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Date: Tue, 8 Sep 2020 09:14:49 +0800
From: JC Kuo <jckuo@...dia.com>
To: Thierry Reding <thierry.reding@...il.com>
CC: <gregkh@...uxfoundation.org>, <robh@...nel.org>,
<jonathanh@...dia.com>, <kishon@...com>,
<linux-tegra@...r.kernel.org>, <linux-usb@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
<nkristam@...dia.com>
Subject: Re: [PATCH v2 08/12] phy: tegra: xusb: t210: support wake and
sleepwalk
Hi Thierry,
Thanks for review.
On 8/31/20 8:37 PM, Thierry Reding wrote:
> On Mon, Aug 31, 2020 at 12:40:39PM +0800, JC Kuo wrote:
>> This commit implements Tegra210 XUSB PADCTL wake and sleepwalk
>> routines. Sleepwalk logic is in PMC (always-on) hardware block.
>> PMC driver provides managed access to the sleepwalk registers
>> via regmap framework.
>>
>> Signed-off-by: JC Kuo <jckuo@...dia.com>
>> ---
>> drivers/phy/tegra/xusb-tegra210.c | 1094 ++++++++++++++++++++++++++++-
>> 1 file changed, 1079 insertions(+), 15 deletions(-)
>>
>> diff --git a/drivers/phy/tegra/xusb-tegra210.c b/drivers/phy/tegra/xusb-tegra210.c
>> index fe1ab440424d..1c03f4ec4b59 100644
>> --- a/drivers/phy/tegra/xusb-tegra210.c
>> +++ b/drivers/phy/tegra/xusb-tegra210.c
>> @@ -16,6 +16,8 @@
>> #include <linux/regulator/consumer.h>
>> #include <linux/reset.h>
>> #include <linux/slab.h>
>> +#include <linux/regmap.h>
>> +#include <linux/of_platform.h>
>>
>> #include <soc/tegra/fuse.h>
>>
>> @@ -52,6 +54,20 @@
>> #define XUSB_PADCTL_SS_PORT_MAP_PORTX_MAP(x, v) (((v) & 0x7) << ((x) * 5))
>> #define XUSB_PADCTL_SS_PORT_MAP_PORT_DISABLED 0x7
>>
>> +#define XUSB_PADCTL_ELPG_PROGRAM_0 0x20
>> +#define USB2_PORT_WAKE_INTERRUPT_ENABLE(x) BIT((x))
>> +#define USB2_PORT_WAKEUP_EVENT(x) BIT((x) + 7)
>> +#define SS_PORT_WAKE_INTERRUPT_ENABLE(x) BIT((x) + 14)
>> +#define SS_PORT_WAKEUP_EVENT(x) BIT((x) + 21)
>> +#define USB2_HSIC_PORT_WAKE_INTERRUPT_ENABLE(x) BIT((x) + 28)
>> +#define USB2_HSIC_PORT_WAKEUP_EVENT(x) BIT((x) + 30)
>> +#define ALL_WAKE_EVENTS ( \
>> + USB2_PORT_WAKEUP_EVENT(0) | USB2_PORT_WAKEUP_EVENT(1) | \
>> + USB2_PORT_WAKEUP_EVENT(2) | USB2_PORT_WAKEUP_EVENT(3) | \
>> + SS_PORT_WAKEUP_EVENT(0) | SS_PORT_WAKEUP_EVENT(1) | \
>> + SS_PORT_WAKEUP_EVENT(2) | SS_PORT_WAKEUP_EVENT(3) | \
>> + USB2_HSIC_PORT_WAKEUP_EVENT(0))
>> +
>> #define XUSB_PADCTL_ELPG_PROGRAM1 0x024
>> #define XUSB_PADCTL_ELPG_PROGRAM1_AUX_MUX_LP0_VCORE_DOWN (1 << 31)
>> #define XUSB_PADCTL_ELPG_PROGRAM1_AUX_MUX_LP0_CLAMP_EN_EARLY (1 << 30)
>> @@ -90,6 +106,8 @@
>> #define XUSB_PADCTL_USB2_OTG_PAD_CTL1_PD_DR (1 << 2)
>> #define XUSB_PADCTL_USB2_OTG_PAD_CTL1_PD_DISC_OVRD (1 << 1)
>> #define XUSB_PADCTL_USB2_OTG_PAD_CTL1_PD_CHRP_OVRD (1 << 0)
>> +#define RPD_CTRL(x) (((x) & 0x1f) << 26)
>> +#define RPD_CTRL_VALUE(x) (((x) >> 26) & 0x1f)
>>
>> #define XUSB_PADCTL_USB2_BIAS_PAD_CTL0 0x284
>> #define XUSB_PADCTL_USB2_BIAS_PAD_CTL0_PD (1 << 11)
>> @@ -108,6 +126,8 @@
>> #define XUSB_PADCTL_USB2_BIAS_PAD_CTL1_TRK_START_TIMER_SHIFT 12
>> #define XUSB_PADCTL_USB2_BIAS_PAD_CTL1_TRK_START_TIMER_MASK 0x7f
>> #define XUSB_PADCTL_USB2_BIAS_PAD_CTL1_TRK_START_TIMER_VAL 0x1e
>> +#define TCTRL_VALUE(x) (((x) & 0x3f) >> 0)
>> +#define PCTRL_VALUE(x) (((x) >> 6) & 0x3f)
>>
>> #define XUSB_PADCTL_HSIC_PADX_CTL0(x) (0x300 + (x) * 0x20)
>> #define XUSB_PADCTL_HSIC_PAD_CTL0_RPU_STROBE (1 << 18)
>> @@ -251,16 +271,161 @@
>> #define XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_FLOATING 8
>> #define XUSB_PADCTL_USB2_VBUS_ID_OVERRIDE_GROUNDED 0
>>
>> +/* USB2 SLEEPWALK registers */
>> +#define UTMIP(_port, _offset1, _offset2) \
>> + (((_port) <= 2) ? (_offset1) : (_offset2))
>> +
>> +#define PMC_UTMIP_UHSIC_SLEEP_CFG(x) UTMIP(x, 0x1fc, 0x4d0)
>> +#define UTMIP_MASTER_ENABLE(x) UTMIP(x, BIT(8 * (x)), BIT(0))
>> +#define UTMIP_FSLS_USE_PMC(x) UTMIP(x, BIT(8 * (x) + 1), \
>> + BIT(1))
>> +#define UTMIP_PCTRL_USE_PMC(x) UTMIP(x, BIT(8 * (x) + 2), \
>> + BIT(2))
>> +#define UTMIP_TCTRL_USE_PMC(x) UTMIP(x, BIT(8 * (x) + 3), \
>> + BIT(3))
>> +#define UTMIP_WAKE_VAL(_port, _value) (((_value) & 0xf) << \
>> + (UTMIP(_port, 8 * (_port) + 4, 4)))
>> +#define UTMIP_WAKE_VAL_NONE(_port) UTMIP_WAKE_VAL(_port, 12)
>> +#define UTMIP_WAKE_VAL_ANY(_port) UTMIP_WAKE_VAL(_port, 15)
>> +
>> +#define PMC_UTMIP_UHSIC_SLEEP_CFG1 (0x4d0)
>> +#define UTMIP_RPU_SWITC_LOW_USE_PMC_PX(x) BIT((x) + 8)
>> +#define UTMIP_RPD_CTRL_USE_PMC_PX(x) BIT((x) + 16)
>> +
>> +#define PMC_UTMIP_MASTER_CONFIG (0x274)
>> +#define UTMIP_PWR(x) UTMIP(x, BIT(x), BIT(4))
>> +#define UHSIC_PWR(x) BIT(3)
>> +
>> +#define PMC_USB_DEBOUNCE_DEL (0xec)
>> +#define DEBOUNCE_VAL(x) (((x) & 0xffff) << 0)
>> +#define UTMIP_LINE_DEB_CNT(x) (((x) & 0xf) << 16)
