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Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards

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orangepi/linux-orangepi-5.10.y.git/trunk/drivers/usb/chipidea/core.c
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// SPDX-License-Identifier: GPL-2.0
/*
 * core.c - ChipIdea USB IP core family device controller
 *
 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
 * Copyright (C) 2020 NXP
 *
 * Author: David Lopo
 *	   Peter Chen <peter.chen@nxp.com>
 *
 * Main Features:
 * - Four transfers are supported, usbtest is passed
 * - USB Certification for gadget: CH9 and Mass Storage are passed
 * - Low power mode
 * - USB wakeup
 */
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/extcon.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/idr.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
#include <linux/pinctrl/consumer.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
#include <linux/usb/chipidea.h>
#include <linux/usb/of.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <linux/usb/ehci_def.h>
 
#include "ci.h"
#include "udc.h"
#include "bits.h"
#include "host.h"
#include "otg.h"
#include "otg_fsm.h"
 
/* Controller register map */
static const u8 ci_regs_nolpm[] = {
<------>[CAP_CAPLENGTH]		= 0x00U,
<------>[CAP_HCCPARAMS]		= 0x08U,
<------>[CAP_DCCPARAMS]		= 0x24U,
<------>[CAP_TESTMODE]		= 0x38U,
<------>[OP_USBCMD]		= 0x00U,
<------>[OP_USBSTS]		= 0x04U,
<------>[OP_USBINTR]		= 0x08U,
<------>[OP_DEVICEADDR]		= 0x14U,
<------>[OP_ENDPTLISTADDR]	= 0x18U,
<------>[OP_TTCTRL]		= 0x1CU,
<------>[OP_BURSTSIZE]		= 0x20U,
<------>[OP_ULPI_VIEWPORT]	= 0x30U,
<------>[OP_PORTSC]		= 0x44U,
<------>[OP_DEVLC]		= 0x84U,
<------>[OP_OTGSC]		= 0x64U,
<------>[OP_USBMODE]		= 0x68U,
<------>[OP_ENDPTSETUPSTAT]	= 0x6CU,
<------>[OP_ENDPTPRIME]		= 0x70U,
<------>[OP_ENDPTFLUSH]		= 0x74U,
<------>[OP_ENDPTSTAT]		= 0x78U,
<------>[OP_ENDPTCOMPLETE]	= 0x7CU,
<------>[OP_ENDPTCTRL]		= 0x80U,
};
 
static const u8 ci_regs_lpm[] = {
<------>[CAP_CAPLENGTH]		= 0x00U,
<------>[CAP_HCCPARAMS]		= 0x08U,
<------>[CAP_DCCPARAMS]		= 0x24U,
<------>[CAP_TESTMODE]		= 0xFCU,
<------>[OP_USBCMD]		= 0x00U,
<------>[OP_USBSTS]		= 0x04U,
<------>[OP_USBINTR]		= 0x08U,
<------>[OP_DEVICEADDR]		= 0x14U,
<------>[OP_ENDPTLISTADDR]	= 0x18U,
<------>[OP_TTCTRL]		= 0x1CU,
<------>[OP_BURSTSIZE]		= 0x20U,
<------>[OP_ULPI_VIEWPORT]	= 0x30U,
<------>[OP_PORTSC]		= 0x44U,
<------>[OP_DEVLC]		= 0x84U,
<------>[OP_OTGSC]		= 0xC4U,
<------>[OP_USBMODE]		= 0xC8U,
<------>[OP_ENDPTSETUPSTAT]	= 0xD8U,
<------>[OP_ENDPTPRIME]		= 0xDCU,
<------>[OP_ENDPTFLUSH]		= 0xE0U,
<------>[OP_ENDPTSTAT]		= 0xE4U,
<------>[OP_ENDPTCOMPLETE]	= 0xE8U,
<------>[OP_ENDPTCTRL]		= 0xECU,
};
 
static void hw_alloc_regmap(struct ci_hdrc *ci, bool is_lpm)
{
<------>int i;
 
<------>for (i = 0; i < OP_ENDPTCTRL; i++)
<------><------>ci->hw_bank.regmap[i] =
<------><------><------>(i <= CAP_LAST ? ci->hw_bank.cap : ci->hw_bank.op) +
<------><------><------>(is_lpm ? ci_regs_lpm[i] : ci_regs_nolpm[i]);
 
<------>for (; i <= OP_LAST; i++)
<------><------>ci->hw_bank.regmap[i] = ci->hw_bank.op +
<------><------><------>4 * (i - OP_ENDPTCTRL) +
<------><------><------>(is_lpm
<------><------><------> ? ci_regs_lpm[OP_ENDPTCTRL]
<------><------><------> : ci_regs_nolpm[OP_ENDPTCTRL]);
 
}
 
static enum ci_revision ci_get_revision(struct ci_hdrc *ci)
{
<------>int ver = hw_read_id_reg(ci, ID_ID, VERSION) >> __ffs(VERSION);
<------>enum ci_revision rev = CI_REVISION_UNKNOWN;
 
<------>if (ver == 0x2) {
<------><------>rev = hw_read_id_reg(ci, ID_ID, REVISION)
<------><------><------>>> __ffs(REVISION);
<------><------>rev += CI_REVISION_20;
<------>} else if (ver == 0x0) {
<------><------>rev = CI_REVISION_1X;
<------>}
 
<------>return rev;
}
 
/**
 * hw_read_intr_enable: returns interrupt enable register
 *
 * @ci: the controller
 *
 * This function returns register data
 */
u32 hw_read_intr_enable(struct ci_hdrc *ci)
{
<------>return hw_read(ci, OP_USBINTR, ~0);
}
 
/**
 * hw_read_intr_status: returns interrupt status register
 *
 * @ci: the controller
 *
 * This function returns register data
 */
u32 hw_read_intr_status(struct ci_hdrc *ci)
{
<------>return hw_read(ci, OP_USBSTS, ~0);
}
 
/**
 * hw_port_test_set: writes port test mode (execute without interruption)
 * @ci: the controller
 * @mode: new value
 *
 * This function returns an error code
 */
int hw_port_test_set(struct ci_hdrc *ci, u8 mode)
{
<------>const u8 TEST_MODE_MAX = 7;
 
<------>if (mode > TEST_MODE_MAX)
<------><------>return -EINVAL;
 
<------>hw_write(ci, OP_PORTSC, PORTSC_PTC, mode << __ffs(PORTSC_PTC));
<------>return 0;
}
 
/**
 * hw_port_test_get: reads port test mode value
 *
 * @ci: the controller
 *
 * This function returns port test mode value
 */
u8 hw_port_test_get(struct ci_hdrc *ci)
{
<------>return hw_read(ci, OP_PORTSC, PORTSC_PTC) >> __ffs(PORTSC_PTC);
}
 
static void hw_wait_phy_stable(void)
{
<------>/*
<------> * The phy needs some delay to output the stable status from low
<------> * power mode. And for OTGSC, the status inputs are debounced
<------> * using a 1 ms time constant, so, delay 2ms for controller to get
<------> * the stable status, like vbus and id when the phy leaves low power.
<------> */
<------>usleep_range(2000, 2500);
}
 
