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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;
Peter Chen78f03572015-02-11 12:44:59 +080036static int (*orig_bus_suspend)(struct usb_hcd *hcd);
Alan Stern09f6ffd2012-11-02 12:34:41 -040037
Michael Grzeschikc8679a22014-10-13 09:53:04 +080038struct ehci_ci_priv {
39 struct regulator *reg_vbus;
40};
41
42static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable)
43{
44 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
45 struct ehci_ci_priv *priv = (struct ehci_ci_priv *)ehci->priv;
46 struct device *dev = hcd->self.controller;
Peter Chen1311d6e2015-07-14 15:43:02 +080047 struct ci_hdrc *ci = dev_get_drvdata(dev);
Michael Grzeschikc8679a22014-10-13 09:53:04 +080048 int ret = 0;
49 int port = HCS_N_PORTS(ehci->hcs_params);
50
Li Jun65945912015-02-11 12:45:02 +080051 if (priv->reg_vbus) {
Michael Grzeschikc8679a22014-10-13 09:53:04 +080052 if (port > 1) {
53 dev_warn(dev,
54 "Not support multi-port regulator control\n");
55 return 0;
56 }
57 if (enable)
58 ret = regulator_enable(priv->reg_vbus);
59 else
60 ret = regulator_disable(priv->reg_vbus);
61 if (ret) {
62 dev_err(dev,
63 "Failed to %s vbus regulator, ret=%d\n",
64 enable ? "enable" : "disable", ret);
65 return ret;
66 }
67 }
Rob Herringfc6b68b2015-05-29 11:38:46 -050068
69 if (enable && (ci->platdata->phy_mode == USBPHY_INTERFACE_MODE_HSIC)) {
70 /*
71 * Marvell 28nm HSIC PHY requires forcing the port to HS mode.
72 * As HSIC is always HS, this should be safe for others.
73 */
74 hw_port_test_set(ci, 5);
75 hw_port_test_set(ci, 0);
76 }
Michael Grzeschikc8679a22014-10-13 09:53:04 +080077 return 0;
78};
79
80static const struct ehci_driver_overrides ehci_ci_overrides = {
81 .extra_priv_size = sizeof(struct ehci_ci_priv),
82 .port_power = ehci_ci_portpower,
83};
84
Alexander Shishkin8e229782013-06-24 14:46:36 +030085static irqreturn_t host_irq(struct ci_hdrc *ci)
Alexander Shishkineb70e5a2012-05-11 17:25:54 +030086{
87 return usb_hcd_irq(ci->irq, ci->hcd);
88}
89
Alexander Shishkin8e229782013-06-24 14:46:36 +030090static int host_start(struct ci_hdrc *ci)
Alexander Shishkineb70e5a2012-05-11 17:25:54 +030091{
92 struct usb_hcd *hcd;
93 struct ehci_hcd *ehci;
Michael Grzeschikc8679a22014-10-13 09:53:04 +080094 struct ehci_ci_priv *priv;
Alexander Shishkineb70e5a2012-05-11 17:25:54 +030095 int ret;
96
97 if (usb_disabled())
98 return -ENODEV;
99
100 hcd = usb_create_hcd(&ci_ehci_hc_driver, ci->dev, dev_name(ci->dev));
101 if (!hcd)
102 return -ENOMEM;
103
Peter Chen24c498d2014-12-24 11:33:17 +0800104 dev_set_drvdata(ci->dev, ci);
Alexander Shishkineb70e5a2012-05-11 17:25:54 +0300105 hcd->rsrc_start = ci->hw_bank.phys;
106 hcd->rsrc_len = ci->hw_bank.size;
107 hcd->regs = ci->hw_bank.abs;
108 hcd->has_tt = 1;
109
Richard Zhao77c44002012-06-29 17:48:53 +0800110 hcd->power_budget = ci->platdata->power_budget;
Peter Chenf6a9ff02014-08-19 09:51:56 +0800111 hcd->tpl_support = ci->platdata->tpl_support;
Antoine Tenart1e5e2d32014-10-30 18:41:19 +0100112 if (ci->phy)
113 hcd->phy = ci->phy;
114 else
115 hcd->usb_phy = ci->usb_phy;
Alexander Shishkinbd841982012-05-11 17:25:55 +0300116
Alexander Shishkineb70e5a2012-05-11 17:25:54 +0300117 ehci = hcd_to_ehci(hcd);
118 ehci->caps = ci->hw_bank.cap;
119 ehci->has_hostpc = ci->hw_bank.lpm;
Tuomas Tynkkynen2cdcec42013-08-12 16:06:49 +0300120 ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
Peter Chened8f8312014-01-10 13:51:27 +0800121 ehci->imx28_write_fix = ci->imx28_write_fix;
Alexander Shishkineb70e5a2012-05-11 17:25:54 +0300122
Michael Grzeschikc8679a22014-10-13 09:53:04 +0800123 priv = (struct ehci_ci_priv *)ehci->priv;
124 priv->reg_vbus = NULL;
125
Li Jun65945912015-02-11 12:45:02 +0800126 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
127 if (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON) {
128 ret = regulator_enable(ci->platdata->reg_vbus);
129 if (ret) {
130 dev_err(ci->dev,
131 "Failed to enable vbus regulator, ret=%d\n",
132 ret);
133 goto put_hcd;
134 }
135 } else {
136 priv->reg_vbus = ci->platdata->reg_vbus;
137 }
138 }
Peter Chen40ed51a2013-08-14 12:44:04 +0300139
Alexander Shishkineb70e5a2012-05-11 17:25:54 +0300140 ret = usb_add_hcd(hcd, 0, 0);
