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1013 lines
26 KiB
1013 lines
26 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* USB transceiver driver for AB8500 family chips |
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* |
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* Copyright (C) 2010-2013 ST-Ericsson AB |
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* Mian Yousaf Kaukab <[email protected]> |
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* Avinash Kumar <[email protected]> |
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* Thirupathi Chippakurthy <[email protected]> |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/usb/otg.h> |
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#include <linux/slab.h> |
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#include <linux/notifier.h> |
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#include <linux/interrupt.h> |
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#include <linux/delay.h> |
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#include <linux/clk.h> |
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#include <linux/err.h> |
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#include <linux/mfd/abx500.h> |
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#include <linux/mfd/abx500/ab8500.h> |
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#include <linux/usb/musb-ux500.h> |
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#include <linux/regulator/consumer.h> |
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#include <linux/pinctrl/consumer.h> |
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|
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/* Bank AB8500_SYS_CTRL2_BLOCK */ |
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#define AB8500_MAIN_WD_CTRL_REG 0x01 |
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|
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/* Bank AB8500_USB */ |
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#define AB8500_USB_LINE_STAT_REG 0x80 |
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#define AB8505_USB_LINE_STAT_REG 0x94 |
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#define AB8500_USB_PHY_CTRL_REG 0x8A |
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|
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/* Bank AB8500_DEVELOPMENT */ |
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#define AB8500_BANK12_ACCESS 0x00 |
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|
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/* Bank AB8500_DEBUG */ |
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#define AB8500_USB_PHY_TUNE1 0x05 |
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#define AB8500_USB_PHY_TUNE2 0x06 |
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#define AB8500_USB_PHY_TUNE3 0x07 |
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|
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/* Bank AB8500_INTERRUPT */ |
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#define AB8500_IT_SOURCE2_REG 0x01 |
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|
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#define AB8500_BIT_OTG_STAT_ID (1 << 0) |
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#define AB8500_BIT_PHY_CTRL_HOST_EN (1 << 0) |
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#define AB8500_BIT_PHY_CTRL_DEVICE_EN (1 << 1) |
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#define AB8500_BIT_WD_CTRL_ENABLE (1 << 0) |
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#define AB8500_BIT_WD_CTRL_KICK (1 << 1) |
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#define AB8500_BIT_SOURCE2_VBUSDET (1 << 7) |
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|
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#define AB8500_WD_KICK_DELAY_US 100 /* usec */ |
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#define AB8500_WD_V11_DISABLE_DELAY_US 100 /* usec */ |
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#define AB8500_V20_31952_DISABLE_DELAY_US 100 /* usec */ |
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|
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/* Usb line status register */ |
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enum ab8500_usb_link_status { |
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USB_LINK_NOT_CONFIGURED_8500 = 0, |
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USB_LINK_STD_HOST_NC_8500, |
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USB_LINK_STD_HOST_C_NS_8500, |
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USB_LINK_STD_HOST_C_S_8500, |
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USB_LINK_HOST_CHG_NM_8500, |
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USB_LINK_HOST_CHG_HS_8500, |
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USB_LINK_HOST_CHG_HS_CHIRP_8500, |
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USB_LINK_DEDICATED_CHG_8500, |
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USB_LINK_ACA_RID_A_8500, |
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USB_LINK_ACA_RID_B_8500, |
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USB_LINK_ACA_RID_C_NM_8500, |
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USB_LINK_ACA_RID_C_HS_8500, |
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USB_LINK_ACA_RID_C_HS_CHIRP_8500, |
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USB_LINK_HM_IDGND_8500, |
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USB_LINK_RESERVED_8500, |
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USB_LINK_NOT_VALID_LINK_8500, |
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}; |
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|
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enum ab8505_usb_link_status { |
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USB_LINK_NOT_CONFIGURED_8505 = 0, |
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USB_LINK_STD_HOST_NC_8505, |
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USB_LINK_STD_HOST_C_NS_8505, |
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USB_LINK_STD_HOST_C_S_8505, |
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USB_LINK_CDP_8505, |
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USB_LINK_RESERVED0_8505, |
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USB_LINK_RESERVED1_8505, |
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USB_LINK_DEDICATED_CHG_8505, |
