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usb: tegra: Changes for v5.14-rc1

Browse source 
Implements proper suspend/resume for the XUSB controller found on recent
 Tegra chips.
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Merge tag 'for-5.14-usb' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into usb-next

Thierry writes:

usb: tegra: Changes for v5.14-rc1

Implements proper suspend/resume for the XUSB controller found on recent
Tegra chips.

* tag 'for-5.14-usb' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  usb: xhci: tegra: Enable ELPG for runtime/system PM
  usb: xhci: tegra: Unlink power domain devices
  phy: tegra: xusb: Add wake/sleepwalk for Tegra186
  phy: tegra: xusb: Tegra210 host mode VBUS control
  phy: tegra: xusb: Add wake/sleepwalk for Tegra210
  phy: tegra: xusb: Add sleepwalk and suspend/resume
  phy: tegra: xusb: Add Tegra210 lane_iddq operation
  phy: tegra: xusb: Rearrange UPHY init on Tegra210
  phy: tegra: xusb: Move usb3 port init for Tegra210
This commit is contained in:
Greg Kroah-Hartman 2021-06-14 10:27:09 +02:00
commit 66165dba29
6 changed files with 2437 additions and 383 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

550
drivers/phy/tegra/xusb-tegra186.c
View file

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2016-2019, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2016-2020, NVIDIA CORPORATION. All rights reserved.
*/
#include <linux/delay.h>
@ -113,6 +113,117 @@
#define ID_OVERRIDE_FLOATING ID_OVERRIDE(8)
#define ID_OVERRIDE_GROUNDED ID_OVERRIDE(0)
/* XUSB AO registers */
#define XUSB_AO_USB_DEBOUNCE_DEL (0x4)
#define UHSIC_LINE_DEB_CNT(x) (((x) & 0xf) << 4)
#define UTMIP_LINE_DEB_CNT(x) ((x) & 0xf)
#define XUSB_AO_UTMIP_TRIGGERS(x) (0x40 + (x) * 4)
#define CLR_WALK_PTR BIT(0)
#define CAP_CFG BIT(1)
#define CLR_WAKE_ALARM BIT(3)
#define XUSB_AO_UHSIC_TRIGGERS(x) (0x60 + (x) * 4)
#define HSIC_CLR_WALK_PTR BIT(0)
#define HSIC_CLR_WAKE_ALARM BIT(3)
#define HSIC_CAP_CFG BIT(4)
#define XUSB_AO_UTMIP_SAVED_STATE(x) (0x70 + (x) * 4)
#define SPEED(x) ((x) & 0x3)
#define UTMI_HS SPEED(0)
#define UTMI_FS SPEED(1)
#define UTMI_LS SPEED(2)
#define UTMI_RST SPEED(3)
#define XUSB_AO_UHSIC_SAVED_STATE(x) (0x90 + (x) * 4)
#define MODE(x) ((x) & 0x1)
#define MODE_HS MODE(0)
#define MODE_RST MODE(1)
#define XUSB_AO_UTMIP_SLEEPWALK_CFG(x) (0xd0 + (x) * 4)
#define XUSB_AO_UHSIC_SLEEPWALK_CFG(x) (0xf0 + (x) * 4)
#define FAKE_USBOP_VAL BIT(0)
#define FAKE_USBON_VAL BIT(1)
#define FAKE_USBOP_EN BIT(2)
#define FAKE_USBON_EN BIT(3)
#define FAKE_STROBE_VAL BIT(0)
#define FAKE_DATA_VAL BIT(1)
#define FAKE_STROBE_EN BIT(2)
#define FAKE_DATA_EN BIT(3)
#define WAKE_WALK_EN BIT(14)
#define MASTER_ENABLE BIT(15)
#define LINEVAL_WALK_EN BIT(16)
#define WAKE_VAL(x) (((x) & 0xf) << 17)
#define WAKE_VAL_NONE WAKE_VAL(12)
#define WAKE_VAL_ANY WAKE_VAL(15)
#define WAKE_VAL_DS10 WAKE_VAL(2)
#define LINE_WAKEUP_EN BIT(21)
#define MASTER_CFG_SEL BIT(22)
#define XUSB_AO_UTMIP_SLEEPWALK(x) (0x100 + (x) * 4)
/* phase A */
#define USBOP_RPD_A BIT(0)
#define USBON_RPD_A BIT(1)
#define AP_A BIT(4)
#define AN_A BIT(5)
#define HIGHZ_A BIT(6)
/* phase B */
#define USBOP_RPD_B BIT(8)
#define USBON_RPD_B BIT(9)
#define AP_B BIT(12)
#define AN_B BIT(13)
#define HIGHZ_B BIT(14)
/* phase C */
#define USBOP_RPD_C BIT(16)
#define USBON_RPD_C BIT(17)
#define AP_C BIT(20)
#define AN_C BIT(21)
#define HIGHZ_C BIT(22)
/* phase D */
#define USBOP_RPD_D BIT(24)
#define USBON_RPD_D BIT(25)
#define AP_D BIT(28)
#define AN_D BIT(29)
#define HIGHZ_D BIT(30)
#define XUSB_AO_UHSIC_SLEEPWALK(x) (0x120 + (x) * 4)
/* phase A */
#define RPD_STROBE_A BIT(0)
#define RPD_DATA0_A BIT(1)
#define RPU_STROBE_A BIT(2)
#define RPU_DATA0_A BIT(3)
/* phase B */
#define RPD_STROBE_B BIT(8)
#define RPD_DATA0_B BIT(9)
#define RPU_STROBE_B BIT(10)
#define RPU_DATA0_B BIT(11)
/* phase C */
#define RPD_STROBE_C BIT(16)
#define RPD_DATA0_C BIT(17)
#define RPU_STROBE_C BIT(18)
#define RPU_DATA0_C BIT(19)
/* phase D */
#define RPD_STROBE_D BIT(24)
#define RPD_DATA0_D BIT(25)
#define RPU_STROBE_D BIT(26)
#define RPU_DATA0_D BIT(27)
#define XUSB_AO_UTMIP_PAD_CFG(x) (0x130 + (x) * 4)
#define FSLS_USE_XUSB_AO BIT(3)
#define TRK_CTRL_USE_XUSB_AO BIT(4)
#define RPD_CTRL_USE_XUSB_AO BIT(5)
#define RPU_USE_XUSB_AO BIT(6)
#define VREG_USE_XUSB_AO BIT(7)
#define USBOP_VAL_PD BIT(8)
#define USBON_VAL_PD BIT(9)
#define E_DPD_OVRD_EN BIT(10)
#define E_DPD_OVRD_VAL BIT(11)
#define XUSB_AO_UHSIC_PAD_CFG(x) (0x150 + (x) * 4)
#define STROBE_VAL_PD BIT(0)
#define DATA0_VAL_PD BIT(1)
#define USE_XUSB_AO BIT(4)
#define TEGRA186_LANE(_name, _offset, _shift, _mask, _type) \
{ \
.name = _name, \
@ -130,16 +241,37 @@ struct tegra_xusb_fuse_calibration {
u32 rpd_ctrl;
};
struct tegra186_xusb_padctl_context {
u32 vbus_id;
u32 usb2_pad_mux;
u32 usb2_port_cap;
u32 ss_port_cap;
};
struct tegra186_xusb_padctl {
struct tegra_xusb_padctl base;
void __iomem *ao_regs;
struct tegra_xusb_fuse_calibration calib;
/* UTMI bias and tracking */
struct clk *usb2_trk_clk;
unsigned int bias_pad_enable;
/* padctl context */
struct tegra186_xusb_padctl_context context;
};
static inline void ao_writel(struct tegra186_xusb_padctl *priv, u32 value, unsigned int offset)
{
writel(value, priv->ao_regs + offset);
}
static inline u32 ao_readl(struct tegra186_xusb_padctl *priv, unsigned int offset)
{
return readl(priv->ao_regs + offset);
}
static inline struct tegra186_xusb_padctl *
to_tegra186_xusb_padctl(struct tegra_xusb_padctl *padctl)
{
@ -180,9 +312,264 @@ static void tegra186_usb2_lane_remove(struct tegra_xusb_lane *lane)
kfree(usb2);
}
static int tegra186_utmi_enable_phy_sleepwalk(struct tegra_xusb_lane *lane,
enum usb_device_speed speed)
{
struct tegra_xusb_padctl *padctl = lane->pad->padctl;
struct tegra186_xusb_padctl *priv = to_tegra186_xusb_padctl(padctl);
unsigned int index = lane->index;
u32 value;
mutex_lock(&padctl->lock);
/* ensure sleepwalk logic is disabled */
value = ao_readl(priv, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
value &= ~MASTER_ENABLE;
ao_writel(priv, value, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
/* ensure sleepwalk logics are in low power mode */
value = ao_readl(priv, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
value |= MASTER_CFG_SEL;
ao_writel(priv, value, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
/* set debounce time */
value = ao_readl(priv, XUSB_AO_USB_DEBOUNCE_DEL);
value &= ~UTMIP_LINE_DEB_CNT(~0);
value |= UTMIP_LINE_DEB_CNT(1);
ao_writel(priv, value, XUSB_AO_USB_DEBOUNCE_DEL);