/* The PHY enters/leaves low power mode */
static void ci_hdrc_enter_lpm(struct ci_hdrc *ci, bool enable)
{
<------>enum ci_hw_regs reg = ci->hw_bank.lpm ? OP_DEVLC : OP_PORTSC;
<------>bool lpm = !!(hw_read(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm)));
 
<------>if (enable && !lpm)
<------><------>hw_write(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm),
<------><------><------><------>PORTSC_PHCD(ci->hw_bank.lpm));
<------>else if (!enable && lpm)
<------><------>hw_write(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm),
<------><------><------><------>0);
}
 
static int hw_device_init(struct ci_hdrc *ci, void __iomem *base)
{
<------>u32 reg;
 
<------>/* bank is a module variable */
<------>ci->hw_bank.abs = base;
 
<------>ci->hw_bank.cap = ci->hw_bank.abs;
<------>ci->hw_bank.cap += ci->platdata->capoffset;
<------>ci->hw_bank.op = ci->hw_bank.cap + (ioread32(ci->hw_bank.cap) & 0xff);
 
<------>hw_alloc_regmap(ci, false);
<------>reg = hw_read(ci, CAP_HCCPARAMS, HCCPARAMS_LEN) >>
<------><------>__ffs(HCCPARAMS_LEN);
<------>ci->hw_bank.lpm  = reg;
<------>if (reg)
<------><------>hw_alloc_regmap(ci, !!reg);
<------>ci->hw_bank.size = ci->hw_bank.op - ci->hw_bank.abs;
<------>ci->hw_bank.size += OP_LAST;
<------>ci->hw_bank.size /= sizeof(u32);
 
<------>reg = hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_DEN) >>
<------><------>__ffs(DCCPARAMS_DEN);
<------>ci->hw_ep_max = reg * 2;   /* cache hw ENDPT_MAX */
 
<------>if (ci->hw_ep_max > ENDPT_MAX)
<------><------>return -ENODEV;
 
<------>ci_hdrc_enter_lpm(ci, false);
 
<------>/* Disable all interrupts bits */
<------>hw_write(ci, OP_USBINTR, 0xffffffff, 0);
 
<------>/* Clear all interrupts status bits*/
<------>hw_write(ci, OP_USBSTS, 0xffffffff, 0xffffffff);
 
<------>ci->rev = ci_get_revision(ci);
 
<------>dev_dbg(ci->dev,
<------><------>"revision: %d, lpm: %d; cap: %px op: %px\n",
<------><------>ci->rev, ci->hw_bank.lpm, ci->hw_bank.cap, ci->hw_bank.op);
 
<------>/* setup lock mode ? */
 
<------>/* ENDPTSETUPSTAT is '0' by default */
 
<------>/* HCSPARAMS.bf.ppc SHOULD BE zero for device */
 
<------>return 0;
}
 
void hw_phymode_configure(struct ci_hdrc *ci)
{
<------>u32 portsc, lpm, sts = 0;
 
<------>switch (ci->platdata->phy_mode) {
<------>case USBPHY_INTERFACE_MODE_UTMI:
<------><------>portsc = PORTSC_PTS(PTS_UTMI);
<------><------>lpm = DEVLC_PTS(PTS_UTMI);
<------><------>break;
<------>case USBPHY_INTERFACE_MODE_UTMIW:
<------><------>portsc = PORTSC_PTS(PTS_UTMI) | PORTSC_PTW;
<------><------>lpm = DEVLC_PTS(PTS_UTMI) | DEVLC_PTW;
<------><------>break;
<------>case USBPHY_INTERFACE_MODE_ULPI:
<------><------>portsc = PORTSC_PTS(PTS_ULPI);
<------><------>lpm = DEVLC_PTS(PTS_ULPI);
<------><------>break;
<------>case USBPHY_INTERFACE_MODE_SERIAL:
<------><------>portsc = PORTSC_PTS(PTS_SERIAL);
<------><------>lpm = DEVLC_PTS(PTS_SERIAL);
<------><------>sts = 1;
<------><------>break;
<------>case USBPHY_INTERFACE_MODE_HSIC:
<------><------>portsc = PORTSC_PTS(PTS_HSIC);
<------><------>lpm = DEVLC_PTS(PTS_HSIC);
<------><------>break;
<------>default:
<------><------>return;
<------>}
 
<------>if (ci->hw_bank.lpm) {
<------><------>hw_write(ci, OP_DEVLC, DEVLC_PTS(7) | DEVLC_PTW, lpm);
<------><------>if (sts)
<------><------><------>hw_write(ci, OP_DEVLC, DEVLC_STS, DEVLC_STS);
<------>} else {
<------><------>hw_write(ci, OP_PORTSC, PORTSC_PTS(7) | PORTSC_PTW, portsc);
<------><------>if (sts)
<------><------><------>hw_write(ci, OP_PORTSC, PORTSC_STS, PORTSC_STS);
<------>}
}
EXPORT_SYMBOL_GPL(hw_phymode_configure);
 
/**
 * _ci_usb_phy_init: initialize phy taking in account both phy and usb_phy
 * interfaces
 * @ci: the controller
 *
 * This function returns an error code if the phy failed to init
 */
static int _ci_usb_phy_init(struct ci_hdrc *ci)
{
<------>int ret;
 
<------>if (ci->phy) {
<------><------>ret = phy_init(ci->phy);
<------><------>if (ret)
<------><------><------>return ret;
 
<------><------>ret = phy_power_on(ci->phy);
<------><------>if (ret) {
<------><------><------>phy_exit(ci->phy);
<------><------><------>return ret;
<------><------>}
<------>} else {
<------><------>ret = usb_phy_init(ci->usb_phy);
<------>}
 
<------>return ret;
}
 
/**
 * _ci_usb_phy_exit: deinitialize phy taking in account both phy and usb_phy
 * interfaces
 * @ci: the controller
 */
static void ci_usb_phy_exit(struct ci_hdrc *ci)
{
<------>if (ci->platdata->flags & CI_HDRC_OVERRIDE_PHY_CONTROL)
<------><------>return;
 
<------>if (ci->phy) {
<------><------>phy_power_off(ci->phy);
<------><------>phy_exit(ci->phy);
<------>} else {
<------><------>usb_phy_shutdown(ci->usb_phy);
<------>}
}
 
/**
 * ci_usb_phy_init: initialize phy according to different phy type
 * @ci: the controller
 *
 * This function returns an error code if usb_phy_init has failed
 */
static int ci_usb_phy_init(struct ci_hdrc *ci)
{
<------>int ret;
 
<------>if (ci->platdata->flags & CI_HDRC_OVERRIDE_PHY_CONTROL)
<------><------>return 0;
 