>> +#define UHSIC_LINE_DEB_CNT(x) (((x) & 0xf) << 20)
>> +
>> +#define PMC_UTMIP_UHSIC_FAKE(x) UTMIP(x, 0x218, 0x294)
>> +#define UTMIP_FAKE_USBOP_VAL(x) UTMIP(x, BIT(4 * (x)), BIT(8))
>> +#define UTMIP_FAKE_USBON_VAL(x) UTMIP(x, BIT(4 * (x) + 1), \
>> + BIT(9))
>> +#define UTMIP_FAKE_USBOP_EN(x) UTMIP(x, BIT(4 * (x) + 2), \
>> + BIT(10))
>> +#define UTMIP_FAKE_USBON_EN(x) UTMIP(x, BIT(4 * (x) + 3), \
>> + BIT(11))
>> +
>> +#define PMC_UTMIP_UHSIC_SLEEPWALK_CFG(x) UTMIP(x, 0x200, 0x288)
>> +#define UTMIP_LINEVAL_WALK_EN(x) UTMIP(x, BIT(8 * (x) + 7), \
>> + BIT(15))
>> +
>> +#define PMC_USB_AO (0xf0)
>> +#define USBOP_VAL_PD(x) UTMIP(x, BIT(4 * (x)), BIT(20))
>> +#define USBON_VAL_PD(x) UTMIP(x, BIT(4 * (x) + 1), \
>> + BIT(21))
>> +#define STROBE_VAL_PD(x) BIT(12)
>> +#define DATA0_VAL_PD(x) BIT(13)
>> +#define DATA1_VAL_PD BIT(24)
>> +
>> +#define PMC_UTMIP_UHSIC_SAVED_STATE(x) UTMIP(x, 0x1f0, 0x280)
>> +#define SPEED(_port, _value) (((_value) & 0x3) << \
>> + (UTMIP(_port, 8 * (_port), 8)))
>> +#define UTMI_HS(_port) SPEED(_port, 0)
>> +#define UTMI_FS(_port) SPEED(_port, 1)
>> +#define UTMI_LS(_port) SPEED(_port, 2)
>> +#define UTMI_RST(_port) SPEED(_port, 3)
>> +
>> +#define PMC_UTMIP_UHSIC_TRIGGERS (0x1ec)
>> +#define UTMIP_CLR_WALK_PTR(x) UTMIP(x, BIT(x), BIT(16))
>> +#define UTMIP_CAP_CFG(x) UTMIP(x, BIT((x) + 4), BIT(17))
>> +#define UTMIP_CLR_WAKE_ALARM(x) UTMIP(x, BIT((x) + 12), \
>> + BIT(19))
>> +#define UHSIC_CLR_WALK_PTR BIT(3)
>> +#define UHSIC_CLR_WAKE_ALARM BIT(15)
>> +
>> +#define PMC_UTMIP_SLEEPWALK_PX(x) UTMIP(x, 0x204 + (4 * (x)), \
>> + 0x4e0)
>> +/* phase A */
>> +#define UTMIP_USBOP_RPD_A BIT(0)
>> +#define UTMIP_USBON_RPD_A BIT(1)
>> +#define UTMIP_AP_A BIT(4)
>> +#define UTMIP_AN_A BIT(5)
>> +#define UTMIP_HIGHZ_A BIT(6)
>> +/* phase B */
>> +#define UTMIP_USBOP_RPD_B BIT(8)
>> +#define UTMIP_USBON_RPD_B BIT(9)
>> +#define UTMIP_AP_B BIT(12)
>> +#define UTMIP_AN_B BIT(13)
>> +#define UTMIP_HIGHZ_B BIT(14)
>> +/* phase C */
>> +#define UTMIP_USBOP_RPD_C BIT(16)
>> +#define UTMIP_USBON_RPD_C BIT(17)
>> +#define UTMIP_AP_C BIT(20)
>> +#define UTMIP_AN_C BIT(21)
>> +#define UTMIP_HIGHZ_C BIT(22)
>> +/* phase D */
>> +#define UTMIP_USBOP_RPD_D BIT(24)
>> +#define UTMIP_USBON_RPD_D BIT(25)
>> +#define UTMIP_AP_D BIT(28)
>> +#define UTMIP_AN_D BIT(29)
>> +#define UTMIP_HIGHZ_D BIT(30)
>> +
>> +#define PMC_UTMIP_UHSIC_LINE_WAKEUP (0x26c)
>> +#define UTMIP_LINE_WAKEUP_EN(x) UTMIP(x, BIT(x), BIT(4))
>> +#define UHSIC_LINE_WAKEUP_EN BIT(3)
>> +
>> +#define PMC_UTMIP_TERM_PAD_CFG (0x1f8)
>> +#define PCTRL_VAL(x) (((x) & 0x3f) << 1)
>> +#define TCTRL_VAL(x) (((x) & 0x3f) << 7)
>> +
>> +#define PMC_UTMIP_PAD_CFGX(x) (0x4c0 + (4 * (x)))
>> +#define RPD_CTRL_PX(x) (((x) & 0x1f) << 22)
>> +
>> +#define PMC_UHSIC_SLEEP_CFG PMC_UTMIP_UHSIC_SLEEP_CFG(0)
>> +#define UHSIC_MASTER_ENABLE BIT(24)
>> +#define UHSIC_WAKE_VAL(_value) (((_value) & 0xf) << 28)
>> +#define UHSIC_WAKE_VAL_SD10 UHSIC_WAKE_VAL(2)
>> +#define UHSIC_WAKE_VAL_NONE UHSIC_WAKE_VAL(12)
>> +
>> +#define PMC_UHSIC_FAKE PMC_UTMIP_UHSIC_FAKE(0)
>> +#define UHSIC_FAKE_STROBE_VAL BIT(12)
>> +#define UHSIC_FAKE_DATA_VAL BIT(13)
>> +#define UHSIC_FAKE_STROBE_EN BIT(14)
>> +#define UHSIC_FAKE_DATA_EN BIT(15)
>> +
>> +#define PMC_UHSIC_SAVED_STATE PMC_UTMIP_UHSIC_SAVED_STATE(0)
>> +#define UHSIC_MODE(_value) (((_value) & 0x1) << 24)
>> +#define UHSIC_HS UHSIC_MODE(0)
>> +#define UHSIC_RST UHSIC_MODE(1)
>> +
>> +#define PMC_UHSIC_SLEEPWALK_CFG PMC_UTMIP_UHSIC_SLEEPWALK_CFG(0)
>> +#define UHSIC_WAKE_WALK_EN BIT(30)
>> +#define UHSIC_LINEVAL_WALK_EN BIT(31)
>> +
>> +#define PMC_UHSIC_SLEEPWALK_P0 (0x210)
>> +#define UHSIC_DATA0_RPD_A BIT(1)
>> +#define UHSIC_DATA0_RPU_B BIT(11)
>> +#define UHSIC_DATA0_RPU_C BIT(19)
>> +#define UHSIC_DATA0_RPU_D BIT(27)
>> +#define UHSIC_STROBE_RPU_A BIT(2)
>> +#define UHSIC_STROBE_RPD_B BIT(8)
>> +#define UHSIC_STROBE_RPD_C BIT(16)
>> +#define UHSIC_STROBE_RPD_D BIT(24)
>> +
>> struct tegra210_xusb_fuse_calibration {
>> u32 hs_curr_level[4];
>> u32 hs_term_range_adj;
>> u32 rpd_ctrl;
>> };
>>
>> +struct tegra210_xusb_padctl_context {
>> + u32 usb2_pad_mux;
>> + u32 usb2_port_cap;
>> + u32 ss_port_map;
>> + u32 usb3_pad_mux;
>> +};
>> +
>> struct tegra210_xusb_padctl {
>> struct tegra_xusb_padctl base;
>>
>> struct tegra210_xusb_fuse_calibration fuse;
>> + struct tegra210_xusb_padctl_context context;
>> + struct regmap *pmc_reg;
>
> I'd move this more towards the top because it's a resource that we're
> requesting early on. Also, perhaps just name it "regmap" since "pmc_reg"
> could be mistaken for a "PMC register offset".
>
Yes, I will move and rename.