/* ensure fake events of sleepwalk logic are desiabled */
value = ao_readl(priv, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
value &= ~(FAKE_USBOP_VAL | FAKE_USBON_VAL |
FAKE_USBOP_EN | FAKE_USBON_EN);
ao_writel(priv, value, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
/* ensure wake events of sleepwalk logic are not latched */
value = ao_readl(priv, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
value &= ~LINE_WAKEUP_EN;
ao_writel(priv, value, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
/* disable wake event triggers of sleepwalk logic */
value = ao_readl(priv, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
value &= ~WAKE_VAL(~0);
value |= WAKE_VAL_NONE;
ao_writel(priv, value, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
/* power down the line state detectors of the pad */
value = ao_readl(priv, XUSB_AO_UTMIP_PAD_CFG(index));
value |= (USBOP_VAL_PD | USBON_VAL_PD);
ao_writel(priv, value, XUSB_AO_UTMIP_PAD_CFG(index));
/* save state per speed */
value = ao_readl(priv, XUSB_AO_UTMIP_SAVED_STATE(index));
value &= ~SPEED(~0);
switch (speed) {
case USB_SPEED_HIGH:
value |= UTMI_HS;
break;
case USB_SPEED_FULL:
value |= UTMI_FS;
break;
case USB_SPEED_LOW:
value |= UTMI_LS;
break;
default:
value |= UTMI_RST;
break;
}
ao_writel(priv, value, XUSB_AO_UTMIP_SAVED_STATE(index));
/* enable the trigger of the sleepwalk logic */
value = ao_readl(priv, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
value |= LINEVAL_WALK_EN;
value &= ~WAKE_WALK_EN;
ao_writel(priv, value, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
/* reset the walk pointer and clear the alarm of the sleepwalk logic,
* as well as capture the configuration of the USB2.0 pad
*/
value = ao_readl(priv, XUSB_AO_UTMIP_TRIGGERS(index));
value |= (CLR_WALK_PTR | CLR_WAKE_ALARM | CAP_CFG);
ao_writel(priv, value, XUSB_AO_UTMIP_TRIGGERS(index));
/* setup the pull-ups and pull-downs of the signals during the four
* stages of sleepwalk.
* if device is connected, program sleepwalk logic to maintain a J and
* keep driving K upon seeing remote wake.
*/
value = USBOP_RPD_A | USBOP_RPD_B | USBOP_RPD_C | USBOP_RPD_D;
value |= USBON_RPD_A | USBON_RPD_B | USBON_RPD_C | USBON_RPD_D;
switch (speed) {
case USB_SPEED_HIGH:
case USB_SPEED_FULL:
/* J state: D+/D- = high/low, K state: D+/D- = low/high */
value |= HIGHZ_A;
value |= AP_A;
value |= AN_B | AN_C | AN_D;
break;
case USB_SPEED_LOW:
/* J state: D+/D- = low/high, K state: D+/D- = high/low */
value |= HIGHZ_A;
value |= AN_A;
value |= AP_B | AP_C | AP_D;
break;
default:
value |= HIGHZ_A | HIGHZ_B | HIGHZ_C | HIGHZ_D;
break;
}
ao_writel(priv, value, XUSB_AO_UTMIP_SLEEPWALK(index));
/* power up the line state detectors of the pad */
value = ao_readl(priv, XUSB_AO_UTMIP_PAD_CFG(index));
value &= ~(USBOP_VAL_PD | USBON_VAL_PD);
ao_writel(priv, value, XUSB_AO_UTMIP_PAD_CFG(index));
usleep_range(150, 200);
/* switch the electric control of the USB2.0 pad to XUSB_AO */
value = ao_readl(priv, XUSB_AO_UTMIP_PAD_CFG(index));
value |= FSLS_USE_XUSB_AO | TRK_CTRL_USE_XUSB_AO | RPD_CTRL_USE_XUSB_AO |
RPU_USE_XUSB_AO | VREG_USE_XUSB_AO;
ao_writel(priv, value, XUSB_AO_UTMIP_PAD_CFG(index));
/* set the wake signaling trigger events */
value = ao_readl(priv, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
value &= ~WAKE_VAL(~0);
value |= WAKE_VAL_ANY;
ao_writel(priv, value, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
/* enable the wake detection */
value = ao_readl(priv, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
value |= MASTER_ENABLE | LINE_WAKEUP_EN;
ao_writel(priv, value, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
mutex_unlock(&padctl->lock);
return 0;
}
static int tegra186_utmi_disable_phy_sleepwalk(struct tegra_xusb_lane *lane)
{
struct tegra_xusb_padctl *padctl = lane->pad->padctl;
struct tegra186_xusb_padctl *priv = to_tegra186_xusb_padctl(padctl);
unsigned int index = lane->index;
u32 value;
mutex_lock(&padctl->lock);
/* disable the wake detection */
value = ao_readl(priv, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
value &= ~(MASTER_ENABLE | LINE_WAKEUP_EN);
ao_writel(priv, value, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
/* switch the electric control of the USB2.0 pad to XUSB vcore logic */
value = ao_readl(priv, XUSB_AO_UTMIP_PAD_CFG(index));
value &= ~(FSLS_USE_XUSB_AO | TRK_CTRL_USE_XUSB_AO | RPD_CTRL_USE_XUSB_AO |
RPU_USE_XUSB_AO | VREG_USE_XUSB_AO);
ao_writel(priv, value, XUSB_AO_UTMIP_PAD_CFG(index));
/* disable wake event triggers of sleepwalk logic */
value = ao_readl(priv, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
value &= ~WAKE_VAL(~0);
value |= WAKE_VAL_NONE;
ao_writel(priv, value, XUSB_AO_UTMIP_SLEEPWALK_CFG(index));
/* power down the line state detectors of the port */
value = ao_readl(priv, XUSB_AO_UTMIP_PAD_CFG(index));
value |= USBOP_VAL_PD | USBON_VAL_PD;
ao_writel(priv, value, XUSB_AO_UTMIP_PAD_CFG(index));
/* clear alarm of the sleepwalk logic */
value = ao_readl(priv, XUSB_AO_UTMIP_TRIGGERS(index));
value |= CLR_WAKE_ALARM;
ao_writel(priv, value, XUSB_AO_UTMIP_TRIGGERS(index));
mutex_unlock(&padctl->lock);
return 0;
}
static int tegra186_utmi_enable_phy_wake(struct tegra_xusb_lane *lane)
{
struct tegra_xusb_padctl *padctl = lane->pad->padctl;
unsigned int index = lane->index;
u32 value;
mutex_lock(&padctl->lock);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value &= ~ALL_WAKE_EVENTS;
value |= USB2_PORT_WAKEUP_EVENT(index);
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
usleep_range(10, 20);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value &= ~ALL_WAKE_EVENTS;
value |= USB2_PORT_WAKE_INTERRUPT_ENABLE(index);
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
mutex_unlock(&padctl->lock);
return 0;
}
static int tegra186_utmi_disable_phy_wake(struct tegra_xusb_lane *lane)
{
struct tegra_xusb_padctl *padctl = lane->pad->padctl;
unsigned int index = lane->index;
u32 value;
mutex_lock(&padctl->lock);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value &= ~ALL_WAKE_EVENTS;
value &= ~USB2_PORT_WAKE_INTERRUPT_ENABLE(index);
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
usleep_range(10, 20);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value &= ~ALL_WAKE_EVENTS;
value |= USB2_PORT_WAKEUP_EVENT(index);
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
mutex_unlock(&padctl->lock);
return 0;
}
static bool tegra186_utmi_phy_remote_wake_detected(struct tegra_xusb_lane *lane)
{
struct tegra_xusb_padctl *padctl = lane->pad->padctl;