<------>switch (ci->platdata->phy_mode) {
<------>case USBPHY_INTERFACE_MODE_UTMI:
<------>case USBPHY_INTERFACE_MODE_UTMIW:
<------>case USBPHY_INTERFACE_MODE_HSIC:
<------><------>ret = _ci_usb_phy_init(ci);
<------><------>if (!ret)
<------><------><------>hw_wait_phy_stable();
<------><------>else
<------><------><------>return ret;
<------><------>hw_phymode_configure(ci);
<------><------>break;
<------>case USBPHY_INTERFACE_MODE_ULPI:
<------>case USBPHY_INTERFACE_MODE_SERIAL:
<------><------>hw_phymode_configure(ci);
<------><------>ret = _ci_usb_phy_init(ci);
<------><------>if (ret)
<------><------><------>return ret;
<------><------>break;
<------>default:
<------><------>ret = _ci_usb_phy_init(ci);
<------><------>if (!ret)
<------><------><------>hw_wait_phy_stable();
<------>}
 
<------>return ret;
}
 
 
/**
 * ci_platform_configure: do controller configure
 * @ci: the controller
 *
 */
void ci_platform_configure(struct ci_hdrc *ci)
{
<------>bool is_device_mode, is_host_mode;
 
<------>is_device_mode = hw_read(ci, OP_USBMODE, USBMODE_CM) == USBMODE_CM_DC;
<------>is_host_mode = hw_read(ci, OP_USBMODE, USBMODE_CM) == USBMODE_CM_HC;
 
<------>if (is_device_mode) {
<------><------>phy_set_mode(ci->phy, PHY_MODE_USB_DEVICE);
 
<------><------>if (ci->platdata->flags & CI_HDRC_DISABLE_DEVICE_STREAMING)
<------><------><------>hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS,
<------><------><------><------> USBMODE_CI_SDIS);
<------>}
 
<------>if (is_host_mode) {
<------><------>phy_set_mode(ci->phy, PHY_MODE_USB_HOST);
 
<------><------>if (ci->platdata->flags & CI_HDRC_DISABLE_HOST_STREAMING)
<------><------><------>hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS,
<------><------><------><------> USBMODE_CI_SDIS);
<------>}
 
<------>if (ci->platdata->flags & CI_HDRC_FORCE_FULLSPEED) {
<------><------>if (ci->hw_bank.lpm)
<------><------><------>hw_write(ci, OP_DEVLC, DEVLC_PFSC, DEVLC_PFSC);
<------><------>else
<------><------><------>hw_write(ci, OP_PORTSC, PORTSC_PFSC, PORTSC_PFSC);
<------>}
 
<------>if (ci->platdata->flags & CI_HDRC_SET_NON_ZERO_TTHA)
<------><------>hw_write(ci, OP_TTCTRL, TTCTRL_TTHA_MASK, TTCTRL_TTHA);
 
<------>hw_write(ci, OP_USBCMD, 0xff0000, ci->platdata->itc_setting << 16);
 
<------>if (ci->platdata->flags & CI_HDRC_OVERRIDE_AHB_BURST)
<------><------>hw_write_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK,
<------><------><------>ci->platdata->ahb_burst_config);
 
<------>/* override burst size, take effect only when ahb_burst_config is 0 */
<------>if (!hw_read_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK)) {
<------><------>if (ci->platdata->flags & CI_HDRC_OVERRIDE_TX_BURST)
<------><------><------>hw_write(ci, OP_BURSTSIZE, TX_BURST_MASK,
<------><------><------>ci->platdata->tx_burst_size << __ffs(TX_BURST_MASK));
 
<------><------>if (ci->platdata->flags & CI_HDRC_OVERRIDE_RX_BURST)
<------><------><------>hw_write(ci, OP_BURSTSIZE, RX_BURST_MASK,
<------><------><------><------>ci->platdata->rx_burst_size);
<------>}
}
 
/**
 * hw_controller_reset: do controller reset
 * @ci: the controller
  *
 * This function returns an error code
 */
static int hw_controller_reset(struct ci_hdrc *ci)
{
<------>int count = 0;
 
<------>hw_write(ci, OP_USBCMD, USBCMD_RST, USBCMD_RST);
<------>while (hw_read(ci, OP_USBCMD, USBCMD_RST)) {
<------><------>udelay(10);
<------><------>if (count++ > 1000)
<------><------><------>return -ETIMEDOUT;
<------>}
 
<------>return 0;
}
 
/**
 * hw_device_reset: resets chip (execute without interruption)
 * @ci: the controller
 *
 * This function returns an error code
 */
int hw_device_reset(struct ci_hdrc *ci)
{
<------>int ret;
 
<------>/* should flush & stop before reset */
<------>hw_write(ci, OP_ENDPTFLUSH, ~0, ~0);
<------>hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
 
<------>ret = hw_controller_reset(ci);
<------>if (ret) {
<------><------>dev_err(ci->dev, "error resetting controller, ret=%d\n", ret);
<------><------>return ret;
<------>}
 
<------>if (ci->platdata->notify_event) {
<------><------>ret = ci->platdata->notify_event(ci,
<------><------><------>CI_HDRC_CONTROLLER_RESET_EVENT);
<------><------>if (ret)
<------><------><------>return ret;
<------>}
 
<------>/* USBMODE should be configured step by step */
<------>hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
<------>hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_DC);
<------>/* HW >= 2.3 */
<------>hw_write(ci, OP_USBMODE, USBMODE_SLOM, USBMODE_SLOM);
 
<------>if (hw_read(ci, OP_USBMODE, USBMODE_CM) != USBMODE_CM_DC) {
<------><------>dev_err(ci->dev, "cannot enter in %s device mode\n",
<------><------><------>ci_role(ci)->name);
<------><------>dev_err(ci->dev, "lpm = %i\n", ci->hw_bank.lpm);
<------><------>return -ENODEV;
<------>}
 
<------>ci_platform_configure(ci);
 
<------>return 0;
}
 
static irqreturn_t ci_irq_handler(int irq, void *data)
{
<------>struct ci_hdrc *ci = data;
<------>irqreturn_t ret = IRQ_NONE;
<------>u32 otgsc = 0;
 
<------>if (ci->in_lpm) {
<------><------>disable_irq_nosync(irq);
<------><------>ci->wakeup_int = true;
<------><------>pm_runtime_get(ci->dev);
<------><------>return IRQ_HANDLED;
<------>}
 
<------>if (ci->is_otg) {
<------><------>otgsc = hw_read_otgsc(ci, ~0);
<------><------>if (ci_otg_is_fsm_mode(ci)) {
<------><------><------>ret = ci_otg_fsm_irq(ci);
<------><------><------>if (ret == IRQ_HANDLED)
<------><------><------><------>return ret;
<------><------>}
<------>}
 
<------>/*
<------> * Handle id change interrupt, it indicates device/host function
<------> * switch.
<------> */
<------>if (ci->is_otg && (otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS)) {
<------><------>ci->id_event = true;
<------><------>/* Clear ID change irq status */
<------><------>hw_write_otgsc(ci, OTGSC_IDIS, OTGSC_IDIS);
<------><------>ci_otg_queue_work(ci);
<------><------>return IRQ_HANDLED;
<------>}
 
