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- // SPDX-License-Identifier: GPL-2.0-or-later
- /*
- * Allwinner sun4i USB phy driver
- *
- * Copyright (C) 2014-2015 Hans de Goede <[email protected]>
- *
- * Based on code from
- * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
- *
- * Modelled after: Samsung S5P/Exynos SoC series MIPI CSIS/DSIM DPHY driver
- * Copyright (C) 2013 Samsung Electronics Co., Ltd.
- * Author: Sylwester Nawrocki <[email protected]>
- */
- #include <linux/clk.h>
- #include <linux/delay.h>
- #include <linux/err.h>
- #include <linux/extcon-provider.h>
- #include <linux/gpio/consumer.h>
- #include <linux/io.h>
- #include <linux/interrupt.h>
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/mutex.h>
- #include <linux/of.h>
- #include <linux/of_address.h>
- #include <linux/of_device.h>
- #include <linux/of_gpio.h>
- #include <linux/phy/phy.h>
- #include <linux/phy/phy-sun4i-usb.h>
- #include <linux/platform_device.h>
- #include <linux/power_supply.h>
- #include <linux/regulator/consumer.h>
- #include <linux/reset.h>
- #include <linux/spinlock.h>
- #include <linux/usb/of.h>
- #include <linux/workqueue.h>
- #define REG_ISCR 0x00
- #define REG_PHYCTL_A10 0x04
- #define REG_PHYBIST 0x08
- #define REG_PHYTUNE 0x0c
- #define REG_PHYCTL_A33 0x10
- #define REG_PHY_OTGCTL 0x20
- #define REG_HCI_PHY_CTL 0x10
- #define PHYCTL_DATA BIT(7)
- #define OTGCTL_ROUTE_MUSB BIT(0)
- #define SUNXI_AHB_ICHR8_EN BIT(10)
- #define SUNXI_AHB_INCR4_BURST_EN BIT(9)
- #define SUNXI_AHB_INCRX_ALIGN_EN BIT(8)
- #define SUNXI_ULPI_BYPASS_EN BIT(0)
- /* ISCR, Interface Status and Control bits */
- #define ISCR_ID_PULLUP_EN (1 << 17)
- #define ISCR_DPDM_PULLUP_EN (1 << 16)
- /* sunxi has the phy id/vbus pins not connected, so we use the force bits */
- #define ISCR_FORCE_ID_MASK (3 << 14)
- #define ISCR_FORCE_ID_LOW (2 << 14)
- #define ISCR_FORCE_ID_HIGH (3 << 14)
- #define ISCR_FORCE_VBUS_MASK (3 << 12)
- #define ISCR_FORCE_VBUS_LOW (2 << 12)
- #define ISCR_FORCE_VBUS_HIGH (3 << 12)
- /* Common Control Bits for Both PHYs */
- #define PHY_PLL_BW 0x03
- #define PHY_RES45_CAL_EN 0x0c
- /* Private Control Bits for Each PHY */
- #define PHY_TX_AMPLITUDE_TUNE 0x20
- #define PHY_TX_SLEWRATE_TUNE 0x22
- #define PHY_VBUSVALID_TH_SEL 0x25
- #define PHY_PULLUP_RES_SEL 0x27
- #define PHY_OTG_FUNC_EN 0x28
- #define PHY_VBUS_DET_EN 0x29
- #define PHY_DISCON_TH_SEL 0x2a
- #define PHY_SQUELCH_DETECT 0x3c
- /* A83T specific control bits for PHY0 */
- #define PHY_CTL_VBUSVLDEXT BIT(5)
- #define PHY_CTL_SIDDQ BIT(3)
- #define PHY_CTL_H3_SIDDQ BIT(1)
- /* A83T specific control bits for PHY2 HSIC */
- #define SUNXI_EHCI_HS_FORCE BIT(20)
- #define SUNXI_HSIC_CONNECT_DET BIT(17)
- #define SUNXI_HSIC_CONNECT_INT BIT(16)
- #define SUNXI_HSIC BIT(1)
- #define MAX_PHYS 4
- /*
- * Note do not raise the debounce time, we must report Vusb high within 100ms
- * otherwise we get Vbus errors
- */
- #define DEBOUNCE_TIME msecs_to_jiffies(50)
- #define POLL_TIME msecs_to_jiffies(250)
- enum sun4i_usb_phy_type {
- sun4i_a10_phy,
- sun6i_a31_phy,
- sun8i_a33_phy,
- sun8i_a83t_phy,
- sun8i_h3_phy,
- sun8i_r40_phy,
- sun8i_v3s_phy,
- sun50i_a64_phy,
- sun50i_h6_phy,
- };
- struct sun4i_usb_phy_cfg {
- int num_phys;
- int hsic_index;
- enum sun4i_usb_phy_type type;
- u32 disc_thresh;
- u32 hci_phy_ctl_clear;
- u8 phyctl_offset;
- bool dedicated_clocks;
- bool phy0_dual_route;
- bool needs_phy2_siddq;
- int missing_phys;
- };
- struct sun4i_usb_phy_data {
- void __iomem *base;
- const struct sun4i_usb_phy_cfg *cfg;
- enum usb_dr_mode dr_mode;
- spinlock_t reg_lock; /* guard access to phyctl reg */
- struct sun4i_usb_phy {
- struct phy *phy;
- void __iomem *pmu;
- struct regulator *vbus;
- struct reset_control *reset;
- struct clk *clk;
- struct clk *clk2;
- bool regulator_on;
- int index;
- } phys[MAX_PHYS];
- /* phy0 / otg related variables */
- struct extcon_dev *extcon;
- bool phy0_init;
- struct gpio_desc *id_det_gpio;
- struct gpio_desc *vbus_det_gpio;