>> };
>>
>> static inline struct tegra210_xusb_padctl *
>> @@ -886,6 +1051,671 @@ static int tegra210_hsic_set_idle(struct tegra_xusb_padctl *padctl,
>> return 0;
>> }
>>
>> +static int tegra210_usb3_enable_phy_sleepwalk(struct phy *phy)
>> +{
>> + struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
>> + struct tegra_xusb_padctl *padctl = lane->pad->padctl;
>> + int port = tegra210_usb3_lane_map(lane);
>> + struct device *dev = padctl->dev;
>> + u32 value;
>> +
>> + if (port < 0) {
>> + dev_err(dev, "invalid usb3 port number\n");
>> + return -EINVAL;
>> + }
>> +
>> + dev_dbg(dev, "phy enable sleepwalk usb3 %d\n", port);
>> +
>> + mutex_lock(&padctl->lock);
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM1);
>> + value |= XUSB_PADCTL_ELPG_PROGRAM1_SSPX_ELPG_CLAMP_EN_EARLY(port);
>> + padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM1);
>> +
>> + usleep_range(100, 200);
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM1);
>> + value |= XUSB_PADCTL_ELPG_PROGRAM1_SSPX_ELPG_CLAMP_EN(port);
>> + padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM1);
>> +
>> + usleep_range(250, 350);
>> +
>> + mutex_unlock(&padctl->lock);
>> +
>> + return 0;
>> +}
>> +
>> +static int tegra210_usb3_disable_phy_sleepwalk(struct phy *phy)
>> +{
>> + struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
>> + struct tegra_xusb_padctl *padctl = lane->pad->padctl;
>> + int port = tegra210_usb3_lane_map(lane);
>> + struct device *dev = padctl->dev;
>> + u32 value;
>> +
>> + if (port < 0) {
>> + dev_err(dev, "invalid usb3 port number\n");
>> + return -EINVAL;
>> + }
>> +
>> + dev_dbg(dev, "phy disable sleepwalk usb3 %d\n", port);
>> +
>> + mutex_lock(&padctl->lock);
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM1);
>> + value &= ~XUSB_PADCTL_ELPG_PROGRAM1_SSPX_ELPG_CLAMP_EN_EARLY(port);
>> + padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM1);
>> +
>> + usleep_range(100, 200);
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM1);
>> + value &= ~XUSB_PADCTL_ELPG_PROGRAM1_SSPX_ELPG_CLAMP_EN(port);
>> + padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM1);
>> +
>> + mutex_unlock(&padctl->lock);
>> +
>> + return 0;
>> +}
>> +
>> +static int tegra210_usb3_enable_phy_wake(struct phy *phy)
>> +{
>> + struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
>> + struct tegra_xusb_padctl *padctl = lane->pad->padctl;
>> + int port = tegra210_usb3_lane_map(lane);
>> + struct device *dev = padctl->dev;
>> + u32 value;
>> +
>> + if (port < 0) {
>> + dev_err(dev, "invalid usb3 port number\n");
>> + return -EINVAL;
>> + }
>> +
>> + dev_dbg(dev, "phy enable wake usb3 %d\n", port);
>> +
>> + mutex_lock(&padctl->lock);
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_0);
>> + value &= ~ALL_WAKE_EVENTS;
>> + value |= SS_PORT_WAKEUP_EVENT(port);
>> + padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_0);
>> +
>> + usleep_range(10, 20);
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_0);
>> + value &= ~ALL_WAKE_EVENTS;
>> + value |= SS_PORT_WAKE_INTERRUPT_ENABLE(port);
>> + padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_0);
>> +
>> + mutex_unlock(&padctl->lock);
>> +
>> + return 0;
>> +}
>> +
>> +static int tegra210_usb3_disable_phy_wake(struct phy *phy)
>> +{
>> + struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
>> + struct tegra_xusb_padctl *padctl = lane->pad->padctl;
>> + int port = tegra210_usb3_lane_map(lane);
>> + struct device *dev = padctl->dev;
>> + u32 value;
>> +
>> + if (port < 0) {
>> + dev_err(dev, "invalid usb3 port number\n");
>> + return -EINVAL;
>> + }
>> +
>> + dev_dbg(dev, "phy disable wake usb3 %d\n", port);
>> +
>> + mutex_lock(&padctl->lock);
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_0);
>> + value &= ~ALL_WAKE_EVENTS;
>> + value &= ~SS_PORT_WAKE_INTERRUPT_ENABLE(port);
>> + padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_0);
>> +
>> + usleep_range(10, 20);
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_0);
>> + value &= ~ALL_WAKE_EVENTS;
>> + value |= SS_PORT_WAKEUP_EVENT(port);
>> + padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_0);
>> +
>> + mutex_unlock(&padctl->lock);
>> +
>> + return 0;
>> +}
>> +
>> +static int tegra210_utmi_enable_phy_wake(struct phy *phy)
>> +{
>> + struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
>> + struct tegra_xusb_padctl *padctl = lane->pad->padctl;
>> + unsigned int index = lane->index;
>> + struct device *dev = padctl->dev;
>> + u32 value;
>> +
>> + dev_dbg(dev, "phy enable wake on usb2 %d\n", index);
>> +
>> + mutex_lock(&padctl->lock);
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_0);
>> + value &= ~ALL_WAKE_EVENTS;
>> + value |= USB2_PORT_WAKEUP_EVENT(index);
>> + padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_0);
>> +
>> + usleep_range(10, 20);
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_0);
>> + value &= ~ALL_WAKE_EVENTS;
>> + value |= USB2_PORT_WAKE_INTERRUPT_ENABLE(index);
>> + padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_0);
>> +
>> + mutex_unlock(&padctl->lock);
>> +
>> + return 0;
>> +}
>> +
>> +static int tegra210_utmi_disable_phy_wake(struct phy *phy)
>> +{
>> + struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
>> + struct tegra_xusb_padctl *padctl = lane->pad->padctl;
>> + unsigned int index = lane->index;
>> + struct device *dev = padctl->dev;
>> + u32 value;
>> +
>> + dev_dbg(dev, "phy disable wake on usb2 %d\n", index);
>> +
>> + mutex_lock(&padctl->lock);
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_0);
>> + value &= ~ALL_WAKE_EVENTS;
>> + value &= ~USB2_PORT_WAKE_INTERRUPT_ENABLE(index);
>> + padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_0);
>> +
>> + usleep_range(10, 20);
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_0);
>> + value &= ~ALL_WAKE_EVENTS;
>> + value |= USB2_PORT_WAKEUP_EVENT(index);
>> + padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_0);
>> +
>> + mutex_unlock(&padctl->lock);
>> +
>> + return 0;
>> +}
>> +
>> +static int tegra210_hsic_enable_phy_wake(struct phy *phy)
>> +{
>> + struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
>> + struct tegra_xusb_padctl *padctl = lane->pad->padctl;
>> + unsigned int index = lane->index;
>> + struct device *dev = padctl->dev;
>> + u32 value;
>> +
>> + dev_dbg(dev, "phy enable wake on hsic %d\n", index);
>> +
>> + mutex_lock(&padctl->lock);
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_0);
>> + value &= ~ALL_WAKE_EVENTS;
>> + value |= USB2_HSIC_PORT_WAKEUP_EVENT(index);
>> + padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_0);
>> +
>> + usleep_range(10, 20);
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_0);
>> + value &= ~ALL_WAKE_EVENTS;
>> + value |= USB2_HSIC_PORT_WAKE_INTERRUPT_ENABLE(index);
>> + padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_0);
>> +
>> + mutex_unlock(&padctl->lock);
>> +
>> + return 0;
>> +}
>> +
>> +static int tegra210_hsic_disable_phy_wake(struct phy *phy)
>> +{
>> + struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
>> + struct tegra_xusb_padctl *padctl = lane->pad->padctl;
>> + unsigned int index = lane->index;
>> + struct device *dev = padctl->dev;
>> + u32 value;
>> +
>> + dev_dbg(dev, "phy disable wake on hsic %d\n", index);
>> +
>> + mutex_lock(&padctl->lock);
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_0);
>> + value &= ~ALL_WAKE_EVENTS;
>> + value &= ~USB2_HSIC_PORT_WAKE_INTERRUPT_ENABLE(index);
>> + padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_0);
>> +
>> + usleep_range(10, 20);
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_0);
>> + value &= ~ALL_WAKE_EVENTS;
>> + value |= USB2_HSIC_PORT_WAKEUP_EVENT(index);
>> + padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM_0);
>> +
>> + mutex_unlock(&padctl->lock);
>> +
>> + return 0;
>> +}
>> +
>> +static int tegra210_usb3_phy_remote_wake_detected(
>> + struct tegra_xusb_padctl *padctl, int port)
>
> The 80 column limit no longer applies and you can now use up to 100
> columns. There's a couple of other places where you've unnecessarily
> wrapped too early.