unsigned int index = lane->index;
u32 value;
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
if ((value & USB2_PORT_WAKE_INTERRUPT_ENABLE(index)) &&
(value & USB2_PORT_WAKEUP_EVENT(index)))
return true;
return false;
}
static const struct tegra_xusb_lane_ops tegra186_usb2_lane_ops = {
.probe = tegra186_usb2_lane_probe,
.remove = tegra186_usb2_lane_remove,
.enable_phy_sleepwalk = tegra186_utmi_enable_phy_sleepwalk,
.disable_phy_sleepwalk = tegra186_utmi_disable_phy_sleepwalk,
.enable_phy_wake = tegra186_utmi_enable_phy_wake,
.disable_phy_wake = tegra186_utmi_disable_phy_wake,
.remote_wake_detected = tegra186_utmi_phy_remote_wake_detected,
};
static void tegra186_utmi_bias_pad_power_on(struct tegra_xusb_padctl *padctl)
@ -656,10 +1043,128 @@ static void tegra186_usb3_lane_remove(struct tegra_xusb_lane *lane)
kfree(usb3);
}
static int tegra186_usb3_enable_phy_sleepwalk(struct tegra_xusb_lane *lane,
enum usb_device_speed speed)
{
struct tegra_xusb_padctl *padctl = lane->pad->padctl;
unsigned int index = lane->index;
u32 value;
mutex_lock(&padctl->lock);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_1);
value |= SSPX_ELPG_CLAMP_EN_EARLY(index);
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_1);
usleep_range(100, 200);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_1);
value |= SSPX_ELPG_CLAMP_EN(index);
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_1);
usleep_range(250, 350);
mutex_unlock(&padctl->lock);
return 0;
}
static int tegra186_usb3_disable_phy_sleepwalk(struct tegra_xusb_lane *lane)
{
struct tegra_xusb_padctl *padctl = lane->pad->padctl;
unsigned int index = lane->index;
u32 value;
mutex_lock(&padctl->lock);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_1);
value &= ~SSPX_ELPG_CLAMP_EN_EARLY(index);
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_1);
usleep_range(100, 200);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_1);
value &= ~SSPX_ELPG_CLAMP_EN(index);
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_1);
mutex_unlock(&padctl->lock);
return 0;
}
static int tegra186_usb3_enable_phy_wake(struct tegra_xusb_lane *lane)
{
struct tegra_xusb_padctl *padctl = lane->pad->padctl;
unsigned int index = lane->index;
u32 value;
mutex_lock(&padctl->lock);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value &= ~ALL_WAKE_EVENTS;
value |= SS_PORT_WAKEUP_EVENT(index);
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
usleep_range(10, 20);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value &= ~ALL_WAKE_EVENTS;
value |= SS_PORT_WAKE_INTERRUPT_ENABLE(index);
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
mutex_unlock(&padctl->lock);
return 0;
}
static int tegra186_usb3_disable_phy_wake(struct tegra_xusb_lane *lane)
{
struct tegra_xusb_padctl *padctl = lane->pad->padctl;
unsigned int index = lane->index;
u32 value;
mutex_lock(&padctl->lock);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value &= ~ALL_WAKE_EVENTS;
value &= ~SS_PORT_WAKE_INTERRUPT_ENABLE(index);
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
usleep_range(10, 20);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value &= ~ALL_WAKE_EVENTS;
value |= SS_PORT_WAKEUP_EVENT(index);
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
mutex_unlock(&padctl->lock);
return 0;
}
static bool tegra186_usb3_phy_remote_wake_detected(struct tegra_xusb_lane *lane)
{
struct tegra_xusb_padctl *padctl = lane->pad->padctl;
unsigned int index = lane->index;
u32 value;
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
if ((value & SS_PORT_WAKE_INTERRUPT_ENABLE(index)) && (value & SS_PORT_WAKEUP_EVENT(index)))
return true;
return false;
}
static const struct tegra_xusb_lane_ops tegra186_usb3_lane_ops = {
.probe = tegra186_usb3_lane_probe,
.remove = tegra186_usb3_lane_remove,
.enable_phy_sleepwalk = tegra186_usb3_enable_phy_sleepwalk,
.disable_phy_sleepwalk = tegra186_usb3_disable_phy_sleepwalk,
.enable_phy_wake = tegra186_usb3_enable_phy_wake,
.disable_phy_wake = tegra186_usb3_disable_phy_wake,
.remote_wake_detected = tegra186_usb3_phy_remote_wake_detected,
};
static int tegra186_usb3_port_enable(struct tegra_xusb_port *port)
{
return 0;
@ -913,7 +1418,9 @@ static struct tegra_xusb_padctl *
tegra186_xusb_padctl_probe(struct device *dev,
const struct tegra_xusb_padctl_soc *soc)
{
struct platform_device *pdev = to_platform_device(dev);
struct tegra186_xusb_padctl *priv;
struct resource *res;
int err;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
@ -923,6 +1430,11 @@ tegra186_xusb_padctl_probe(struct device *dev,
priv->base.dev = dev;
priv->base.soc = soc;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ao");
priv->ao_regs = devm_ioremap_resource(dev, res);
if (IS_ERR(priv->ao_regs))
return ERR_CAST(priv->ao_regs);
err = tegra186_xusb_read_fuse_calibration(priv);
if (err < 0)
return ERR_PTR(err);
@ -930,6 +1442,40 @@ tegra186_xusb_padctl_probe(struct device *dev,
return &priv->base;
}
static void tegra186_xusb_padctl_save(struct tegra_xusb_padctl *padctl)
{
struct tegra186_xusb_padctl *priv = to_tegra186_xusb_padctl(padctl);
priv->context.vbus_id = padctl_readl(padctl, USB2_VBUS_ID);
priv->context.usb2_pad_mux = padctl_readl(padctl, XUSB_PADCTL_USB2_PAD_MUX);
priv->context.usb2_port_cap = padctl_readl(padctl, XUSB_PADCTL_USB2_PORT_CAP);
priv->context.ss_port_cap = padctl_readl(padctl, XUSB_PADCTL_SS_PORT_CAP);
}
static void tegra186_xusb_padctl_restore(struct tegra_xusb_padctl *padctl)
{
struct tegra186_xusb_padctl *priv = to_tegra186_xusb_padctl(padctl);
padctl_writel(padctl, priv->context.usb2_pad_mux, XUSB_PADCTL_USB2_PAD_MUX);
padctl_writel(padctl, priv->context.usb2_port_cap, XUSB_PADCTL_USB2_PORT_CAP);
padctl_writel(padctl, priv->context.ss_port_cap, XUSB_PADCTL_SS_PORT_CAP);
padctl_writel(padctl, priv->context.vbus_id, USB2_VBUS_ID);
}
static int tegra186_xusb_padctl_suspend_noirq(struct tegra_xusb_padctl *padctl)
{
tegra186_xusb_padctl_save(padctl);
return 0;
}
static int tegra186_xusb_padctl_resume_noirq(struct tegra_xusb_padctl *padctl)
{
tegra186_xusb_padctl_restore(padctl);
return 0;
}
static void tegra186_xusb_padctl_remove(struct tegra_xusb_padctl *padctl)
{
}
@ -937,6 +1483,8 @@ static void tegra186_xusb_padctl_remove(struct tegra_xusb_padctl *padctl)
static const struct tegra_xusb_padctl_ops tegra186_xusb_padctl_ops = {
.probe = tegra186_xusb_padctl_probe,
.remove = tegra186_xusb_padctl_remove,
.suspend_noirq = tegra186_xusb_padctl_suspend_noirq,
.resume_noirq = tegra186_xusb_padctl_resume_noirq,
.vbus_override = tegra186_xusb_padctl_vbus_override,
};

