| /* |
| * drivers/usb/otg/ab8500_usb.c |
| * |
| * USB transceiver driver for AB8500 family chips |
| * |
| * Copyright (C) 2010-2013 ST-Ericsson AB |
| * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com> |
| * Avinash Kumar <avinash.kumar@stericsson.com> |
| * Thirupathi Chippakurthy <thirupathi.chippakurthy@stericsson.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/usb/otg.h> |
| #include <linux/slab.h> |
| #include <linux/notifier.h> |
| #include <linux/interrupt.h> |
| #include <linux/delay.h> |
| #include <linux/clk.h> |
| #include <linux/err.h> |
| #include <linux/mfd/abx500.h> |
| #include <linux/mfd/abx500/ab8500.h> |
| #include <linux/usb/musb-ux500.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/pinctrl/consumer.h> |
| |
| /* Bank AB8500_SYS_CTRL2_BLOCK */ |
| #define AB8500_MAIN_WD_CTRL_REG 0x01 |
| |
| /* Bank AB8500_USB */ |
| #define AB8500_USB_LINE_STAT_REG 0x80 |
| #define AB8505_USB_LINE_STAT_REG 0x94 |
| #define AB8540_USB_LINK_STAT_REG 0x94 |
| #define AB9540_USB_LINK_STAT_REG 0x94 |
| #define AB8540_USB_OTG_CTL_REG 0x87 |
| #define AB8500_USB_PHY_CTRL_REG 0x8A |
| #define AB8540_VBUS_CTRL_REG 0x82 |
| |
| /* Bank AB8500_DEVELOPMENT */ |
| #define AB8500_BANK12_ACCESS 0x00 |
| |
| /* Bank AB8500_DEBUG */ |
| #define AB8540_DEBUG 0x32 |
| #define AB8500_USB_PHY_TUNE1 0x05 |
| #define AB8500_USB_PHY_TUNE2 0x06 |
| #define AB8500_USB_PHY_TUNE3 0x07 |
| |
| /* Bank AB8500_INTERRUPT */ |
| #define AB8500_IT_SOURCE2_REG 0x01 |
| |
| #define AB8500_BIT_OTG_STAT_ID (1 << 0) |
| #define AB8500_BIT_PHY_CTRL_HOST_EN (1 << 0) |
| #define AB8500_BIT_PHY_CTRL_DEVICE_EN (1 << 1) |
| #define AB8500_BIT_WD_CTRL_ENABLE (1 << 0) |
| #define AB8500_BIT_WD_CTRL_KICK (1 << 1) |
| #define AB8500_BIT_SOURCE2_VBUSDET (1 << 7) |
| #define AB8540_BIT_OTG_CTL_VBUS_VALID_ENA (1 << 0) |
| #define AB8540_BIT_OTG_CTL_ID_HOST_ENA (1 << 1) |
| #define AB8540_BIT_OTG_CTL_ID_DEV_ENA (1 << 5) |
| #define AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA (1 << 0) |
| |
| #define AB8500_WD_KICK_DELAY_US 100 /* usec */ |
| #define AB8500_WD_V11_DISABLE_DELAY_US 100 /* usec */ |
| #define AB8500_V20_31952_DISABLE_DELAY_US 100 /* usec */ |
| |
| /* Usb line status register */ |
| enum ab8500_usb_link_status { |
| USB_LINK_NOT_CONFIGURED_8500 = 0, |
| USB_LINK_STD_HOST_NC_8500, |
| USB_LINK_STD_HOST_C_NS_8500, |
| USB_LINK_STD_HOST_C_S_8500, |
| USB_LINK_HOST_CHG_NM_8500, |
| USB_LINK_HOST_CHG_HS_8500, |
| USB_LINK_HOST_CHG_HS_CHIRP_8500, |
| USB_LINK_DEDICATED_CHG_8500, |
| USB_LINK_ACA_RID_A_8500, |
| USB_LINK_ACA_RID_B_8500, |
| USB_LINK_ACA_RID_C_NM_8500, |
| USB_LINK_ACA_RID_C_HS_8500, |
| USB_LINK_ACA_RID_C_HS_CHIRP_8500, |
| USB_LINK_HM_IDGND_8500, |
| USB_LINK_RESERVED_8500, |
| USB_LINK_NOT_VALID_LINK_8500, |
| }; |
| |
| enum ab8505_usb_link_status { |
| USB_LINK_NOT_CONFIGURED_8505 = 0, |
| USB_LINK_STD_HOST_NC_8505, |
| USB_LINK_STD_HOST_C_NS_8505, |
| USB_LINK_STD_HOST_C_S_8505, |
| USB_LINK_CDP_8505, |
| USB_LINK_RESERVED0_8505, |
| USB_LINK_RESERVED1_8505, |
| USB_LINK_DEDICATED_CHG_8505, |
| USB_LINK_ACA_RID_A_8505, |
| USB_LINK_ACA_RID_B_8505, |
| USB_LINK_ACA_RID_C_NM_8505, |
| USB_LINK_RESERVED2_8505, |
| USB_LINK_RESERVED3_8505, |
| USB_LINK_HM_IDGND_8505, |
| USB_LINK_CHARGERPORT_NOT_OK_8505, |
| USB_LINK_CHARGER_DM_HIGH_8505, |
| USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8505, |
| USB_LINK_STD_UPSTREAM_NO_IDGNG_NO_VBUS_8505, |
| USB_LINK_STD_UPSTREAM_8505, |
| USB_LINK_CHARGER_SE1_8505, |
| USB_LINK_CARKIT_CHGR_1_8505, |