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USB_LINK_ACA_RID_A_8505, |
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USB_LINK_ACA_RID_B_8505, |
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USB_LINK_ACA_RID_C_NM_8505, |
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USB_LINK_RESERVED2_8505, |
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USB_LINK_RESERVED3_8505, |
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USB_LINK_HM_IDGND_8505, |
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USB_LINK_CHARGERPORT_NOT_OK_8505, |
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USB_LINK_CHARGER_DM_HIGH_8505, |
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USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8505, |
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USB_LINK_STD_UPSTREAM_NO_IDGNG_NO_VBUS_8505, |
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USB_LINK_STD_UPSTREAM_8505, |
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USB_LINK_CHARGER_SE1_8505, |
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USB_LINK_CARKIT_CHGR_1_8505, |
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USB_LINK_CARKIT_CHGR_2_8505, |
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USB_LINK_ACA_DOCK_CHGR_8505, |
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USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_8505, |
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USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_8505, |
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USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8505, |
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USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8505, |
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USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_8505, |
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}; |
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|
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enum ab8500_usb_mode { |
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USB_IDLE = 0, |
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USB_PERIPHERAL, |
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USB_HOST, |
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USB_DEDICATED_CHG, |
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USB_UART |
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}; |
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|
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/* Register USB_LINK_STATUS interrupt */ |
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#define AB8500_USB_FLAG_USE_LINK_STATUS_IRQ (1 << 0) |
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/* Register ID_WAKEUP_F interrupt */ |
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#define AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ (1 << 1) |
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/* Register VBUS_DET_F interrupt */ |
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#define AB8500_USB_FLAG_USE_VBUS_DET_IRQ (1 << 2) |
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/* Driver is using the ab-iddet driver*/ |
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#define AB8500_USB_FLAG_USE_AB_IDDET (1 << 3) |
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/* Enable setting regulators voltage */ |
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#define AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE (1 << 4) |
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|
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struct ab8500_usb { |
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struct usb_phy phy; |
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struct device *dev; |
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struct ab8500 *ab8500; |
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unsigned vbus_draw; |
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struct work_struct phy_dis_work; |
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enum ab8500_usb_mode mode; |
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struct clk *sysclk; |
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struct regulator *v_ape; |
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struct regulator *v_musb; |
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struct regulator *v_ulpi; |
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int saved_v_ulpi; |
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int previous_link_status_state; |
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struct pinctrl *pinctrl; |
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struct pinctrl_state *pins_sleep; |
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bool enabled_charging_detection; |
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unsigned int flags; |
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}; |
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|
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static inline struct ab8500_usb *phy_to_ab(struct usb_phy *x) |
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{ |
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return container_of(x, struct ab8500_usb, phy); |
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} |
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|
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static void ab8500_usb_wd_workaround(struct ab8500_usb *ab) |
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{ |
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abx500_set_register_interruptible(ab->dev, |
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AB8500_SYS_CTRL2_BLOCK, |
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AB8500_MAIN_WD_CTRL_REG, |
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AB8500_BIT_WD_CTRL_ENABLE); |
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udelay(AB8500_WD_KICK_DELAY_US); |
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abx500_set_register_interruptible(ab->dev, |
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AB8500_SYS_CTRL2_BLOCK, |
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AB8500_MAIN_WD_CTRL_REG, |
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(AB8500_BIT_WD_CTRL_ENABLE |
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| AB8500_BIT_WD_CTRL_KICK)); |