1533
drivers/phy/tegra/xusb-tegra210.c
View file

File diff suppressed because it is too large Load diff

92
drivers/phy/tegra/xusb.c
View file

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2014-2016, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2014-2020, NVIDIA CORPORATION. All rights reserved.
*/
#include <linux/delay.h>
@ -321,11 +321,17 @@ static void tegra_xusb_lane_program(struct tegra_xusb_lane *lane)
if (soc->num_funcs < 2)
return;
if (lane->pad->ops->iddq_enable)
lane->pad->ops->iddq_enable(lane);
/* choose function */
value = padctl_readl(padctl, soc->offset);
value &= ~(soc->mask << soc->shift);
value |= lane->function << soc->shift;
padctl_writel(padctl, value, soc->offset);
if (lane->pad->ops->iddq_disable)
lane->pad->ops->iddq_disable(lane);
}
static void tegra_xusb_pad_program(struct tegra_xusb_pad *pad)
@ -376,7 +382,7 @@ static int tegra_xusb_setup_pads(struct tegra_xusb_padctl *padctl)
return 0;
}
static bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane,
bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane,
const char *function)
{
const char *func = lane->soc->funcs[lane->function];
@ -1267,10 +1273,36 @@ static int tegra_xusb_padctl_remove(struct platform_device *pdev)
return err;
}
static int tegra_xusb_padctl_suspend_noirq(struct device *dev)
{
struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev);
if (padctl->soc && padctl->soc->ops && padctl->soc->ops->suspend_noirq)
return padctl->soc->ops->suspend_noirq(padctl);
return 0;
}
static int tegra_xusb_padctl_resume_noirq(struct device *dev)
{
struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev);
if (padctl->soc && padctl->soc->ops && padctl->soc->ops->resume_noirq)
return padctl->soc->ops->resume_noirq(padctl);
return 0;
}
static const struct dev_pm_ops tegra_xusb_padctl_pm_ops = {
SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(tegra_xusb_padctl_suspend_noirq,
tegra_xusb_padctl_resume_noirq)
};
static struct platform_driver tegra_xusb_padctl_driver = {
.driver = {
.name = "tegra-xusb-padctl",
.of_match_table = tegra_xusb_padctl_of_match,
.pm = &tegra_xusb_padctl_pm_ops,
},
.probe = tegra_xusb_padctl_probe,
.remove = tegra_xusb_padctl_remove,
@ -1337,6 +1369,62 @@ int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl,
}
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_hsic_set_idle);
int tegra_xusb_padctl_enable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy,
enum usb_device_speed speed)
{
struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
if (lane->pad->ops->enable_phy_sleepwalk)
return lane->pad->ops->enable_phy_sleepwalk(lane, speed);
return -EOPNOTSUPP;
}
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_sleepwalk);
int tegra_xusb_padctl_disable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy)
{
struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
if (lane->pad->ops->disable_phy_sleepwalk)
return lane->pad->ops->disable_phy_sleepwalk(lane);
return -EOPNOTSUPP;
}
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_sleepwalk);
int tegra_xusb_padctl_enable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy)
{
struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
if (lane->pad->ops->enable_phy_wake)
return lane->pad->ops->enable_phy_wake(lane);
return -EOPNOTSUPP;
}
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_enable_phy_wake);
int tegra_xusb_padctl_disable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy)
{
struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
if (lane->pad->ops->disable_phy_wake)
return lane->pad->ops->disable_phy_wake(lane);
return -EOPNOTSUPP;
}
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_disable_phy_wake);
bool tegra_xusb_padctl_remote_wake_detected(struct tegra_xusb_padctl *padctl, struct phy *phy)
{
struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
if (lane->pad->ops->remote_wake_detected)
return lane->pad->ops->remote_wake_detected(lane);
return false;
}
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_remote_wake_detected);
int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl,
unsigned int port, bool enable)
{

22
drivers/phy/tegra/xusb.h
View file

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2014-2015, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2014-2020, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2015, Google Inc.
*/
@ -11,6 +11,7 @@
#include <linux/mutex.h>
#include <linux/workqueue.h>
#include <linux/usb/ch9.h>
#include <linux/usb/otg.h>
#include <linux/usb/role.h>
@ -35,6 +36,10 @@ struct tegra_xusb_lane_soc {
const char * const *funcs;
unsigned int num_funcs;
struct {
unsigned int misc_ctl2;
} regs;
};
struct tegra_xusb_lane {
@ -126,8 +131,17 @@ struct tegra_xusb_lane_ops {
struct device_node *np,
unsigned int index);
void (*remove)(struct tegra_xusb_lane *lane);
void (*iddq_enable)(struct tegra_xusb_lane *lane);
void (*iddq_disable)(struct tegra_xusb_lane *lane);
int (*enable_phy_sleepwalk)(struct tegra_xusb_lane *lane, enum usb_device_speed speed);
int (*disable_phy_sleepwalk)(struct tegra_xusb_lane *lane);
int (*enable_phy_wake)(struct tegra_xusb_lane *lane);
int (*disable_phy_wake)(struct tegra_xusb_lane *lane);
bool (*remote_wake_detected)(struct tegra_xusb_lane *lane);
};
bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane, const char *function);
/*
* pads
*/
@ -230,7 +244,7 @@ struct tegra_xusb_pcie_pad {
struct reset_control *rst;
struct clk *pll;
unsigned int enable;
bool enable;
};
static inline struct tegra_xusb_pcie_pad *
@ -245,7 +259,7 @@ struct tegra_xusb_sata_pad {
struct reset_control *rst;
struct clk *pll;
unsigned int enable;
bool enable;
};
static inline struct tegra_xusb_sata_pad *
@ -388,6 +402,8 @@ struct tegra_xusb_padctl_ops {
const struct tegra_xusb_padctl_soc *soc);
void (*remove)(struct tegra_xusb_padctl *padctl);
int (*suspend_noirq)(struct tegra_xusb_padctl *padctl);
int (*resume_noirq)(struct tegra_xusb_padctl *padctl);
int (*usb3_save_context)(struct tegra_xusb_padctl *padctl,
unsigned int index);
int (*hsic_set_idle)(struct tegra_xusb_padctl *padctl,

