chen40ed51a2013-08-14 12:44:04 +030081 goto disable_reg;
Alexander Shishkineb70e5a2012-05-11 17:25:54 +030082 else
83 ci->hcd = hcd;
84
Alexander Shishkin8e229782013-06-24 14:46:36 +030085 if (ci->platdata->flags & CI_HDRC_DISABLE_STREAMING)
Fabio Estevam929473e2012-12-22 09:24:11 -020086 hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
87
Alexander Shishkineb70e5a2012-05-11 17:25:54 +030088 return ret;
Peter Chen40ed51a2013-08-14 12:44:04 +030089
90disable_reg:
91 regulator_disable(ci->platdata->reg_vbus);
92
93put_hcd:
94 usb_put_hcd(hcd);
95
96 return ret;
Alexander Shishkineb70e5a2012-05-11 17:25:54 +030097}
98
Alexander Shishkin8e229782013-06-24 14:46:36 +030099static void host_stop(struct ci_hdrc *ci)
Alexander Shishkineb70e5a2012-05-11 17:25:54 +0300100{
101 struct usb_hcd *hcd = ci->hcd;
102
Russell King - ARM Linux41314fe2013-10-16 13:45:15 +0100103 if (hcd) {
104 usb_remove_hcd(hcd);
105 usb_put_hcd(hcd);
106 }
Peter Chen40ed51a2013-08-14 12:44:04 +0300107 if (ci->platdata->reg_vbus)
108 regulator_disable(ci->platdata->reg_vbus);
Alexander Shishkineb70e5a2012-05-11 17:25:54 +0300109}
110
Peter Chen3f124d22013-08-14 12:44:07 +0300111
112void ci_hdrc_host_destroy(struct ci_hdrc *ci)
113{
114 if (ci->role == CI_ROLE_HOST)
115 host_stop(ci);
116}
117
Alexander Shishkin8e229782013-06-24 14:46:36 +0300118int ci_hdrc_host_init(struct ci_hdrc *ci)
Alexander Shishkineb70e5a2012-05-11 17:25:54 +0300119{
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
Alan Stern1b368102012-11-07 16:12:47 -0500135 ehci_init_driver(&ci_ehci_hc_driver, NULL);
Alan Stern09f6ffd2012-11-02 12:34:41 -0400136
Alexander Shishkineb70e5a2012-05-11 17:25:54 +0300137 return 0;
138}