2014-03-02 01:09:26 +08:00
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/*
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* Allwinner sun4i USB phy driver
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*
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2015-06-13 20:37:45 +08:00
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* Copyright (C) 2014-2015 Hans de Goede <hdegoede@redhat.com>
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2014-03-02 01:09:26 +08:00
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*
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* Based on code from
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* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
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*
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* Modelled after: Samsung S5P/EXYNOS SoC series MIPI CSIS/DSIM DPHY driver
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* Copyright (C) 2013 Samsung Electronics Co., Ltd.
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* Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/clk.h>
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2015-06-13 20:37:50 +08:00
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#include <linux/delay.h>
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2014-05-29 14:30:49 +08:00
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#include <linux/err.h>
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2015-06-13 20:37:46 +08:00
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#include <linux/extcon.h>
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2014-03-02 01:09:26 +08:00
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#include <linux/io.h>
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2015-06-13 20:37:45 +08:00
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#include <linux/interrupt.h>
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2014-03-02 01:09:26 +08:00
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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2015-12-11 23:32:17 +08:00
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#include <linux/of_device.h>
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2015-06-13 20:37:45 +08:00
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#include <linux/of_gpio.h>
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2014-03-02 01:09:26 +08:00
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#include <linux/phy/phy.h>
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2015-03-29 18:50:46 +08:00
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#include <linux/phy/phy-sun4i-usb.h>
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2014-03-02 01:09:26 +08:00
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#include <linux/platform_device.h>
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2015-06-13 20:37:51 +08:00
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#include <linux/power_supply.h>
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2014-03-02 01:09:26 +08:00
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#include <linux/regulator/consumer.h>
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#include <linux/reset.h>
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2015-06-13 20:37:45 +08:00
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#include <linux/workqueue.h>
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2014-03-02 01:09:26 +08:00
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#define REG_ISCR 0x00
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2015-06-13 20:37:49 +08:00
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#define REG_PHYCTL_A10 0x04
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2014-03-02 01:09:26 +08:00
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#define REG_PHYBIST 0x08
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#define REG_PHYTUNE 0x0c
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2015-06-13 20:37:49 +08:00
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#define REG_PHYCTL_A33 0x10
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2015-12-11 23:32:18 +08:00
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#define REG_PHY_UNK_H3 0x20
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#define REG_PMU_UNK_H3 0x10
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2014-03-02 01:09:26 +08:00
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#define PHYCTL_DATA BIT(7)
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#define SUNXI_AHB_ICHR8_EN BIT(10)
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#define SUNXI_AHB_INCR4_BURST_EN BIT(9)
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#define SUNXI_AHB_INCRX_ALIGN_EN BIT(8)
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#define SUNXI_ULPI_BYPASS_EN BIT(0)
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2015-06-13 20:37:45 +08:00
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/* ISCR, Interface Status and Control bits */
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#define ISCR_ID_PULLUP_EN (1 << 17)
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#define ISCR_DPDM_PULLUP_EN (1 << 16)
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/* sunxi has the phy id/vbus pins not connected, so we use the force bits */
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#define ISCR_FORCE_ID_MASK (3 << 14)
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#define ISCR_FORCE_ID_LOW (2 << 14)
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#define ISCR_FORCE_ID_HIGH (3 << 14)
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#define ISCR_FORCE_VBUS_MASK (3 << 12)
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#define ISCR_FORCE_VBUS_LOW (2 << 12)
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#define ISCR_FORCE_VBUS_HIGH (3 << 12)
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2014-03-02 01:09:26 +08:00
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/* Common Control Bits for Both PHYs */
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#define PHY_PLL_BW 0x03
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#define PHY_RES45_CAL_EN 0x0c
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/* Private Control Bits for Each PHY */
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#define PHY_TX_AMPLITUDE_TUNE 0x20
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#define PHY_TX_SLEWRATE_TUNE 0x22
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#define PHY_VBUSVALID_TH_SEL 0x25
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#define PHY_PULLUP_RES_SEL 0x27
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#define PHY_OTG_FUNC_EN 0x28
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#define PHY_VBUS_DET_EN 0x29
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#define PHY_DISCON_TH_SEL 0x2a
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2015-03-29 18:50:46 +08:00
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#define PHY_SQUELCH_DETECT 0x3c
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2014-03-02 01:09:26 +08:00
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2015-12-11 23:32:18 +08:00
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#define MAX_PHYS 4
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2014-03-02 01:09:26 +08:00