613
drivers/usb/host/xhci-tegra.c
View file

@ -2,7 +2,7 @@
/*
* NVIDIA Tegra xHCI host controller driver
*
* Copyright (C) 2014 NVIDIA Corporation
* Copyright (c) 2014-2020, NVIDIA CORPORATION. All rights reserved.
* Copyright (C) 2014 Google, Inc.
*/
@ -15,9 +15,11 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/phy/phy.h>
#include <linux/phy/tegra/xusb.h>
#include <linux/platform_device.h>
#include <linux/usb/ch9.h>
#include <linux/pm.h>
#include <linux/pm_domain.h>
#include <linux/pm_runtime.h>
@ -224,6 +226,7 @@ struct tegra_xusb {
int xhci_irq;
int mbox_irq;
int padctl_irq;
void __iomem *ipfs_base;
void __iomem *fpci_base;
@ -249,8 +252,7 @@ struct tegra_xusb {
struct device *genpd_dev_host;
struct device *genpd_dev_ss;
struct device_link *genpd_dl_host;
struct device_link *genpd_dl_ss;
bool use_genpd;
struct phy **phys;
unsigned int num_phys;
@ -270,6 +272,7 @@ struct tegra_xusb {
dma_addr_t phys;
} fw;
bool suspended;
struct tegra_xusb_context context;
};
@ -666,6 +669,9 @@ static irqreturn_t tegra_xusb_mbox_thread(int irq, void *data)
mutex_lock(&tegra->lock);
if (pm_runtime_suspended(tegra->dev) || tegra->suspended)
goto out;
value = fpci_readl(tegra, tegra->soc->mbox.data_out);
tegra_xusb_mbox_unpack(&msg, value);
@ -679,6 +685,7 @@ static irqreturn_t tegra_xusb_mbox_thread(int irq, void *data)
tegra_xusb_mbox_handle(tegra, &msg);
out:
mutex_unlock(&tegra->lock);
return IRQ_HANDLED;
}
@ -819,40 +826,6 @@ static void tegra_xusb_phy_disable(struct tegra_xusb *tegra)
}
}
static int tegra_xusb_runtime_suspend(struct device *dev)
{
struct tegra_xusb *tegra = dev_get_drvdata(dev);
regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
tegra_xusb_clk_disable(tegra);
return 0;
}
static int tegra_xusb_runtime_resume(struct device *dev)
{
struct tegra_xusb *tegra = dev_get_drvdata(dev);
int err;
err = tegra_xusb_clk_enable(tegra);
if (err) {
dev_err(dev, "failed to enable clocks: %d\n", err);
return err;
}
err = regulator_bulk_enable(tegra->soc->num_supplies, tegra->supplies);
if (err) {
dev_err(dev, "failed to enable regulators: %d\n", err);
goto disable_clk;
}
return 0;
disable_clk:
tegra_xusb_clk_disable(tegra);
return err;
}
#ifdef CONFIG_PM_SLEEP
static int tegra_xusb_init_context(struct tegra_xusb *tegra)
{
@ -1026,10 +999,9 @@ static int tegra_xusb_load_firmware(struct tegra_xusb *tegra)
static void tegra_xusb_powerdomain_remove(struct device *dev,
struct tegra_xusb *tegra)
{
if (tegra->genpd_dl_ss)
device_link_del(tegra->genpd_dl_ss);
if (tegra->genpd_dl_host)
device_link_del(tegra->genpd_dl_host);
if (!tegra->use_genpd)
return;
if (!IS_ERR_OR_NULL(tegra->genpd_dev_ss))
dev_pm_domain_detach(tegra->genpd_dev_ss, true);
if (!IS_ERR_OR_NULL(tegra->genpd_dev_host))
@ -1055,20 +1027,84 @@ static int tegra_xusb_powerdomain_init(struct device *dev,
return err;
}
tegra->genpd_dl_host = device_link_add(dev, tegra->genpd_dev_host,
DL_FLAG_PM_RUNTIME |
DL_FLAG_STATELESS);
if (!tegra->genpd_dl_host) {
dev_err(dev, "adding host device link failed!\n");
return -ENODEV;
tegra->use_genpd = true;
return 0;
}
static int tegra_xusb_unpowergate_partitions(struct tegra_xusb *tegra)
{
struct device *dev = tegra->dev;
int rc;
if (tegra->use_genpd) {
rc = pm_runtime_get_sync(tegra->genpd_dev_ss);
if (rc < 0) {
dev_err(dev, "failed to enable XUSB SS partition\n");
return rc;
}
rc = pm_runtime_get_sync(tegra->genpd_dev_host);
if (rc < 0) {
dev_err(dev, "failed to enable XUSB Host partition\n");
pm_runtime_put_sync(tegra->genpd_dev_ss);
return rc;
}
} else {
rc = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBA,
tegra->ss_clk,
tegra->ss_rst);
if (rc < 0) {
dev_err(dev, "failed to enable XUSB SS partition\n");
return rc;
}
rc = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBC,
tegra->host_clk,
tegra->host_rst);
if (rc < 0) {
dev_err(dev, "failed to enable XUSB Host partition\n");
tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA);
return rc;
}
}
tegra->genpd_dl_ss = device_link_add(dev, tegra->genpd_dev_ss,
DL_FLAG_PM_RUNTIME |
DL_FLAG_STATELESS);
if (!tegra->genpd_dl_ss) {
dev_err(dev, "adding superspeed device link failed!\n");
return -ENODEV;
return 0;
}
static int tegra_xusb_powergate_partitions(struct tegra_xusb *tegra)
{
struct device *dev = tegra->dev;
int rc;
if (tegra->use_genpd) {
rc = pm_runtime_put_sync(tegra->genpd_dev_host);
if (rc < 0) {
dev_err(dev, "failed to disable XUSB Host partition\n");
return rc;
}
rc = pm_runtime_put_sync(tegra->genpd_dev_ss);
if (rc < 0) {
dev_err(dev, "failed to disable XUSB SS partition\n");
pm_runtime_get_sync(tegra->genpd_dev_host);
return rc;
}
} else {
rc = tegra_powergate_power_off(TEGRA_POWERGATE_XUSBC);
if (rc < 0) {
dev_err(dev, "failed to disable XUSB Host partition\n");
return rc;
}
rc = tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA);
if (rc < 0) {
dev_err(dev, "failed to disable XUSB SS partition\n");
tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBC,
tegra->host_clk,
tegra->host_rst);
return rc;
}
}
return 0;
@ -1090,6 +1126,24 @@ static int __tegra_xusb_enable_firmware_messages(struct tegra_xusb *tegra)
return err;
}
static irqreturn_t tegra_xusb_padctl_irq(int irq, void *data)
{
struct tegra_xusb *tegra = data;
mutex_lock(&tegra->lock);
if (tegra->suspended) {
mutex_unlock(&tegra->lock);
return IRQ_HANDLED;
}
mutex_unlock(&tegra->lock);
pm_runtime_resume(tegra->dev);
return IRQ_HANDLED;
}
static int tegra_xusb_enable_firmware_messages(struct tegra_xusb *tegra)
{
int err;
@ -1213,6 +1267,52 @@ static void tegra_xhci_id_work(struct work_struct *work)
}
}
#if IS_ENABLED(CONFIG_PM) || IS_ENABLED(CONFIG_PM_SLEEP)
static bool is_usb2_otg_phy(struct tegra_xusb *tegra, unsigned int index)
{
return (tegra->usbphy[index] != NULL);
}
static bool is_usb3_otg_phy(struct tegra_xusb *tegra, unsigned int index)
{
struct tegra_xusb_padctl *padctl = tegra->padctl;
unsigned int i;
int port;
for (i = 0; i < tegra->num_usb_phys; i++) {
if (is_usb2_otg_phy(tegra, i)) {
port = tegra_xusb_padctl_get_usb3_companion(padctl, i);
if ((port >= 0) && (index == (unsigned int)port))
return true;
}
}
return false;
}
static bool is_host_mode_phy(struct tegra_xusb *tegra, unsigned int phy_type, unsigned int index)
{
if (strcmp(tegra->soc->phy_types[phy_type].name, "hsic") == 0)
return true;
if (strcmp(tegra->soc->phy_types[phy_type].name, "usb2") == 0) {
if (is_usb2_otg_phy(tegra, index))
return ((index == tegra->otg_usb2_port) && tegra->host_mode);
else
return true;
}
if (strcmp(tegra->soc->phy_types[phy_type].name, "usb3") == 0) {
if (is_usb3_otg_phy(tegra, index))
return ((index == tegra->otg_usb3_port) && tegra->host_mode);
else
return true;
}
return false;
}
#endif
static int tegra_xusb_get_usb2_port(struct tegra_xusb *tegra,
struct usb_phy *usbphy)
{
@ -1305,6 +1405,7 @@ static void tegra_xusb_deinit_usb_phy(struct tegra_xusb *tegra)
static int tegra_xusb_probe(struct platform_device *pdev)
{
struct tegra_xusb *tegra;
struct device_node *np;
struct resource *regs;
struct xhci_hcd *xhci;
