Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
[deliverable/linux.git] / drivers / usb / chipidea / host.c
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>
23 #include <linux/io.h>
24 #include <linux/usb.h>
25 #include <linux/usb/hcd.h>
26 #include <linux/usb/chipidea.h>
27 #include <linux/regulator/consumer.h>
28
29 #include "../host/ehci.h"
30
31 #include "ci.h"
32 #include "bits.h"
33 #include "host.h"
34
35 static struct hc_driver __read_mostly ci_ehci_hc_driver;
36 static int (*orig_bus_suspend)(struct usb_hcd *hcd);
37
38 struct ehci_ci_priv {
39 struct regulator *reg_vbus;
40 struct ci_hdrc *ci;
41 };
42
43 static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable)
44 {
45 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
46 struct ehci_ci_priv *priv = (struct ehci_ci_priv *)ehci->priv;
47 struct ci_hdrc *ci = priv->ci;
48 struct device *dev = hcd->self.controller;
49 int ret = 0;
50 int port = HCS_N_PORTS(ehci->hcs_params);
51
52 if (priv->reg_vbus) {
53 if (port > 1) {
54 dev_warn(dev,
55 "Not support multi-port regulator control\n");
56 return 0;
57 }
58 if (enable)
59 ret = regulator_enable(priv->reg_vbus);
60 else
61 ret = regulator_disable(priv->reg_vbus);
62 if (ret) {
63 dev_err(dev,
64 "Failed to %s vbus regulator, ret=%d\n",
65 enable ? "enable" : "disable", ret);
66 return ret;
67 }
68 }
69
70 if (enable && (ci->platdata->phy_mode == USBPHY_INTERFACE_MODE_HSIC)) {
71 /*
72 * Marvell 28nm HSIC PHY requires forcing the port to HS mode.
73 * As HSIC is always HS, this should be safe for others.
74 */
75 hw_port_test_set(ci, 5);
76 hw_port_test_set(ci, 0);
77 }
78 return 0;
79 };
80
81 static const struct ehci_driver_overrides ehci_ci_overrides = {
82 .extra_priv_size = sizeof(struct ehci_ci_priv),
83 .port_power = ehci_ci_portpower,
84 };
85
86 static irqreturn_t host_irq(struct ci_hdrc *ci)
87 {
88 return usb_hcd_irq(ci->irq, ci->hcd);
89 }
90
91 static int host_start(struct ci_hdrc *ci)
92 {
93 struct usb_hcd *hcd;
94 struct ehci_hcd *ehci;
95 struct ehci_ci_priv *priv;
96 int ret;
97
98 if (usb_disabled())
99 return -ENODEV;
100
101 hcd = usb_create_hcd(&ci_ehci_hc_driver, ci->dev, dev_name(ci->dev));
102 if (!hcd)
103 return -ENOMEM;
104
105 dev_set_drvdata(ci->dev, ci);
106 hcd->rsrc_start = ci->hw_bank.phys;
107 hcd->rsrc_len = ci->hw_bank.size;
108 hcd->regs = ci->hw_bank.abs;
109 hcd->has_tt = 1;
110
111 hcd->power_budget = ci->platdata->power_budget;
112 hcd->tpl_support = ci->platdata->tpl_support;
113 if (ci->phy)
114 hcd->phy = ci->phy;
115 else
116 hcd->usb_phy = ci->usb_phy;
117
118 ehci = hcd_to_ehci(hcd);
119 ehci->caps = ci->hw_bank.cap;
120 ehci->has_hostpc = ci->hw_bank.lpm;
121 ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
122 ehci->imx28_write_fix = ci->imx28_write_fix;
123
124 priv = (struct ehci_ci_priv *)ehci->priv;
125 priv->reg_vbus = NULL;
126 priv->ci = ci;
127
128 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
129 if (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON) {
130 ret = regulator_enable(ci->platdata->reg_vbus);
131 if (ret) {
132 dev_err(ci->dev,
133 "Failed to enable vbus regulator, ret=%d\n",