- struct power_supply *vbus_power_supply;
- struct notifier_block vbus_power_nb;
- bool vbus_power_nb_registered;
- bool force_session_end;
- int id_det_irq;
- int vbus_det_irq;
- int id_det;
- int vbus_det;
- struct delayed_work detect;
- };
- #define to_sun4i_usb_phy_data(phy) \
- container_of((phy), struct sun4i_usb_phy_data, phys[(phy)->index])
- static void sun4i_usb_phy0_update_iscr(struct phy *_phy, u32 clr, u32 set)
- {
- struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
- struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
- u32 iscr;
- iscr = readl(data->base + REG_ISCR);
- iscr &= ~clr;
- iscr |= set;
- writel(iscr, data->base + REG_ISCR);
- }
- static void sun4i_usb_phy0_set_id_detect(struct phy *phy, u32 val)
- {
- if (val)
- val = ISCR_FORCE_ID_HIGH;
- else
- val = ISCR_FORCE_ID_LOW;
- sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_ID_MASK, val);
- }
- static void sun4i_usb_phy0_set_vbus_detect(struct phy *phy, u32 val)
- {
- if (val)
- val = ISCR_FORCE_VBUS_HIGH;
- else
- val = ISCR_FORCE_VBUS_LOW;
- sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_VBUS_MASK, val);
- }
- static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data,
- int len)
- {
- struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy);
- u32 temp, usbc_bit = BIT(phy->index * 2);
- void __iomem *phyctl = phy_data->base + phy_data->cfg->phyctl_offset;
- unsigned long flags;
- int i;
- spin_lock_irqsave(&phy_data->reg_lock, flags);
- if (phy_data->cfg->phyctl_offset == REG_PHYCTL_A33) {
- /* SoCs newer than A33 need us to set phyctl to 0 explicitly */
- writel(0, phyctl);
- }
- for (i = 0; i < len; i++) {
- temp = readl(phyctl);
- /* clear the address portion */
- temp &= ~(0xff << 8);
- /* set the address */
- temp |= ((addr + i) << 8);
- writel(temp, phyctl);
- /* set the data bit and clear usbc bit*/
- temp = readb(phyctl);
- if (data & 0x1)
- temp |= PHYCTL_DATA;
- else
- temp &= ~PHYCTL_DATA;
- temp &= ~usbc_bit;
- writeb(temp, phyctl);
- /* pulse usbc_bit */
- temp = readb(phyctl);
- temp |= usbc_bit;
- writeb(temp, phyctl);
- temp = readb(phyctl);
- temp &= ~usbc_bit;
- writeb(temp, phyctl);
- data >>= 1;
- }
- spin_unlock_irqrestore(&phy_data->reg_lock, flags);
- }
- static void sun4i_usb_phy_passby(struct sun4i_usb_phy *phy, int enable)
- {
- struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy);
- u32 bits, reg_value;
- if (!phy->pmu)
- return;
- bits = SUNXI_AHB_ICHR8_EN | SUNXI_AHB_INCR4_BURST_EN |
- SUNXI_AHB_INCRX_ALIGN_EN | SUNXI_ULPI_BYPASS_EN;
- /* A83T USB2 is HSIC */
- if (phy_data->cfg->type == sun8i_a83t_phy && phy->index == 2)
- bits |= SUNXI_EHCI_HS_FORCE | SUNXI_HSIC_CONNECT_INT |
- SUNXI_HSIC;
- reg_value = readl(phy->pmu);
- if (enable)
- reg_value |= bits;
- else
- reg_value &= ~bits;
- writel(reg_value, phy->pmu);
- }
- static int sun4i_usb_phy_init(struct phy *_phy)
- {
- struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
- struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
- int ret;
- u32 val;
- ret = clk_prepare_enable(phy->clk);
- if (ret)
- return ret;
- ret = clk_prepare_enable(phy->clk2);
- if (ret) {
- clk_disable_unprepare(phy->clk);
- return ret;
- }
- ret = reset_control_deassert(phy->reset);
- if (ret) {
- clk_disable_unprepare(phy->clk2);
- clk_disable_unprepare(phy->clk);
- return ret;
- }
- /* Some PHYs on some SoCs need the help of PHY2 to work. */
- if (data->cfg->needs_phy2_siddq && phy->index != 2) {
- struct sun4i_usb_phy *phy2 = &data->phys[2];
- ret = clk_prepare_enable(phy2->clk);
- if (ret) {
- reset_control_assert(phy->reset);
- clk_disable_unprepare(phy->clk2);
- clk_disable_unprepare(phy->clk);
- return ret;
- }
- ret = reset_control_deassert(phy2->reset);
- if (ret) {
- clk_disable_unprepare(phy2->clk);
- reset_control_assert(phy->reset);
- clk_disable_unprepare(phy->clk2);
- clk_disable_unprepare(phy->clk);
- return ret;
- }
- /*
- * This extra clock is just needed to access the
- * REG_HCI_PHY_CTL PMU register for PHY2.