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2015-06-13 20:37:45 +08:00
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/*
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* Note do not raise the debounce time, we must report Vusb high within 100ms
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* otherwise we get Vbus errors
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*/
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#define DEBOUNCE_TIME msecs_to_jiffies(50)
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#define POLL_TIME msecs_to_jiffies(250)
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2015-12-11 23:32:17 +08:00
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enum sun4i_usb_phy_type {
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sun4i_a10_phy,
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sun8i_a33_phy,
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2015-12-11 23:32:18 +08:00
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sun8i_h3_phy,
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2015-12-11 23:32:17 +08:00
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};
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struct sun4i_usb_phy_cfg {
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int num_phys;
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enum sun4i_usb_phy_type type;
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u32 disc_thresh;
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u8 phyctl_offset;
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bool dedicated_clocks;
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};
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2014-03-02 01:09:26 +08:00
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struct sun4i_usb_phy_data {
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void __iomem *base;
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2015-12-11 23:32:17 +08:00
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const struct sun4i_usb_phy_cfg *cfg;
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2014-03-02 01:09:26 +08:00
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struct mutex mutex;
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struct sun4i_usb_phy {
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struct phy *phy;
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void __iomem *pmu;
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struct regulator *vbus;
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struct reset_control *reset;
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2014-05-13 23:44:18 +08:00
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struct clk *clk;
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2015-06-13 20:37:45 +08:00
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bool regulator_on;
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2014-03-02 01:09:26 +08:00
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int index;
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} phys[MAX_PHYS];
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2015-06-13 20:37:45 +08:00
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/* phy0 / otg related variables */
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2015-06-13 20:37:46 +08:00
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struct extcon_dev *extcon;
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2015-06-13 20:37:45 +08:00
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bool phy0_init;
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bool phy0_poll;
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struct gpio_desc *id_det_gpio;
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struct gpio_desc *vbus_det_gpio;
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2015-06-13 20:37:51 +08:00
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struct power_supply *vbus_power_supply;
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struct notifier_block vbus_power_nb;
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bool vbus_power_nb_registered;
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2015-06-13 20:37:45 +08:00
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int id_det_irq;
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int vbus_det_irq;
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int id_det;
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int vbus_det;
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struct delayed_work detect;
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2014-03-02 01:09:26 +08:00
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};
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#define to_sun4i_usb_phy_data(phy) \
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container_of((phy), struct sun4i_usb_phy_data, phys[(phy)->index])
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2015-06-13 20:37:45 +08:00
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static void sun4i_usb_phy0_update_iscr(struct phy *_phy, u32 clr, u32 set)
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{
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struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
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struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
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u32 iscr;
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iscr = readl(data->base + REG_ISCR);
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iscr &= ~clr;
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iscr |= set;
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writel(iscr, data->base + REG_ISCR);
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}
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static void sun4i_usb_phy0_set_id_detect(struct phy *phy, u32 val)
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{
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if (val)
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val = ISCR_FORCE_ID_HIGH;
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else
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val = ISCR_FORCE_ID_LOW;
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sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_ID_MASK, val);
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}
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static void sun4i_usb_phy0_set_vbus_detect(struct phy *phy, u32 val)
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{
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if (val)
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val = ISCR_FORCE_VBUS_HIGH;
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else
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val = ISCR_FORCE_VBUS_LOW;
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sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_VBUS_MASK, val);
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}
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2014-03-02 01:09:26 +08:00
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static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data,
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int len)
