/* * host.c - ChipIdea USB host controller driver * * Copyright (c) 2012 Intel Corporation * * Author: Alexander Shishkin * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include #include "../host/ehci.h" #include "ci.h" #include "bits.h" #include "host.h" static struct hc_driver __read_mostly ci_ehci_hc_driver; static int (*orig_bus_suspend)(struct usb_hcd *hcd); struct ehci_ci_priv { struct regulator *reg_vbus; }; static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); struct ehci_ci_priv *priv = (struct ehci_ci_priv *)ehci->priv; struct device *dev = hcd->self.controller; struct ci_hdrc *ci = dev_get_drvdata(dev); int ret = 0; int port = HCS_N_PORTS(ehci->hcs_params); if (priv->reg_vbus) { if (port > 1) { dev_warn(dev, "Not support multi-port regulator control\n"); return 0; } if (enable) ret = regulator_enable(priv->reg_vbus); else ret = regulator_disable(priv->reg_vbus); if (ret) { dev_err(dev, "Failed to %s vbus regulator, ret=%d\n", enable ? "enable" : "disable", ret); return ret; } } if (enable && (ci->platdata->phy_mode == USBPHY_INTERFACE_MODE_HSIC)) { /* * Marvell 28nm HSIC PHY requires forcing the port to HS mode. * As HSIC is always HS, this should be safe for others. */ hw_port_test_set(ci, 5); hw_port_test_set(ci, 0); } return 0; }; static int ehci_ci_reset(struct usb_hcd *hcd) { struct device *dev = hcd->self.controller; struct ci_hdrc *ci = dev_get_drvdata(dev); struct ehci_hcd *ehci = hcd_to_ehci(hcd); int ret; ret = ehci_setup(hcd); if (ret) return ret; ehci->need_io_watchdog = 0; ci_platform_configure(ci); return ret; } static const struct ehci_driver_overrides ehci_ci_overrides = { .extra_priv_size = sizeof(struct ehci_ci_priv), .port_power = ehci_ci_portpower, .reset = ehci_ci_reset, }; static irqreturn_t host_irq(struct ci_hdrc *ci) { return usb_hcd_irq(ci->irq, ci->hcd); } static int host_start(struct ci_hdrc *ci) { struct usb_hcd *hcd; struct ehci_hcd *ehci; struct ehci_ci_priv *priv; int ret; if (usb_disabled()) return -ENODEV; hcd = usb_create_hcd(&ci_ehci_hc_driver, ci->dev, dev_name(ci->dev)); if (!hcd) return -ENOMEM; dev_set_drvdata(ci->dev, ci); hcd->rsrc_start = ci->hw_bank.phys; hcd->rsrc_len = ci->hw_bank.size; hcd->regs = ci->hw_bank.abs; hcd->has_tt = 1; hcd->power_budget = ci->platdata->power_budget; hcd->tpl_support = ci->platdata->tpl_support; if (ci->phy) hcd->phy = ci->phy; else hcd->usb_phy = ci->usb_phy; ehci = hcd_to_ehci(hcd); ehci->caps = ci->hw_bank.cap; ehci->has_hostpc = ci->hw_bank.lpm; ehci->has_tdi_phy_lpm = ci->hw_bank.lpm; ehci->imx28_write_fix = ci->imx28_write_fix; priv = (struct ehci_ci_priv *)ehci->priv; priv->reg_vbus = NULL; if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) { if (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON) { ret = regulator_enable(ci->platdata->reg_vbus); if (ret) { dev_err(ci->dev, "Failed to enable vbus regulator, ret=%d\n", ret); goto put_hcd; } } else { priv->reg_vbus = ci->platdata->reg_vbus; } } ret = usb_add_hcd(hcd, 0, 0); if (ret) { goto disable_reg; } else { struct usb_otg *otg = &ci->otg; ci->hcd = hcd; if (ci_otg_is_fsm_mode(ci)) { otg->host = &hcd->self; hcd->self.otg_port = 1; } } return ret; disable_reg: if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) && (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON)) regulator_disable(ci->platdata->reg_vbus); put_hcd: usb_put_hcd(hcd); return ret; } static void host_stop(struct ci_hdrc *ci) { struct usb_hcd *hcd = ci->hcd; if (hcd) { usb_remove_hcd(hcd); ci->role = CI_ROLE_END; synchronize_irq(ci->irq); usb_put_hcd(hcd); if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) && (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON)) regulator_disable(ci->platdata->reg_vbus); } ci->hcd = NULL; ci->otg.host = NULL; } void ci_hdrc_host_destroy(struct ci_hdrc *ci) { if (ci->role == CI_ROLE_HOST && ci->hcd) host_stop(ci); } static int ci_ehci_bus_suspend(struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); int port; u32 tmp; int ret = orig_bus_suspend(hcd); if (ret) return ret; port = HCS_N_PORTS(ehci->hcs_params); while (port--) { u32 __iomem *reg = &ehci->regs->port_status[port]; u32 portsc = ehci_readl(ehci, reg); if (portsc & PORT_CONNECT) { /* * For chipidea, the resume signal will be ended * automatically, so for remote wakeup case, the * usbcmd.rs may not be set before the resume has * ended if other resume paths consumes too much * time (~24ms), in that case, the SOF will not * send out within 3ms after resume ends, then the * high speed device will enter full speed mode. */ tmp = ehci_readl(ehci, &ehci->regs->command); tmp |= CMD_RUN; ehci_writel(ehci, tmp, &ehci->regs->command); /* * It needs a short delay between set RS bit and PHCD. */ usleep_range(150, 200); break; } } return 0; } int ci_hdrc_host_init(struct ci_hdrc *ci) { struct ci_role_driver *rdrv; if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC)) return -ENXIO; rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL); if (!rdrv) return -ENOMEM; rdrv->start = host_start; rdrv->stop = host_stop; rdrv->irq = host_irq; rdrv->name = "host"; ci->roles[CI_ROLE_HOST] = rdrv; return 0; } void ci_hdrc_host_driver_init(void) { ehci_init_driver(&ci_ehci_hc_driver, &ehci_ci_overrides); orig_bus_suspend = ci_ehci_hc_driver.bus_suspend; ci_ehci_hc_driver.bus_suspend = ci_ehci_bus_suspend; } re reversed. A warning should be displayed if an error is returned, not on success. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/usb/class')