- */
- ret = clk_prepare_enable(phy2->clk2);
- if (ret) {
- reset_control_assert(phy2->reset);
- clk_disable_unprepare(phy2->clk);
- reset_control_assert(phy->reset);
- clk_disable_unprepare(phy->clk2);
- clk_disable_unprepare(phy->clk);
- return ret;
- }
- if (phy2->pmu && data->cfg->hci_phy_ctl_clear) {
- val = readl(phy2->pmu + REG_HCI_PHY_CTL);
- val &= ~data->cfg->hci_phy_ctl_clear;
- writel(val, phy2->pmu + REG_HCI_PHY_CTL);
- }
- clk_disable_unprepare(phy->clk2);
- }
- if (phy->pmu && data->cfg->hci_phy_ctl_clear) {
- val = readl(phy->pmu + REG_HCI_PHY_CTL);
- val &= ~data->cfg->hci_phy_ctl_clear;
- writel(val, phy->pmu + REG_HCI_PHY_CTL);
- }
- if (data->cfg->type == sun8i_a83t_phy ||
- data->cfg->type == sun50i_h6_phy) {
- if (phy->index == 0) {
- val = readl(data->base + data->cfg->phyctl_offset);
- val |= PHY_CTL_VBUSVLDEXT;
- val &= ~PHY_CTL_SIDDQ;
- writel(val, data->base + data->cfg->phyctl_offset);
- }
- } else {
- /* Enable USB 45 Ohm resistor calibration */
- if (phy->index == 0)
- sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
- /* Adjust PHY's magnitude and rate */
- sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
- /* Disconnect threshold adjustment */
- sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL,
- data->cfg->disc_thresh, 2);
- }
- sun4i_usb_phy_passby(phy, 1);
- if (phy->index == 0) {
- data->phy0_init = true;
- /* Enable pull-ups */
- sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_DPDM_PULLUP_EN);
- sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_ID_PULLUP_EN);
- /* Force ISCR and cable state updates */
- data->id_det = -1;
- data->vbus_det = -1;
- queue_delayed_work(system_wq, &data->detect, 0);
- }
- return 0;
- }
- static int sun4i_usb_phy_exit(struct phy *_phy)
- {
- struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
- struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
- if (phy->index == 0) {
- if (data->cfg->type == sun8i_a83t_phy ||
- data->cfg->type == sun50i_h6_phy) {
- void __iomem *phyctl = data->base +
- data->cfg->phyctl_offset;
- writel(readl(phyctl) | PHY_CTL_SIDDQ, phyctl);
- }
- /* Disable pull-ups */
- sun4i_usb_phy0_update_iscr(_phy, ISCR_DPDM_PULLUP_EN, 0);
- sun4i_usb_phy0_update_iscr(_phy, ISCR_ID_PULLUP_EN, 0);
- data->phy0_init = false;
- }
- if (data->cfg->needs_phy2_siddq && phy->index != 2) {
- struct sun4i_usb_phy *phy2 = &data->phys[2];
- clk_disable_unprepare(phy2->clk);
- reset_control_assert(phy2->reset);
- }
- sun4i_usb_phy_passby(phy, 0);
- reset_control_assert(phy->reset);
- clk_disable_unprepare(phy->clk2);
- clk_disable_unprepare(phy->clk);
- return 0;
- }
- static int sun4i_usb_phy0_get_id_det(struct sun4i_usb_phy_data *data)
- {
- switch (data->dr_mode) {
- case USB_DR_MODE_OTG:
- if (data->id_det_gpio)
- return gpiod_get_value_cansleep(data->id_det_gpio);
- else
- return 1; /* Fallback to peripheral mode */
- case USB_DR_MODE_HOST:
- return 0;
- case USB_DR_MODE_PERIPHERAL:
- default:
- return 1;
- }
- }
- static int sun4i_usb_phy0_get_vbus_det(struct sun4i_usb_phy_data *data)
- {
- if (data->vbus_det_gpio)
- return gpiod_get_value_cansleep(data->vbus_det_gpio);
- if (data->vbus_power_supply) {
- union power_supply_propval val;
- int r;
- r = power_supply_get_property(data->vbus_power_supply,
- POWER_SUPPLY_PROP_PRESENT, &val);
- if (r == 0)
- return val.intval;
- }
- /* Fallback: report vbus as high */
- return 1;
- }
- static bool sun4i_usb_phy0_have_vbus_det(struct sun4i_usb_phy_data *data)