unsigned int i, j, k;
@ -1352,6 +1453,14 @@ static int tegra_xusb_probe(struct platform_device *pdev)
if (IS_ERR(tegra->padctl))
return PTR_ERR(tegra->padctl);
np = of_parse_phandle(pdev->dev.of_node, "nvidia,xusb-padctl", 0);
if (!np)
return -ENODEV;
tegra->padctl_irq = of_irq_get(np, 0);
if (tegra->padctl_irq <= 0)
return (tegra->padctl_irq == 0) ? -ENODEV : tegra->padctl_irq;
tegra->host_clk = devm_clk_get(&pdev->dev, "xusb_host");
if (IS_ERR(tegra->host_clk)) {
err = PTR_ERR(tegra->host_clk);
@ -1432,25 +1541,6 @@ static int tegra_xusb_probe(struct platform_device *pdev)
err);
goto put_padctl;
}
err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBA,
tegra->ss_clk,
tegra->ss_rst);
if (err) {
dev_err(&pdev->dev,
"failed to enable XUSBA domain: %d\n", err);
goto put_padctl;
}
err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_XUSBC,
tegra->host_clk,
tegra->host_rst);
if (err) {
tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA);
dev_err(&pdev->dev,
"failed to enable XUSBC domain: %d\n", err);
goto put_padctl;
}
} else {
err = tegra_xusb_powerdomain_init(&pdev->dev, tegra);
if (err)
@ -1515,6 +1605,7 @@ static int tegra_xusb_probe(struct platform_device *pdev)
goto put_powerdomains;
}
tegra->hcd->skip_phy_initialization = 1;
tegra->hcd->regs = tegra->regs;
tegra->hcd->rsrc_start = regs->start;
tegra->hcd->rsrc_len = resource_size(regs);
@ -1525,10 +1616,22 @@ static int tegra_xusb_probe(struct platform_device *pdev)
*/
platform_set_drvdata(pdev, tegra);
err = tegra_xusb_clk_enable(tegra);
if (err) {
dev_err(tegra->dev, "failed to enable clocks: %d\n", err);
goto put_hcd;
}
err = regulator_bulk_enable(tegra->soc->num_supplies, tegra->supplies);
if (err) {
dev_err(tegra->dev, "failed to enable regulators: %d\n", err);
goto disable_clk;
}
err = tegra_xusb_phy_enable(tegra);
if (err < 0) {
dev_err(&pdev->dev, "failed to enable PHYs: %d\n", err);
goto put_hcd;
goto disable_regulator;
}
/*
@ -1547,30 +1650,22 @@ static int tegra_xusb_probe(struct platform_device *pdev)
goto disable_phy;
}
pm_runtime_enable(&pdev->dev);
if (!pm_runtime_enabled(&pdev->dev))
err = tegra_xusb_runtime_resume(&pdev->dev);
else
err = pm_runtime_get_sync(&pdev->dev);
if (err < 0) {
dev_err(&pdev->dev, "failed to enable device: %d\n", err);
err = tegra_xusb_unpowergate_partitions(tegra);
if (err)
goto free_firmware;
}
tegra_xusb_config(tegra);
err = tegra_xusb_load_firmware(tegra);
if (err < 0) {
dev_err(&pdev->dev, "failed to load firmware: %d\n", err);
goto put_rpm;
goto powergate;
}
err = usb_add_hcd(tegra->hcd, tegra->xhci_irq, IRQF_SHARED);
if (err < 0) {
dev_err(&pdev->dev, "failed to add USB HCD: %d\n", err);
goto put_rpm;
goto powergate;
}
device_wakeup_enable(tegra->hcd->self.controller);
@ -1593,12 +1688,6 @@ static int tegra_xusb_probe(struct platform_device *pdev)
goto put_usb3;
}
err = tegra_xusb_enable_firmware_messages(tegra);
if (err < 0) {
dev_err(&pdev->dev, "failed to enable messages: %d\n", err);
goto remove_usb3;
}
err = devm_request_threaded_irq(&pdev->dev, tegra->mbox_irq,
tegra_xusb_mbox_irq,
tegra_xusb_mbox_thread, 0,
@ -1608,12 +1697,36 @@ static int tegra_xusb_probe(struct platform_device *pdev)
goto remove_usb3;
}
err = devm_request_threaded_irq(&pdev->dev, tegra->padctl_irq, NULL, tegra_xusb_padctl_irq,
IRQF_ONESHOT, dev_name(&pdev->dev), tegra);
if (err < 0) {
dev_err(&pdev->dev, "failed to request padctl IRQ: %d\n", err);
goto remove_usb3;
}
err = tegra_xusb_enable_firmware_messages(tegra);
if (err < 0) {
dev_err(&pdev->dev, "failed to enable messages: %d\n", err);
goto remove_usb3;
}
err = tegra_xusb_init_usb_phy(tegra);
if (err < 0) {
dev_err(&pdev->dev, "failed to init USB PHY: %d\n", err);
goto remove_usb3;
}
/* Enable wake for both USB 2.0 and USB 3.0 roothubs */
device_init_wakeup(&tegra->hcd->self.root_hub->dev, true);
device_init_wakeup(&xhci->shared_hcd->self.root_hub->dev, true);
device_init_wakeup(tegra->dev, true);
pm_runtime_use_autosuspend(tegra->dev);
pm_runtime_set_autosuspend_delay(tegra->dev, 2000);
pm_runtime_mark_last_busy(tegra->dev);
pm_runtime_set_active(tegra->dev);
pm_runtime_enable(tegra->dev);
return 0;
remove_usb3:
@ -1622,24 +1735,21 @@ static int tegra_xusb_probe(struct platform_device *pdev)
usb_put_hcd(xhci->shared_hcd);
remove_usb2:
usb_remove_hcd(tegra->hcd);
put_rpm:
if (!pm_runtime_status_suspended(&pdev->dev))
tegra_xusb_runtime_suspend(&pdev->dev);
put_hcd:
usb_put_hcd(tegra->hcd);
powergate:
tegra_xusb_powergate_partitions(tegra);
free_firmware:
dma_free_coherent(&pdev->dev, tegra->fw.size, tegra->fw.virt,
tegra->fw.phys);
disable_phy:
tegra_xusb_phy_disable(tegra);
pm_runtime_disable(&pdev->dev);
disable_regulator:
regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
disable_clk:
tegra_xusb_clk_disable(tegra);
put_hcd:
usb_put_hcd(tegra->hcd);
put_powerdomains:
if (!of_property_read_bool(pdev->dev.of_node, "power-domains")) {
tegra_powergate_power_off(TEGRA_POWERGATE_XUSBC);
tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA);
} else {
tegra_xusb_powerdomain_remove(&pdev->dev, tegra);
}
tegra_xusb_powerdomain_remove(&pdev->dev, tegra);
put_padctl:
tegra_xusb_padctl_put(tegra->padctl);
return err;
@ -1652,6 +1762,7 @@ static int tegra_xusb_remove(struct platform_device *pdev)
tegra_xusb_deinit_usb_phy(tegra);
pm_runtime_get_sync(&pdev->dev);
usb_remove_hcd(xhci->shared_hcd);
usb_put_hcd(xhci->shared_hcd);
xhci->shared_hcd = NULL;
@ -1661,24 +1772,22 @@ static int tegra_xusb_remove(struct platform_device *pdev)
dma_free_coherent(&pdev->dev, tegra->fw.size, tegra->fw.virt,
tegra->fw.phys);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
pm_runtime_put(&pdev->dev);
if (!of_property_read_bool(pdev->dev.of_node, "power-domains")) {
tegra_powergate_power_off(TEGRA_POWERGATE_XUSBC);
tegra_powergate_power_off(TEGRA_POWERGATE_XUSBA);
} else {
tegra_xusb_powerdomain_remove(&pdev->dev, tegra);
}
tegra_xusb_powergate_partitions(tegra);
tegra_xusb_powerdomain_remove(&pdev->dev, tegra);
tegra_xusb_phy_disable(tegra);
tegra_xusb_clk_disable(tegra);
regulator_bulk_disable(tegra->soc->num_supplies, tegra->supplies);
tegra_xusb_padctl_put(tegra->padctl);
return 0;
}
#ifdef CONFIG_PM_SLEEP
#if IS_ENABLED(CONFIG_PM) || IS_ENABLED(CONFIG_PM_SLEEP)
static bool xhci_hub_ports_suspended(struct xhci_hub *hub)
{
struct device *dev = hub->hcd->self.controller;
@ -1704,9 +1813,17 @@ static bool xhci_hub_ports_suspended(struct xhci_hub *hub)
static int tegra_xusb_check_ports(struct tegra_xusb *tegra)
{
struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
struct xhci_bus_state *bus_state = &xhci->usb2_rhub.bus_state;
unsigned long flags;
int err = 0;
if (bus_state->bus_suspended) {
/* xusb_hub_suspend() has just directed one or more USB2 port(s)
* to U3 state, it takes 3ms to enter U3.
*/
usleep_range(3000, 4000);
}
spin_lock_irqsave(&xhci->lock, flags);
if (!xhci_hub_ports_suspended(&xhci->usb2_rhub) ||
@ -1752,45 +1869,186 @@ static void tegra_xusb_restore_context(struct tegra_xusb *tegra)