| USB_LINK_CARKIT_CHGR_2_8505, |
| USB_LINK_ACA_DOCK_CHGR_8505, |
| USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_8505, |
| USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_8505, |
| USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8505, |
| USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8505, |
| USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_8505, |
| }; |
| |
| enum ab8540_usb_link_status { |
| USB_LINK_NOT_CONFIGURED_8540 = 0, |
| USB_LINK_STD_HOST_NC_8540, |
| USB_LINK_STD_HOST_C_NS_8540, |
| USB_LINK_STD_HOST_C_S_8540, |
| USB_LINK_CDP_8540, |
| USB_LINK_RESERVED0_8540, |
| USB_LINK_RESERVED1_8540, |
| USB_LINK_DEDICATED_CHG_8540, |
| USB_LINK_ACA_RID_A_8540, |
| USB_LINK_ACA_RID_B_8540, |
| USB_LINK_ACA_RID_C_NM_8540, |
| USB_LINK_RESERVED2_8540, |
| USB_LINK_RESERVED3_8540, |
| USB_LINK_HM_IDGND_8540, |
| USB_LINK_CHARGERPORT_NOT_OK_8540, |
| USB_LINK_CHARGER_DM_HIGH_8540, |
| USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8540, |
| USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_8540, |
| USB_LINK_STD_UPSTREAM_8540, |
| USB_LINK_CHARGER_SE1_8540, |
| USB_LINK_CARKIT_CHGR_1_8540, |
| USB_LINK_CARKIT_CHGR_2_8540, |
| USB_LINK_ACA_DOCK_CHGR_8540, |
| USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_8540, |
| USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_8540, |
| USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8540, |
| USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8540, |
| USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_8540 |
| }; |
| |
| enum ab9540_usb_link_status { |
| USB_LINK_NOT_CONFIGURED_9540 = 0, |
| USB_LINK_STD_HOST_NC_9540, |
| USB_LINK_STD_HOST_C_NS_9540, |
| USB_LINK_STD_HOST_C_S_9540, |
| USB_LINK_CDP_9540, |
| USB_LINK_RESERVED0_9540, |
| USB_LINK_RESERVED1_9540, |
| USB_LINK_DEDICATED_CHG_9540, |
| USB_LINK_ACA_RID_A_9540, |
| USB_LINK_ACA_RID_B_9540, |
| USB_LINK_ACA_RID_C_NM_9540, |
| USB_LINK_RESERVED2_9540, |
| USB_LINK_RESERVED3_9540, |
| USB_LINK_HM_IDGND_9540, |
| USB_LINK_CHARGERPORT_NOT_OK_9540, |
| USB_LINK_CHARGER_DM_HIGH_9540, |
| USB_LINK_PHYEN_NO_VBUS_NO_IDGND_9540, |
| USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_9540, |
| USB_LINK_STD_UPSTREAM_9540, |
| USB_LINK_CHARGER_SE1_9540, |
| USB_LINK_CARKIT_CHGR_1_9540, |
| USB_LINK_CARKIT_CHGR_2_9540, |
| USB_LINK_ACA_DOCK_CHGR_9540, |
| USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_9540, |
| USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_9540, |
| USB_LINK_SAMSUNG_UART_CBL_PHY_EN_9540, |
| USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_9540, |
| USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_9540 |
| }; |
| |
| enum ab8500_usb_mode { |
| USB_IDLE = 0, |
| USB_PERIPHERAL, |
| USB_HOST, |
| USB_DEDICATED_CHG |
| }; |
| |
| /* Register USB_LINK_STATUS interrupt */ |
| #define AB8500_USB_FLAG_USE_LINK_STATUS_IRQ (1 << 0) |
| /* Register ID_WAKEUP_F interrupt */ |
| #define AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ (1 << 1) |
| /* Register VBUS_DET_F interrupt */ |
| #define AB8500_USB_FLAG_USE_VBUS_DET_IRQ (1 << 2) |
| /* Driver is using the ab-iddet driver*/ |
| #define AB8500_USB_FLAG_USE_AB_IDDET (1 << 3) |
| /* Enable setting regulators voltage */ |
| #define AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE (1 << 4) |
| /* Enable the check_vbus_status workaround */ |
| #define AB8500_USB_FLAG_USE_CHECK_VBUS_STATUS (1 << 5) |
| /* Enable the vbus host workaround */ |
| #define AB8500_USB_FLAG_USE_VBUS_HOST_QUIRK (1 << 6) |