>
Got it. Thanks.
>> +{
>> + u32 value;
>> +
>> + if (port < 0) {
>
> Do we need this check here? Since this is a local helper, shouldn't all
> the callers already make sure that they're not passing in invalid
> values?
>
I will remove it.
>> + dev_err(padctl->dev, "invalid usb3 port number %d\n",
>> + port);
>> + return false;
>
> If you want the function to return bool, just make the return type bool
> as well.
>
I will change the return type.
>> + }
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_0);
>> + if ((value & SS_PORT_WAKE_INTERRUPT_ENABLE(port)) &&
>> + (value & SS_PORT_WAKEUP_EVENT(port)))
>> + return true;
>> + else
>> + return false;
>
> The else is not needed here.
>
Got it. Thanks.
>> +}
>> +
>> +static int tegra210_utmi_phy_remote_wake_detected(
>> + struct tegra_xusb_padctl *padctl, int port)
>> +{
>> + u32 value;
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_0);
>> + if ((value & USB2_PORT_WAKE_INTERRUPT_ENABLE(port)) &&
>> + (value & USB2_PORT_WAKEUP_EVENT(port)))
>> + return true;
>> + else
>> + return false;
>> +}
>> +
>> +static int tegra210_hsic_phy_remote_wake_detected(
>> + struct tegra_xusb_padctl *padctl, int port)
>> +{
>> + u32 value;
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM_0);
>> + if ((value & USB2_HSIC_PORT_WAKE_INTERRUPT_ENABLE(port)) &&
>> + (value & USB2_HSIC_PORT_WAKEUP_EVENT(port)))
>> + return true;
>> + else
>> + return false;
>> +}
>
> Perhaps you want to sort these with the USB3, HSIC and UTMI functions
> above rather than sort them by type of function?
>
Yes, I will do accordingly.
>> +
>> +#define padctl_pmc_readl(_priv, _offset) \
>> +({ \
>> + int rc; \
>> + u32 val; \
>
> s/val/value/ here and below.
>
Sure.
>> + rc = regmap_read(_priv->pmc_reg, _offset, &val); \
>> + if (rc) \
>> + return rc; \
>> + val; \
>> +})
>> +
>> +#define padctl_pmc_writel(_priv, _val, _offset) \
>> +do { \
>> + int rc; \
>> + rc = regmap_write(_priv->pmc_reg, _offset, _val); \
>> + if (rc) \
>> + return rc; \
>> +} while (0)
>> +
>> +/* T210 USB2 SLEEPWALK APIs */
>
> Tegra210, please. Although this really shouldn't be needed, since you
> can derive as much from the function names.
>
I will remove it.
>> +int tegra_pmc_utmi_enable_phy_sleepwalk(struct phy *phy,
>> + enum usb_device_speed speed)
>
> Perhaps use tegra210_ as the prefix for consistency?
>
Sure, will do.
>> +{
>> + struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
>> + struct tegra_xusb_padctl *padctl = lane->pad->padctl;
>> + struct tegra210_xusb_padctl *priv = to_tegra210_xusb_padctl(padctl);
>> + struct device *dev = padctl->dev;
>> + unsigned int port = lane->index;
>> + u32 val, tctrl, pctrl, rpd_ctrl;
>
> s/val/value/ here and below.
>
Got it.
>> +
>> + if (speed > USB_SPEED_HIGH)
>> + return -EINVAL;
>> +
>> + dev_dbg(dev, "phy enable sleepwalk usb2 %d speed %d\n", port, speed);
>> +
>> + val = padctl_readl(padctl, XUSB_PADCTL_USB2_BIAS_PAD_CTL1);
>> + tctrl = TCTRL_VALUE(val);
>> + pctrl = PCTRL_VALUE(val);
>> +
>> + val = padctl_readl(padctl, XUSB_PADCTL_USB2_OTG_PADX_CTL1(port));
>> + rpd_ctrl = RPD_CTRL_VALUE(val);
>> +
>> + /* ensure sleepwalk logic is disabled */
>> + val = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_SLEEP_CFG(port));
>> + val &= ~UTMIP_MASTER_ENABLE(port);
>> + padctl_pmc_writel(priv, val, PMC_UTMIP_UHSIC_SLEEP_CFG(port));
>> +
>> + /* ensure sleepwalk logics are in low power mode */
>> + val = padctl_pmc_readl(priv, PMC_UTMIP_MASTER_CONFIG);
>> + val |= UTMIP_PWR(port);
>> + padctl_pmc_writel(priv, val, PMC_UTMIP_MASTER_CONFIG);
>> +
>> + /* set debounce time */
>> + val = padctl_pmc_readl(priv, PMC_USB_DEBOUNCE_DEL);
>> + val &= ~UTMIP_LINE_DEB_CNT(~0);
>> + val |= UTMIP_LINE_DEB_CNT(0x1);
>> + padctl_pmc_writel(priv, val, PMC_USB_DEBOUNCE_DEL);
>> +
>> + /* ensure fake events of sleepwalk logic are desiabled */
>> + val = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_FAKE(port));
>> + val &= ~(UTMIP_FAKE_USBOP_VAL(port) | UTMIP_FAKE_USBON_VAL(port) |
>> + UTMIP_FAKE_USBOP_EN(port) | UTMIP_FAKE_USBON_EN(port));
>> + padctl_pmc_writel(priv, val, PMC_UTMIP_UHSIC_FAKE(port));
>> +
>> + /* ensure wake events of sleepwalk logic are not latched */
>> + val = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_LINE_WAKEUP);
>> + val &= ~UTMIP_LINE_WAKEUP_EN(port);
>> + padctl_pmc_writel(priv, val, PMC_UTMIP_UHSIC_LINE_WAKEUP);
>> +
>> + /* disable wake event triggers of sleepwalk logic */
>> + val = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_SLEEP_CFG(port));
>> + val &= ~UTMIP_WAKE_VAL(port, ~0);
>> + val |= UTMIP_WAKE_VAL_NONE(port);
>> + padctl_pmc_writel(priv, val, PMC_UTMIP_UHSIC_SLEEP_CFG(port));
>> +
>> + /* power down the line state detectors of the pad */
>> + val = padctl_pmc_readl(priv, PMC_USB_AO);
>> + val |= (USBOP_VAL_PD(port) | USBON_VAL_PD(port));
>> + padctl_pmc_writel(priv, val, PMC_USB_AO);
>> +
>> + /* save state per speed */
>> + val = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_SAVED_STATE(port));
>> + val &= ~SPEED(port, ~0);
>> + if (speed == USB_SPEED_HIGH)
>> + val |= UTMI_HS(port);
>> + else if (speed == USB_SPEED_FULL)
>> + val |= UTMI_FS(port);
>> + else if (speed == USB_SPEED_LOW)
>> + val |= UTMI_LS(port);
>> + else
>> + val |= UTMI_RST(port);
>> + padctl_pmc_writel(priv, val, PMC_UTMIP_UHSIC_SAVED_STATE(port));
>> +
>> + /* enable the trigger of the sleepwalk logic */
>> + val = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_SLEEPWALK_CFG(port));
>> + val |= UTMIP_LINEVAL_WALK_EN(port);
>> + padctl_pmc_writel(priv, val, PMC_UTMIP_UHSIC_SLEEPWALK_CFG(port));
>> +
>> + /* reset the walk pointer and clear the alarm of the sleepwalk logic,
>> + * as well as capture the configuration of the USB2.0 pad
>> + */
>> + val = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_TRIGGERS);
>> + val |= (UTMIP_CLR_WALK_PTR(port) | UTMIP_CLR_WAKE_ALARM(port) |
>> + UTMIP_CAP_CFG(port));
>> + padctl_pmc_writel(priv, val, PMC_UTMIP_UHSIC_TRIGGERS);
>> +
>> + /* program electrical parameters read from XUSB PADCTL */
>> + val = padctl_pmc_readl(priv, PMC_UTMIP_TERM_PAD_CFG);
>> + val &= ~(TCTRL_VAL(~0) | PCTRL_VAL(~0));
>> + val |= (TCTRL_VAL(tctrl) | PCTRL_VAL(pctrl));
>> + padctl_pmc_writel(priv, val, PMC_UTMIP_TERM_PAD_CFG);
>> +
>> + val = padctl_pmc_readl(priv, PMC_UTMIP_PAD_CFGX(port));
>> + val &= ~RPD_CTRL_PX(~0);
>> + val |= RPD_CTRL_PX(rpd_ctrl);
>> + padctl_pmc_writel(priv, val, PMC_UTMIP_PAD_CFGX(port));
>> +
>> + /* 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.