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{
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struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy);
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u32 temp, usbc_bit = BIT(phy->index * 2);
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2015-12-11 23:32:17 +08:00
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void *phyctl = phy_data->base + phy_data->cfg->phyctl_offset;
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2014-03-02 01:09:26 +08:00
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int i;
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mutex_lock(&phy_data->mutex);
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2015-12-11 23:32:17 +08:00
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if (phy_data->cfg->type == sun8i_a33_phy) {
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2015-06-13 20:37:49 +08:00
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/* A33 needs us to set phyctl to 0 explicitly */
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writel(0, phyctl);
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}
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2014-03-02 01:09:26 +08:00
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for (i = 0; i < len; i++) {
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2015-06-13 20:37:49 +08:00
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temp = readl(phyctl);
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2014-03-02 01:09:26 +08:00
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/* clear the address portion */
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temp &= ~(0xff << 8);
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/* set the address */
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temp |= ((addr + i) << 8);
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2015-06-13 20:37:49 +08:00
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writel(temp, phyctl);
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2014-03-02 01:09:26 +08:00
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/* set the data bit and clear usbc bit*/
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2015-06-13 20:37:49 +08:00
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temp = readb(phyctl);
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2014-03-02 01:09:26 +08:00
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if (data & 0x1)
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temp |= PHYCTL_DATA;
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else
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temp &= ~PHYCTL_DATA;
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temp &= ~usbc_bit;
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2015-06-13 20:37:49 +08:00
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writeb(temp, phyctl);
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2014-03-02 01:09:26 +08:00
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/* pulse usbc_bit */
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2015-06-13 20:37:49 +08:00
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temp = readb(phyctl);
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2014-03-02 01:09:26 +08:00
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temp |= usbc_bit;
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2015-06-13 20:37:49 +08:00
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writeb(temp, phyctl);
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2014-03-02 01:09:26 +08:00
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2015-06-13 20:37:49 +08:00
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temp = readb(phyctl);
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2014-03-02 01:09:26 +08:00
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temp &= ~usbc_bit;
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2015-06-13 20:37:49 +08:00
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writeb(temp, phyctl);
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2014-03-02 01:09:26 +08:00
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data >>= 1;
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}
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mutex_unlock(&phy_data->mutex);
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}
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static void sun4i_usb_phy_passby(struct sun4i_usb_phy *phy, int enable)
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{
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u32 bits, reg_value;
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if (!phy->pmu)
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return;
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bits = SUNXI_AHB_ICHR8_EN | SUNXI_AHB_INCR4_BURST_EN |
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SUNXI_AHB_INCRX_ALIGN_EN | SUNXI_ULPI_BYPASS_EN;
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reg_value = readl(phy->pmu);
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if (enable)
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reg_value |= bits;
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else
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reg_value &= ~bits;
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writel(reg_value, phy->pmu);
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}
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static int sun4i_usb_phy_init(struct phy *_phy)
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{
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struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
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struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
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int ret;
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2015-12-11 23:32:18 +08:00
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u32 val;
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2014-03-02 01:09:26 +08:00
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2014-05-13 23:44:18 +08:00
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ret = clk_prepare_enable(phy->clk);
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2014-03-02 01:09:26 +08:00
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if (ret)
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return ret;
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ret = reset_control_deassert(phy->reset);
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if (ret) {
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2014-05-13 23:44:18 +08:00
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clk_disable_unprepare(phy->clk);
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2014-03-02 01:09:26 +08:00
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return ret;
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}
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2015-12-11 23:32:18 +08:00
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if (data->cfg->type == sun8i_h3_phy) {
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if (phy->index == 0) {
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val = readl(data->base + REG_PHY_UNK_H3);