| |
| struct ab8500_usb { |
| struct usb_phy phy; |
| struct device *dev; |
| struct ab8500 *ab8500; |
| unsigned vbus_draw; |
| struct work_struct phy_dis_work; |
| struct work_struct vbus_event_work; |
| enum ab8500_usb_mode mode; |
| struct clk *sysclk; |
| struct regulator *v_ape; |
| struct regulator *v_musb; |
| struct regulator *v_ulpi; |
| int saved_v_ulpi; |
| int previous_link_status_state; |
| struct pinctrl *pinctrl; |
| struct pinctrl_state *pins_sleep; |
| bool enabled_charging_detection; |
| unsigned int flags; |
| }; |
| |
| static inline struct ab8500_usb *phy_to_ab(struct usb_phy *x) |
| { |
| return container_of(x, struct ab8500_usb, phy); |
| } |
| |
| static void ab8500_usb_wd_workaround(struct ab8500_usb *ab) |
| { |
| abx500_set_register_interruptible(ab->dev, |
| AB8500_SYS_CTRL2_BLOCK, |
| AB8500_MAIN_WD_CTRL_REG, |
| AB8500_BIT_WD_CTRL_ENABLE); |
| |
| udelay(AB8500_WD_KICK_DELAY_US); |
| |
| abx500_set_register_interruptible(ab->dev, |
| AB8500_SYS_CTRL2_BLOCK, |
| AB8500_MAIN_WD_CTRL_REG, |
| (AB8500_BIT_WD_CTRL_ENABLE |
| | AB8500_BIT_WD_CTRL_KICK)); |
| |
| udelay(AB8500_WD_V11_DISABLE_DELAY_US); |
| |
| abx500_set_register_interruptible(ab->dev, |
| AB8500_SYS_CTRL2_BLOCK, |
| AB8500_MAIN_WD_CTRL_REG, |
| 0); |
| } |
| |
| static void ab8500_usb_regulator_enable(struct ab8500_usb *ab) |
| { |
| int ret, volt; |
| |
| ret = regulator_enable(ab->v_ape); |
| if (ret) |
| dev_err(ab->dev, "Failed to enable v-ape\n"); |
| |
| if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) { |
| ab->saved_v_ulpi = regulator_get_voltage(ab->v_ulpi); |
| if (ab->saved_v_ulpi < 0) |
| dev_err(ab->dev, "Failed to get v_ulpi voltage\n"); |
| |
| ret = regulator_set_voltage(ab->v_ulpi, 1300000, 1350000); |
| if (ret < 0) |
| dev_err(ab->dev, "Failed to set the Vintcore to 1.3V, ret=%d\n", |
| ret); |
| |
| ret = regulator_set_optimum_mode(ab->v_ulpi, 28000); |
| if (ret < 0) |
| dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n", |
| ret); |
| } |
| |
| ret = regulator_enable(ab->v_ulpi); |
| if (ret) |
| dev_err(ab->dev, "Failed to enable vddulpivio18\n"); |
| |
| if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) { |
| volt = regulator_get_voltage(ab->v_ulpi); |
| if ((volt != 1300000) && (volt != 1350000)) |
| dev_err(ab->dev, "Vintcore is not set to 1.3V volt=%d\n", |
| volt); |
| } |
| |
| ret = regulator_enable(ab->v_musb); |
| if (ret) |
| dev_err(ab->dev, "Failed to enable musb_1v8\n"); |
| } |
| |
| static void ab8500_usb_regulator_disable(struct ab8500_usb *ab) |
| { |
| int ret; |
| |
| regulator_disable(ab->v_musb); |
| |
| regulator_disable(ab->v_ulpi); |
| |
| /* USB is not the only consumer of Vintcore, restore old settings */ |
| if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) { |
| if (ab->saved_v_ulpi > 0) { |
| ret = regulator_set_voltage(ab->v_ulpi, |
| ab->saved_v_ulpi, ab->saved_v_ulpi); |
| if (ret < 0) |
| dev_err(ab->dev, "Failed to set the Vintcore to %duV, ret=%d\n", |
| ab->saved_v_ulpi, ret); |
| } |
| |
| ret = regulator_set_optimum_mode(ab->v_ulpi, 0); |
| if (ret < 0) |
| dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n", |
| ret); |
| } |
| |
| regulator_disable(ab->v_ape); |
| } |
| |
| static void ab8500_usb_wd_linkstatus(struct ab8500_usb *ab, u8 bit) |
| { |
| /* Workaround for v2.0 bug # 31952 */ |
| if (is_ab8500_2p0(ab->ab8500)) { |
| abx500_mask_and_set_register_interruptible(ab->dev, |
| AB8500_USB, AB8500_USB_PHY_CTRL_REG, |
| bit, bit); |
| udelay(AB8500_V20_31952_DISABLE_DELAY_US); |