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udelay(AB8500_WD_V11_DISABLE_DELAY_US); |
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abx500_set_register_interruptible(ab->dev, |
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AB8500_SYS_CTRL2_BLOCK, |
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AB8500_MAIN_WD_CTRL_REG, |
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0); |
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} |
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|
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static void ab8500_usb_regulator_enable(struct ab8500_usb *ab) |
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{ |
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int ret, volt; |
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|
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ret = regulator_enable(ab->v_ape); |
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if (ret) |
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dev_err(ab->dev, "Failed to enable v-ape\n"); |
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|
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if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) { |
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ab->saved_v_ulpi = regulator_get_voltage(ab->v_ulpi); |
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if (ab->saved_v_ulpi < 0) |
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dev_err(ab->dev, "Failed to get v_ulpi voltage\n"); |
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|
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ret = regulator_set_voltage(ab->v_ulpi, 1300000, 1350000); |
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if (ret < 0) |
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dev_err(ab->dev, "Failed to set the Vintcore to 1.3V, ret=%d\n", |
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ret); |
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|
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ret = regulator_set_load(ab->v_ulpi, 28000); |
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if (ret < 0) |
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dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n", |
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ret); |
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} |
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|
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ret = regulator_enable(ab->v_ulpi); |
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if (ret) |
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dev_err(ab->dev, "Failed to enable vddulpivio18\n"); |
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|
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if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) { |
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volt = regulator_get_voltage(ab->v_ulpi); |
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if ((volt != 1300000) && (volt != 1350000)) |
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dev_err(ab->dev, "Vintcore is not set to 1.3V volt=%d\n", |
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volt); |
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} |
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|
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ret = regulator_enable(ab->v_musb); |
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if (ret) |
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dev_err(ab->dev, "Failed to enable musb_1v8\n"); |
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} |
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|
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static void ab8500_usb_regulator_disable(struct ab8500_usb *ab) |
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{ |
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int ret; |
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regulator_disable(ab->v_musb); |
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regulator_disable(ab->v_ulpi); |
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|
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/* USB is not the only consumer of Vintcore, restore old settings */ |
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if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) { |
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if (ab->saved_v_ulpi > 0) { |
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ret = regulator_set_voltage(ab->v_ulpi, |
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ab->saved_v_ulpi, ab->saved_v_ulpi); |
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if (ret < 0) |
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dev_err(ab->dev, "Failed to set the Vintcore to %duV, ret=%d\n", |
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ab->saved_v_ulpi, ret); |
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} |
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|
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ret = regulator_set_load(ab->v_ulpi, 0); |
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if (ret < 0) |
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dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n", |
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ret); |
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} |
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|
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regulator_disable(ab->v_ape); |
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} |
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|
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static void ab8500_usb_wd_linkstatus(struct ab8500_usb *ab, u8 bit) |
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{ |
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/* Workaround for v2.0 bug # 31952 */ |
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if (is_ab8500_2p0(ab->ab8500)) { |
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abx500_mask_and_set_register_interruptible(ab->dev, |
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AB8500_USB, AB8500_USB_PHY_CTRL_REG, |
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bit, bit); |
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udelay(AB8500_V20_31952_DISABLE_DELAY_US); |
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} |
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} |