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writel(val & ~1, data->base + REG_PHY_UNK_H3);
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}
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val = readl(phy->pmu + REG_PMU_UNK_H3);
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writel(val & ~2, phy->pmu + REG_PMU_UNK_H3);
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} else {
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/* Enable USB 45 Ohm resistor calibration */
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if (phy->index == 0)
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sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
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2014-11-11 02:55:06 +08:00
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2015-12-11 23:32:18 +08:00
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/* Adjust PHY's magnitude and rate */
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sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
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2014-03-02 01:09:26 +08:00
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2015-12-11 23:32:18 +08:00
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/* Disconnect threshold adjustment */
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sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL,
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data->cfg->disc_thresh, 2);
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}
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2014-03-02 01:09:26 +08:00
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sun4i_usb_phy_passby(phy, 1);
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2015-06-13 20:37:45 +08:00
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if (phy->index == 0) {
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data->phy0_init = true;
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/* Enable pull-ups */
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sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_DPDM_PULLUP_EN);
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sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_ID_PULLUP_EN);
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if (data->id_det_gpio) {
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/* OTG mode, force ISCR and cable state updates */
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data->id_det = -1;
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data->vbus_det = -1;
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queue_delayed_work(system_wq, &data->detect, 0);
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} else {
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/* Host only mode */
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sun4i_usb_phy0_set_id_detect(_phy, 0);
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sun4i_usb_phy0_set_vbus_detect(_phy, 1);
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}
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}
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2014-03-02 01:09:26 +08:00
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return 0;
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}
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|
|
static int sun4i_usb_phy_exit(struct phy *_phy)
|
|
|
|
{
|
|
|
|
struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
|
2015-06-13 20:37:45 +08:00
|
|
|
struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
|
|
|
|
|
|
|
|
if (phy->index == 0) {
|
|
|
|
/* 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;
|
|
|
|
}
|
2014-03-02 01:09:26 +08:00
|
|
|
|
|
|
|
sun4i_usb_phy_passby(phy, 0);
|
|
|
|
reset_control_assert(phy->reset);
|
2014-05-13 23:44:18 +08:00
|
|
|
clk_disable_unprepare(phy->clk);
|
2014-03-02 01:09:26 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-07-31 16:01:41 +08:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2014-03-02 01:09:26 +08:00
|
|
|
static int sun4i_usb_phy_power_on(struct phy *_phy)
|
|
|
|
{
|
|
|
|
struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
|
2015-06-13 20:37:45 +08:00
|
|
|
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 */
|
2015-07-31 16:01:42 +08:00
|
|
|
if (phy->index == 0 && sun4i_usb_phy0_have_vbus_det(data) &&
|
|
|
|
data->vbus_det)
|
2015-06-13 20:37:45 +08:00
|
|
|
return 0;
|
2014-03-02 01:09:26 +08:00
|
|
|
|
2015-06-13 20:37:45 +08:00
|
|
|
ret = regulator_enable(phy->vbus);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2014-03-02 01:09:26 +08:00
|
|
|
|
2015-06-13 20:37:45 +08:00
|
|
|
phy->regulator_on = true;
|
2014-03-02 01:09:26 +08:00
|
|
|
|
2015-06-13 20:37:45 +08:00
|
|
|
/* We must report Vbus high within OTG_TIME_A_WAIT_VRISE msec. */
|
2015-06-13 20:37:50 +08:00
|
|
|
if (phy->index == 0 && data->vbus_det_gpio && data->phy0_poll)
|
2015-06-13 20:37:45 +08:00
|
|
|
mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
|
2014-03-02 01:09:26 +08:00
|
|
|
|
2015-06-13 20:37:45 +08:00
|
|
|
return 0;
|
2014-03-02 01:09:26 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static int sun4i_usb_phy_power_off(struct phy *_phy)
|
|
|
|
{
|
|
|
|
struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
|
2015-06-13 20:37:45 +08:00
|
|
|
struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
|
|
|
|
|
|
|
|
if (!phy->vbus || !phy->regulator_on)
|
|
|
|
return 0;
|
2014-03-02 01:09:26 +08:00
|
|
|
|
2015-06-13 20:37:45 +08:00
|
|
|
regulator_disable(phy->vbus);
|
|
|
|
phy->regulator_on = false;
|
2014-03-02 01:09:26 +08:00
|
|
|
|
2015-06-13 20:37:45 +08:00
|
|
|
/*
|
|
|
|
* phy0 vbus typically slowly discharges, sometimes this causes the
|
|
|
|
* Vbus gpio to not trigger an edge irq on Vbus off, so force a rescan.
|
|
|
|
*/
|
2015-06-13 20:37:50 +08:00
|
|
|
if (phy->index == 0 && data->vbus_det_gpio && !data->phy0_poll)
|
2015-06-13 20:37:45 +08:00
|
|
|
mod_delayed_work(system_wq, &data->detect, POLL_TIME);
|
2014-03-02 01:09:26 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-03-29 18:50:46 +08:00
|
|
|
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);
|
|
|
|
}
|
2015-07-31 16:01:40 +08:00
|
|
|
EXPORT_SYMBOL_GPL(sun4i_usb_phy_set_squelch_detect);
|
2015-03-29 18:50:46 +08:00
|
|
|
|
2015-07-15 15:33:51 +08:00
|
|
|
static const struct phy_ops sun4i_usb_phy_ops = {
|
2014-03-02 01:09:26 +08:00
|
|
|
.init = sun4i_usb_phy_init,
|
|
|
|
.exit = sun4i_usb_phy_exit,
|
|
|
|
.power_on = sun4i_usb_phy_power_on,
|
|
|
|
.power_off = sun4i_usb_phy_power_off,
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
};
|
|
|
|
|
2015-06-13 20:37:45 +08:00
|
|
|
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;
|
2015-06-13 20:37:46 +08:00
|
|
|
int id_det, vbus_det, id_notify = 0, vbus_notify = 0;
|
2015-06-13 20:37:45 +08:00
|
|
|
|
|
|
|
id_det = gpiod_get_value_cansleep(data->id_det_gpio);
|
2015-06-13 20:37:51 +08:00
|
|
|
vbus_det = sun4i_usb_phy0_get_vbus_det(data);
|
2015-06-13 20:37:45 +08:00
|
|
|
|
|
|
|
mutex_lock(&phy0->mutex);
|
|
|
|
|
|
|
|
if (!data->phy0_init) {
|
|
|
|
mutex_unlock(&phy0->mutex);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (id_det != data->id_det) {
|
2015-06-13 20:37:50 +08:00
|
|
|
/*
|
|
|
|
* When a host cable (id == 0) gets plugged in on systems
|
|
|
|
* without vbus detection report vbus low for long enough for
|
|
|
|
* the musb-ip to end the current device session.