>> + */
>> + val = padctl_pmc_readl(priv, PMC_UTMIP_SLEEPWALK_PX(port));
>> + val = (UTMIP_USBOP_RPD_A | UTMIP_USBOP_RPD_B | UTMIP_USBOP_RPD_C |
>> + UTMIP_USBOP_RPD_D);
>> + val |= (UTMIP_USBON_RPD_A | UTMIP_USBON_RPD_B | UTMIP_USBON_RPD_C |
>> + UTMIP_USBON_RPD_D);
>> + if (speed == USB_SPEED_UNKNOWN) {
>> + val |= (UTMIP_HIGHZ_A | UTMIP_HIGHZ_B | UTMIP_HIGHZ_C |
>> + UTMIP_HIGHZ_D);
>> + } else if ((speed == USB_SPEED_HIGH) || (speed == USB_SPEED_FULL)) {
>> + /* J state: D+/D- = high/low, K state: D+/D- = low/high */
>> + val |= UTMIP_HIGHZ_A;
>> + val |= UTMIP_AP_A;
>> + val |= (UTMIP_AN_B | UTMIP_AN_C | UTMIP_AN_D);
>> + } else if (speed == USB_SPEED_LOW) {
>> + /* J state: D+/D- = low/high, K state: D+/D- = high/low */
>> + val |= UTMIP_HIGHZ_A;
>> + val |= UTMIP_AN_A;
>> + val |= (UTMIP_AP_B | UTMIP_AP_C | UTMIP_AP_D);
>> + }
>> + padctl_pmc_writel(priv, val, PMC_UTMIP_SLEEPWALK_PX(port));
>> +
>> + /* power up the line state detectors of the pad */
>> + val = padctl_pmc_readl(priv, PMC_USB_AO);
>> + val &= ~(USBOP_VAL_PD(port) | USBON_VAL_PD(port));
>> + padctl_pmc_writel(priv, val, PMC_USB_AO);
>> +
>> + usleep_range(50, 100);
>> +
>> + /* switch the electric control of the USB2.0 pad to PMC */
>> + val = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_SLEEP_CFG(port));
>> + val |= (UTMIP_FSLS_USE_PMC(port) | UTMIP_PCTRL_USE_PMC(port) |
>> + UTMIP_TCTRL_USE_PMC(port));
>> + padctl_pmc_writel(priv, val, PMC_UTMIP_UHSIC_SLEEP_CFG(port));
>> +
>> + val = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_SLEEP_CFG1);
>> + val |= (UTMIP_RPD_CTRL_USE_PMC_PX(port) |
>> + UTMIP_RPU_SWITC_LOW_USE_PMC_PX(port));
>> + padctl_pmc_writel(priv, val, PMC_UTMIP_UHSIC_SLEEP_CFG1);
>> +
>> + /* set the wake signaling trigger events */
>> + val = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_SLEEP_CFG(port));
>> + val &= ~UTMIP_WAKE_VAL(port, ~0);
>> + val |= UTMIP_WAKE_VAL_ANY(port);
>> + padctl_pmc_writel(priv, val, PMC_UTMIP_UHSIC_SLEEP_CFG(port));
>> +
>> + /* enable the wake detection */
>> + val = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_SLEEP_CFG(port));
>> + val |= UTMIP_MASTER_ENABLE(port);
>> + padctl_pmc_writel(priv, val, PMC_UTMIP_UHSIC_SLEEP_CFG(port));
>> +
>> + val = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_LINE_WAKEUP);
>> + val |= UTMIP_LINE_WAKEUP_EN(port);
>> + padctl_pmc_writel(priv, val, PMC_UTMIP_UHSIC_LINE_WAKEUP);
>> +
>> + return 0;
>> +}
>> +
>> +int tegra_pmc_utmi_disable_phy_sleepwalk(struct phy *phy)
>> +{
>> + struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
>> + struct tegra_xusb_padctl *padctl = lane->pad->padctl;
>> + struct tegra210_xusb_padctl *priv = to_tegra210_xusb_padctl(padctl);
>> + struct device *dev = padctl->dev;
>> + unsigned int port = lane->index;
>> + u32 value;
>> +
>> + dev_dbg(dev, "phy disable sleepwalk usb2 %d\n", port);
>> +
>> + /* disable the wake detection */
>> + value = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_SLEEP_CFG(port));
>> + value &= ~UTMIP_MASTER_ENABLE(port);
>> + padctl_pmc_writel(priv, value, PMC_UTMIP_UHSIC_SLEEP_CFG(port));
>> +
>> + value = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_LINE_WAKEUP);
>> + value &= ~UTMIP_LINE_WAKEUP_EN(port);
>> + padctl_pmc_writel(priv, value, PMC_UTMIP_UHSIC_LINE_WAKEUP);
>> +
>> + /* switch the electric control of the USB2.0 pad to XUSB or USB2 */
>> + value = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_SLEEP_CFG(port));
>> + value &= ~(UTMIP_FSLS_USE_PMC(port) | UTMIP_PCTRL_USE_PMC(port) |
>> + UTMIP_TCTRL_USE_PMC(port));
>> + padctl_pmc_writel(priv, value, PMC_UTMIP_UHSIC_SLEEP_CFG(port));
>> +
>> + value = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_SLEEP_CFG1);
>> + value &= ~(UTMIP_RPD_CTRL_USE_PMC_PX(port) |
>> + UTMIP_RPU_SWITC_LOW_USE_PMC_PX(port));
>> + padctl_pmc_writel(priv, value, PMC_UTMIP_UHSIC_SLEEP_CFG1);
>> +
>> + /* disable wake event triggers of sleepwalk logic */
>> + value = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_SLEEP_CFG(port));
>> + value &= ~UTMIP_WAKE_VAL(port, ~0);
>> + value |= UTMIP_WAKE_VAL_NONE(port);
>> + padctl_pmc_writel(priv, value, PMC_UTMIP_UHSIC_SLEEP_CFG(port));
>> +
>> + /* power down the line state detectors of the port */
>> + value = padctl_pmc_readl(priv, PMC_USB_AO);
>> + value |= (USBOP_VAL_PD(port) | USBON_VAL_PD(port));
>> + padctl_pmc_writel(priv, value, PMC_USB_AO);
>> +
>> + /* clear alarm of the sleepwalk logic */
>> + value = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_TRIGGERS);
>> + value |= UTMIP_CLR_WAKE_ALARM(port);
>> + padctl_pmc_writel(priv, value, PMC_UTMIP_UHSIC_TRIGGERS);
>> +
>> + return 0;
>> +}
>> +
>> +int tegra_pmc_hsic_enable_phy_sleepwalk(struct phy *phy)
>> +{
>> + struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
>> + struct tegra_xusb_padctl *padctl = lane->pad->padctl;
>> + struct tegra210_xusb_padctl *priv = to_tegra210_xusb_padctl(padctl);
>> + struct device *dev = padctl->dev;
>> + unsigned int port = lane->index;
>> + u32 value;
>> +
>> + dev_dbg(dev, "phy enable sleepwalk hsic %d\n", port);
>> +
>> + /* ensure sleepwalk logic is disabled */
>> + value = padctl_pmc_readl(priv, PMC_UHSIC_SLEEP_CFG);
>> + value &= ~UHSIC_MASTER_ENABLE;
>> + padctl_pmc_writel(priv, value, PMC_UHSIC_SLEEP_CFG);
>> +
>> + /* ensure sleepwalk logics are in low power mode */
>> + value = padctl_pmc_readl(priv, PMC_UTMIP_MASTER_CONFIG);
>> + value |= UHSIC_PWR(port);
>> + padctl_pmc_writel(priv, value, PMC_UTMIP_MASTER_CONFIG);
>> +
>> + /* set debounce time */
>> + value = padctl_pmc_readl(priv, PMC_USB_DEBOUNCE_DEL);
>> + value &= ~UHSIC_LINE_DEB_CNT(~0);
>> + value |= UHSIC_LINE_DEB_CNT(0x1);
>> + padctl_pmc_writel(priv, value, PMC_USB_DEBOUNCE_DEL);
>> +
>> + /* ensure fake events of sleepwalk logic are desiabled */
>> + value = padctl_pmc_readl(priv, PMC_UHSIC_FAKE);
>> + value &= ~(UHSIC_FAKE_STROBE_VAL | UHSIC_FAKE_DATA_VAL |
>> + UHSIC_FAKE_STROBE_EN | UHSIC_FAKE_DATA_EN);