- {
- return data->vbus_det_gpio || data->vbus_power_supply;
- }
- static bool sun4i_usb_phy0_poll(struct sun4i_usb_phy_data *data)
- {
- if ((data->id_det_gpio && data->id_det_irq <= 0) ||
- (data->vbus_det_gpio && data->vbus_det_irq <= 0))
- return true;
- /*
- * The A31/A23/A33 companion pmics (AXP221/AXP223) do not
- * generate vbus change interrupts when the board is driving
- * vbus using the N_VBUSEN pin on the pmic, so we must poll
- * when using the pmic for vbus-det _and_ we're driving vbus.
- */
- if ((data->cfg->type == sun6i_a31_phy ||
- data->cfg->type == sun8i_a33_phy) &&
- data->vbus_power_supply && data->phys[0].regulator_on)
- return true;
- return false;
- }
- static int sun4i_usb_phy_power_on(struct phy *_phy)
- {
- struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
- struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
- int ret;
- if (!phy->vbus || phy->regulator_on)
- return 0;
- /* For phy0 only turn on Vbus if we don't have an ext. Vbus */
- if (phy->index == 0 && sun4i_usb_phy0_have_vbus_det(data) &&
- data->vbus_det) {
- dev_warn(&_phy->dev, "External vbus detected, not enabling our own vbus\n");
- return 0;
- }
- ret = regulator_enable(phy->vbus);
- if (ret)
- return ret;
- phy->regulator_on = true;
- /* We must report Vbus high within OTG_TIME_A_WAIT_VRISE msec. */
- if (phy->index == 0 && sun4i_usb_phy0_poll(data))
- mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
- return 0;
- }
- static int sun4i_usb_phy_power_off(struct phy *_phy)
- {
- struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
- struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
- if (!phy->vbus || !phy->regulator_on)
- return 0;
- regulator_disable(phy->vbus);
- phy->regulator_on = false;
- /*
- * phy0 vbus typically slowly discharges, sometimes this causes the
- * Vbus gpio to not trigger an edge irq on Vbus off, so force a rescan.
- */
- if (phy->index == 0 && !sun4i_usb_phy0_poll(data))
- mod_delayed_work(system_wq, &data->detect, POLL_TIME);
- return 0;
- }
- static int sun4i_usb_phy_set_mode(struct phy *_phy,
- enum phy_mode mode, int submode)
- {
- struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
- struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
- int new_mode;
- if (phy->index != 0) {
- if (mode == PHY_MODE_USB_HOST)
- return 0;
- return -EINVAL;
- }
- switch (mode) {
- case PHY_MODE_USB_HOST:
- new_mode = USB_DR_MODE_HOST;
- break;
- case PHY_MODE_USB_DEVICE:
- new_mode = USB_DR_MODE_PERIPHERAL;
- break;
- case PHY_MODE_USB_OTG:
- new_mode = USB_DR_MODE_OTG;
- break;
- default:
- return -EINVAL;
- }
- if (new_mode != data->dr_mode) {
- dev_info(&_phy->dev, "Changing dr_mode to %d\n", new_mode);
- data->dr_mode = new_mode;
- }
- data->id_det = -1; /* Force reprocessing of id */
- data->force_session_end = true;
- queue_delayed_work(system_wq, &data->detect, 0);
- return 0;
- }
- void sun4i_usb_phy_set_squelch_detect(struct phy *_phy, bool enabled)
- {
- struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
- sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2);
- }
- EXPORT_SYMBOL_GPL(sun4i_usb_phy_set_squelch_detect);
- static const struct phy_ops sun4i_usb_phy_ops = {
- .init = sun4i_usb_phy_init,
- .exit = sun4i_usb_phy_exit,
- .power_on = sun4i_usb_phy_power_on,
- .power_off = sun4i_usb_phy_power_off,
- .set_mode = sun4i_usb_phy_set_mode,
- .owner = THIS_MODULE,
- };
- static void sun4i_usb_phy0_reroute(struct sun4i_usb_phy_data *data, int id_det)