| } |
| } |
| |
| static void ab8500_usb_phy_enable(struct ab8500_usb *ab, bool sel_host) |
| { |
| u8 bit; |
| bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN : |
| AB8500_BIT_PHY_CTRL_DEVICE_EN; |
| |
| /* mux and configure USB pins to DEFAULT state */ |
| ab->pinctrl = pinctrl_get_select(ab->dev, PINCTRL_STATE_DEFAULT); |
| if (IS_ERR(ab->pinctrl)) |
| dev_err(ab->dev, "could not get/set default pinstate\n"); |
| |
| if (clk_prepare_enable(ab->sysclk)) |
| dev_err(ab->dev, "can't prepare/enable clock\n"); |
| |
| ab8500_usb_regulator_enable(ab); |
| |
| abx500_mask_and_set_register_interruptible(ab->dev, |
| AB8500_USB, AB8500_USB_PHY_CTRL_REG, |
| bit, bit); |
| |
| if (ab->flags & AB8500_USB_FLAG_USE_VBUS_HOST_QUIRK) { |
| if (sel_host) |
| abx500_set_register_interruptible(ab->dev, |
| AB8500_USB, AB8540_USB_OTG_CTL_REG, |
| AB8540_BIT_OTG_CTL_VBUS_VALID_ENA | |
| AB8540_BIT_OTG_CTL_ID_HOST_ENA | |
| AB8540_BIT_OTG_CTL_ID_DEV_ENA); |
| } |
| } |
| |
| static void ab8500_usb_phy_disable(struct ab8500_usb *ab, bool sel_host) |
| { |
| u8 bit; |
| bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN : |
| AB8500_BIT_PHY_CTRL_DEVICE_EN; |
| |
| ab8500_usb_wd_linkstatus(ab, bit); |
| |
| abx500_mask_and_set_register_interruptible(ab->dev, |
| AB8500_USB, AB8500_USB_PHY_CTRL_REG, |
| bit, 0); |
| |
| /* Needed to disable the phy.*/ |
| ab8500_usb_wd_workaround(ab); |
| |
| clk_disable_unprepare(ab->sysclk); |
| |
| ab8500_usb_regulator_disable(ab); |
| |
| if (!IS_ERR(ab->pinctrl)) { |
| /* configure USB pins to SLEEP state */ |
| ab->pins_sleep = pinctrl_lookup_state(ab->pinctrl, |
| PINCTRL_STATE_SLEEP); |
| |
| if (IS_ERR(ab->pins_sleep)) |
| dev_dbg(ab->dev, "could not get sleep pinstate\n"); |
| else if (pinctrl_select_state(ab->pinctrl, ab->pins_sleep)) |
| dev_err(ab->dev, "could not set pins to sleep state\n"); |
| |
| /* |
| * as USB pins are shared with iddet, release them to allow |
| * iddet to request them |
| */ |
| pinctrl_put(ab->pinctrl); |
| } |
| } |
| |
| #define ab8500_usb_host_phy_en(ab) ab8500_usb_phy_enable(ab, true) |
| #define ab8500_usb_host_phy_dis(ab) ab8500_usb_phy_disable(ab, true) |
| #define ab8500_usb_peri_phy_en(ab) ab8500_usb_phy_enable(ab, false) |
| #define ab8500_usb_peri_phy_dis(ab) ab8500_usb_phy_disable(ab, false) |
| |
| static int ab9540_usb_link_status_update(struct ab8500_usb *ab, |
| enum ab9540_usb_link_status lsts) |
| { |
| enum ux500_musb_vbus_id_status event = 0; |
| |
| dev_dbg(ab->dev, "ab9540_usb_link_status_update %d\n", lsts); |
| |
| if (ab->previous_link_status_state == USB_LINK_HM_IDGND_9540 && |
| (lsts == USB_LINK_STD_HOST_C_NS_9540 || |
| lsts == USB_LINK_STD_HOST_NC_9540)) |
| return 0; |
| |
| if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_9540 && |
| (lsts == USB_LINK_STD_HOST_NC_9540)) |
| return 0; |
| |
| ab->previous_link_status_state = lsts; |
| |
| switch (lsts) { |
| case USB_LINK_ACA_RID_B_9540: |
| event = UX500_MUSB_RIDB; |
| case USB_LINK_NOT_CONFIGURED_9540: |
| case USB_LINK_RESERVED0_9540: |
| case USB_LINK_RESERVED1_9540: |
| case USB_LINK_RESERVED2_9540: |
| case USB_LINK_RESERVED3_9540: |
| if (ab->mode == USB_PERIPHERAL) |
| 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 (event != UX500_MUSB_RIDB) |
| event = UX500_MUSB_NONE; |
| /* Fallback to default B_IDLE as nothing is connected. */ |
| ab->phy.state = OTG_STATE_B_IDLE; |
| break; |
| |
| case USB_LINK_ACA_RID_C_NM_9540: |
| event = UX500_MUSB_RIDC; |
| case USB_LINK_STD_HOST_NC_9540: |