}
}
static int tegra_xusb_enter_elpg(struct tegra_xusb *tegra, bool wakeup)
static enum usb_device_speed tegra_xhci_portsc_to_speed(struct tegra_xusb *tegra, u32 portsc)
{
if (DEV_LOWSPEED(portsc))
return USB_SPEED_LOW;
if (DEV_HIGHSPEED(portsc))
return USB_SPEED_HIGH;
if (DEV_FULLSPEED(portsc))
return USB_SPEED_FULL;
if (DEV_SUPERSPEED_ANY(portsc))
return USB_SPEED_SUPER;
return USB_SPEED_UNKNOWN;
}
static void tegra_xhci_enable_phy_sleepwalk_wake(struct tegra_xusb *tegra)
{
struct tegra_xusb_padctl *padctl = tegra->padctl;
struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
enum usb_device_speed speed;
struct phy *phy;
unsigned int index, offset;
unsigned int i, j, k;
struct xhci_hub *rhub;
u32 portsc;
for (i = 0, k = 0; i < tegra->soc->num_types; i++) {
if (strcmp(tegra->soc->phy_types[i].name, "usb3") == 0)
rhub = &xhci->usb3_rhub;
else
rhub = &xhci->usb2_rhub;
if (strcmp(tegra->soc->phy_types[i].name, "hsic") == 0)
offset = tegra->soc->ports.usb2.count;
else
offset = 0;
for (j = 0; j < tegra->soc->phy_types[i].num; j++) {
phy = tegra->phys[k++];
if (!phy)
continue;
index = j + offset;
if (index >= rhub->num_ports)
continue;
if (!is_host_mode_phy(tegra, i, j))
continue;
portsc = readl(rhub->ports[index]->addr);
speed = tegra_xhci_portsc_to_speed(tegra, portsc);
tegra_xusb_padctl_enable_phy_sleepwalk(padctl, phy, speed);
tegra_xusb_padctl_enable_phy_wake(padctl, phy);
}
}
}
static void tegra_xhci_disable_phy_wake(struct tegra_xusb *tegra)
{
struct tegra_xusb_padctl *padctl = tegra->padctl;
unsigned int i;
for (i = 0; i < tegra->num_phys; i++) {
if (!tegra->phys[i])
continue;
tegra_xusb_padctl_disable_phy_wake(padctl, tegra->phys[i]);
}
}
static void tegra_xhci_disable_phy_sleepwalk(struct tegra_xusb *tegra)
{
struct tegra_xusb_padctl *padctl = tegra->padctl;
unsigned int i;
for (i = 0; i < tegra->num_phys; i++) {
if (!tegra->phys[i])
continue;
tegra_xusb_padctl_disable_phy_sleepwalk(padctl, tegra->phys[i]);
}
}
static int tegra_xusb_enter_elpg(struct tegra_xusb *tegra, bool runtime)
{
struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
struct device *dev = tegra->dev;
bool wakeup = runtime ? true : device_may_wakeup(dev);
unsigned int i;
int err;
u32 usbcmd;
dev_dbg(dev, "entering ELPG\n");
usbcmd = readl(&xhci->op_regs->command);
usbcmd &= ~CMD_EIE;
writel(usbcmd, &xhci->op_regs->command);
err = tegra_xusb_check_ports(tegra);
if (err < 0) {
dev_err(tegra->dev, "not all ports suspended: %d\n", err);
return err;
goto out;
}
err = xhci_suspend(xhci, wakeup);
if (err < 0) {
dev_err(tegra->dev, "failed to suspend XHCI: %d\n", err);
return err;
goto out;
}
tegra_xusb_save_context(tegra);
tegra_xusb_phy_disable(tegra);
if (wakeup)
tegra_xhci_enable_phy_sleepwalk_wake(tegra);
tegra_xusb_powergate_partitions(tegra);
for (i = 0; i < tegra->num_phys; i++) {
if (!tegra->phys[i])
continue;
phy_power_off(tegra->phys[i]);
if (!wakeup)
phy_exit(tegra->phys[i]);
}
tegra_xusb_clk_disable(tegra);
return 0;
out:
if (!err)
dev_dbg(tegra->dev, "entering ELPG done\n");
else {
usbcmd = readl(&xhci->op_regs->command);
usbcmd |= CMD_EIE;
writel(usbcmd, &xhci->op_regs->command);
dev_dbg(tegra->dev, "entering ELPG failed\n");
pm_runtime_mark_last_busy(tegra->dev);
}
return err;
}
static int tegra_xusb_exit_elpg(struct tegra_xusb *tegra, bool wakeup)
static int tegra_xusb_exit_elpg(struct tegra_xusb *tegra, bool runtime)
{
struct xhci_hcd *xhci = hcd_to_xhci(tegra->hcd);
struct device *dev = tegra->dev;
bool wakeup = runtime ? true : device_may_wakeup(dev);
unsigned int i;
u32 usbcmd;
int err;
dev_dbg(dev, "exiting ELPG\n");
pm_runtime_mark_last_busy(tegra->dev);
err = tegra_xusb_clk_enable(tegra);
if (err < 0) {
dev_err(tegra->dev, "failed to enable clocks: %d\n", err);
return err;
goto out;
}
err = tegra_xusb_phy_enable(tegra);
if (err < 0) {
dev_err(tegra->dev, "failed to enable PHYs: %d\n", err);
goto disable_clk;
err = tegra_xusb_unpowergate_partitions(tegra);
if (err)
goto disable_clks;
if (wakeup)
tegra_xhci_disable_phy_wake(tegra);
for (i = 0; i < tegra->num_phys; i++) {
if (!tegra->phys[i])
continue;
if (!wakeup)
phy_init(tegra->phys[i]);
phy_power_on(tegra->phys[i]);
}
tegra_xusb_config(tegra);
@ -1808,31 +2066,79 @@ static int tegra_xusb_exit_elpg(struct tegra_xusb *tegra, bool wakeup)
goto disable_phy;
}
err = xhci_resume(xhci, true);
if (wakeup)
tegra_xhci_disable_phy_sleepwalk(tegra);
err = xhci_resume(xhci, 0);
if (err < 0) {
dev_err(tegra->dev, "failed to resume XHCI: %d\n", err);
goto disable_phy;
}
return 0;
usbcmd = readl(&xhci->op_regs->command);
usbcmd |= CMD_EIE;
writel(usbcmd, &xhci->op_regs->command);
goto out;
disable_phy:
tegra_xusb_phy_disable(tegra);
disable_clk:
for (i = 0; i < tegra->num_phys; i++) {
if (!tegra->phys[i])
continue;
phy_power_off(tegra->phys[i]);
if (!wakeup)
phy_exit(tegra->phys[i]);
}
tegra_xusb_powergate_partitions(tegra);
disable_clks:
tegra_xusb_clk_disable(tegra);
out:
if (!err)
dev_dbg(dev, "exiting ELPG done\n");
else
dev_dbg(dev, "exiting ELPG failed\n");
return err;
}
static int tegra_xusb_suspend(struct device *dev)
{
struct tegra_xusb *tegra = dev_get_drvdata(dev);
bool wakeup = device_may_wakeup(dev);
int err;
synchronize_irq(tegra->mbox_irq);
mutex_lock(&tegra->lock);
err = tegra_xusb_enter_elpg(tegra, wakeup);
if (pm_runtime_suspended(dev)) {
err = tegra_xusb_exit_elpg(tegra, true);
if (err < 0)
goto out;
}
err = tegra_xusb_enter_elpg(tegra, false);
if (err < 0) {
if (pm_runtime_suspended(dev)) {
pm_runtime_disable(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
}
goto out;
}
out:
if (!err) {
tegra->suspended = true;
pm_runtime_disable(dev);
if (device_may_wakeup(dev)) {
if (enable_irq_wake(tegra->padctl_irq))
dev_err(dev, "failed to enable padctl wakes\n");
}
}
mutex_unlock(&tegra->lock);
return err;
@ -1841,11 +2147,56 @@ static int tegra_xusb_suspend(struct device *dev)
static int tegra_xusb_resume(struct device *dev)
{
struct tegra_xusb *tegra = dev_get_drvdata(dev);
bool wakeup = device_may_wakeup(dev);
int err;
mutex_lock(&tegra->lock);
err = tegra_xusb_exit_elpg(tegra, wakeup);
if (!tegra->suspended) {
mutex_unlock(&tegra->lock);
return 0;
}
err = tegra_xusb_exit_elpg(tegra, false);
if (err < 0) {
mutex_unlock(&tegra->lock);
return err;
}
if (device_may_wakeup(dev)) {
if (disable_irq_wake(tegra->padctl_irq))
dev_err(dev, "failed to disable padctl wakes\n");
}
tegra->suspended = false;
mutex_unlock(&tegra->lock);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
return 0;
}
#endif
#ifdef CONFIG_PM
static int tegra_xusb_runtime_suspend(struct device *dev)
{
struct tegra_xusb *tegra = dev_get_drvdata(dev);
int ret;
synchronize_irq(tegra->mbox_irq);
mutex_lock(&tegra->lock);
ret = tegra_xusb_enter_elpg(tegra, true);
mutex_unlock(&tegra->lock);
return ret;
}
static int tegra_xusb_runtime_resume(struct device *dev)
{
struct tegra_xusb *tegra = dev_get_drvdata(dev);
int err;
mutex_lock(&tegra->lock);
err = tegra_xusb_exit_elpg(tegra, true);
mutex_unlock(&tegra->lock);
return err;