<------>/*
<------> * Handle vbus change interrupt, it indicates device connection
<------> * and disconnection events.
<------> */
<------>if (ci->is_otg && (otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS)) {
<------><------>ci->b_sess_valid_event = true;
<------><------>/* Clear BSV irq */
<------><------>hw_write_otgsc(ci, OTGSC_BSVIS, OTGSC_BSVIS);
<------><------>ci_otg_queue_work(ci);
<------><------>return IRQ_HANDLED;
<------>}
 
<------>/* Handle device/host interrupt */
<------>if (ci->role != CI_ROLE_END)
<------><------>ret = ci_role(ci)->irq(ci);
 
<------>return ret;
}
 
static void ci_irq(struct ci_hdrc *ci)
{
<------>unsigned long flags;
 
<------>local_irq_save(flags);
<------>ci_irq_handler(ci->irq, ci);
<------>local_irq_restore(flags);
}
 
static int ci_cable_notifier(struct notifier_block *nb, unsigned long event,
<------><------><------>     void *ptr)
{
<------>struct ci_hdrc_cable *cbl = container_of(nb, struct ci_hdrc_cable, nb);
<------>struct ci_hdrc *ci = cbl->ci;
 
<------>cbl->connected = event;
<------>cbl->changed = true;
 
<------>ci_irq(ci);
<------>return NOTIFY_DONE;
}
 
static enum usb_role ci_usb_role_switch_get(struct usb_role_switch *sw)
{
<------>struct ci_hdrc *ci = usb_role_switch_get_drvdata(sw);
<------>enum usb_role role;
<------>unsigned long flags;
 
<------>spin_lock_irqsave(&ci->lock, flags);
<------>role = ci_role_to_usb_role(ci);
<------>spin_unlock_irqrestore(&ci->lock, flags);
 
<------>return role;
}
 
static int ci_usb_role_switch_set(struct usb_role_switch *sw,
<------><------><------><------>  enum usb_role role)
{
<------>struct ci_hdrc *ci = usb_role_switch_get_drvdata(sw);
<------>struct ci_hdrc_cable *cable = NULL;
<------>enum usb_role current_role = ci_role_to_usb_role(ci);
<------>enum ci_role ci_role = usb_role_to_ci_role(role);
<------>unsigned long flags;
 
<------>if ((ci_role != CI_ROLE_END && !ci->roles[ci_role]) ||
<------>    (current_role == role))
<------><------>return 0;
 
<------>pm_runtime_get_sync(ci->dev);
<------>/* Stop current role */
<------>spin_lock_irqsave(&ci->lock, flags);
<------>if (current_role == USB_ROLE_DEVICE)
<------><------>cable = &ci->platdata->vbus_extcon;
<------>else if (current_role == USB_ROLE_HOST)
<------><------>cable = &ci->platdata->id_extcon;
 
<------>if (cable) {
<------><------>cable->changed = true;
<------><------>cable->connected = false;
<------><------>ci_irq(ci);
<------><------>spin_unlock_irqrestore(&ci->lock, flags);
<------><------>if (ci->wq && role != USB_ROLE_NONE)
<------><------><------>flush_workqueue(ci->wq);
<------><------>spin_lock_irqsave(&ci->lock, flags);
<------>}
 
<------>cable = NULL;
 
<------>/* Start target role */
<------>if (role == USB_ROLE_DEVICE)
<------><------>cable = &ci->platdata->vbus_extcon;
<------>else if (role == USB_ROLE_HOST)
<------><------>cable = &ci->platdata->id_extcon;
 
<------>if (cable) {
<------><------>cable->changed = true;
<------><------>cable->connected = true;
<------><------>ci_irq(ci);
<------>}
<------>spin_unlock_irqrestore(&ci->lock, flags);
<------>pm_runtime_put_sync(ci->dev);
 
<------>return 0;
}
 
static struct usb_role_switch_desc ci_role_switch = {
<------>.set = ci_usb_role_switch_set,
<------>.get = ci_usb_role_switch_get,
<------>.allow_userspace_control = true,
};
 
static int ci_get_platdata(struct device *dev,
<------><------>struct ci_hdrc_platform_data *platdata)
{
<------>struct extcon_dev *ext_vbus, *ext_id;
<------>struct ci_hdrc_cable *cable;
<------>int ret;
 
<------>if (!platdata->phy_mode)
<------><------>platdata->phy_mode = of_usb_get_phy_mode(dev->of_node);
 
<------>if (!platdata->dr_mode)
<------><------>platdata->dr_mode = usb_get_dr_mode(dev);
 
<------>if (platdata->dr_mode == USB_DR_MODE_UNKNOWN)
<------><------>platdata->dr_mode = USB_DR_MODE_OTG;
 
<------>if (platdata->dr_mode != USB_DR_MODE_PERIPHERAL) {
<------><------>/* Get the vbus regulator */
<------><------>platdata->reg_vbus = devm_regulator_get_optional(dev, "vbus");
<------><------>if (PTR_ERR(platdata->reg_vbus) == -EPROBE_DEFER) {
<------><------><------>return -EPROBE_DEFER;
<------><------>} else if (PTR_ERR(platdata->reg_vbus) == -ENODEV) {
<------><------><------>/* no vbus regulator is needed */
<------><------><------>platdata->reg_vbus = NULL;
<------><------>} else if (IS_ERR(platdata->reg_vbus)) {
<------><------><------>dev_err(dev, "Getting regulator error: %ld\n",
<------><------><------><------>PTR_ERR(platdata->reg_vbus));
<------><------><------>return PTR_ERR(platdata->reg_vbus);
<------><------>}
<------><------>/* Get TPL support */
<------><------>if (!platdata->tpl_support)
<------><------><------>platdata->tpl_support =
<------><------><------><------>of_usb_host_tpl_support(dev->of_node);
<------>}
 
<------>if (platdata->dr_mode == USB_DR_MODE_OTG) {
<------><------>/* We can support HNP and SRP of OTG 2.0 */
<------><------>platdata->ci_otg_caps.otg_rev = 0x0200;
<------><------>platdata->ci_otg_caps.hnp_support = true;
<------><------>platdata->ci_otg_caps.srp_support = true;
 
<------><------>/* Update otg capabilities by DT properties */
<------><------>ret = of_usb_update_otg_caps(dev->of_node,
<------><------><------><------><------>&platdata->ci_otg_caps);
<------><------>if (ret)
<------><------><------>return ret;
<------>}
 
<------>if (usb_get_maximum_speed(dev) == USB_SPEED_FULL)
<------><------>platdata->flags |= CI_HDRC_FORCE_FULLSPEED;
 
<------>of_property_read_u32(dev->of_node, "phy-clkgate-delay-us",
<------><------><------><------>     &platdata->phy_clkgate_delay_us);
 
<------>platdata->itc_setting = 1;
 
<------>of_property_read_u32(dev->of_node, "itc-setting",
<------><------><------><------><------>&platdata->itc_setting);
 
<------>ret = of_property_read_u32(dev->of_node, "ahb-burst-config",
<------><------><------><------>&platdata->ahb_burst_config);
<------>if (!ret) {
<------><------>platdata->flags |= CI_HDRC_OVERRIDE_AHB_BURST;
<------>} else if (ret != -EINVAL) {
<------><------>dev_err(dev, "failed to get ahb-burst-config\n");
<------><------>return ret;
<------>}
 
