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https://github.com/torvalds/linux
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f6a9ff0783
For OTG and Embedded hosts, they may need TPL (Targeted Peripheral List) for usb certification and other vender specific requirements, the platform can tell chipidea core driver if it supports tpl through DT or platform data. Signed-off-by: Peter Chen <peter.chen@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
153 lines
3.4 KiB
C
153 lines
3.4 KiB
C
/*
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* host.c - ChipIdea USB host controller driver
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*
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* Copyright (c) 2012 Intel Corporation
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*
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* Author: Alexander Shishkin
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/kernel.h>
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#include <linux/io.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include <linux/usb/chipidea.h>
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#include <linux/regulator/consumer.h>
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#include "../host/ehci.h"
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#include "ci.h"
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#include "bits.h"
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#include "host.h"
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static struct hc_driver __read_mostly ci_ehci_hc_driver;
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static irqreturn_t host_irq(struct ci_hdrc *ci)
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{
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return usb_hcd_irq(ci->irq, ci->hcd);
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}
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static int host_start(struct ci_hdrc *ci)
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{
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struct usb_hcd *hcd;
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struct ehci_hcd *ehci;
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int ret;
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if (usb_disabled())
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return -ENODEV;
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hcd = usb_create_hcd(&ci_ehci_hc_driver, ci->dev, dev_name(ci->dev));
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if (!hcd)
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return -ENOMEM;
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dev_set_drvdata(ci->dev, ci);
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hcd->rsrc_start = ci->hw_bank.phys;
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hcd->rsrc_len = ci->hw_bank.size;
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hcd->regs = ci->hw_bank.abs;
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hcd->has_tt = 1;
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hcd->power_budget = ci->platdata->power_budget;
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hcd->phy = ci->transceiver;
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hcd->tpl_support = ci->platdata->tpl_support;
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ehci = hcd_to_ehci(hcd);
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ehci->caps = ci->hw_bank.cap;
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ehci->has_hostpc = ci->hw_bank.lpm;
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ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
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ehci->imx28_write_fix = ci->imx28_write_fix;
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/*
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* vbus is always on if host is not in OTG FSM mode,
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* otherwise should be controlled by OTG FSM
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*/
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if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
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ret = regulator_enable(ci->platdata->reg_vbus);
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if (ret) {
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dev_err(ci->dev,
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"Failed to enable vbus regulator, ret=%d\n",
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ret);
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goto put_hcd;
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}
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}
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ret = usb_add_hcd(hcd, 0, 0);
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if (ret) {
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goto disable_reg;
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} else {
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struct usb_otg *otg = ci->transceiver->otg;
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ci->hcd = hcd;
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if (otg) {
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otg->host = &hcd->self;
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hcd->self.otg_port = 1;
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}
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}
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if (ci->platdata->flags & CI_HDRC_DISABLE_STREAMING)
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hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
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return ret;
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disable_reg:
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if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci))
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regulator_disable(ci->platdata->reg_vbus);
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put_hcd:
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usb_put_hcd(hcd);
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return ret;
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}
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static void host_stop(struct ci_hdrc *ci)
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{
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struct usb_hcd *hcd = ci->hcd;
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if (hcd) {
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usb_remove_hcd(hcd);
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usb_put_hcd(hcd);
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if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci))
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regulator_disable(ci->platdata->reg_vbus);
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}
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}
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void ci_hdrc_host_destroy(struct ci_hdrc *ci)
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{
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if (ci->role == CI_ROLE_HOST && ci->hcd)
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host_stop(ci);
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}
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int ci_hdrc_host_init(struct ci_hdrc *ci)
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{
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struct ci_role_driver *rdrv;
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if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
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return -ENXIO;
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rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
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if (!rdrv)
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return -ENOMEM;
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rdrv->start = host_start;
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rdrv->stop = host_stop;
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rdrv->irq = host_irq;
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rdrv->name = "host";
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ci->roles[CI_ROLE_HOST] = rdrv;
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ehci_init_driver(&ci_ehci_hc_driver, NULL);
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return 0;
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}
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