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static void ab8500_usb_phy_enable(struct ab8500_usb *ab, bool sel_host) |
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{ |
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u8 bit; |
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bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN : |
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AB8500_BIT_PHY_CTRL_DEVICE_EN; |
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|
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/* mux and configure USB pins to DEFAULT state */ |
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ab->pinctrl = pinctrl_get_select(ab->dev, PINCTRL_STATE_DEFAULT); |
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if (IS_ERR(ab->pinctrl)) |
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dev_err(ab->dev, "could not get/set default pinstate\n"); |
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|
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if (clk_prepare_enable(ab->sysclk)) |
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dev_err(ab->dev, "can't prepare/enable clock\n"); |
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ab8500_usb_regulator_enable(ab); |
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abx500_mask_and_set_register_interruptible(ab->dev, |
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AB8500_USB, AB8500_USB_PHY_CTRL_REG, |
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bit, bit); |
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} |
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static void ab8500_usb_phy_disable(struct ab8500_usb *ab, bool sel_host) |
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{ |
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u8 bit; |
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bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN : |
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AB8500_BIT_PHY_CTRL_DEVICE_EN; |
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ab8500_usb_wd_linkstatus(ab, bit); |
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abx500_mask_and_set_register_interruptible(ab->dev, |
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AB8500_USB, AB8500_USB_PHY_CTRL_REG, |
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bit, 0); |
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/* Needed to disable the phy.*/ |
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ab8500_usb_wd_workaround(ab); |
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clk_disable_unprepare(ab->sysclk); |
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ab8500_usb_regulator_disable(ab); |
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if (!IS_ERR(ab->pinctrl)) { |
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/* configure USB pins to SLEEP state */ |
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ab->pins_sleep = pinctrl_lookup_state(ab->pinctrl, |
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PINCTRL_STATE_SLEEP); |
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|
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if (IS_ERR(ab->pins_sleep)) |
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dev_dbg(ab->dev, "could not get sleep pinstate\n"); |
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else if (pinctrl_select_state(ab->pinctrl, ab->pins_sleep)) |
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dev_err(ab->dev, "could not set pins to sleep state\n"); |
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|
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/* |
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* as USB pins are shared with iddet, release them to allow |
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* iddet to request them |
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*/ |
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pinctrl_put(ab->pinctrl); |
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} |
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} |
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|
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#define ab8500_usb_host_phy_en(ab) ab8500_usb_phy_enable(ab, true) |
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#define ab8500_usb_host_phy_dis(ab) ab8500_usb_phy_disable(ab, true) |
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#define ab8500_usb_peri_phy_en(ab) ab8500_usb_phy_enable(ab, false) |
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#define ab8500_usb_peri_phy_dis(ab) ab8500_usb_phy_disable(ab, false) |
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|
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static int ab8505_usb_link_status_update(struct ab8500_usb *ab, |
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enum ab8505_usb_link_status lsts) |
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{ |
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enum ux500_musb_vbus_id_status event = 0; |
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|
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dev_dbg(ab->dev, "ab8505_usb_link_status_update %d\n", lsts); |
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|
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/* |
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* Spurious link_status interrupts are seen at the time of |
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* disconnection of a device in RIDA state |
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*/ |
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if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8505 && |
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(lsts == USB_LINK_STD_HOST_NC_8505)) |
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return 0; |
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|
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ab->previous_link_status_state = lsts; |
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|
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switch (lsts) { |
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case USB_LINK_ACA_RID_B_8505: |
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event = UX500_MUSB_RIDB; |
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fallthrough; |
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case USB_LINK_NOT_CONFIGURED_8505: |
