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;
43 static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable)
45 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
46 struct ehci_ci_priv *priv = (struct ehci_ci_priv *)ehci->priv;
47 struct device *dev = hcd->self.controller;
48 struct ci_hdrc *ci = dev_get_drvdata(dev);
50 int port = HCS_N_PORTS(ehci->hcs_params);
52 if (priv->reg_vbus && enable != priv->enabled) {
55 "Not support multi-port regulator control\n");
59 ret = regulator_enable(priv->reg_vbus);
61 ret = regulator_disable(priv->reg_vbus);
64 "Failed to %s vbus regulator, ret=%d\n",
65 enable ? "enable" : "disable", ret);
68 priv->enabled = enable;
71 if (enable && (ci->platdata->phy_mode == USBPHY_INTERFACE_MODE_HSIC)) {
73 * Marvell 28nm HSIC PHY requires forcing the port to HS mode.
74 * As HSIC is always HS, this should be safe for others.
76 hw_port_test_set(ci, 5);
77 hw_port_test_set(ci, 0);
82 static int ehci_ci_reset(struct usb_hcd *hcd)
84 struct device *dev = hcd->self.controller;
85 struct ci_hdrc *ci = dev_get_drvdata(dev);
86 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
89 ret = ehci_setup(hcd);
93 ehci->need_io_watchdog = 0;
95 ci_platform_configure(ci);
100 static const struct ehci_driver_overrides ehci_ci_overrides = {
101 .extra_priv_size = sizeof(struct ehci_ci_priv),
102 .port_power = ehci_ci_portpower,
103 .reset = ehci_ci_reset,
106 static irqreturn_t host_irq(struct ci_hdrc *ci)
108 return usb_hcd_irq(ci->irq, ci->hcd);
111 static int host_start(struct ci_hdrc *ci)
114 struct ehci_hcd *ehci;
115 struct ehci_ci_priv *priv;
121 hcd = usb_create_hcd(&ci_ehci_hc_driver, ci->dev, dev_name(ci->dev));
125 dev_set_drvdata(ci->dev, ci);
126 hcd->rsrc_start = ci->hw_bank.phys;
127 hcd->rsrc_len = ci->hw_bank.size;
128 hcd->regs = ci->hw_bank.abs;
131 hcd->power_budget = ci->platdata->power_budget;
132 hcd->tpl_support = ci->platdata->tpl_support;
136 hcd->usb_phy = ci->usb_phy;
138 ehci = hcd_to_ehci(hcd);
139 ehci->caps = ci->hw_bank.cap;
140 ehci->has_hostpc = ci->hw_bank.lpm;
141 ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
142 ehci->imx28_write_fix = ci->imx28_write_fix;
144 priv = (struct ehci_ci_priv *)ehci->priv;
145 priv->reg_vbus = NULL;
147 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
148 if (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON) {
149 ret = regulator_enable(ci->platdata->reg_vbus);
152 "Failed to enable vbus regulator, ret=%d\n",
157 priv->reg_vbus = ci->platdata->reg_vbus;
161 ret = usb_add_hcd(hcd, 0, 0);
165 struct usb_otg *otg = &ci->otg;
169 if (ci_otg_is_fsm_mode(ci)) {
170 otg->host = &hcd->self;
171 hcd->self.otg_port = 1;
178 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
179 (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
180 regulator_disable(ci->platdata->reg_vbus);
187 static void host_stop(struct ci_hdrc *ci)
189 struct usb_hcd *hcd = ci->hcd;
193 ci->role = CI_ROLE_END;
194 synchronize_irq(ci->irq);
196 if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
197 (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
198 regulator_disable(ci->platdata->reg_vbus);
205 void ci_hdrc_host_destroy(struct ci_hdrc *ci)
207 if (ci->role == CI_ROLE_HOST && ci->hcd)
211 static int ci_ehci_bus_suspend(struct usb_hcd *hcd)
213 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
217 int ret = orig_bus_suspend(hcd);
222 port = HCS_N_PORTS(ehci->hcs_params);
224 u32 __iomem *reg = &ehci->regs->port_status[port];
225 u32 portsc = ehci_readl(ehci, reg);
227 if (portsc & PORT_CONNECT) {
229 * For chipidea, the resume signal will be ended
230 * automatically, so for remote wakeup case, the
231 * usbcmd.rs may not be set before the resume has
232 * ended if other resume paths consumes too much
233 * time (~24ms), in that case, the SOF will not
234 * send out within 3ms after resume ends, then the
235 * high speed device will enter full speed mode.
238 tmp = ehci_readl(ehci, &ehci->regs->command);
240 ehci_writel(ehci, tmp, &ehci->regs->command);
242 * It needs a short delay between set RS bit and PHCD.
244 usleep_range(150, 200);
252 int ci_hdrc_host_init(struct ci_hdrc *ci)
254 struct ci_role_driver *rdrv;
256 if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
259 rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
263 rdrv->start = host_start;
264 rdrv->stop = host_stop;
265 rdrv->irq = host_irq;
267 ci->roles[CI_ROLE_HOST] = rdrv;
272 void ci_hdrc_host_driver_init(void)
274 ehci_init_driver(&ci_ehci_hc_driver, &ehci_ci_overrides);
275 orig_bus_suspend = ci_ehci_hc_driver.bus_suspend;
276 ci_ehci_hc_driver.bus_suspend = ci_ehci_bus_suspend;