<------>ret = of_property_read_u32(dev->of_node, "tx-burst-size-dword",
<------><------><------><------>&platdata->tx_burst_size);
<------>if (!ret) {
<------><------>platdata->flags |= CI_HDRC_OVERRIDE_TX_BURST;
<------>} else if (ret != -EINVAL) {
<------><------>dev_err(dev, "failed to get tx-burst-size-dword\n");
<------><------>return ret;
<------>}
 
<------>ret = of_property_read_u32(dev->of_node, "rx-burst-size-dword",
<------><------><------><------>&platdata->rx_burst_size);
<------>if (!ret) {
<------><------>platdata->flags |= CI_HDRC_OVERRIDE_RX_BURST;
<------>} else if (ret != -EINVAL) {
<------><------>dev_err(dev, "failed to get rx-burst-size-dword\n");
<------><------>return ret;
<------>}
 
<------>if (of_find_property(dev->of_node, "non-zero-ttctrl-ttha", NULL))
<------><------>platdata->flags |= CI_HDRC_SET_NON_ZERO_TTHA;
 
<------>ext_id = ERR_PTR(-ENODEV);
<------>ext_vbus = ERR_PTR(-ENODEV);
<------>if (of_property_read_bool(dev->of_node, "extcon")) {
<------><------>/* Each one of them is not mandatory */
<------><------>ext_vbus = extcon_get_edev_by_phandle(dev, 0);
<------><------>if (IS_ERR(ext_vbus) && PTR_ERR(ext_vbus) != -ENODEV)
<------><------><------>return PTR_ERR(ext_vbus);
 
<------><------>ext_id = extcon_get_edev_by_phandle(dev, 1);
<------><------>if (IS_ERR(ext_id) && PTR_ERR(ext_id) != -ENODEV)
<------><------><------>return PTR_ERR(ext_id);
<------>}
 
<------>cable = &platdata->vbus_extcon;
<------>cable->nb.notifier_call = ci_cable_notifier;
<------>cable->edev = ext_vbus;
 
<------>if (!IS_ERR(ext_vbus)) {
<------><------>ret = extcon_get_state(cable->edev, EXTCON_USB);
<------><------>if (ret)
<------><------><------>cable->connected = true;
<------><------>else
<------><------><------>cable->connected = false;
<------>}
 
<------>cable = &platdata->id_extcon;
<------>cable->nb.notifier_call = ci_cable_notifier;
<------>cable->edev = ext_id;
 
<------>if (!IS_ERR(ext_id)) {
<------><------>ret = extcon_get_state(cable->edev, EXTCON_USB_HOST);
<------><------>if (ret)
<------><------><------>cable->connected = true;
<------><------>else
<------><------><------>cable->connected = false;
<------>}
 
<------>if (device_property_read_bool(dev, "usb-role-switch"))
<------><------>ci_role_switch.fwnode = dev->fwnode;
 
<------>platdata->pctl = devm_pinctrl_get(dev);
<------>if (!IS_ERR(platdata->pctl)) {
<------><------>struct pinctrl_state *p;
 
<------><------>p = pinctrl_lookup_state(platdata->pctl, "default");
<------><------>if (!IS_ERR(p))
<------><------><------>platdata->pins_default = p;
 
<------><------>p = pinctrl_lookup_state(platdata->pctl, "host");
<------><------>if (!IS_ERR(p))
<------><------><------>platdata->pins_host = p;
 
<------><------>p = pinctrl_lookup_state(platdata->pctl, "device");
<------><------>if (!IS_ERR(p))
<------><------><------>platdata->pins_device = p;
<------>}
 
<------>return 0;
}
 
static int ci_extcon_register(struct ci_hdrc *ci)
{
<------>struct ci_hdrc_cable *id, *vbus;
<------>int ret;
 
<------>id = &ci->platdata->id_extcon;
<------>id->ci = ci;
<------>if (!IS_ERR_OR_NULL(id->edev)) {
<------><------>ret = devm_extcon_register_notifier(ci->dev, id->edev,
<------><------><------><------><------><------>EXTCON_USB_HOST, &id->nb);
<------><------>if (ret < 0) {
<------><------><------>dev_err(ci->dev, "register ID failed\n");
<------><------><------>return ret;
<------><------>}
<------>}
 
<------>vbus = &ci->platdata->vbus_extcon;
<------>vbus->ci = ci;
<------>if (!IS_ERR_OR_NULL(vbus->edev)) {
<------><------>ret = devm_extcon_register_notifier(ci->dev, vbus->edev,
<------><------><------><------><------><------>EXTCON_USB, &vbus->nb);
<------><------>if (ret < 0) {
<------><------><------>dev_err(ci->dev, "register VBUS failed\n");
<------><------><------>return ret;
<------><------>}
<------>}
 
<------>return 0;
}
 
static DEFINE_IDA(ci_ida);
 
struct platform_device *ci_hdrc_add_device(struct device *dev,
<------><------><------>struct resource *res, int nres,
<------><------><------>struct ci_hdrc_platform_data *platdata)
{
<------>struct platform_device *pdev;
<------>int id, ret;
 
<------>ret = ci_get_platdata(dev, platdata);
<------>if (ret)
<------><------>return ERR_PTR(ret);
 
<------>id = ida_simple_get(&ci_ida, 0, 0, GFP_KERNEL);
<------>if (id < 0)
<------><------>return ERR_PTR(id);
 
<------>pdev = platform_device_alloc("ci_hdrc", id);
<------>if (!pdev) {
<------><------>ret = -ENOMEM;
<------><------>goto put_id;
<------>}
 
<------>pdev->dev.parent = dev;
 
<------>ret = platform_device_add_resources(pdev, res, nres);
<------>if (ret)
<------><------>goto err;
 
<------>ret = platform_device_add_data(pdev, platdata, sizeof(*platdata));
<------>if (ret)
<------><------>goto err;
 
<------>ret = platform_device_add(pdev);
<------>if (ret)
<------><------>goto err;
 
<------>return pdev;
 
err:
<------>platform_device_put(pdev);
put_id:
<------>ida_simple_remove(&ci_ida, id);
<------>return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(ci_hdrc_add_device);
 
void ci_hdrc_remove_device(struct platform_device *pdev)
{
<------>int id = pdev->id;
<------>platform_device_unregister(pdev);
<------>ida_simple_remove(&ci_ida, id);
}
EXPORT_SYMBOL_GPL(ci_hdrc_remove_device);
 
/**
 * ci_hdrc_query_available_role: get runtime available operation mode
 *
 * The glue layer can get current operation mode (host/peripheral/otg)
 * This function should be called after ci core device has created.
 *
 * @pdev: the platform device of ci core.
 *
 * Return runtime usb_dr_mode.
 */
enum usb_dr_mode ci_hdrc_query_available_role(struct platform_device *pdev)
{
<------>struct ci_hdrc *ci = platform_get_drvdata(pdev);
 