| case USB_LINK_STD_HOST_C_NS_9540: |
| case USB_LINK_STD_HOST_C_S_9540: |
| case USB_LINK_CDP_9540: |
| if (ab->mode == USB_HOST) { |
| ab->mode = USB_PERIPHERAL; |
| ab8500_usb_host_phy_dis(ab); |
| ab8500_usb_peri_phy_en(ab); |
| atomic_notifier_call_chain(&ab->phy.notifier, |
| UX500_MUSB_PREPARE, &ab->vbus_draw); |
| } |
| 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); |
| } |
| if (event != UX500_MUSB_RIDC) |
| event = UX500_MUSB_VBUS; |
| break; |
| |
| case USB_LINK_ACA_RID_A_9540: |
| event = UX500_MUSB_RIDA; |
| case USB_LINK_HM_IDGND_9540: |
| case USB_LINK_STD_UPSTREAM_9540: |
| if (ab->mode == USB_PERIPHERAL) { |
| ab->mode = USB_HOST; |
| ab8500_usb_peri_phy_dis(ab); |
| ab8500_usb_host_phy_en(ab); |
| atomic_notifier_call_chain(&ab->phy.notifier, |
| UX500_MUSB_PREPARE, &ab->vbus_draw); |
| } |
| 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_9540: |
| ab->mode = USB_DEDICATED_CHG; |
| event = UX500_MUSB_CHARGER; |
| atomic_notifier_call_chain(&ab->phy.notifier, |
| event, &ab->vbus_draw); |
| break; |
| |
| case USB_LINK_PHYEN_NO_VBUS_NO_IDGND_9540: |
| case USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_9540: |
| if (!(is_ab9540_2p0_or_earlier(ab->ab8500))) { |
| event = UX500_MUSB_NONE; |
| 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; |
| } |
| } |
| break; |
| |
| default: |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int ab8540_usb_link_status_update(struct ab8500_usb *ab, |
| enum ab8540_usb_link_status lsts) |
| { |
| enum ux500_musb_vbus_id_status event = 0; |
| |
| dev_dbg(ab->dev, "ab8540_usb_link_status_update %d\n", lsts); |
| |
| if (ab->enabled_charging_detection) { |
| /* Disable USB Charger detection */ |
| abx500_mask_and_set_register_interruptible(ab->dev, |
| AB8500_USB, AB8540_VBUS_CTRL_REG, |
| AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA, 0x00); |
| ab->enabled_charging_detection = false; |
| } |
| |
| /* |
| * Spurious link_status interrupts are seen in case of a |
| * disconnection of a device in IDGND and RIDA stage |
| */ |
| if (ab->previous_link_status_state == USB_LINK_HM_IDGND_8540 && |
| (lsts == USB_LINK_STD_HOST_C_NS_8540 || |
| lsts == USB_LINK_STD_HOST_NC_8540)) |
| return 0; |
| |
| if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8540 && |
| (lsts == USB_LINK_STD_HOST_NC_8540)) |
| return 0; |
| |
| ab->previous_link_status_state = lsts; |
| |
| switch (lsts) { |
| case USB_LINK_ACA_RID_B_8540: |
| event = UX500_MUSB_RIDB; |
| case USB_LINK_NOT_CONFIGURED_8540: |
| case USB_LINK_RESERVED0_8540: |
| case USB_LINK_RESERVED1_8540: |
| case USB_LINK_RESERVED2_8540: |
| case USB_LINK_RESERVED3_8540: |
| 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.state = OTG_STATE_B_IDLE; |
| break; |
| |
| case USB_LINK_ACA_RID_C_NM_8540: |
| event = UX500_MUSB_RIDC; |
| case USB_LINK_STD_HOST_NC_8540: |
| case USB_LINK_STD_HOST_C_NS_8540: |
| case USB_LINK_STD_HOST_C_S_8540: |
| case USB_LINK_CDP_8540: |
| 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); |
| } |
| if (event != UX500_MUSB_RIDC) |
| event = UX500_MUSB_VBUS; |
| break; |
| |
| case USB_LINK_ACA_RID_A_8540: |
| case USB_LINK_ACA_DOCK_CHGR_8540: |
| event = UX500_MUSB_RIDA; |
| case USB_LINK_HM_IDGND_8540: |
| case USB_LINK_STD_UPSTREAM_8540: |
| 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_8540: |
| ab->mode = USB_DEDICATED_CHG; |
| event = UX500_MUSB_CHARGER; |
| atomic_notifier_call_chain(&ab->phy.notifier, |
| event, &ab->vbus_draw); |
| break; |
| |
| case USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8540: |