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case USB_LINK_RESERVED0_8505: |
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case USB_LINK_RESERVED1_8505: |
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case USB_LINK_RESERVED2_8505: |
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case USB_LINK_RESERVED3_8505: |
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ab->mode = USB_IDLE; |
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ab->phy.otg->default_a = false; |
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ab->vbus_draw = 0; |
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if (event != UX500_MUSB_RIDB) |
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event = UX500_MUSB_NONE; |
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/* |
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* Fallback to default B_IDLE as nothing |
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* is connected |
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*/ |
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ab->phy.otg->state = OTG_STATE_B_IDLE; |
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usb_phy_set_event(&ab->phy, USB_EVENT_NONE); |
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break; |
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|
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case USB_LINK_ACA_RID_C_NM_8505: |
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event = UX500_MUSB_RIDC; |
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fallthrough; |
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case USB_LINK_STD_HOST_NC_8505: |
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case USB_LINK_STD_HOST_C_NS_8505: |
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case USB_LINK_STD_HOST_C_S_8505: |
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case USB_LINK_CDP_8505: |
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if (ab->mode == USB_IDLE) { |
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ab->mode = USB_PERIPHERAL; |
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ab8500_usb_peri_phy_en(ab); |
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atomic_notifier_call_chain(&ab->phy.notifier, |
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UX500_MUSB_PREPARE, &ab->vbus_draw); |
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usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED); |
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} |
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if (event != UX500_MUSB_RIDC) |
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event = UX500_MUSB_VBUS; |
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break; |
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|
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case USB_LINK_ACA_RID_A_8505: |
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case USB_LINK_ACA_DOCK_CHGR_8505: |
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event = UX500_MUSB_RIDA; |
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fallthrough; |
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case USB_LINK_HM_IDGND_8505: |
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if (ab->mode == USB_IDLE) { |
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ab->mode = USB_HOST; |
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ab8500_usb_host_phy_en(ab); |
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atomic_notifier_call_chain(&ab->phy.notifier, |
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UX500_MUSB_PREPARE, &ab->vbus_draw); |
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} |
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ab->phy.otg->default_a = true; |
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if (event != UX500_MUSB_RIDA) |
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event = UX500_MUSB_ID; |
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atomic_notifier_call_chain(&ab->phy.notifier, |
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event, &ab->vbus_draw); |
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break; |
|
|
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case USB_LINK_DEDICATED_CHG_8505: |
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ab->mode = USB_DEDICATED_CHG; |
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event = UX500_MUSB_CHARGER; |
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atomic_notifier_call_chain(&ab->phy.notifier, |
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event, &ab->vbus_draw); |
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usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER); |
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break; |
|
|
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/* |
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* FIXME: For now we rely on the boot firmware to set up the necessary |
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* PHY/pin configuration for UART mode. |
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* |
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* AB8505 does not seem to report any status change for UART cables, |
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* possibly because it cannot detect them autonomously. |
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* We may need to measure the ID resistance manually to reliably |
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* detect UART cables after bootup. |
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*/ |
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case USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8505: |
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case USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8505: |
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if (ab->mode == USB_IDLE) { |
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ab->mode = USB_UART; |
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ab8500_usb_peri_phy_en(ab); |
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} |
|
|
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break; |
|
|
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default: |
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break; |
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} |
|
|
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return 0; |
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} |
|
|
