/* * drivers/usb/otg/ab8500_usb.c * * USB transceiver driver for AB8500 chip * * Copyright (C) 2010 ST-Ericsson AB * Mian Yousaf Kaukab * * 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 #include #include #include #include #include #include #include #include #include #include #include /* 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 AB8500_USB_PHY_CTRL_REG 0x8A /* Bank AB8500_DEVELOPMENT */ #define AB8500_BANK12_ACCESS 0x00 /* Bank AB8500_DEBUG */ #define AB8500_USB_PHY_TUNE1 0x05 #define AB8500_USB_PHY_TUNE2 0x06 #define AB8500_USB_PHY_TUNE3 0x07 #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_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 ab8500_usb_mode { USB_IDLE = 0, USB_PERIPHERAL, USB_HOST, USB_DEDICATED_CHG }; struct ab8500_usb { struct usb_phy phy; struct device *dev; struct ab8500 *ab8500; unsigned vbus_draw; struct work_struct phy_dis_work; enum ab8500_usb_mode mode; 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; }; 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 (!is_ab8500_2p0_or_earlier(ab->ab8500)) { 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 (!is_ab8500_2p0_or_earlier(ab->ab8500)) { 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 (!is_ab8500_2p0_or_earlier(ab->ab8500)) { 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"); ab8500_usb_regulator_enable(ab); abx500_mask_and_set_register_interruptible(ab->dev, AB8500_USB, AB8500_USB_PHY_CTRL_REG, bit, bit); } 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); 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 idddet, 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 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); } 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); } 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 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; 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; } 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; } 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 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; platform_set_drvdata(pdev, ab); ATOMIC_INIT_NOTIFIER_HEAD(&ab->phy.notifier); /* 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; 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; } /* Phy tuning values for AB8500 */ if (!is_ab8500_2p0_or_earlier(ab->ab8500)) { /* 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); } /* Phy tuning values for AB8505 */ if (is_ab8505(ab->ab8500)) { /* 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); } /* Needed to enable ID detection. */ ab8500_usb_wd_workaround(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 struct platform_driver ab8500_usb_driver = { .probe = ab8500_usb_probe, .remove = ab8500_usb_remove, .driver = { .name = "ab8500-usb", .owner = THIS_MODULE, }, }; 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_ALIAS("platform:ab8500_usb"); MODULE_AUTHOR("ST-Ericsson AB"); MODULE_DESCRIPTION("AB8500 usb transceiver driver"); MODULE_LICENSE("GPL");