- {
- u32 regval;
- regval = readl(data->base + REG_PHY_OTGCTL);
- if (id_det == 0) {
- /* Host mode. Route phy0 to EHCI/OHCI */
- regval &= ~OTGCTL_ROUTE_MUSB;
- } else {
- /* Peripheral mode. Route phy0 to MUSB */
- regval |= OTGCTL_ROUTE_MUSB;
- }
- writel(regval, data->base + REG_PHY_OTGCTL);
- }
- static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
- {
- struct sun4i_usb_phy_data *data =
- container_of(work, struct sun4i_usb_phy_data, detect.work);
- struct phy *phy0 = data->phys[0].phy;
- struct sun4i_usb_phy *phy;
- bool force_session_end, id_notify = false, vbus_notify = false;
- int id_det, vbus_det;
- if (!phy0)
- return;
- phy = phy_get_drvdata(phy0);
- id_det = sun4i_usb_phy0_get_id_det(data);
- vbus_det = sun4i_usb_phy0_get_vbus_det(data);
- mutex_lock(&phy0->mutex);
- if (!data->phy0_init) {
- mutex_unlock(&phy0->mutex);
- return;
- }
- force_session_end = data->force_session_end;
- data->force_session_end = false;
- if (id_det != data->id_det) {
- /* id-change, force session end if we've no vbus detection */
- if (data->dr_mode == USB_DR_MODE_OTG &&
- !sun4i_usb_phy0_have_vbus_det(data))
- force_session_end = true;
- /* When entering host mode (id = 0) force end the session now */
- if (force_session_end && id_det == 0) {
- sun4i_usb_phy0_set_vbus_detect(phy0, 0);
- msleep(200);
- sun4i_usb_phy0_set_vbus_detect(phy0, 1);
- }
- sun4i_usb_phy0_set_id_detect(phy0, id_det);
- data->id_det = id_det;
- id_notify = true;
- }
- if (vbus_det != data->vbus_det) {
- sun4i_usb_phy0_set_vbus_detect(phy0, vbus_det);
- data->vbus_det = vbus_det;
- vbus_notify = true;
- }
- mutex_unlock(&phy0->mutex);
- if (id_notify) {
- extcon_set_state_sync(data->extcon, EXTCON_USB_HOST,
- !id_det);
- /* When leaving host mode force end the session here */
- if (force_session_end && id_det == 1) {
- mutex_lock(&phy0->mutex);
- sun4i_usb_phy0_set_vbus_detect(phy0, 0);
- msleep(1000);
- sun4i_usb_phy0_set_vbus_detect(phy0, 1);
- mutex_unlock(&phy0->mutex);
- }
- /* Enable PHY0 passby for host mode only. */
- sun4i_usb_phy_passby(phy, !id_det);
- /* Re-route PHY0 if necessary */
- if (data->cfg->phy0_dual_route)
- sun4i_usb_phy0_reroute(data, id_det);
- }
- if (vbus_notify)
- extcon_set_state_sync(data->extcon, EXTCON_USB, vbus_det);
- if (sun4i_usb_phy0_poll(data))
- queue_delayed_work(system_wq, &data->detect, POLL_TIME);
- }
- static irqreturn_t sun4i_usb_phy0_id_vbus_det_irq(int irq, void *dev_id)
- {
- struct sun4i_usb_phy_data *data = dev_id;
- /* vbus or id changed, let the pins settle and then scan them */
- mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
- return IRQ_HANDLED;
- }
- static int sun4i_usb_phy0_vbus_notify(struct notifier_block *nb,
- unsigned long val, void *v)
- {
- struct sun4i_usb_phy_data *data =
- container_of(nb, struct sun4i_usb_phy_data, vbus_power_nb);
- struct power_supply *psy = v;
- /* Properties on the vbus_power_supply changed, scan vbus_det */
- if (val == PSY_EVENT_PROP_CHANGED && psy == data->vbus_power_supply)
- mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
- return NOTIFY_OK;
- }
- static struct phy *sun4i_usb_phy_xlate(struct device *dev,
- struct of_phandle_args *args)
- {
- struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
- if (args->args[0] >= data->cfg->num_phys)
- return ERR_PTR(-ENODEV);
- if (data->cfg->missing_phys & BIT(args->args[0]))
- return ERR_PTR(-ENODEV);
- return data->phys[args->args[0]].phy;
- }