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static int ab8500_usb_link_status_update(struct ab8500_usb *ab, |
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enum ab8500_usb_link_status lsts) |
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{ |
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enum ux500_musb_vbus_id_status event = 0; |
|
|
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dev_dbg(ab->dev, "ab8500_usb_link_status_update %d\n", lsts); |
|
|
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/* |
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* Spurious link_status interrupts are seen in case of a |
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* disconnection of a device in IDGND and RIDA stage |
|
*/ |
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if (ab->previous_link_status_state == USB_LINK_HM_IDGND_8500 && |
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(lsts == USB_LINK_STD_HOST_C_NS_8500 || |
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lsts == USB_LINK_STD_HOST_NC_8500)) |
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return 0; |
|
|
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if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8500 && |
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lsts == USB_LINK_STD_HOST_NC_8500) |
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return 0; |
|
|
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ab->previous_link_status_state = lsts; |
|
|
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switch (lsts) { |
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case USB_LINK_ACA_RID_B_8500: |
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event = UX500_MUSB_RIDB; |
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fallthrough; |
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case USB_LINK_NOT_CONFIGURED_8500: |
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case USB_LINK_NOT_VALID_LINK_8500: |
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ab->mode = USB_IDLE; |
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ab->phy.otg->default_a = false; |
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ab->vbus_draw = 0; |
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if (event != UX500_MUSB_RIDB) |
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event = UX500_MUSB_NONE; |
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/* Fallback to default B_IDLE as nothing is connected */ |
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ab->phy.otg->state = OTG_STATE_B_IDLE; |
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usb_phy_set_event(&ab->phy, USB_EVENT_NONE); |
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break; |
|
|
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case USB_LINK_ACA_RID_C_NM_8500: |
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case USB_LINK_ACA_RID_C_HS_8500: |
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case USB_LINK_ACA_RID_C_HS_CHIRP_8500: |
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event = UX500_MUSB_RIDC; |
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fallthrough; |
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case USB_LINK_STD_HOST_NC_8500: |
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case USB_LINK_STD_HOST_C_NS_8500: |
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case USB_LINK_STD_HOST_C_S_8500: |
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case USB_LINK_HOST_CHG_NM_8500: |
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case USB_LINK_HOST_CHG_HS_8500: |
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case USB_LINK_HOST_CHG_HS_CHIRP_8500: |
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if (ab->mode == USB_IDLE) { |
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ab->mode = USB_PERIPHERAL; |
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ab8500_usb_peri_phy_en(ab); |
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atomic_notifier_call_chain(&ab->phy.notifier, |
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UX500_MUSB_PREPARE, &ab->vbus_draw); |
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usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED); |
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} |
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if (event != UX500_MUSB_RIDC) |
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event = UX500_MUSB_VBUS; |
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break; |
|
|
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case USB_LINK_ACA_RID_A_8500: |
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event = UX500_MUSB_RIDA; |
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fallthrough; |
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case USB_LINK_HM_IDGND_8500: |
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if (ab->mode == USB_IDLE) { |
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ab->mode = USB_HOST; |
|
ab8500_usb_host_phy_en(ab); |
|
atomic_notifier_call_chain(&ab->phy.notifier, |
|
UX500_MUSB_PREPARE, &ab->vbus_draw); |
|
} |
|
ab->phy.otg->default_a = true; |
|
if (event != UX500_MUSB_RIDA) |
|
event = UX500_MUSB_ID; |
|
atomic_notifier_call_chain(&ab->phy.notifier, |
|
event, &ab->vbus_draw); |
|
break; |
|
|
|
case USB_LINK_DEDICATED_CHG_8500: |
|
ab->mode = USB_DEDICATED_CHG; |
|
event = UX500_MUSB_CHARGER; |
|
atomic_notifier_call_chain(&ab->phy.notifier, |
|
event, &ab->vbus_draw); |
|
usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER); |
|
break; |
|
|
|
case USB_LINK_RESERVED_8500: |
|
break; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Connection Sequence: |
|
* 1. Link Status Interrupt |
|
* 2. Enable AB clock |
|
* 3. Enable AB regulators |
|
* 4. Enable USB phy |
|
* 5. Reset the musb controller |
|
* 6. Switch the ULPI GPIO pins to function mode |
|
* 7. Enable the musb Peripheral5 clock |
|
* 8. Restore MUSB context |
|
*/ |
|
static int abx500_usb_link_status_update(struct ab8500_usb *ab) |
|
{ |
|
u8 reg; |
|
int ret = 0; |
|
|
|
if (is_ab8500(ab->ab8500)) { |
|
enum ab8500_usb_link_status lsts; |
|
|
|
ret = abx500_get_register_interruptible(ab->dev, |
|
AB8500_USB, AB8500_USB_LINE_STAT_REG, ®); |
|
if (ret < 0) |
|
return ret; |
|
lsts = (reg >> 3) & 0x0F; |
|
ret = ab8500_usb_link_status_update(ab, lsts); |
|
} else if (is_ab8505(ab->ab8500)) { |
|
enum ab8505_usb_link_status lsts; |
|
|
|
ret = abx500_get_register_interruptible(ab->dev, |
|