|
|
|
|
*/
|
2015-06-13 20:37:51 +08:00
|
|
|
if (!sun4i_usb_phy0_have_vbus_det(data) && id_det == 0) {
|
2015-06-13 20:37:50 +08:00
|
|
|
sun4i_usb_phy0_set_vbus_detect(phy0, 0);
|
|
|
|
msleep(200);
|
|
|
|
sun4i_usb_phy0_set_vbus_detect(phy0, 1);
|
|
|
|
}
|
2015-06-13 20:37:45 +08:00
|
|
|
sun4i_usb_phy0_set_id_detect(phy0, id_det);
|
|
|
|
data->id_det = id_det;
|
2015-06-13 20:37:46 +08:00
|
|
|
id_notify = 1;
|
2015-06-13 20:37:45 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
if (vbus_det != data->vbus_det) {
|
|
|
|
sun4i_usb_phy0_set_vbus_detect(phy0, vbus_det);
|
|
|
|
data->vbus_det = vbus_det;
|
2015-06-13 20:37:46 +08:00
|
|
|
vbus_notify = 1;
|
2015-06-13 20:37:45 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
mutex_unlock(&phy0->mutex);
|
|
|
|
|
2015-06-13 20:37:50 +08:00
|
|
|
if (id_notify) {
|
2015-06-13 20:37:46 +08:00
|
|
|
extcon_set_cable_state_(data->extcon, EXTCON_USB_HOST,
|
|
|
|
!id_det);
|
2015-06-13 20:37:50 +08:00
|
|
|
/*
|
|
|
|
* When a host cable gets unplugged (id == 1) on systems
|
|
|
|
* without vbus detection report vbus low for long enough to
|
|
|
|
* the musb-ip to end the current host session.
|
|
|
|
*/
|
2015-06-13 20:37:51 +08:00
|
|
|
if (!sun4i_usb_phy0_have_vbus_det(data) && id_det == 1) {
|
2015-06-13 20:37:50 +08:00
|
|
|
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);
|
|
|
|
}
|
|
|
|
}
|
2015-06-13 20:37:46 +08:00
|
|
|
|
|
|
|
if (vbus_notify)
|
|
|
|
extcon_set_cable_state_(data->extcon, EXTCON_USB, vbus_det);
|
|
|
|
|
2015-06-13 20:37:45 +08:00
|
|
|
if (data->phy0_poll)
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2015-06-13 20:37:51 +08:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2014-03-02 01:09:26 +08:00
|
|
|
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);
|
|
|
|
|
2015-12-11 23:32:17 +08:00
|
|
|
if (args->args[0] >= data->cfg->num_phys)
|
2014-03-02 01:09:26 +08:00
|
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
|
|
|
|
return data->phys[args->args[0]].phy;
|
|
|
|
}
|
|
|
|
|
2015-06-13 20:37:45 +08:00
|
|
|
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);
|
|
|
|
|
2015-06-13 20:37:51 +08:00
|
|
|
if (data->vbus_power_nb_registered)
|
|
|
|
power_supply_unreg_notifier(&data->vbus_power_nb);
|
2015-06-13 20:37:45 +08:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2015-06-13 20:37:46 +08:00
|
|
|
static const unsigned int sun4i_usb_phy0_cable[] = {
|
|
|
|
EXTCON_USB,
|
|
|
|
EXTCON_USB_HOST,
|
|
|
|
EXTCON_NONE,
|
|
|
|
};
|
|
|
|
|
2014-03-02 01:09:26 +08:00
|
|
|
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;
|
|
|
|
struct resource *res;
|
2015-06-13 20:37:45 +08:00
|
|
|
int i, ret;
|
2014-03-02 01:09:26 +08:00
|
|
|
|
|
|
|
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
|
|
|
|
if (!data)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
mutex_init(&data->mutex);
|
2015-06-13 20:37:45 +08:00
