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;
36 static int (*orig_bus_suspend)(struct usb_hcd *hcd);
39 struct regulator *reg_vbus;
42 static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable)
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;
48 int port = HCS_N_PORTS(ehci->hcs_params);
53 "Not support multi-port regulator control\n");
57 ret = regulator_enable(priv->reg_vbus);
59 ret = regulator_disable(priv->reg_vbus);
62 "Failed to %s vbus regulator, ret=%d\n",
63 enable ? "enable" : "disable", ret);
70 static const struct ehci_driver_overrides ehci_ci_overrides = {
71 .extra_priv_size = sizeof(struct ehci_ci_priv),
72 .port_power = ehci_ci_portpower,
75 static irqreturn_t host_irq(struct ci_hdrc *ci)
77 return usb_hcd_irq(ci->irq, ci->hcd);
80 static int host_start(struct ci_hdrc *ci)
83 struct ehci_hcd *ehci;
84 struct ehci_ci_priv *priv;
90 hcd = usb_create_hcd(&ci_ehci_hc_driver, ci->dev, dev_name(ci->dev));
94 dev_set_drvdata(ci->dev, ci);
95 hcd->rsrc_start = ci->hw_bank.phys;
96 hcd->rsrc_len = ci->hw_bank.size;
97 hcd->regs = ci->hw_bank.abs;
100 hcd->power_budget = ci->platdata->power_budget;
101 hcd->tpl_support = ci->platdata->tpl_support;
105 hcd->usb_phy = ci->usb_phy;
107 ehci = hcd_to_ehci(hcd);
108 ehci->caps = ci->hw_bank.cap;
109 ehci->has_hostpc = ci->hw_bank.lpm;
110 ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
111 ehci->imx28_write_fix = ci->imx28_write_fix;
113 priv = (struct ehci_ci_priv *)ehci->priv;
114 priv->reg_vbus = NULL;
116 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
117 if (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON) {
118 ret = regulator_enable(ci->platdata->reg_vbus);
121 "Failed to enable vbus regulator, ret=%d\n",
126 priv->reg_vbus = ci->platdata->reg_vbus;
130 ret = usb_add_hcd(hcd, 0, 0);
134 struct usb_otg *otg = &ci->otg;
138 if (ci_otg_is_fsm_mode(ci)) {
139 otg->host = &hcd->self;
140 hcd->self.otg_port = 1;
144 if (ci->platdata->flags & CI_HDRC_DISABLE_STREAMING)
145 hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
147 if (ci->platdata->flags & CI_HDRC_FORCE_FULLSPEED)
148 hw_write(ci, OP_PORTSC, PORTSC_PFSC, PORTSC_PFSC);
153 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
154 (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
155 regulator_disable(ci->platdata->reg_vbus);
162 static void host_stop(struct ci_hdrc *ci)
164 struct usb_hcd *hcd = ci->hcd;
169 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
170 (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
171 regulator_disable(ci->platdata->reg_vbus);
176 void ci_hdrc_host_destroy(struct ci_hdrc *ci)
178 if (ci->role == CI_ROLE_HOST && ci->hcd)
182 static int ci_ehci_bus_suspend(struct usb_hcd *hcd)
184 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
188 int ret = orig_bus_suspend(hcd);
193 port = HCS_N_PORTS(ehci->hcs_params);
195 u32 __iomem *reg = &ehci->regs->port_status[port];
196 u32 portsc = ehci_readl(ehci, reg);
198 if (portsc & PORT_CONNECT) {
200 * For chipidea, the resume signal will be ended
201 * automatically, so for remote wakeup case, the
202 * usbcmd.rs may not be set before the resume has
203 * ended if other resume paths consumes too much
204 * time (~24ms), in that case, the SOF will not
205 * send out within 3ms after resume ends, then the
206 * high speed device will enter full speed mode.
209 tmp = ehci_readl(ehci, &ehci->regs->command);
211 ehci_writel(ehci, tmp, &ehci->regs->command);
213 * It needs a short delay between set RS bit and PHCD.
215 usleep_range(150, 200);
223 int ci_hdrc_host_init(struct ci_hdrc *ci)
225 struct ci_role_driver *rdrv;
227 if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
230 rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
234 rdrv->start = host_start;
235 rdrv->stop = host_stop;
236 rdrv->irq = host_irq;
238 ci->roles[CI_ROLE_HOST] = rdrv;
243 void ci_hdrc_host_driver_init(void)
245 ehci_init_driver(&ci_ehci_hc_driver, &ehci_ci_overrides);
246 orig_bus_suspend = ci_ehci_hc_driver.bus_suspend;
247 ci_ehci_hc_driver.bus_suspend = ci_ehci_bus_suspend;