AB8500_USB, AB8505_USB_LINE_STAT_REG, ®); |
|
if (ret < 0) |
|
return ret; |
|
lsts = (reg >> 3) & 0x1F; |
|
ret = ab8505_usb_link_status_update(ab, lsts); |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
/* |
|
* Disconnection Sequence: |
|
* 1. Disconnect Interrupt |
|
* 2. Disable regulators |
|
* 3. Disable AB clock |
|
* 4. Disable the Phy |
|
* 5. Link Status Interrupt |
|
* 6. Disable Musb Clock |
|
*/ |
|
static irqreturn_t ab8500_usb_disconnect_irq(int irq, void *data) |
|
{ |
|
struct ab8500_usb *ab = (struct ab8500_usb *) data; |
|
enum usb_phy_events event = USB_EVENT_NONE; |
|
|
|
/* Link status will not be updated till phy is disabled. */ |
|
if (ab->mode == USB_HOST) { |
|
ab->phy.otg->default_a = false; |
|
ab->vbus_draw = 0; |
|
atomic_notifier_call_chain(&ab->phy.notifier, |
|
event, &ab->vbus_draw); |
|
ab8500_usb_host_phy_dis(ab); |
|
ab->mode = USB_IDLE; |
|
} |
|
|
|
if (ab->mode == USB_PERIPHERAL) { |
|
atomic_notifier_call_chain(&ab->phy.notifier, |
|
event, &ab->vbus_draw); |
|
ab8500_usb_peri_phy_dis(ab); |
|
atomic_notifier_call_chain(&ab->phy.notifier, |
|
UX500_MUSB_CLEAN, &ab->vbus_draw); |
|
ab->mode = USB_IDLE; |
|
ab->phy.otg->default_a = false; |
|
ab->vbus_draw = 0; |
|
} |
|
|
|
if (ab->mode == USB_UART) { |
|
ab8500_usb_peri_phy_dis(ab); |
|
ab->mode = USB_IDLE; |
|
} |
|
|
|
if (is_ab8500_2p0(ab->ab8500)) { |
|
if (ab->mode == USB_DEDICATED_CHG) { |
|
ab8500_usb_wd_linkstatus(ab, |
|
AB8500_BIT_PHY_CTRL_DEVICE_EN); |
|
abx500_mask_and_set_register_interruptible(ab->dev, |
|
AB8500_USB, AB8500_USB_PHY_CTRL_REG, |
|
AB8500_BIT_PHY_CTRL_DEVICE_EN, 0); |
|
} |
|
} |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static irqreturn_t ab8500_usb_link_status_irq(int irq, void *data) |
|
{ |
|
struct ab8500_usb *ab = (struct ab8500_usb *)data; |
|
|
|
abx500_usb_link_status_update(ab); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static void ab8500_usb_phy_disable_work(struct work_struct *work) |
|
{ |
|
struct ab8500_usb *ab = container_of(work, struct ab8500_usb, |
|
phy_dis_work); |
|
|
|
if (!ab->phy.otg->host) |
|
ab8500_usb_host_phy_dis(ab); |
|
|
|
if (!ab->phy.otg->gadget) |
|
ab8500_usb_peri_phy_dis(ab); |
|
} |
|
|
|
static int ab8500_usb_set_suspend(struct usb_phy *x, int suspend) |
|
{ |
|
/* TODO */ |
|
return 0; |
|
} |
|
|
|
static int ab8500_usb_set_peripheral(struct usb_otg *otg, |
|
struct usb_gadget *gadget) |
|
{ |
|
struct ab8500_usb *ab; |
|
|
|
if (!otg) |
|
return -ENODEV; |
|
|
|
ab = phy_to_ab(otg->usb_phy); |
|
|
|
ab->phy.otg->gadget = gadget; |
|
|
|
/* Some drivers call this function in atomic context. |
|
* Do not update ab8500 registers directly till this |
|
* is fixed. |
|
*/ |
|
|
|
if ((ab->mode != USB_IDLE) && !gadget) { |
|
ab->mode = USB_IDLE; |
|
schedule_work(&ab->phy_dis_work); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int ab8500_usb_set_host(struct usb_otg *otg, struct usb_bus *host) |
|
{ |
|
struct ab8500_usb *ab; |
|
|
|
if (!otg) |
|
return -ENODEV; |
|
|
|
ab = phy_to_ab(otg->usb_phy); |
|
|
|
ab->phy.otg->host = host; |
|
|
|
/* Some drivers call this function in atomic context. |
|
* Do not update ab8500 registers directly till this |
|
* is fixed. |
|
*/ |
|
|
|
if ((ab->mode != USB_IDLE) && !host) { |
|
ab->mode = USB_IDLE; |
|
schedule_work(&ab->phy_dis_work); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void ab8500_usb_restart_phy(struct ab8500_usb *ab) |
|
{ |
|
abx500_mask_and_set_register_interruptible(ab->dev, |
|
AB8500_USB, AB8500_USB_PHY_CTRL_REG, |
|
AB8500_BIT_PHY_CTRL_DEVICE_EN, |
|
AB8500_BIT_PHY_CTRL_DEVICE_EN); |
|
|
|
udelay(100); |
|
|
|
abx500_mask_and_set_register_interruptible(ab->dev, |
|
AB8500_USB, AB8500_USB_PHY_CTRL_REG, |
|
AB8500_BIT_PHY_CTRL_DEVICE_EN, |
|
0); |
|
|
|
abx500_mask_and_set_register_interruptible(ab->dev, |
|
AB8500_USB, AB8500_USB_PHY_CTRL_REG, |
|
AB8500_BIT_PHY_CTRL_HOST_EN, |
|
AB8500_BIT_PHY_CTRL_HOST_EN); |
|
|
|
udelay(100); |
|
|
|
abx500_mask_and_set_register_interruptible(ab->dev, |
|
AB8500_USB, AB8500_USB_PHY_CTRL_REG, |
|
AB8500_BIT_PHY_CTRL_HOST_EN, |
|
0); |
|
} |
|
|
|
static int ab8500_usb_regulator_get(struct ab8500_usb *ab) |
|
{ |
|
int err; |
|
|
|
ab->v_ape = devm_regulator_get(ab->dev, "v-ape"); |
|
if (IS_ERR(ab->v_ape)) { |
|
dev_err(ab->dev, "Could not get v-ape supply\n"); |
|
err = PTR_ERR(ab->v_ape); |
|
return err; |
|
} |
|
|
|
ab->v_ulpi = devm_regulator_get(ab->dev, "vddulpivio18"); |
|
if (IS_ERR(ab->v_ulpi)) { |
|
dev_err(ab->dev, "Could not get vddulpivio18 supply\n"); |
|
err = PTR_ERR(ab->v_ulpi); |
|
return err; |
|
} |
|
|
|
ab->v_musb = devm_regulator_get(ab->dev, "musb_1v8"); |
|
if (IS_ERR(ab->v_musb)) { |
|
dev_err(ab->dev, "Could not get musb_1v8 supply\n"); |
|
err = PTR_ERR(ab->v_musb); |
|
return err; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int ab8500_usb_irq_setup(struct platform_device *pdev, |
|
struct ab8500_usb *ab) |
|
{ |
|
int err; |
|
int irq; |
|
|
|
if (ab->flags & AB8500_USB_FLAG_USE_LINK_STATUS_IRQ) { |
|
irq = platform_get_irq_byname(pdev, "USB_LINK_STATUS"); |
|
if (irq < 0) |
|
return irq; |
|
err = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
|
ab8500_usb_link_status_irq, |
|
IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT, |
|
"usb-link-status", ab); |
|
if (err < 0) { |
|
dev_err(ab->dev, "request_irq failed for link status irq\n"); |
|
return err; |
|
} |
|
} |
|
|
|
if (ab->flags & AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ) { |
|
irq = platform_get_irq_byname(pdev, "ID_WAKEUP_F"); |
|
if (irq < 0) |
|
return irq; |
|
err = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
|
ab8500_usb_disconnect_irq, |
|
IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT, |
|
"usb-id-fall", ab); |
|
if (err < 0) { |
|
dev_err(ab->dev, "request_irq failed for ID fall irq\n"); |
|
return err; |
|
} |
|
} |
|
|
|
if (ab->flags & AB8500_USB_FLAG_USE_VBUS_DET_IRQ) { |
|
irq = platform_get_irq_byname(pdev, "VBUS_DET_F"); |
|
if (irq < 0) |
|
return irq; |
|
err = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
|
ab8500_usb_disconnect_irq, |
|
IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT, |
|
"usb-vbus-fall", ab); |
|
if (err < 0) { |
|
dev_err(ab->dev, "request_irq failed for Vbus fall irq\n"); |
|
return err; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void ab8500_usb_set_ab8500_tuning_values(struct ab8500_usb *ab) |
|
{ |
|
int err; |
|
|
|
/* Enable the PBT/Bank 0x12 access */ |
|
err = abx500_set_register_interruptible(ab->dev, |
|
AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01); |