>> + padctl_pmc_writel(priv, value, PMC_UHSIC_FAKE);
>> +
>> + /* ensure wake events of sleepwalk logic are not latched */
>> + value = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_LINE_WAKEUP);
>> + value &= ~UHSIC_LINE_WAKEUP_EN;
>> + padctl_pmc_writel(priv, value, PMC_UTMIP_UHSIC_LINE_WAKEUP);
>> +
>> + /* disable wake event triggers of sleepwalk logic */
>> + value = padctl_pmc_readl(priv, PMC_UHSIC_SLEEP_CFG);
>> + value &= ~UHSIC_WAKE_VAL(~0);
>> + value |= UHSIC_WAKE_VAL_NONE;
>> + padctl_pmc_writel(priv, value, PMC_UHSIC_SLEEP_CFG);
>> +
>> + /* power down the line state detectors of the port */
>> + value = padctl_pmc_readl(priv, PMC_USB_AO);
>> + value |= (STROBE_VAL_PD(port) | DATA0_VAL_PD(port) | DATA1_VAL_PD);
>> + padctl_pmc_writel(priv, value, PMC_USB_AO);
>> +
>> + /* save state, HSIC always comes up as HS */
>> + value = padctl_pmc_readl(priv, PMC_UHSIC_SAVED_STATE);
>> + value &= ~UHSIC_MODE(~0);
>> + value |= UHSIC_HS;
>> + padctl_pmc_writel(priv, value, PMC_UHSIC_SAVED_STATE);
>> +
>> + /* enable the trigger of the sleepwalk logic */
>> + value = padctl_pmc_readl(priv, PMC_UHSIC_SLEEPWALK_CFG);
>> + value |= (UHSIC_WAKE_WALK_EN | UHSIC_LINEVAL_WALK_EN);
>> + padctl_pmc_writel(priv, value, PMC_UHSIC_SLEEPWALK_CFG);
>> +
>> + /* reset the walk pointer and clear the alarm of the sleepwalk logic,
>> + * as well as capture the configuration of the USB2.0 port
>> + */
>> + value = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_TRIGGERS);
>> + value |= (UHSIC_CLR_WALK_PTR | UHSIC_CLR_WAKE_ALARM);
>> + padctl_pmc_writel(priv, value, PMC_UTMIP_UHSIC_TRIGGERS);
>> +
>> + /* setup the pull-ups and pull-downs of the signals during the four
>> + * stages of sleepwalk.
>> + * maintain a HSIC IDLE and keep driving HSIC RESUME upon remote wake
>> + */
>> + value = padctl_pmc_readl(priv, PMC_UHSIC_SLEEPWALK_P0);
>> + value = (UHSIC_DATA0_RPD_A | UHSIC_DATA0_RPU_B | UHSIC_DATA0_RPU_C |
>> + UHSIC_DATA0_RPU_D);
>> + value |= (UHSIC_STROBE_RPU_A | UHSIC_STROBE_RPD_B | UHSIC_STROBE_RPD_C |
>> + UHSIC_STROBE_RPD_D);
>> + padctl_pmc_writel(priv, value, PMC_UHSIC_SLEEPWALK_P0);
>> +
>> + /* power up the line state detectors of the port */
>> + value = padctl_pmc_readl(priv, PMC_USB_AO);
>> + value &= ~(STROBE_VAL_PD(port) | DATA0_VAL_PD(port) | DATA1_VAL_PD);
>> + padctl_pmc_writel(priv, value, PMC_USB_AO);
>> +
>> + usleep_range(50, 100);
>> +
>> + /* set the wake signaling trigger events */
>> + value = padctl_pmc_readl(priv, PMC_UHSIC_SLEEP_CFG);
>> + value &= ~UHSIC_WAKE_VAL(~0);
>> + value |= UHSIC_WAKE_VAL_SD10;
>> + padctl_pmc_writel(priv, value, PMC_UHSIC_SLEEP_CFG);
>> +
>> + /* enable the wake detection */
>> + value = padctl_pmc_readl(priv, PMC_UHSIC_SLEEP_CFG);
>> + value |= UHSIC_MASTER_ENABLE;
>> + padctl_pmc_writel(priv, value, PMC_UHSIC_SLEEP_CFG);
>> +
>> + value = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_LINE_WAKEUP);
>> + value |= UHSIC_LINE_WAKEUP_EN;
>> + padctl_pmc_writel(priv, value, PMC_UTMIP_UHSIC_LINE_WAKEUP);
>> +
>> + return 0;
>> +}
>> +
>> +int tegra_pmc_hsic_disable_phy_sleepwalk(struct phy *phy)
>> +{
>> + struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
>> + struct tegra_xusb_padctl *padctl = lane->pad->padctl;
>> + struct tegra210_xusb_padctl *priv = to_tegra210_xusb_padctl(padctl);
>> + struct device *dev = padctl->dev;
>> + unsigned int port = lane->index;
>> + u32 value;
>> +
>> + dev_dbg(dev, "phy disable sleepwalk hsic %d\n", port);
>> +
>> + /* disable the wake detection */
>> + value = padctl_pmc_readl(priv, PMC_UHSIC_SLEEP_CFG);
>> + value &= ~UHSIC_MASTER_ENABLE;
>> + padctl_pmc_writel(priv, value, PMC_UHSIC_SLEEP_CFG);
>> +
>> + value = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_LINE_WAKEUP);
>> + value &= ~UHSIC_LINE_WAKEUP_EN;
>> + padctl_pmc_writel(priv, value, PMC_UTMIP_UHSIC_LINE_WAKEUP);
>> +
>> + /* disable wake event triggers of sleepwalk logic */
>> + value = padctl_pmc_readl(priv, PMC_UHSIC_SLEEP_CFG);
>> + value &= ~UHSIC_WAKE_VAL(~0);
>> + value |= UHSIC_WAKE_VAL_NONE;
>> + padctl_pmc_writel(priv, value, PMC_UHSIC_SLEEP_CFG);
>> +
>> + /* power down the line state detectors of the port */
>> + value = padctl_pmc_readl(priv, PMC_USB_AO);
>> + value |= (STROBE_VAL_PD(port) | DATA0_VAL_PD(port) | DATA1_VAL_PD);
>> + padctl_pmc_writel(priv, value, PMC_USB_AO);
>> +
>> + /* clear alarm of the sleepwalk logic */
>> + value = padctl_pmc_readl(priv, PMC_UTMIP_UHSIC_TRIGGERS);
>> + value |= UHSIC_CLR_WAKE_ALARM;
>> + padctl_pmc_writel(priv, value, PMC_UTMIP_UHSIC_TRIGGERS);
>> +
>> + return 0;
>> +}
>> +
>> static int tegra210_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl,
>> unsigned int index, bool enable)
>> {
>> @@ -988,8 +1818,23 @@ static int tegra210_usb2_phy_init(struct phy *phy)
>> {
>> struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
>> struct tegra_xusb_padctl *padctl = lane->pad->padctl;
>> + unsigned int index = lane->index;
>> + struct tegra_xusb_usb2_port *port;
>> + int err;
>> u32 value;
>>
>> + port = tegra_xusb_find_usb2_port(padctl, index);
>> + if (!port) {
>> + dev_err(&phy->dev, "no port found for USB2 lane %u\n", index);
>> + return -ENODEV;
>> + }
>> +
>> + err = regulator_enable(port->supply);
>> + if (err)
>> + return err;
>> +
>> + mutex_lock(&padctl->lock);
>> +
>> value = padctl_readl(padctl, XUSB_PADCTL_USB2_PAD_MUX);
>> value &= ~(XUSB_PADCTL_USB2_PAD_MUX_USB2_BIAS_PAD_MASK <<
>> XUSB_PADCTL_USB2_PAD_MUX_USB2_BIAS_PAD_SHIFT);
>> @@ -997,11 +1842,29 @@ static int tegra210_usb2_phy_init(struct phy *phy)
>> XUSB_PADCTL_USB2_PAD_MUX_USB2_BIAS_PAD_SHIFT;
>> padctl_writel(padctl, value, XUSB_PADCTL_USB2_PAD_MUX);
>>
>> + mutex_unlock(&padctl->lock);
>> +
>> return 0;
>> }
>
> How is this related to sleepwalk? Should this perhaps be a separate
> patch? Looks like some hunks below are also not immediately related to
> this commit. Or perhaps I don't understand how they are related.
