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f5f875b561
Fix typo/spello of "function". Cc: Felipe Balbi <balbi@kernel.org> Cc: Jiri Kosina <trivial@kernel.org> Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Link: https://lore.kernel.org/r/1be7e71f-6b79-290a-f38e-b51ccaf85e8e@infradead.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1014 lines
26 KiB
C
1014 lines
26 KiB
C
// 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 <mian.yousaf.kaukab@stericsson.com>
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* Avinash Kumar <avinash.kumar@stericsson.com>
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* Thirupathi Chippakurthy <thirupathi.chippakurthy@stericsson.com>
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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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/* Bank AB8500_SYS_CTRL2_BLOCK */
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#define AB8500_MAIN_WD_CTRL_REG 0x01
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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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/* Bank AB8500_DEVELOPMENT */
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#define AB8500_BANK12_ACCESS 0x00
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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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/* Bank AB8500_INTERRUPT */
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#define AB8500_IT_SOURCE2_REG 0x01
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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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#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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/* 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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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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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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/* 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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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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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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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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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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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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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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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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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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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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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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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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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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/* 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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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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regulator_disable(ab->v_ape);
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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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/* 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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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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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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* 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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#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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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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dev_dbg(ab->dev, "ab8505_usb_link_status_update %d\n", lsts);
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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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ab->previous_link_status_state = lsts;
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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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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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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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*/
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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;
|
|
|
|
if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8500 &&
|
|
lsts == USB_LINK_STD_HOST_NC_8500)
|
|
return 0;
|
|
|
|
ab->previous_link_status_state = lsts;
|
|
|
|
switch (lsts) {
|
|
case USB_LINK_ACA_RID_B_8500:
|
|
event = UX500_MUSB_RIDB;
|
|
fallthrough;
|
|
case USB_LINK_NOT_CONFIGURED_8500:
|
|
case USB_LINK_NOT_VALID_LINK_8500:
|
|
ab->mode = USB_IDLE;
|
|
ab->phy.otg->default_a = false;
|
|
ab->vbus_draw = 0;
|
|
if (event != UX500_MUSB_RIDB)
|
|
event = UX500_MUSB_NONE;
|
|
/* Fallback to default B_IDLE as nothing is connected */
|
|
ab->phy.otg->state = OTG_STATE_B_IDLE;
|
|
usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
|
|
break;
|
|
|
|
case USB_LINK_ACA_RID_C_NM_8500:
|
|
case USB_LINK_ACA_RID_C_HS_8500:
|
|
case USB_LINK_ACA_RID_C_HS_CHIRP_8500:
|
|
event = UX500_MUSB_RIDC;
|
|
fallthrough;
|
|
case USB_LINK_STD_HOST_NC_8500:
|
|
case USB_LINK_STD_HOST_C_NS_8500:
|
|
case USB_LINK_STD_HOST_C_S_8500:
|
|
case USB_LINK_HOST_CHG_NM_8500:
|
|
case USB_LINK_HOST_CHG_HS_8500:
|
|
case USB_LINK_HOST_CHG_HS_CHIRP_8500:
|
|
if (ab->mode == USB_IDLE) {
|
|
ab->mode = USB_PERIPHERAL;
|
|
ab8500_usb_peri_phy_en(ab);
|
|
atomic_notifier_call_chain(&ab->phy.notifier,
|
|
UX500_MUSB_PREPARE, &ab->vbus_draw);
|
|
usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
|
|
}
|
|
if (event != UX500_MUSB_RIDC)
|
|
event = UX500_MUSB_VBUS;
|
|
break;
|
|
|
|
case USB_LINK_ACA_RID_A_8500:
|
|
event = UX500_MUSB_RIDA;
|
|
fallthrough;
|
|
case USB_LINK_HM_IDGND_8500:
|
|
if (ab->mode == USB_IDLE) {
|
|
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");
|