- static int sun4i_usb_phy_remove(struct platform_device *pdev)
- {
- struct device *dev = &pdev->dev;
- struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
- if (data->vbus_power_nb_registered)
- power_supply_unreg_notifier(&data->vbus_power_nb);
- if (data->id_det_irq > 0)
- devm_free_irq(dev, data->id_det_irq, data);
- if (data->vbus_det_irq > 0)
- devm_free_irq(dev, data->vbus_det_irq, data);
- cancel_delayed_work_sync(&data->detect);
- return 0;
- }
- static const unsigned int sun4i_usb_phy0_cable[] = {
- EXTCON_USB,
- EXTCON_USB_HOST,
- EXTCON_NONE,
- };
- static int sun4i_usb_phy_probe(struct platform_device *pdev)
- {
- struct sun4i_usb_phy_data *data;
- struct device *dev = &pdev->dev;
- struct device_node *np = dev->of_node;
- struct phy_provider *phy_provider;
- int i, ret;
- data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
- spin_lock_init(&data->reg_lock);
- INIT_DELAYED_WORK(&data->detect, sun4i_usb_phy0_id_vbus_det_scan);
- dev_set_drvdata(dev, data);
- data->cfg = of_device_get_match_data(dev);
- if (!data->cfg)
- return -EINVAL;
- data->base = devm_platform_ioremap_resource_byname(pdev, "phy_ctrl");
- if (IS_ERR(data->base))
- return PTR_ERR(data->base);
- data->id_det_gpio = devm_gpiod_get_optional(dev, "usb0_id_det",
- GPIOD_IN);
- if (IS_ERR(data->id_det_gpio)) {
- dev_err(dev, "Couldn't request ID GPIO\n");
- return PTR_ERR(data->id_det_gpio);
- }
- data->vbus_det_gpio = devm_gpiod_get_optional(dev, "usb0_vbus_det",
- GPIOD_IN);
- if (IS_ERR(data->vbus_det_gpio)) {
- dev_err(dev, "Couldn't request VBUS detect GPIO\n");
- return PTR_ERR(data->vbus_det_gpio);
- }
- if (of_find_property(np, "usb0_vbus_power-supply", NULL)) {
- data->vbus_power_supply = devm_power_supply_get_by_phandle(dev,
- "usb0_vbus_power-supply");
- if (IS_ERR(data->vbus_power_supply)) {
- dev_err(dev, "Couldn't get the VBUS power supply\n");
- return PTR_ERR(data->vbus_power_supply);
- }
- if (!data->vbus_power_supply)
- return -EPROBE_DEFER;
- }
- data->dr_mode = of_usb_get_dr_mode_by_phy(np, 0);
- data->extcon = devm_extcon_dev_allocate(dev, sun4i_usb_phy0_cable);
- if (IS_ERR(data->extcon)) {
- dev_err(dev, "Couldn't allocate our extcon device\n");
- return PTR_ERR(data->extcon);
- }
- ret = devm_extcon_dev_register(dev, data->extcon);
- if (ret) {
- dev_err(dev, "failed to register extcon: %d\n", ret);
- return ret;
- }
- for (i = 0; i < data->cfg->num_phys; i++) {
- struct sun4i_usb_phy *phy = data->phys + i;
- char name[16];
- if (data->cfg->missing_phys & BIT(i))
- continue;
- snprintf(name, sizeof(name), "usb%d_vbus", i);
- phy->vbus = devm_regulator_get_optional(dev, name);
- if (IS_ERR(phy->vbus)) {
- if (PTR_ERR(phy->vbus) == -EPROBE_DEFER) {
- dev_err(dev,
- "Couldn't get regulator %s... Deferring probe\n",
- name);
- return -EPROBE_DEFER;
- }
- phy->vbus = NULL;
- }
- if (data->cfg->dedicated_clocks)
- snprintf(name, sizeof(name), "usb%d_phy", i);
- else
- strscpy(name, "usb_phy", sizeof(name));
- phy->clk = devm_clk_get(dev, name);
- if (IS_ERR(phy->clk)) {
- dev_err(dev, "failed to get clock %s\n", name);
- return PTR_ERR(phy->clk);
- }
- /* The first PHY is always tied to OTG, and never HSIC */
- if (data->cfg->hsic_index && i == data->cfg->hsic_index) {
- /* HSIC needs secondary clock */
- snprintf(name, sizeof(name), "usb%d_hsic_12M", i);
- phy->clk2 = devm_clk_get(dev, name);
- if (IS_ERR(phy->clk2)) {
- dev_err(dev, "failed to get clock %s\n", name);
- return PTR_ERR(phy->clk2);
- }
- } else {