<------>if (!ci)
<------><------>return USB_DR_MODE_UNKNOWN;
<------>if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET])
<------><------>return USB_DR_MODE_OTG;
<------>else if (ci->roles[CI_ROLE_HOST])
<------><------>return USB_DR_MODE_HOST;
<------>else if (ci->roles[CI_ROLE_GADGET])
<------><------>return USB_DR_MODE_PERIPHERAL;
<------>else
<------><------>return USB_DR_MODE_UNKNOWN;
}
EXPORT_SYMBOL_GPL(ci_hdrc_query_available_role);
 
static inline void ci_role_destroy(struct ci_hdrc *ci)
{
<------>ci_hdrc_gadget_destroy(ci);
<------>ci_hdrc_host_destroy(ci);
<------>if (ci->is_otg && ci->roles[CI_ROLE_GADGET])
<------><------>ci_hdrc_otg_destroy(ci);
}
 
static void ci_get_otg_capable(struct ci_hdrc *ci)
{
<------>if (ci->platdata->flags & CI_HDRC_DUAL_ROLE_NOT_OTG)
<------><------>ci->is_otg = false;
<------>else
<------><------>ci->is_otg = (hw_read(ci, CAP_DCCPARAMS,
<------><------><------><------>DCCPARAMS_DC | DCCPARAMS_HC)
<------><------><------><------><------>== (DCCPARAMS_DC | DCCPARAMS_HC));
<------>if (ci->is_otg) {
<------><------>dev_dbg(ci->dev, "It is OTG capable controller\n");
<------><------>/* Disable and clear all OTG irq */
<------><------>hw_write_otgsc(ci, OTGSC_INT_EN_BITS | OTGSC_INT_STATUS_BITS,
<------><------><------><------><------><------><------>OTGSC_INT_STATUS_BITS);
<------>}
}
 
static ssize_t role_show(struct device *dev, struct device_attribute *attr,
<------><------><------>  char *buf)
{
<------>struct ci_hdrc *ci = dev_get_drvdata(dev);
 
<------>if (ci->role != CI_ROLE_END)
<------><------>return sprintf(buf, "%s\n", ci_role(ci)->name);
 
<------>return 0;
}
 
static ssize_t role_store(struct device *dev,
<------><------>struct device_attribute *attr, const char *buf, size_t n)
{
<------>struct ci_hdrc *ci = dev_get_drvdata(dev);
<------>enum ci_role role;
<------>int ret;
 
<------>if (!(ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET])) {
<------><------>dev_warn(dev, "Current configuration is not dual-role, quit\n");
<------><------>return -EPERM;
<------>}
 
<------>for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++)
<------><------>if (!strncmp(buf, ci->roles[role]->name,
<------><------><------>     strlen(ci->roles[role]->name)))
<------><------><------>break;
 
<------>if (role == CI_ROLE_END || role == ci->role)
<------><------>return -EINVAL;
 
<------>pm_runtime_get_sync(dev);
<------>disable_irq(ci->irq);
<------>ci_role_stop(ci);
<------>ret = ci_role_start(ci, role);
<------>if (!ret && ci->role == CI_ROLE_GADGET)
<------><------>ci_handle_vbus_change(ci);
<------>enable_irq(ci->irq);
<------>pm_runtime_put_sync(dev);
 
<------>return (ret == 0) ? n : ret;
}
static DEVICE_ATTR_RW(role);
 
static struct attribute *ci_attrs[] = {
<------>&dev_attr_role.attr,
<------>NULL,
};
ATTRIBUTE_GROUPS(ci);
 
static int ci_hdrc_probe(struct platform_device *pdev)
{
<------>struct device	*dev = &pdev->dev;
<------>struct ci_hdrc	*ci;
<------>struct resource	*res;
<------>void __iomem	*base;
<------>int		ret;
<------>enum usb_dr_mode dr_mode;
 
<------>if (!dev_get_platdata(dev)) {
<------><------>dev_err(dev, "platform data missing\n");
<------><------>return -ENODEV;
<------>}
 
<------>res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
<------>base = devm_ioremap_resource(dev, res);
<------>if (IS_ERR(base))
<------><------>return PTR_ERR(base);
 
<------>ci = devm_kzalloc(dev, sizeof(*ci), GFP_KERNEL);
<------>if (!ci)
<------><------>return -ENOMEM;
 
<------>spin_lock_init(&ci->lock);
<------>ci->dev = dev;
<------>ci->platdata = dev_get_platdata(dev);
<------>ci->imx28_write_fix = !!(ci->platdata->flags &
<------><------>CI_HDRC_IMX28_WRITE_FIX);
<------>ci->supports_runtime_pm = !!(ci->platdata->flags &
<------><------>CI_HDRC_SUPPORTS_RUNTIME_PM);
<------>platform_set_drvdata(pdev, ci);
 
<------>ret = hw_device_init(ci, base);
<------>if (ret < 0) {
<------><------>dev_err(dev, "can't initialize hardware\n");
<------><------>return -ENODEV;
<------>}
 
<------>ret = ci_ulpi_init(ci);
<------>if (ret)
<------><------>return ret;
 
<------>if (ci->platdata->phy) {
<------><------>ci->phy = ci->platdata->phy;
<------>} else if (ci->platdata->usb_phy) {
<------><------>ci->usb_phy = ci->platdata->usb_phy;
<------>} else {
<------><------>/* Look for a generic PHY first */
<------><------>ci->phy = devm_phy_get(dev->parent, "usb-phy");
 
<------><------>if (PTR_ERR(ci->phy) == -EPROBE_DEFER) {
<------><------><------>ret = -EPROBE_DEFER;
<------><------><------>goto ulpi_exit;
<------><------>} else if (IS_ERR(ci->phy)) {
<------><------><------>ci->phy = NULL;
<------><------>}
 
<------><------>/* Look for a legacy USB PHY from device-tree next */
<------><------>if (!ci->phy) {
<------><------><------>ci->usb_phy = devm_usb_get_phy_by_phandle(dev->parent,
<------><------><------><------><------><------><------><------>  "phys", 0);
 
<------><------><------>if (PTR_ERR(ci->usb_phy) == -EPROBE_DEFER) {
<------><------><------><------>ret = -EPROBE_DEFER;
<------><------><------><------>goto ulpi_exit;
<------><------><------>} else if (IS_ERR(ci->usb_phy)) {
<------><------><------><------>ci->usb_phy = NULL;
<------><------><------>}
<------><------>}
 
<------><------>/* Look for any registered legacy USB PHY as last resort */
<------><------>if (!ci->phy && !ci->usb_phy) {
<------><------><------>ci->usb_phy = devm_usb_get_phy(dev->parent,
<------><------><------><------><------><------>       USB_PHY_TYPE_USB2);
 
<------><------><------>if (PTR_ERR(ci->usb_phy) == -EPROBE_DEFER) {
<------><------><------><------>ret = -EPROBE_DEFER;
<------><------><------><------>goto ulpi_exit;
<------><------><------>} else if (IS_ERR(ci->usb_phy)) {
<------><------><------><------>ci->usb_phy = NULL;
<------><------><------>}
<------><------>}
 