10
include/linux/phy/tegra/xusb.h
View file

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2016-2020, NVIDIA CORPORATION. All rights reserved.
*/
#ifndef PHY_TEGRA_XUSB_H
@ -8,6 +8,7 @@
struct tegra_xusb_padctl;
struct device;
enum usb_device_speed;
struct tegra_xusb_padctl *tegra_xusb_padctl_get(struct device *dev);
void tegra_xusb_padctl_put(struct tegra_xusb_padctl *padctl);
@ -23,4 +24,11 @@ int tegra_xusb_padctl_set_vbus_override(struct tegra_xusb_padctl *padctl,
int tegra_phy_xusb_utmi_port_reset(struct phy *phy);
int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl,
unsigned int port);
int tegra_xusb_padctl_enable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy,
enum usb_device_speed speed);
int tegra_xusb_padctl_disable_phy_sleepwalk(struct tegra_xusb_padctl *padctl, struct phy *phy);
int tegra_xusb_padctl_enable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy);
int tegra_xusb_padctl_disable_phy_wake(struct tegra_xusb_padctl *padctl, struct phy *phy);
bool tegra_xusb_padctl_remote_wake_detected(struct tegra_xusb_padctl *padctl, struct phy *phy);
#endif /* PHY_TEGRA_XUSB_H */