| case USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_8540: |
| event = UX500_MUSB_NONE; |
| 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; |
| } |
| break; |
| |
| default: |
| event = UX500_MUSB_NONE; |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int ab8505_usb_link_status_update(struct ab8500_usb *ab, |
| enum ab8505_usb_link_status lsts) |
| { |
| enum ux500_musb_vbus_id_status event = 0; |
| |
| dev_dbg(ab->dev, "ab8505_usb_link_status_update %d\n", lsts); |
| |
| /* |
| * Spurious link_status interrupts are seen at the time of |
| * disconnection of a device in RIDA state |
| */ |
| if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8505 && |
| (lsts == USB_LINK_STD_HOST_NC_8505)) |
| return 0; |
| |
| ab->previous_link_status_state = lsts; |
| |
| switch (lsts) { |
| case USB_LINK_ACA_RID_B_8505: |
| event = UX500_MUSB_RIDB; |
| case USB_LINK_NOT_CONFIGURED_8505: |
| case USB_LINK_RESERVED0_8505: |
| case USB_LINK_RESERVED1_8505: |
| case USB_LINK_RESERVED2_8505: |
| case USB_LINK_RESERVED3_8505: |
| 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.state = OTG_STATE_B_IDLE; |
| break; |
| |
| case USB_LINK_ACA_RID_C_NM_8505: |
| event = UX500_MUSB_RIDC; |
| case USB_LINK_STD_HOST_NC_8505: |
| case USB_LINK_STD_HOST_C_NS_8505: |
| case USB_LINK_STD_HOST_C_S_8505: |
| case USB_LINK_CDP_8505: |
| 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); |
| } |
| if (event != UX500_MUSB_RIDC) |
| event = UX500_MUSB_VBUS; |
| break; |
| |
| case USB_LINK_ACA_RID_A_8505: |
| case USB_LINK_ACA_DOCK_CHGR_8505: |
| event = UX500_MUSB_RIDA; |
| case USB_LINK_HM_IDGND_8505: |
| 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_8505: |
| ab->mode = USB_DEDICATED_CHG; |
| event = UX500_MUSB_CHARGER; |
| atomic_notifier_call_chain(&ab->phy.notifier, |
| event, &ab->vbus_draw); |
| break; |
| |
| default: |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int ab8500_usb_link_status_update(struct ab8500_usb *ab, |
| enum ab8500_usb_link_status lsts) |
| { |
| enum ux500_musb_vbus_id_status event = 0; |
| |
| dev_dbg(ab->dev, "ab8500_usb_link_status_update %d\n", lsts); |
| |
| /* |
| * Spurious link_status interrupts are seen in case of a |
| * disconnection of a device in IDGND and RIDA stage |
| */ |
| if (ab->previous_link_status_state == USB_LINK_HM_IDGND_8500 && |
| (lsts == USB_LINK_STD_HOST_C_NS_8500 || |
| lsts == USB_LINK_STD_HOST_NC_8500)) |
| 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; |
| 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.state = OTG_STATE_B_IDLE; |
| 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; |
| 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); |
| } |
| if (event != UX500_MUSB_RIDC) |
| event = UX500_MUSB_VBUS; |
| break; |
| |
| case USB_LINK_ACA_RID_A_8500: |
| event = UX500_MUSB_RIDA; |
| 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); |
| 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 fucntion 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; |
| |
| abx500_get_register_interruptible(ab->dev, |
| AB8500_USB, AB8500_USB_LINE_STAT_REG, ®); |
| lsts = (reg >> 3) & 0x0F; |
| ret = ab8500_usb_link_status_update(ab, lsts); |
| } else if (is_ab8505(ab->ab8500)) { |
| enum ab8505_usb_link_status lsts; |
| |
| abx500_get_register_interruptible(ab->dev, |
| AB8500_USB, AB8505_USB_LINE_STAT_REG, ®); |
| lsts = (reg >> 3) & 0x1F; |
| ret = ab8505_usb_link_status_update(ab, lsts); |
| } else if (is_ab8540(ab->ab8500)) { |