<------><------>/* No USB PHY was found in the end */
<------><------>if (!ci->phy && !ci->usb_phy) {
<------><------><------>ret = -ENXIO;
<------><------><------>goto ulpi_exit;
<------><------>}
<------>}
 
<------>ret = ci_usb_phy_init(ci);
<------>if (ret) {
<------><------>dev_err(dev, "unable to init phy: %d\n", ret);
<------><------>return ret;
<------>}
 
<------>ci->hw_bank.phys = res->start;
 
<------>ci->irq = platform_get_irq(pdev, 0);
<------>if (ci->irq < 0) {
<------><------>ret = ci->irq;
<------><------>goto deinit_phy;
<------>}
 
<------>ci_get_otg_capable(ci);
 
<------>dr_mode = ci->platdata->dr_mode;
<------>/* initialize role(s) before the interrupt is requested */
<------>if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_HOST) {
<------><------>ret = ci_hdrc_host_init(ci);
<------><------>if (ret) {
<------><------><------>if (ret == -ENXIO)
<------><------><------><------>dev_info(dev, "doesn't support host\n");
<------><------><------>else
<------><------><------><------>goto deinit_phy;
<------><------>}
<------>}
 
<------>if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_PERIPHERAL) {
<------><------>ret = ci_hdrc_gadget_init(ci);
<------><------>if (ret) {
<------><------><------>if (ret == -ENXIO)
<------><------><------><------>dev_info(dev, "doesn't support gadget\n");
<------><------><------>else
<------><------><------><------>goto deinit_host;
<------><------>}
<------>}
 
<------>if (!ci->roles[CI_ROLE_HOST] && !ci->roles[CI_ROLE_GADGET]) {
<------><------>dev_err(dev, "no supported roles\n");
<------><------>ret = -ENODEV;
<------><------>goto deinit_gadget;
<------>}
 
<------>if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) {
<------><------>ret = ci_hdrc_otg_init(ci);
<------><------>if (ret) {
<------><------><------>dev_err(dev, "init otg fails, ret = %d\n", ret);
<------><------><------>goto deinit_gadget;
<------><------>}
<------>}
 
<------>if (ci_role_switch.fwnode) {
<------><------>ci_role_switch.driver_data = ci;
<------><------>ci->role_switch = usb_role_switch_register(dev,
<------><------><------><------><------>&ci_role_switch);
<------><------>if (IS_ERR(ci->role_switch)) {
<------><------><------>ret = PTR_ERR(ci->role_switch);
<------><------><------>goto deinit_otg;
<------><------>}
<------>}
 
<------>if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) {
<------><------>if (ci->is_otg) {
<------><------><------>ci->role = ci_otg_role(ci);
<------><------><------>/* Enable ID change irq */
<------><------><------>hw_write_otgsc(ci, OTGSC_IDIE, OTGSC_IDIE);
<------><------>} else {
<------><------><------>/*
<------><------><------> * If the controller is not OTG capable, but support
<------><------><------> * role switch, the defalt role is gadget, and the
<------><------><------> * user can switch it through debugfs.
<------><------><------> */
<------><------><------>ci->role = CI_ROLE_GADGET;
<------><------>}
<------>} else {
<------><------>ci->role = ci->roles[CI_ROLE_HOST]
<------><------><------>? CI_ROLE_HOST
<------><------><------>: CI_ROLE_GADGET;
<------>}
 
<------>if (!ci_otg_is_fsm_mode(ci)) {
<------><------>/* only update vbus status for peripheral */
<------><------>if (ci->role == CI_ROLE_GADGET) {
<------><------><------>/* Pull down DP for possible charger detection */
<------><------><------>hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
<------><------><------>ci_handle_vbus_change(ci);
<------><------>}
 
<------><------>ret = ci_role_start(ci, ci->role);
<------><------>if (ret) {
<------><------><------>dev_err(dev, "can't start %s role\n",
<------><------><------><------><------><------>ci_role(ci)->name);
<------><------><------>goto stop;
<------><------>}
<------>}
 
<------>ret = devm_request_irq(dev, ci->irq, ci_irq_handler, IRQF_SHARED,
<------><------><------>ci->platdata->name, ci);
<------>if (ret)
<------><------>goto stop;
 
<------>ret = ci_extcon_register(ci);
<------>if (ret)
<------><------>goto stop;
 
<------>if (ci->supports_runtime_pm) {
<------><------>pm_runtime_set_active(&pdev->dev);
<------><------>pm_runtime_enable(&pdev->dev);
<------><------>pm_runtime_set_autosuspend_delay(&pdev->dev, 2000);
<------><------>pm_runtime_mark_last_busy(ci->dev);
<------><------>pm_runtime_use_autosuspend(&pdev->dev);
<------>}
 
<------>if (ci_otg_is_fsm_mode(ci))
<------><------>ci_hdrc_otg_fsm_start(ci);
 
<------>device_set_wakeup_capable(&pdev->dev, true);
<------>dbg_create_files(ci);
 
<------>return 0;
 
stop:
<------>if (ci->role_switch)
<------><------>usb_role_switch_unregister(ci->role_switch);
deinit_otg:
<------>if (ci->is_otg && ci->roles[CI_ROLE_GADGET])
<------><------>ci_hdrc_otg_destroy(ci);
deinit_gadget:
<------>ci_hdrc_gadget_destroy(ci);
deinit_host:
<------>ci_hdrc_host_destroy(ci);
deinit_phy:
<------>ci_usb_phy_exit(ci);
ulpi_exit:
<------>ci_ulpi_exit(ci);
 
<------>return ret;
}
 
static int ci_hdrc_remove(struct platform_device *pdev)
{
<------>struct ci_hdrc *ci = platform_get_drvdata(pdev);
 
<------>if (ci->role_switch)
<------><------>usb_role_switch_unregister(ci->role_switch);
 
<------>if (ci->supports_runtime_pm) {
<------><------>pm_runtime_get_sync(&pdev->dev);
<------><------>pm_runtime_disable(&pdev->dev);
<------><------>pm_runtime_put_noidle(&pdev->dev);
<------>}
 
<------>dbg_remove_files(ci);
<------>ci_role_destroy(ci);
<------>ci_hdrc_enter_lpm(ci, true);
<------>ci_usb_phy_exit(ci);
<------>ci_ulpi_exit(ci);
 
<------>return 0;
}
 
#ifdef CONFIG_PM
/* Prepare wakeup by SRP before suspend */
static void ci_otg_fsm_suspend_for_srp(struct ci_hdrc *ci)
{
<------>if ((ci->fsm.otg->state == OTG_STATE_A_IDLE) &&
<------><------><------><------>!hw_read_otgsc(ci, OTGSC_ID)) {
<------><------>hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_PP,
<------><------><------><------><------><------><------><------>PORTSC_PP);
<------><------>hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_WKCN,
<------><------><------><------><------><------><------><------>PORTSC_WKCN);
<------>}
}
 