>
I will make it a change. Thanks.
>>
>> static int tegra210_usb2_phy_exit(struct phy *phy)
>> {
>> + struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
>> + struct tegra_xusb_padctl *padctl = lane->pad->padctl;
>> + unsigned int index = lane->index;
>> + struct tegra_xusb_usb2_port *port;
>> + int err;
>> +
>> + port = tegra_xusb_find_usb2_port(padctl, index);
>> + if (!port) {
>> + dev_err(&phy->dev, "no port found for USB2 lane %u\n", index);
>> + return -ENODEV;
>> + }
>> +
>> + err = regulator_disable(port->supply);
>> + if (err)
>> + return err;
>> +
>> return 0;
>> }
>>
>> @@ -1122,6 +1985,8 @@ static int tegra210_usb2_phy_power_on(struct phy *phy)
>>
>> priv = to_tegra210_xusb_padctl(padctl);
>>
>> + mutex_lock(&padctl->lock);
>> +
>> if (port->usb3_port_fake != -1) {
>> value = padctl_readl(padctl, XUSB_PADCTL_SS_PORT_MAP);
>> value &= ~XUSB_PADCTL_SS_PORT_MAP_PORTX_MAP_MASK(
>> @@ -1215,14 +2080,6 @@ static int tegra210_usb2_phy_power_on(struct phy *phy)
>> padctl_writel(padctl, value,
>> XUSB_PADCTL_USB2_BATTERY_CHRG_OTGPADX_CTL1(index));
>>
>> - if (port->supply && port->mode == USB_DR_MODE_HOST) {
>> - err = regulator_enable(port->supply);
>> - if (err)
>> - return err;
>> - }
>> -
>> - mutex_lock(&padctl->lock);
>> -
>> if (pad->enable > 0) {
>> pad->enable++;
>> mutex_unlock(&padctl->lock);
>> @@ -1231,7 +2088,7 @@ static int tegra210_usb2_phy_power_on(struct phy *phy)
>>
>> err = clk_prepare_enable(pad->clk);
>> if (err)
>> - goto disable_regulator;
>> + goto out;
>>
>> value = padctl_readl(padctl, XUSB_PADCTL_USB2_BIAS_PAD_CTL1);
>> value &= ~((XUSB_PADCTL_USB2_BIAS_PAD_CTL1_TRK_START_TIMER_MASK <<
>> @@ -1263,8 +2120,7 @@ static int tegra210_usb2_phy_power_on(struct phy *phy)
>>
>> return 0;
>>
>> -disable_regulator:
>> - regulator_disable(port->supply);
>> +out:
>> mutex_unlock(&padctl->lock);
>> return err;
>> }
>> @@ -1275,12 +2131,12 @@ static int tegra210_usb2_phy_power_off(struct phy *phy)
>> struct tegra_xusb_usb2_pad *pad = to_usb2_pad(lane->pad);
>> struct tegra_xusb_padctl *padctl = lane->pad->padctl;
>> struct tegra_xusb_usb2_port *port;
>> + unsigned int index = lane->index;
>> u32 value;
>>
>> - port = tegra_xusb_find_usb2_port(padctl, lane->index);
>> + port = tegra_xusb_find_usb2_port(padctl, index);
>> if (!port) {
>> - dev_err(&phy->dev, "no port found for USB2 lane %u\n",
>> - lane->index);
>> + dev_err(&phy->dev, "no port found for USB2 lane %u\n", index);
>> return -ENODEV;
>> }
>>
>> @@ -1318,12 +2174,19 @@ static int tegra210_usb2_phy_power_off(struct phy *phy)
>> if (--pad->enable > 0)
>> goto out;
>>
>> + value = padctl_readl(padctl, XUSB_PADCTL_USB2_OTG_PADX_CTL0(index));
>> + value |= XUSB_PADCTL_USB2_OTG_PAD_CTL0_PD;
>> + padctl_writel(padctl, value, XUSB_PADCTL_USB2_OTG_PADX_CTL0(index));
>> +
>> + value = padctl_readl(padctl, XUSB_PADCTL_USB2_OTG_PADX_CTL1(index));
>> + value |= XUSB_PADCTL_USB2_OTG_PAD_CTL1_PD_DR;
>> + padctl_writel(padctl, value, XUSB_PADCTL_USB2_OTG_PADX_CTL1(index));
>> +
>> value = padctl_readl(padctl, XUSB_PADCTL_USB2_BIAS_PAD_CTL0);
>> value |= XUSB_PADCTL_USB2_BIAS_PAD_CTL0_PD;
>> padctl_writel(padctl, value, XUSB_PADCTL_USB2_BIAS_PAD_CTL0);
>>
>> out:
>> - regulator_disable(port->supply);
>> mutex_unlock(&padctl->lock);
>> return 0;
>> }
>> @@ -2120,6 +2983,120 @@ static const struct phy_ops tegra210_sata_phy_ops = {
>> .owner = THIS_MODULE,
>> };
>>
>> +static inline bool is_usb3_phy(struct phy *phy)
>> +{
>> + return (phy->ops == &tegra210_pcie_phy_ops ||
>> + phy->ops == &tegra210_sata_phy_ops);
>> +}
>> +
>> +static inline bool is_hsic_phy(struct phy *phy)
>> +{
>> + return phy->ops == &tegra210_hsic_phy_ops;
>> +}
>> +
>> +static inline bool is_utmi_phy(struct phy *phy)
>> +{
>> + return phy->ops == &tegra210_usb2_phy_ops;
>> +}
>> +
>> +static int
>> +tegra210_xusb_padctl_enable_phy_wake(struct tegra_xusb_padctl *padctl,
>> + struct phy *phy)
>> +{
>> + if (!phy)
>> + return 0;
>> +
>> + if (is_usb3_phy(phy))
>> + return tegra210_usb3_enable_phy_wake(phy);
>> + else if (is_utmi_phy(phy))
>> + return tegra210_utmi_enable_phy_wake(phy);
>> + else if (is_hsic_phy(phy))
>> + return tegra210_hsic_enable_phy_wake(phy);
>> + else
>> + return -EINVAL;
>> +}
>
> Since all of these branches return, you don't need the else and can
> write this more simply as:
>
> if (is_usb3_phy(phy))
> return ...;
>
> if (is_utmi_phy(phy))
> return ...;
>
> if (is_hsic_phy(phy))
> return ...;
>
> return -EINVAL;
>
> I'd probably also leave out the check for !phy since that should never
> happen and it might be good to just let it crash in that case to make
> sure that bug is found as quickly as possible.
>
Got it. I will do as suggested.