| enum ab8540_usb_link_status lsts; |
| |
| abx500_get_register_interruptible(ab->dev, |
| AB8500_USB, AB8540_USB_LINK_STAT_REG, ®); |
| lsts = (reg >> 3) & 0xFF; |
| ret = ab8540_usb_link_status_update(ab, lsts); |
| } else if (is_ab9540(ab->ab8500)) { |
| enum ab9540_usb_link_status lsts; |
| |
| abx500_get_register_interruptible(ab->dev, |
| AB8500_USB, AB9540_USB_LINK_STAT_REG, ®); |
| lsts = (reg >> 3) & 0xFF; |
| ret = ab9540_usb_link_status_update(ab, lsts); |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * Disconnection Sequence: |
| * 1. Disconect 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 = UX500_MUSB_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 (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); |
| } |
| |
| /* Check if VBUS is set and linkstatus has not detected a cable. */ |
| static bool ab8500_usb_check_vbus_status(struct ab8500_usb *ab) |
| { |
| u8 isource2; |
| u8 reg; |
| enum ab8540_usb_link_status lsts; |
| |
| abx500_get_register_interruptible(ab->dev, |
| AB8500_INTERRUPT, AB8500_IT_SOURCE2_REG, |
| &isource2); |
| |
| /* If Vbus is below 3.6V abort */ |
| if (!(isource2 & AB8500_BIT_SOURCE2_VBUSDET)) |
| return false; |
| |
| abx500_get_register_interruptible(ab->dev, |
| AB8500_USB, AB8540_USB_LINK_STAT_REG, |
| ®); |
| |
| lsts = (reg >> 3) & 0xFF; |
| |
| /* Check if linkstatus has detected a cable */ |
| if (lsts) |
| return false; |
| |
| return true; |
| } |
| |
| /* re-trigger charger detection again with watchdog re-kick. */ |
| static void ab8500_usb_vbus_turn_on_event_work(struct work_struct *work) |
| { |
| struct ab8500_usb *ab = container_of(work, struct ab8500_usb, |
| vbus_event_work); |
| |
| if (ab->mode != USB_IDLE) |
| return; |
| |
| abx500_set_register_interruptible(ab->dev, |
| AB8500_SYS_CTRL2_BLOCK, AB8500_MAIN_WD_CTRL_REG, |
| AB8500_BIT_WD_CTRL_ENABLE); |
| |
| udelay(100); |
| |
| abx500_set_register_interruptible(ab->dev, |
| AB8500_SYS_CTRL2_BLOCK, AB8500_MAIN_WD_CTRL_REG, |
| AB8500_BIT_WD_CTRL_ENABLE | AB8500_BIT_WD_CTRL_KICK); |
| |
| udelay(100); |
| |
| /* Disable Main watchdog */ |
| abx500_set_register_interruptible(ab->dev, |
| AB8500_SYS_CTRL2_BLOCK, AB8500_MAIN_WD_CTRL_REG, |
| 0x0); |
| |
| /* Enable USB Charger detection */ |
| abx500_mask_and_set_register_interruptible(ab->dev, |
| AB8500_USB, AB8540_VBUS_CTRL_REG, |
| AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA, |
| AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA); |
| |
| ab->enabled_charging_detection = true; |
| } |
| |
| static unsigned ab8500_eyediagram_workaroud(struct ab8500_usb *ab, unsigned mA) |
| { |
| /* |
| * AB8500 V2 has eye diagram issues when drawing more than 100mA from |
| * VBUS. Set charging current to 100mA in case of standard host |
| */ |
| if (is_ab8500_2p0_or_earlier(ab->ab8500)) |
| if (mA > 100) |
| mA = 100; |
| |
| return mA; |
| } |
| |
| static int ab8500_usb_set_power(struct usb_phy *phy, unsigned mA) |
| { |
| struct ab8500_usb *ab; |
| |
| if (!phy) |
| return -ENODEV; |
| |
| ab = phy_to_ab(phy); |
| |
| mA = ab8500_eyediagram_workaroud(ab, mA); |
| |
| ab->vbus_draw = mA; |
| |
| atomic_notifier_call_chain(&ab->phy.notifier, |
| UX500_MUSB_VBUS, &ab->vbus_draw); |
| |
| return 0; |
| } |
| |
| 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->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->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) { |
| dev_err(&pdev->dev, "Link status irq not found\n"); |
| return irq; |
| } |