|
|
|
INIT_DELAYED_WORK(&data->detect, sun4i_usb_phy0_id_vbus_det_scan);
|
|
|
|
dev_set_drvdata(dev, data);
|
2015-12-11 23:32:17 +08:00
|
|
|
data->cfg = of_device_get_match_data(dev);
|
|
|
|
if (!data->cfg)
|
|
|
|
return -EINVAL;
|
2015-06-13 20:37:49 +08:00
|
|
|
|
2014-03-02 01:09:26 +08:00
|
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl");
|
|
|
|
data->base = devm_ioremap_resource(dev, res);
|
|
|
|
if (IS_ERR(data->base))
|
|
|
|
return PTR_ERR(data->base);
|
|
|
|
|
2015-09-25 08:47:29 +08:00
|
|
|
data->id_det_gpio = devm_gpiod_get_optional(dev, "usb0_id_det",
|
|
|
|
GPIOD_IN);
|
|
|
|
if (IS_ERR(data->id_det_gpio))
|
|
|
|
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))
|
|
|
|
return PTR_ERR(data->vbus_det_gpio);
|
2015-06-13 20:37:45 +08:00
|
|
|
|
2015-06-13 20:37:51 +08:00
|
|
|
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))
|
|
|
|
return PTR_ERR(data->vbus_power_supply);
|
|
|
|
|
|
|
|
if (!data->vbus_power_supply)
|
|
|
|
return -EPROBE_DEFER;
|
|
|
|
}
|
|
|
|
|
2015-06-13 20:37:50 +08:00
|
|
|
/* vbus_det without id_det makes no sense, and is not supported */
|
2015-06-13 20:37:51 +08:00
|
|
|
if (sun4i_usb_phy0_have_vbus_det(data) && !data->id_det_gpio) {
|
2015-06-13 20:37:50 +08:00
|
|
|
dev_err(dev, "usb0_id_det missing or invalid\n");
|
2015-06-13 20:37:45 +08:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
2015-06-13 20:37:46 +08:00
|
|
|
if (data->id_det_gpio) {
|
|
|
|
data->extcon = devm_extcon_dev_allocate(dev,
|
|
|
|
sun4i_usb_phy0_cable);
|
|
|
|
if (IS_ERR(data->extcon))
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-12-11 23:32:17 +08:00
|
|
|
for (i = 0; i < data->cfg->num_phys; i++) {
|
2014-05-13 23:44:17 +08:00
|
|
|
struct sun4i_usb_phy *phy = data->phys + i;
|
|
|
|
char name[16];
|
|
|
|
|
2014-03-02 01:09:26 +08:00
|
|
|
snprintf(name, sizeof(name), "usb%d_vbus", i);
|
2014-05-13 23:44:17 +08:00
|
|
|
phy->vbus = devm_regulator_get_optional(dev, name);
|
|
|
|
if (IS_ERR(phy->vbus)) {
|
|
|
|
if (PTR_ERR(phy->vbus) == -EPROBE_DEFER)
|
2014-03-02 01:09:26 +08:00
|
|
|
return -EPROBE_DEFER;
|
2014-05-13 23:44:17 +08:00
|
|
|
phy->vbus = NULL;
|
2014-03-02 01:09:26 +08:00
|
|
|
}
|
|
|
|
|
2015-12-11 23:32:17 +08:00
|
|
|
if (data->cfg->dedicated_clocks)
|
2014-05-13 23:44:18 +08:00
|
|
|
snprintf(name, sizeof(name), "usb%d_phy", i);
|
|
|
|
else
|
|
|
|
strlcpy(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);
|
|
|
|
}
|
|
|
|
|
2014-03-02 01:09:26 +08:00
|
|
|
snprintf(name, sizeof(name), "usb%d_reset", i);
|
2014-05-13 23:44:17 +08:00
|
|
|
phy->reset = devm_reset_control_get(dev, name);
|
|
|
|
if (IS_ERR(phy->reset)) {
|
2014-03-02 01:09:26 +08:00
|
|
|
dev_err(dev, "failed to get reset %s\n", name);
|
2014-05-13 23:44:17 +08:00
|
|
|
return PTR_ERR(phy->reset);
|
2014-03-02 01:09:26 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