Li Jun0698b9b2014-04-23 15:56:46 +0800141 if (ret) {
Li Jun65945912015-02-11 12:45:02 +0800142 goto disable_reg;
Li Jun0698b9b2014-04-23 15:56:46 +0800143 } else {
Antoine Tenartef44cb42014-10-30 18:41:16 +0100144 struct usb_otg *otg = &ci->otg;
Li Jun0698b9b2014-04-23 15:56:46 +0800145
Alexander Shishkineb70e5a2012-05-11 17:25:54 +0300146 ci->hcd = hcd;
Antoine Tenartef44cb42014-10-30 18:41:16 +0100147
148 if (ci_otg_is_fsm_mode(ci)) {
Li Jun0698b9b2014-04-23 15:56:46 +0800149 otg->host = &hcd->self;
150 hcd->self.otg_port = 1;
151 }
152 }
Alexander Shishkineb70e5a2012-05-11 17:25:54 +0300153
Peter Chenbf9c85e2015-03-17 10:40:50 +0800154 ci_platform_configure(ci);
Peter Chen28362672015-06-18 11:51:53 +0800155
Alexander Shishkineb70e5a2012-05-11 17:25:54 +0300156 return ret;
Peter Chen40ed51a2013-08-14 12:44:04 +0300157
Li Jun65945912015-02-11 12:45:02 +0800158disable_reg:
159 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
160 (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
161 regulator_disable(ci->platdata->reg_vbus);
Peter Chen40ed51a2013-08-14 12:44:04 +0300162put_hcd:
163 usb_put_hcd(hcd);
164
165 return ret;
Alexander Shishkineb70e5a2012-05-11 17:25:54 +0300166}
167
Alexander Shishkin8e229782013-06-24 14:46:36 +0300168static void host_stop(struct ci_hdrc *ci)
Alexander Shishkineb70e5a2012-05-11 17:25:54 +0300169{
170 struct usb_hcd *hcd = ci->hcd;
171
Russell King - ARM Linux41314fe2013-10-16 13:45:15 +0100172 if (hcd) {
173 usb_remove_hcd(hcd);
174 usb_put_hcd(hcd);
Li Jun65945912015-02-11 12:45:02 +0800175 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
176 (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
177 regulator_disable(ci->platdata->reg_vbus);
Russell King - ARM Linux41314fe2013-10-16 13:45:15 +0100178 }
Alexander Shishkineb70e5a2012-05-11 17:25:54 +0300179}
180
Peter Chen3f124d22013-08-14 12:44:07 +0300181
182void ci_hdrc_host_destroy(struct ci_hdrc *ci)
183{
Peter Chendf101c52013-10-22 11:13:41 +0800184 if (ci->role == CI_ROLE_HOST && ci->hcd)
Peter Chen3f124d22013-08-14 12:44:07 +0300185 host_stop(ci);
186}
187
Peter Chen78f03572015-02-11 12:44:59 +0800188static int ci_ehci_bus_suspend(struct usb_hcd *hcd)
189{
190 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
191 int port;
192 u32 tmp;
193
194 int ret = orig_bus_suspend(hcd);
195
196 if (ret)
197 return ret;
198
199 port = HCS_N_PORTS(ehci->hcs_params);
200 while (port--) {
201 u32 __iomem *reg = &ehci->regs->port_status[port];
202 u32 portsc = ehci_readl(ehci, reg);
203
204 if (portsc & PORT_CONNECT) {
205 /*
206 * For chipidea, the resume signal will be ended
207 * automatically, so for remote wakeup case, the
208 * usbcmd.rs may not be set before the resume has
209 * ended if other resume paths consumes too much
210 * time (~24ms), in that case, the SOF will not
211 * send out within 3ms after resume ends, then the
212 * high speed device will enter full speed mode.
213 */
214
215 tmp = ehci_readl(ehci, &ehci->regs->command);
216 tmp |= CMD_RUN;
217 ehci_writel(ehci, tmp, &ehci->regs->command);
218 /*
219 * It needs a short delay between set RS bit and PHCD.
220 */
221 usleep_range(150, 200);
222 break;
223 }
224 }
225
226 return 0;
227}
228
Alexander Shishkin8e229782013-06-24 14:46:36 +0300229int ci_hdrc_host_init(struct ci_hdrc *ci)
Alexander Shishkineb70e5a2012-05-11 17:25:54 +0300230{
231 struct ci_role_driver *rdrv;
232
233 if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
234 return -ENXIO;
235
236 rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
237 if (!rdrv)
238 return -ENOMEM;
239
240 rdrv->start = host_start;
241 rdrv->stop = host_stop;
242 rdrv->irq = host_irq;
243 rdrv->name = "host";
244 ci->roles[CI_ROLE_HOST] = rdrv;
245
Peter Chen2f01a332015-07-21 09:51:29 +0800246 return 0;
247}
248
249void ci_hdrc_host_driver_init(void)
250{
Michael Grzeschikc8679a22014-10-13 09:53:04 +0800251 ehci_init_driver(&ci_ehci_hc_driver, &ehci_ci_overrides);
Peter Chen78f03572015-02-11 12:44:59 +0800252 orig_bus_suspend = ci_ehci_hc_driver.bus_suspend;
253 ci_ehci_hc_driver.bus_suspend = ci_ehci_bus_suspend;
Alexander Shishkineb70e5a2012-05-11 17:25:54 +0300254}