| err = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
| ab8500_usb_link_status_irq, |
| IRQF_NO_SUSPEND | IRQF_SHARED, |
| "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) { |
| dev_err(&pdev->dev, "ID fall irq not found\n"); |
| return irq; |
| } |
| err = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
| ab8500_usb_disconnect_irq, |
| IRQF_NO_SUSPEND | IRQF_SHARED, |
| "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) { |
| dev_err(&pdev->dev, "VBUS fall irq not found\n"); |
| return irq; |
| } |
| err = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
| ab8500_usb_disconnect_irq, |
| IRQF_NO_SUSPEND | IRQF_SHARED, |
| "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 regester 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 regester 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 void ab8500_usb_set_ab8540_tuning_values(struct ab8500_usb *ab) |
| { |
| int err; |
| |
| err = abx500_set_register_interruptible(ab->dev, |
| AB8540_DEBUG, AB8500_USB_PHY_TUNE1, 0xCC); |
| if (err < 0) |
| dev_err(ab->dev, "Failed to set PHY_TUNE1 register ret=%d\n", |
| err); |
| |
| err = abx500_set_register_interruptible(ab->dev, |
| AB8540_DEBUG, AB8500_USB_PHY_TUNE2, 0x60); |
| if (err < 0) |
| dev_err(ab->dev, "Failed to set PHY_TUNE2 register ret=%d\n", |
| err); |
| |
| err = abx500_set_register_interruptible(ab->dev, |
| AB8540_DEBUG, AB8500_USB_PHY_TUNE3, 0x90); |
| if (err < 0) |
| dev_err(ab->dev, "Failed to set PHY_TUNE3 regester ret=%d\n", |
| err); |
| } |
| |
| static void ab8500_usb_set_ab9540_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, 0x60); |
| 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, 0x80); |
| if (err < 0) |
| dev_err(ab->dev, "Failed to set PHY_TUNE3 regester 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 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.set_power = ab8500_usb_set_power; |
| ab->phy.state = OTG_STATE_UNDEFINED; |
| |
| otg->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; |
| } else if (is_ab8540(ab->ab8500)) { |
| ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ | |
| AB8500_USB_FLAG_USE_CHECK_VBUS_STATUS | |
| AB8500_USB_FLAG_USE_VBUS_HOST_QUIRK | |
| AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE; |
| } else if (is_ab9540(ab->ab8500)) { |
| ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ | |
| AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE; |
| if (is_ab9540_2p0_or_earlier(ab->ab8500)) |
| ab->flags |= AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ | |
| AB8500_USB_FLAG_USE_VBUS_DET_IRQ; |
| } |
| |
| /* 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); |
| |
| INIT_WORK(&ab->vbus_event_work, ab8500_usb_vbus_turn_on_event_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); |
| else if (is_ab8540(ab->ab8500)) |
| /* Phy tuning values for AB8540 */ |
| ab8500_usb_set_ab8540_tuning_values(ab); |
| else if (is_ab9540(ab->ab8500)) |
| /* Phy tuning values for AB9540 */ |
| ab8500_usb_set_ab9540_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); |
| |
| if (ab->flags & AB8500_USB_FLAG_USE_CHECK_VBUS_STATUS) { |
| if (ab8500_usb_check_vbus_status(ab)) |
| schedule_work(&ab->vbus_event_work); |
| } |
| |
| 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); |
| cancel_work_sync(&ab->vbus_event_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 struct platform_device_id ab8500_usb_devtype[] = { |
| { .name = "ab8500-usb", }, |
| { .name = "ab8540-usb", }, |
| { .name = "ab9540-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"); |