|
if (err < 0) |
|
dev_err(ab->dev, "Failed to enable bank12 access err=%d\n", |
|
err); |
|
|
|
err = abx500_set_register_interruptible(ab->dev, |
|
AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8); |
|
if (err < 0) |
|
dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n", |
|
err); |
|
|
|
err = abx500_set_register_interruptible(ab->dev, |
|
AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x00); |
|
if (err < 0) |
|
dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n", |
|
err); |
|
|
|
err = abx500_set_register_interruptible(ab->dev, |
|
AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x78); |
|
if (err < 0) |
|
dev_err(ab->dev, "Failed to set PHY_TUNE3 register err=%d\n", |
|
err); |
|
|
|
/* Switch to normal mode/disable Bank 0x12 access */ |
|
err = abx500_set_register_interruptible(ab->dev, |
|
AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00); |
|
if (err < 0) |
|
dev_err(ab->dev, "Failed to switch bank12 access err=%d\n", |
|
err); |
|
} |
|
|
|
static void ab8500_usb_set_ab8505_tuning_values(struct ab8500_usb *ab) |
|
{ |
|
int err; |
|
|
|
/* Enable the PBT/Bank 0x12 access */ |
|
err = abx500_mask_and_set_register_interruptible(ab->dev, |
|
AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, |
|
0x01, 0x01); |
|
if (err < 0) |
|
dev_err(ab->dev, "Failed to enable bank12 access err=%d\n", |
|
err); |
|
|
|
err = abx500_mask_and_set_register_interruptible(ab->dev, |
|
AB8500_DEBUG, AB8500_USB_PHY_TUNE1, |
|
0xC8, 0xC8); |
|
if (err < 0) |
|
dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n", |
|
err); |
|
|
|
err = abx500_mask_and_set_register_interruptible(ab->dev, |
|
AB8500_DEBUG, AB8500_USB_PHY_TUNE2, |
|
0x60, 0x60); |
|
if (err < 0) |
|
dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n", |
|
err); |
|
|
|
err = abx500_mask_and_set_register_interruptible(ab->dev, |
|
AB8500_DEBUG, AB8500_USB_PHY_TUNE3, |
|
0xFC, 0x80); |
|
|
|
if (err < 0) |
|
dev_err(ab->dev, "Failed to set PHY_TUNE3 register err=%d\n", |
|
err); |
|
|
|
/* Switch to normal mode/disable Bank 0x12 access */ |
|
err = abx500_mask_and_set_register_interruptible(ab->dev, |
|
AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, |
|
0x00, 0x00); |
|
if (err < 0) |
|
dev_err(ab->dev, "Failed to switch bank12 access err=%d\n", |
|
err); |
|
} |
|
|
|
static int ab8500_usb_probe(struct platform_device *pdev) |
|
{ |
|
struct ab8500_usb *ab; |
|
struct ab8500 *ab8500; |
|
struct usb_otg *otg; |
|
int err; |
|
int rev; |
|
|
|
ab8500 = dev_get_drvdata(pdev->dev.parent); |
|
rev = abx500_get_chip_id(&pdev->dev); |
|
|
|
if (is_ab8500_1p1_or_earlier(ab8500)) { |
|
dev_err(&pdev->dev, "Unsupported AB8500 chip rev=%d\n", rev); |
|
return -ENODEV; |
|
} |
|
|
|
ab = devm_kzalloc(&pdev->dev, sizeof(*ab), GFP_KERNEL); |
|
if (!ab) |
|
return -ENOMEM; |
|
|
|
otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL); |
|
if (!otg) |
|
return -ENOMEM; |
|
|
|
ab->dev = &pdev->dev; |
|
ab->ab8500 = ab8500; |
|
ab->phy.dev = ab->dev; |
|
ab->phy.otg = otg; |
|
ab->phy.label = "ab8500"; |
|
ab->phy.set_suspend = ab8500_usb_set_suspend; |
|
ab->phy.otg->state = OTG_STATE_UNDEFINED; |
|
|
|
otg->usb_phy = &ab->phy; |
|
otg->set_host = ab8500_usb_set_host; |
|
otg->set_peripheral = ab8500_usb_set_peripheral; |
|
|
|
if (is_ab8500(ab->ab8500)) { |
|
ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ | |
|
AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ | |
|
AB8500_USB_FLAG_USE_VBUS_DET_IRQ | |
|
AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE; |
|
} else if (is_ab8505(ab->ab8500)) { |
|
ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ | |
|
AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ | |
|
AB8500_USB_FLAG_USE_VBUS_DET_IRQ | |
|
AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE; |
|
} |
|
|
|
/* Disable regulator voltage setting for AB8500 <= v2.0 */ |
|
if (is_ab8500_2p0_or_earlier(ab->ab8500)) |
|
ab->flags &= ~AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE; |
|
|
|
platform_set_drvdata(pdev, ab); |
|
|
|
/* all: Disable phy when called from set_host and set_peripheral */ |
|
INIT_WORK(&ab->phy_dis_work, ab8500_usb_phy_disable_work); |
|
|
|
err = ab8500_usb_regulator_get(ab); |
|
if (err) |
|
return err; |
|
|
|
ab->sysclk = devm_clk_get(ab->dev, "sysclk"); |
|
if (IS_ERR(ab->sysclk)) { |
|
dev_err(ab->dev, "Could not get sysclk.\n"); |
|
return PTR_ERR(ab->sysclk); |
|
} |
|
|
|
err = ab8500_usb_irq_setup(pdev, ab); |
|
if (err < 0) |
|
return err; |
|
|
|
err = usb_add_phy(&ab->phy, USB_PHY_TYPE_USB2); |
|
if (err) { |
|
dev_err(&pdev->dev, "Can't register transceiver\n"); |
|
return err; |
|
} |
|
|
|
if (is_ab8500(ab->ab8500) && !is_ab8500_2p0_or_earlier(ab->ab8500)) |
|
/* Phy tuning values for AB8500 > v2.0 */ |
|
ab8500_usb_set_ab8500_tuning_values(ab); |
|
else if (is_ab8505(ab->ab8500)) |
|
/* Phy tuning values for AB8505 */ |
|
ab8500_usb_set_ab8505_tuning_values(ab); |
|
|
|
/* Needed to enable ID detection. */ |
|
ab8500_usb_wd_workaround(ab); |
|
|
|
/* |
|
* This is required for usb-link-status to work properly when a |
|
* cable is connected at boot time. |
|
*/ |
|
ab8500_usb_restart_phy(ab); |
|
|
|
abx500_usb_link_status_update(ab); |
|
|
|
dev_info(&pdev->dev, "revision 0x%2x driver initialized\n", rev); |
|
|
|
return 0; |
|
} |
|
|
|
static int ab8500_usb_remove(struct platform_device *pdev) |
|
{ |
|
struct ab8500_usb *ab = platform_get_drvdata(pdev); |
|
|
|
cancel_work_sync(&ab->phy_dis_work); |
|
|
|
usb_remove_phy(&ab->phy); |
|
|
|
if (ab->mode == USB_HOST) |
|
ab8500_usb_host_phy_dis(ab); |
|
else if (ab->mode == USB_PERIPHERAL) |
|
ab8500_usb_peri_phy_dis(ab); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct platform_device_id ab8500_usb_devtype[] = { |
|
{ .name = "ab8500-usb", }, |
|
{ /* sentinel */ } |
|
}; |
|
MODULE_DEVICE_TABLE(platform, ab8500_usb_devtype); |
|
|
|
static struct platform_driver ab8500_usb_driver = { |
|
.probe = ab8500_usb_probe, |
|
.remove = ab8500_usb_remove, |
|
.id_table = ab8500_usb_devtype, |
|
.driver = { |
|
.name = "abx5x0-usb", |
|
}, |
|
}; |
|
|
|
static int __init ab8500_usb_init(void) |
|
{ |
|
return platform_driver_register(&ab8500_usb_driver); |
|
} |
|
subsys_initcall(ab8500_usb_init); |
|
|
|
static void __exit ab8500_usb_exit(void) |
|
{ |
|
platform_driver_unregister(&ab8500_usb_driver); |
|
} |
|
module_exit(ab8500_usb_exit); |
|
|
|
MODULE_AUTHOR("ST-Ericsson AB"); |
|
MODULE_DESCRIPTION("AB8500 family usb transceiver driver"); |
|
MODULE_LICENSE("GPL");
|
|
|