>> +
>> +static int
>> +tegra210_xusb_padctl_disable_phy_wake(struct tegra_xusb_padctl *padctl,
>> + struct phy *phy)
>> +{
>> + if (!phy)
>> + return 0;
>> +
>> + if (is_usb3_phy(phy))
>> + return tegra210_usb3_disable_phy_wake(phy);
>> + else if (is_utmi_phy(phy))
>> + return tegra210_utmi_disable_phy_wake(phy);
>> + else if (is_hsic_phy(phy))
>> + return tegra210_hsic_disable_phy_wake(phy);
>> + else
>> + return -EINVAL;
>> +}
>> +
>> +int tegra210_xusb_padctl_remote_wake_detected(struct phy *phy)
>> +{
>> + struct tegra_xusb_lane *lane;
>> + struct tegra_xusb_padctl *padctl;
>> +
>> + if (!phy)
>> + return 0;
>> +
>> + lane = phy_get_drvdata(phy);
>> + padctl = lane->pad->padctl;
>> +
>> + if (is_utmi_phy(phy))
>> + return tegra210_utmi_phy_remote_wake_detected(padctl,
>> + lane->index);
>> + else if (is_hsic_phy(phy))
>> + return tegra210_hsic_phy_remote_wake_detected(padctl,
>> + lane->index);
>> + else if (is_usb3_phy(phy))
>> + return tegra210_usb3_phy_remote_wake_detected(padctl,
>> + tegra210_usb3_lane_map(lane));
>> +
>> + return -EINVAL;
>> +}
>> +
>> +static int
>> +tegra210_xusb_padctl_enable_phy_sleepwalk(struct tegra_xusb_padctl *padctl,
>> + struct phy *phy,
>> + enum usb_device_speed speed)
>> +{
>> + if (!phy)
>> + return 0;
>> +
>> + if (is_usb3_phy(phy))
>> + return tegra210_usb3_enable_phy_sleepwalk(phy);
>> + else if (is_utmi_phy(phy))
>> + return tegra_pmc_utmi_enable_phy_sleepwalk(phy, speed);
>> + else if (is_hsic_phy(phy))
>> + return tegra_pmc_hsic_enable_phy_sleepwalk(phy);
>> + else
>> + return -EINVAL;
>> +
>> + return 0;
>> +}
>> +
>> +static int
>> +tegra210_xusb_padctl_disable_phy_sleepwalk(struct tegra_xusb_padctl *padctl,
>> + struct phy *phy)
>> +{
>> + if (!phy)
>> + return 0;
>> +
>> + if (is_usb3_phy(phy))
>> + return tegra210_usb3_disable_phy_sleepwalk(phy);
>> + else if (is_utmi_phy(phy))
>> + return tegra_pmc_utmi_disable_phy_sleepwalk(phy);
>> + else if (is_hsic_phy(phy))
>> + return tegra_pmc_hsic_disable_phy_sleepwalk(phy);
>> + else
>> + return -EINVAL;
>> +
>> + return 0;
>> +}
>> +
>> +
>> static struct tegra_xusb_pad *
>> tegra210_sata_pad_probe(struct tegra_xusb_padctl *padctl,
>> const struct tegra_xusb_pad_soc *soc,
>> @@ -2317,6 +3294,8 @@ tegra210_xusb_padctl_probe(struct device *dev,
>> const struct tegra_xusb_padctl_soc *soc)
>> {
>> struct tegra210_xusb_padctl *padctl;
>> + struct device_node *node, *np = dev->of_node;
>> + struct platform_device *pmc_dev;
>> int err;
>>
>> padctl = devm_kzalloc(dev, sizeof(*padctl), GFP_KERNEL);
>> @@ -2330,6 +3309,24 @@ tegra210_xusb_padctl_probe(struct device *dev,
>> if (err < 0)
>> return ERR_PTR(err);
>>
>> + node = of_parse_phandle(np, "nvidia,pmc", 0);
>> + if (!node) {
>> + dev_err(dev, "nvidia,pmc property is missing\n");
>> + return ERR_PTR(-ENODEV);
>> + }
>> +
>> + pmc_dev = of_find_device_by_node(node);
>> + if (!pmc_dev) {
>> + dev_err(dev, "pmc device is not available\n");
>> + return ERR_PTR(-ENODEV);
>> + }
>> +
>> + padctl->pmc_reg = dev_get_regmap(&pmc_dev->dev, "usb_sleepwalk");
>> + if (!padctl->pmc_reg) {
>> + dev_err(dev, "pmc regmap is not available.\n");
>> + return ERR_PTR(-ENODEV);
>> + }
>
> We'll have to make this optional for backwards compatibility, which will
> also help make this easier to merge because it doesn't all have to go in
> at the same time.
>
Understood. I will make it optional in the next revision.
> Thierry
>
>> +
>> return &padctl->base;
>> }
>>
>> @@ -2337,13 +3334,80 @@ static void tegra210_xusb_padctl_remove(struct tegra_xusb_padctl *padctl)
>> {
>> }
>>
>> +static void tegra210_xusb_padctl_save(struct tegra_xusb_padctl *padctl)
>> +{
>> + struct tegra210_xusb_padctl *priv = to_tegra210_xusb_padctl(padctl);
>> +
>> + 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_map =
>> + padctl_readl(padctl, XUSB_PADCTL_SS_PORT_MAP);
>> + priv->context.usb3_pad_mux =
>> + padctl_readl(padctl, XUSB_PADCTL_USB3_PAD_MUX);
>> +}
>> +
>> +static void tegra210_xusb_padctl_restore(struct tegra_xusb_padctl *padctl)
>> +{
>> + struct tegra210_xusb_padctl *priv = to_tegra210_xusb_padctl(padctl);
>> + int i;
>> +
>> + 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_map,
>> + XUSB_PADCTL_SS_PORT_MAP);
>> +
>> + for (i = 0; i <= 7; i ++)
>> + tegra210_uphy_lane_iddq_enable(padctl, i);
>> +
>> + padctl_writel(padctl, priv->context.usb3_pad_mux,
>> + XUSB_PADCTL_USB3_PAD_MUX);
>> +
>> + for (i = 0; i <= 7; i ++)
>> + tegra210_uphy_lane_iddq_disable(padctl, i);
>> +}
>> +
>> +static int tegra210_xusb_padctl_suspend_noirq(struct tegra_xusb_padctl *padctl)
>> +{
>> + mutex_lock(&padctl->lock);
>> +
>> + tegra210_uphy_deinit(padctl);
>> +
>> + tegra210_xusb_padctl_save(padctl);
>> +
>> + mutex_unlock(&padctl->lock);
>> + return 0;
>> +}
>> +
>> +static int tegra210_xusb_padctl_resume_noirq(struct tegra_xusb_padctl *padctl)
>> +{
>> + mutex_lock(&padctl->lock);
>> +
>> + tegra210_xusb_padctl_restore(padctl);
>> +
>> + tegra210_uphy_init(padctl);
>> +
>> + mutex_unlock(&padctl->lock);
>> + return 0;
>> +}
>> +
>> static const struct tegra_xusb_padctl_ops tegra210_xusb_padctl_ops = {
>> .probe = tegra210_xusb_padctl_probe,
>> .remove = tegra210_xusb_padctl_remove,
>> + .suspend_noirq = tegra210_xusb_padctl_suspend_noirq,
>> + .resume_noirq = tegra210_xusb_padctl_resume_noirq,
>> .usb3_set_lfps_detect = tegra210_usb3_set_lfps_detect,
>> .hsic_set_idle = tegra210_hsic_set_idle,
>> .vbus_override = tegra210_xusb_padctl_vbus_override,
>> .utmi_port_reset = tegra210_utmi_port_reset,
>> + .enable_phy_sleepwalk = tegra210_xusb_padctl_enable_phy_sleepwalk,
>> + .disable_phy_sleepwalk = tegra210_xusb_padctl_disable_phy_sleepwalk,
>> + .enable_phy_wake = tegra210_xusb_padctl_enable_phy_wake,
>> + .disable_phy_wake = tegra210_xusb_padctl_disable_phy_wake,
>> + .remote_wake_detected = tegra210_xusb_padctl_remote_wake_detected,
>> };
>>
>> static const char * const tegra210_xusb_padctl_supply_names[] = {
>> --
>> 2.25.1
>>
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