- snprintf(name, sizeof(name), "pmu%d_clk", i);
- phy->clk2 = devm_clk_get_optional(dev, name);
- if (IS_ERR(phy->clk2)) {
- dev_err(dev, "failed to get clock %s\n", name);
- return PTR_ERR(phy->clk2);
- }
- }
- snprintf(name, sizeof(name), "usb%d_reset", i);
- phy->reset = devm_reset_control_get(dev, name);
- if (IS_ERR(phy->reset)) {
- dev_err(dev, "failed to get reset %s\n", name);
- return PTR_ERR(phy->reset);
- }
- if (i || data->cfg->phy0_dual_route) { /* No pmu for musb */
- snprintf(name, sizeof(name), "pmu%d", i);
- phy->pmu = devm_platform_ioremap_resource_byname(pdev, name);
- if (IS_ERR(phy->pmu))
- return PTR_ERR(phy->pmu);
- }
- phy->phy = devm_phy_create(dev, NULL, &sun4i_usb_phy_ops);
- if (IS_ERR(phy->phy)) {
- dev_err(dev, "failed to create PHY %d\n", i);
- return PTR_ERR(phy->phy);
- }
- phy->index = i;
- phy_set_drvdata(phy->phy, &data->phys[i]);
- }
- data->id_det_irq = gpiod_to_irq(data->id_det_gpio);
- if (data->id_det_irq > 0) {
- ret = devm_request_irq(dev, data->id_det_irq,
- sun4i_usb_phy0_id_vbus_det_irq,
- IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
- "usb0-id-det", data);
- if (ret) {
- dev_err(dev, "Err requesting id-det-irq: %d\n", ret);
- return ret;
- }
- }
- data->vbus_det_irq = gpiod_to_irq(data->vbus_det_gpio);
- if (data->vbus_det_irq > 0) {
- ret = devm_request_irq(dev, data->vbus_det_irq,
- sun4i_usb_phy0_id_vbus_det_irq,
- IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
- "usb0-vbus-det", data);
- if (ret) {
- dev_err(dev, "Err requesting vbus-det-irq: %d\n", ret);
- data->vbus_det_irq = -1;
- sun4i_usb_phy_remove(pdev); /* Stop detect work */
- return ret;
- }
- }
- if (data->vbus_power_supply) {
- data->vbus_power_nb.notifier_call = sun4i_usb_phy0_vbus_notify;
- data->vbus_power_nb.priority = 0;
- ret = power_supply_reg_notifier(&data->vbus_power_nb);
- if (ret) {
- sun4i_usb_phy_remove(pdev); /* Stop detect work */
- return ret;
- }
- data->vbus_power_nb_registered = true;
- }
- phy_provider = devm_of_phy_provider_register(dev, sun4i_usb_phy_xlate);
- if (IS_ERR(phy_provider)) {
- sun4i_usb_phy_remove(pdev); /* Stop detect work */
- return PTR_ERR(phy_provider);
- }
- dev_dbg(dev, "successfully loaded\n");
- return 0;
- }
- static const struct sun4i_usb_phy_cfg sun4i_a10_cfg = {
- .num_phys = 3,
- .type = sun4i_a10_phy,
- .disc_thresh = 3,
- .phyctl_offset = REG_PHYCTL_A10,
- .dedicated_clocks = false,
- };
- static const struct sun4i_usb_phy_cfg sun5i_a13_cfg = {
- .num_phys = 2,
- .type = sun4i_a10_phy,
- .disc_thresh = 2,
- .phyctl_offset = REG_PHYCTL_A10,
- .dedicated_clocks = false,
- };
- static const struct sun4i_usb_phy_cfg sun6i_a31_cfg = {
- .num_phys = 3,
- .type = sun6i_a31_phy,
- .disc_thresh = 3,
- .phyctl_offset = REG_PHYCTL_A10,
- .dedicated_clocks = true,
- };
- static const struct sun4i_usb_phy_cfg sun7i_a20_cfg = {
- .num_phys = 3,
- .type = sun4i_a10_phy,
- .disc_thresh = 2,
- .phyctl_offset = REG_PHYCTL_A10,
- .dedicated_clocks = false,
- };
- static const struct sun4i_usb_phy_cfg sun8i_a23_cfg = {
- .num_phys = 2,
- .type = sun6i_a31_phy,
- .disc_thresh = 3,
- .phyctl_offset = REG_PHYCTL_A10,
- .dedicated_clocks = true,
- };
- static const struct sun4i_usb_phy_cfg sun8i_a33_cfg = {
- .num_phys = 2,
- .type = sun8i_a33_phy,
- .disc_thresh = 3,
- .phyctl_offset = REG_PHYCTL_A33,
- .dedicated_clocks = true,
- };
- static const struct sun4i_usb_phy_cfg sun8i_a83t_cfg = {
- .num_phys = 3,
- .hsic_index = 2,
- .type = sun8i_a83t_phy,
- .phyctl_offset = REG_PHYCTL_A33,