/* Handle SRP when wakeup by data pulse */
static void ci_otg_fsm_wakeup_by_srp(struct ci_hdrc *ci)
{
<------>if ((ci->fsm.otg->state == OTG_STATE_A_IDLE) &&
<------><------>(ci->fsm.a_bus_drop == 1) && (ci->fsm.a_bus_req == 0)) {
<------><------>if (!hw_read_otgsc(ci, OTGSC_ID)) {
<------><------><------>ci->fsm.a_srp_det = 1;
<------><------><------>ci->fsm.a_bus_drop = 0;
<------><------>} else {
<------><------><------>ci->fsm.id = 1;
<------><------>}
<------><------>ci_otg_queue_work(ci);
<------>}
}
 
static void ci_controller_suspend(struct ci_hdrc *ci)
{
<------>disable_irq(ci->irq);
<------>ci_hdrc_enter_lpm(ci, true);
<------>if (ci->platdata->phy_clkgate_delay_us)
<------><------>usleep_range(ci->platdata->phy_clkgate_delay_us,
<------><------><------>     ci->platdata->phy_clkgate_delay_us + 50);
<------>usb_phy_set_suspend(ci->usb_phy, 1);
<------>ci->in_lpm = true;
<------>enable_irq(ci->irq);
}
 
/*
 * Handle the wakeup interrupt triggered by extcon connector
 * We need to call ci_irq again for extcon since the first
 * interrupt (wakeup int) only let the controller be out of
 * low power mode, but not handle any interrupts.
 */
static void ci_extcon_wakeup_int(struct ci_hdrc *ci)
{
<------>struct ci_hdrc_cable *cable_id, *cable_vbus;
<------>u32 otgsc = hw_read_otgsc(ci, ~0);
 
<------>cable_id = &ci->platdata->id_extcon;
<------>cable_vbus = &ci->platdata->vbus_extcon;
 
<------>if (!IS_ERR(cable_id->edev) && ci->is_otg &&
<------><------>(otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS))
<------><------>ci_irq(ci);
 
<------>if (!IS_ERR(cable_vbus->edev) && ci->is_otg &&
<------><------>(otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS))
<------><------>ci_irq(ci);
}
 
static int ci_controller_resume(struct device *dev)
{
<------>struct ci_hdrc *ci = dev_get_drvdata(dev);
<------>int ret;
 
<------>dev_dbg(dev, "at %s\n", __func__);
 
<------>if (!ci->in_lpm) {
<------><------>WARN_ON(1);
<------><------>return 0;
<------>}
 
<------>ci_hdrc_enter_lpm(ci, false);
 
<------>ret = ci_ulpi_resume(ci);
<------>if (ret)
<------><------>return ret;
 
<------>if (ci->usb_phy) {
<------><------>usb_phy_set_suspend(ci->usb_phy, 0);
<------><------>usb_phy_set_wakeup(ci->usb_phy, false);
<------><------>hw_wait_phy_stable();
<------>}
 
<------>ci->in_lpm = false;
<------>if (ci->wakeup_int) {
<------><------>ci->wakeup_int = false;
<------><------>pm_runtime_mark_last_busy(ci->dev);
<------><------>pm_runtime_put_autosuspend(ci->dev);
<------><------>enable_irq(ci->irq);
<------><------>if (ci_otg_is_fsm_mode(ci))
<------><------><------>ci_otg_fsm_wakeup_by_srp(ci);
<------><------>ci_extcon_wakeup_int(ci);
<------>}
 
<------>return 0;
}
 
#ifdef CONFIG_PM_SLEEP
static int ci_suspend(struct device *dev)
{
<------>struct ci_hdrc *ci = dev_get_drvdata(dev);
 
<------>if (ci->wq)
<------><------>flush_workqueue(ci->wq);
<------>/*
<------> * Controller needs to be active during suspend, otherwise the core
<------> * may run resume when the parent is at suspend if other driver's
<------> * suspend fails, it occurs before parent's suspend has not started,
<------> * but the core suspend has finished.
<------> */
<------>if (ci->in_lpm)
<------><------>pm_runtime_resume(dev);
 
<------>if (ci->in_lpm) {
<------><------>WARN_ON(1);
<------><------>return 0;
<------>}
 
<------>if (device_may_wakeup(dev)) {
<------><------>if (ci_otg_is_fsm_mode(ci))
<------><------><------>ci_otg_fsm_suspend_for_srp(ci);
 
<------><------>usb_phy_set_wakeup(ci->usb_phy, true);
<------><------>enable_irq_wake(ci->irq);
<------>}
 
<------>ci_controller_suspend(ci);
 
<------>return 0;
}
 
static int ci_resume(struct device *dev)
{
<------>struct ci_hdrc *ci = dev_get_drvdata(dev);
<------>int ret;
 
<------>if (device_may_wakeup(dev))
<------><------>disable_irq_wake(ci->irq);
 
<------>ret = ci_controller_resume(dev);
<------>if (ret)
<------><------>return ret;
 
<------>if (ci->supports_runtime_pm) {
<------><------>pm_runtime_disable(dev);
<------><------>pm_runtime_set_active(dev);
<------><------>pm_runtime_enable(dev);
<------>}
 
<------>return ret;
}
#endif /* CONFIG_PM_SLEEP */
 
static int ci_runtime_suspend(struct device *dev)
{
<------>struct ci_hdrc *ci = dev_get_drvdata(dev);
 
<------>dev_dbg(dev, "at %s\n", __func__);
 
<------>if (ci->in_lpm) {
<------><------>WARN_ON(1);
<------><------>return 0;
<------>}
 
<------>if (ci_otg_is_fsm_mode(ci))
<------><------>ci_otg_fsm_suspend_for_srp(ci);
 
<------>usb_phy_set_wakeup(ci->usb_phy, true);
<------>ci_controller_suspend(ci);
 
<------>return 0;
}
 
static int ci_runtime_resume(struct device *dev)
{
<------>return ci_controller_resume(dev);
}
 
#endif /* CONFIG_PM */
static const struct dev_pm_ops ci_pm_ops = {
<------>SET_SYSTEM_SLEEP_PM_OPS(ci_suspend, ci_resume)
<------>SET_RUNTIME_PM_OPS(ci_runtime_suspend, ci_runtime_resume, NULL)
};
 
static struct platform_driver ci_hdrc_driver = {
<------>.probe	= ci_hdrc_probe,
<------>.remove	= ci_hdrc_remove,
<------>.driver	= {
<------><------>.name	= "ci_hdrc",
<------><------>.pm	= &ci_pm_ops,
<------><------>.dev_groups = ci_groups,
<------>},
};
 
static int __init ci_hdrc_platform_register(void)
{
<------>ci_hdrc_host_driver_init();
<------>return platform_driver_register(&ci_hdrc_driver);
}
module_init(ci_hdrc_platform_register);
 
static void __exit ci_hdrc_platform_unregister(void)
{
<------>platform_driver_unregister(&ci_hdrc_driver);
}
module_exit(ci_hdrc_platform_unregister);
 
MODULE_ALIAS("platform:ci_hdrc");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("David Lopo <dlopo@chipidea.mips.com>");
MODULE_DESCRIPTION("ChipIdea HDRC Driver");
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