134 ret);
135 goto put_hcd;
136 }
137 } else {
138 priv->reg_vbus = ci->platdata->reg_vbus;
139 }
140 }
141
142 ret = usb_add_hcd(hcd, 0, 0);
143 if (ret) {
144 goto disable_reg;
145 } else {
146 struct usb_otg *otg = &ci->otg;
147
148 ci->hcd = hcd;
149
150 if (ci_otg_is_fsm_mode(ci)) {
151 otg->host = &hcd->self;
152 hcd->self.otg_port = 1;
153 }
154 }
155
156 if (ci->platdata->flags & CI_HDRC_DISABLE_STREAMING)
157 hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
158
159 if (ci->platdata->flags & CI_HDRC_FORCE_FULLSPEED)
160 hw_write(ci, OP_PORTSC, PORTSC_PFSC, PORTSC_PFSC);
161
162 return ret;
163
164 disable_reg:
165 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
166 (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
167 regulator_disable(ci->platdata->reg_vbus);
168 put_hcd:
169 usb_put_hcd(hcd);
170
171 return ret;
172 }
173
174 static void host_stop(struct ci_hdrc *ci)
175 {
176 struct usb_hcd *hcd = ci->hcd;
177
178 if (hcd) {
179 usb_remove_hcd(hcd);
180 usb_put_hcd(hcd);
181 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
182 (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
183 regulator_disable(ci->platdata->reg_vbus);
184 }
185 }
186
187
188 void ci_hdrc_host_destroy(struct ci_hdrc *ci)
189 {
190 if (ci->role == CI_ROLE_HOST && ci->hcd)
191 host_stop(ci);
192 }
193
194 static int ci_ehci_bus_suspend(struct usb_hcd *hcd)
195 {
196 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
197 int port;
198 u32 tmp;
199
200 int ret = orig_bus_suspend(hcd);
201
202 if (ret)
203 return ret;
204
205 port = HCS_N_PORTS(ehci->hcs_params);
206 while (port--) {
207 u32 __iomem *reg = &ehci->regs->port_status[port];
208 u32 portsc = ehci_readl(ehci, reg);
209
210 if (portsc & PORT_CONNECT) {
211 /*
212 * For chipidea, the resume signal will be ended
213 * automatically, so for remote wakeup case, the
214 * usbcmd.rs may not be set before the resume has
215 * ended if other resume paths consumes too much
216 * time (~24ms), in that case, the SOF will not
217 * send out within 3ms after resume ends, then the
218 * high speed device will enter full speed mode.
219 */
220
221 tmp = ehci_readl(ehci, &ehci->regs->command);
222 tmp |= CMD_RUN;
223 ehci_writel(ehci, tmp, &ehci->regs->command);
224 /*
225 * It needs a short delay between set RS bit and PHCD.
226 */
227 usleep_range(150, 200);
228 break;
229 }
230 }
231
232 return 0;
233 }
234
235 int ci_hdrc_host_init(struct ci_hdrc *ci)
236 {
237 struct ci_role_driver *rdrv;
238
239 if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
240 return -ENXIO;
241
242 rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
243 if (!rdrv)
244 return -ENOMEM;
245
246 rdrv->start = host_start;
247 rdrv->stop = host_stop;
248 rdrv->irq = host_irq;
249 rdrv->name = "host";
250 ci->roles[CI_ROLE_HOST] = rdrv;
251
252 return 0;
253 }
254
255 void ci_hdrc_host_driver_init(void)
256 {
257 ehci_init_driver(&ci_ehci_hc_driver, &ehci_ci_overrides);
258 orig_bus_suspend = ci_ehci_hc_driver.bus_suspend;
259 ci_ehci_hc_driver.bus_suspend = ci_ehci_bus_suspend;
260 }
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