- .dedicated_clocks = true,
- };
- static const struct sun4i_usb_phy_cfg sun8i_h3_cfg = {
- .num_phys = 4,
- .type = sun8i_h3_phy,
- .disc_thresh = 3,
- .phyctl_offset = REG_PHYCTL_A33,
- .dedicated_clocks = true,
- .hci_phy_ctl_clear = PHY_CTL_H3_SIDDQ,
- .phy0_dual_route = true,
- };
- static const struct sun4i_usb_phy_cfg sun8i_r40_cfg = {
- .num_phys = 3,
- .type = sun8i_r40_phy,
- .disc_thresh = 3,
- .phyctl_offset = REG_PHYCTL_A33,
- .dedicated_clocks = true,
- .hci_phy_ctl_clear = PHY_CTL_H3_SIDDQ,
- .phy0_dual_route = true,
- };
- static const struct sun4i_usb_phy_cfg sun8i_v3s_cfg = {
- .num_phys = 1,
- .type = sun8i_v3s_phy,
- .disc_thresh = 3,
- .phyctl_offset = REG_PHYCTL_A33,
- .dedicated_clocks = true,
- .hci_phy_ctl_clear = PHY_CTL_H3_SIDDQ,
- .phy0_dual_route = true,
- };
- static const struct sun4i_usb_phy_cfg sun20i_d1_cfg = {
- .num_phys = 2,
- .type = sun50i_h6_phy,
- .phyctl_offset = REG_PHYCTL_A33,
- .dedicated_clocks = true,
- .hci_phy_ctl_clear = PHY_CTL_SIDDQ,
- .phy0_dual_route = true,
- };
- static const struct sun4i_usb_phy_cfg sun50i_a64_cfg = {
- .num_phys = 2,
- .type = sun50i_a64_phy,
- .disc_thresh = 3,
- .phyctl_offset = REG_PHYCTL_A33,
- .dedicated_clocks = true,
- .hci_phy_ctl_clear = PHY_CTL_H3_SIDDQ,
- .phy0_dual_route = true,
- };
- static const struct sun4i_usb_phy_cfg sun50i_h6_cfg = {
- .num_phys = 4,
- .type = sun50i_h6_phy,
- .phyctl_offset = REG_PHYCTL_A33,
- .dedicated_clocks = true,
- .phy0_dual_route = true,
- .missing_phys = BIT(1) | BIT(2),
- };
- static const struct sun4i_usb_phy_cfg sun50i_h616_cfg = {
- .num_phys = 4,
- .type = sun50i_h6_phy,
- .disc_thresh = 3,
- .phyctl_offset = REG_PHYCTL_A33,
- .dedicated_clocks = true,
- .phy0_dual_route = true,
- .hci_phy_ctl_clear = PHY_CTL_SIDDQ,
- .needs_phy2_siddq = true,
- };
- static const struct of_device_id sun4i_usb_phy_of_match[] = {
- { .compatible = "allwinner,sun4i-a10-usb-phy", .data = &sun4i_a10_cfg },
- { .compatible = "allwinner,sun5i-a13-usb-phy", .data = &sun5i_a13_cfg },
- { .compatible = "allwinner,sun6i-a31-usb-phy", .data = &sun6i_a31_cfg },
- { .compatible = "allwinner,sun7i-a20-usb-phy", .data = &sun7i_a20_cfg },
- { .compatible = "allwinner,sun8i-a23-usb-phy", .data = &sun8i_a23_cfg },
- { .compatible = "allwinner,sun8i-a33-usb-phy", .data = &sun8i_a33_cfg },
- { .compatible = "allwinner,sun8i-a83t-usb-phy", .data = &sun8i_a83t_cfg },
- { .compatible = "allwinner,sun8i-h3-usb-phy", .data = &sun8i_h3_cfg },
- { .compatible = "allwinner,sun8i-r40-usb-phy", .data = &sun8i_r40_cfg },
- { .compatible = "allwinner,sun8i-v3s-usb-phy", .data = &sun8i_v3s_cfg },
- { .compatible = "allwinner,sun20i-d1-usb-phy", .data = &sun20i_d1_cfg },
- { .compatible = "allwinner,sun50i-a64-usb-phy",
- .data = &sun50i_a64_cfg},
- { .compatible = "allwinner,sun50i-h6-usb-phy", .data = &sun50i_h6_cfg },
- { .compatible = "allwinner,sun50i-h616-usb-phy", .data = &sun50i_h616_cfg },
- { },
- };
- MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match);
- static struct platform_driver sun4i_usb_phy_driver = {
- .probe = sun4i_usb_phy_probe,
- .remove = sun4i_usb_phy_remove,
- .driver = {
- .of_match_table = sun4i_usb_phy_of_match,
- .name = "sun4i-usb-phy",
- }
- };
- module_platform_driver(sun4i_usb_phy_driver);
- MODULE_DESCRIPTION("Allwinner sun4i USB phy driver");
- MODULE_AUTHOR("Hans de Goede <[email protected]>");
- MODULE_LICENSE("GPL v2");
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