if (i) { /* No pmu for usbc0 */
|
|
|
|
snprintf(name, sizeof(name), "pmu%d", i);
|
|
|
|
res = platform_get_resource_byname(pdev,
|
|
|
|
IORESOURCE_MEM, name);
|
2014-05-13 23:44:17 +08:00
|
|
|
phy->pmu = devm_ioremap_resource(dev, res);
|
|
|
|
if (IS_ERR(phy->pmu))
|
|
|
|
return PTR_ERR(phy->pmu);
|
2014-03-02 01:09:26 +08:00
|
|
|
}
|
|
|
|
|
2014-11-19 23:28:21 +08:00
|
|
|
phy->phy = devm_phy_create(dev, NULL, &sun4i_usb_phy_ops);
|
2014-05-13 23:44:17 +08:00
|
|
|
if (IS_ERR(phy->phy)) {
|
2014-03-02 01:09:26 +08:00
|
|
|
dev_err(dev, "failed to create PHY %d\n", i);
|
2014-05-13 23:44:17 +08:00
|
|
|
return PTR_ERR(phy->phy);
|
2014-03-02 01:09:26 +08:00
|
|
|
}
|
|
|
|
|
2014-05-13 23:44:17 +08:00
|
|
|
phy->index = i;
|
|
|
|
phy_set_drvdata(phy->phy, &data->phys[i]);
|
2014-03-02 01:09:26 +08:00
|
|
|
}
|
|
|
|
|
2015-06-13 20:37:45 +08:00
|
|
|
data->id_det_irq = gpiod_to_irq(data->id_det_gpio);
|
|
|
|
data->vbus_det_irq = gpiod_to_irq(data->vbus_det_gpio);
|
2015-06-13 20:37:50 +08:00
|
|
|
if ((data->id_det_gpio && data->id_det_irq < 0) ||
|
|
|
|
(data->vbus_det_gpio && data->vbus_det_irq < 0))
|
2015-06-13 20:37:45 +08:00
|
|
|
data->phy0_poll = true;
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-06-13 20:37:51 +08:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2014-03-02 01:09:26 +08:00
|
|
|
phy_provider = devm_of_phy_provider_register(dev, sun4i_usb_phy_xlate);
|
2015-06-13 20:37:45 +08:00
|
|
|
if (IS_ERR(phy_provider)) {
|
|
|
|
sun4i_usb_phy_remove(pdev); /* Stop detect work */
|
|
|
|
return PTR_ERR(phy_provider);
|
|
|
|
}
|
2014-03-02 01:09:26 +08:00
|
|
|
|
2015-06-13 20:37:45 +08:00
|
|
|
return 0;
|
2014-03-02 01:09:26 +08:00
|
|
|
}
|
|
|
|
|
2015-12-11 23:32:17 +08:00
|
|
|
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 = sun4i_a10_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 = sun4i_a10_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,
|
|
|
|
};
|
|
|
|
|
2015-12-11 23:32:18 +08:00
|
|
|
static const struct sun4i_usb_phy_cfg sun8i_h3_cfg = {
|
|
|
|
.num_phys = 4,
|
|
|
|
.type = sun8i_h3_phy,
|
|
|
|
.disc_thresh = 3,
|
|
|
|
.dedicated_clocks = true,
|
|
|
|
};
|
|
|
|
|
2014-03-02 01:09:26 +08:00
|
|
|
static const struct of_device_id sun4i_usb_phy_of_match[] = {
|
2015-12-11 23:32:17 +08:00
|
|
|
{ .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 },
|
2015-12-11 23:32:18 +08:00
|
|
|
{ .compatible = "allwinner,sun8i-h3-usb-phy", .data = &sun8i_h3_cfg },
|
2014-03-02 01:09:26 +08:00
|
|
|
{ },
|
|
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match);
|
|
|
|
|
|
|
|
static struct platform_driver sun4i_usb_phy_driver = {
|
|
|
|
.probe = sun4i_usb_phy_probe,
|
2015-06-13 20:37:45 +08:00
|
|
|
.remove = sun4i_usb_phy_remove,
|
2014-03-02 01:09:26 +08:00
|
|
|
.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 <hdegoede@redhat.com>");
|
|
|
|
MODULE_LICENSE("GPL v2");
|