/* * 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 #include #include #include #include static struct wake_lock ab8500_musb_wakelock; #define AB8500_MAIN_WD_CTRL_REG 0x01 #define AB8500_USB_LINE_STAT_REG 0x80 #define AB8500_USB_PHY_CTRL_REG 0x8A #define AB8500_VBUS_CTRL_REG 0x82 #define AB8500_IT_SOURCE2_REG 0x01 #define AB8500_IT_SOURCE20_REG 0x13 #define AB8500_SRC_INT_USB_HOST 0x04 #define AB8500_SRC_INT_USB_DEVICE 0x80 #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_VBUS_ENABLE (1 << 0) #define AB8500_V1x_LINK_STAT_WAIT (HZ/10) #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 */ #define AB8500_WD_V10_DISABLE_DELAY_MS 100 /* ms */ /* Registers in bank 0x11 */ #define AB8500_BANK12_ACCESS 0x00 /* Registers in bank 0x12 */ #define AB8500_USB_PHY_TUNE1 0x05 #define AB8500_USB_PHY_TUNE2 0x06 #define AB8500_USB_PHY_TUNE3 0x07 static struct pm_qos_request usb_pm_qos_latency; static bool usb_pm_qos_is_latency_0; #define USB_PROBE_DELAY 1000 /* 1 seconds */ #define USB_LIMIT (200) /* If we have more than 200 irqs per second */ #define PUBLIC_ID_BACKUPRAM1 (U8500_BACKUPRAM1_BASE + 0x0FC0) #define MAX_USB_SERIAL_NUMBER_LEN 31 #define AB8505_USB_LINE_STAT_REG 0x94 /* 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; int irq_num_id_rise; int irq_num_id_fall; int irq_num_vbus_rise; int irq_num_vbus_fall; int irq_num_link_status; unsigned vbus_draw; struct delayed_work dwork; struct work_struct phy_dis_work; unsigned long link_status_wait; enum ab8500_usb_mode mode; struct clk *sysclk; struct regulator *v_ape; struct regulator *v_musb; struct regulator *v_ulpi; struct delayed_work work_usb_workaround; bool sysfs_flag; }; 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)); if (!is_ab8500_1p0_or_earlier(ab->ab8500)) 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_load(struct work_struct *work) { int cpu; unsigned int num_irqs = 0; static unsigned int old_num_irqs = UINT_MAX; struct delayed_work *work_usb_workaround = to_delayed_work(work); struct ab8500_usb *ab = container_of(work_usb_workaround, struct ab8500_usb, work_usb_workaround); for_each_online_cpu(cpu) num_irqs += kstat_irqs_cpu(IRQ_DB8500_USBOTG, cpu); if ((num_irqs > old_num_irqs) && (num_irqs - old_num_irqs) > USB_LIMIT) { prcmu_qos_update_requirement(PRCMU_QOS_ARM_OPP, "usb", 125); if (!usb_pm_qos_is_latency_0) { pm_qos_add_request(&usb_pm_qos_latency, PM_QOS_CPU_DMA_LATENCY, 0); usb_pm_qos_is_latency_0 = true; } } else { if (usb_pm_qos_is_latency_0) { pm_qos_remove_request(&usb_pm_qos_latency); usb_pm_qos_is_latency_0 = false; } prcmu_qos_update_requirement(PRCMU_QOS_ARM_OPP, "usb", 25); } old_num_irqs = num_irqs; schedule_delayed_work_on(0, &ab->work_usb_workaround, msecs_to_jiffies(USB_PROBE_DELAY)); } static void ab8500_usb_regulator_ctrl(struct ab8500_usb *ab, bool sel_host, bool enable) { int ret = 0, volt = 0; if (enable) { regulator_enable(ab->v_ape); if (!is_ab8500_2p0_or_earlier(ab->ab8500)) { 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); } regulator_enable(ab->v_ulpi); 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); } regulator_enable(ab->v_musb); } else { regulator_disable(ab->v_musb); regulator_disable(ab->v_ulpi); regulator_disable(ab->v_ape); } } 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; wake_lock(&ab8500_musb_wakelock); clk_enable(ab->sysclk); ab8500_usb_regulator_ctrl(ab, sel_host, true); prcmu_qos_update_requirement(PRCMU_QOS_APE_OPP, (char *)dev_name(ab->dev), 100); schedule_delayed_work_on(0, &ab->work_usb_workaround, msecs_to_jiffies(USB_PROBE_DELAY)); abx500_mask_and_set_register_interruptible(ab->dev, AB8500_USB, AB8500_USB_PHY_CTRL_REG, bit, bit); } 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_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(ab->sysclk); ab8500_usb_regulator_ctrl(ab, sel_host, false); prcmu_qos_update_requirement(PRCMU_QOS_APE_OPP, (char *)dev_name(ab->dev), 50); if (!sel_host) { cancel_delayed_work_sync(&ab->work_usb_workaround); prcmu_qos_update_requirement(PRCMU_QOS_ARM_OPP, "usb", 25); } wake_unlock(&ab8500_musb_wakelock); } #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 usb_phy_events event=0; dev_dbg(ab->dev, "ab8505_usb_link_status_update %d\n", lsts); switch (lsts) { case USB_LINK_ACA_RID_B_8505: event = USB_EVENT_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: if (ab->mode == USB_PERIPHERAL) atomic_notifier_call_chain(&ab->phy.notifier, USB_EVENT_CLEAN, &ab->vbus_draw); ab->mode = USB_IDLE; ab->phy.otg->default_a = false; ab->vbus_draw = 0; if (event != USB_EVENT_RIDB) event = USB_EVENT_NONE; break; case USB_LINK_ACA_RID_C_NM_8505: event = USB_EVENT_RIDC; case USB_LINK_STD_HOST_NC_8505: case USB_LINK_STD_HOST_C_NS_8505: case USB_LINK_STD_HOST_C_S_8505: if (ab->mode == USB_HOST) { ab->mode = USB_PERIPHERAL; ab8500_usb_host_phy_dis(ab); atomic_notifier_call_chain(&ab->phy.notifier, USB_EVENT_CLEAN, &ab->vbus_draw); ab8500_usb_peri_phy_en(ab); } if (ab->mode == USB_IDLE) { ab->mode = USB_PERIPHERAL; atomic_notifier_call_chain(&ab->phy.notifier, USB_EVENT_PREPARE, &ab->vbus_draw); ab8500_usb_peri_phy_en(ab); } if (event != USB_EVENT_RIDC) event = USB_EVENT_VBUS; break; case USB_LINK_ACA_RID_A_8505: event = USB_EVENT_RIDA; case USB_LINK_HM_IDGND_8505: if (ab->mode == USB_PERIPHERAL) { ab->mode = USB_HOST; ab8500_usb_peri_phy_dis(ab); atomic_notifier_call_chain(&ab->phy.notifier, USB_EVENT_PREPARE, &ab->vbus_draw); ab8500_usb_host_phy_en(ab); } if (ab->mode == USB_IDLE) { ab->mode = USB_HOST; atomic_notifier_call_chain(&ab->phy.notifier, USB_EVENT_PREPARE, &ab->vbus_draw); ab8500_usb_host_phy_en(ab); } ab->phy.otg->default_a = true; if (event != USB_EVENT_RIDA) event = USB_EVENT_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 = USB_EVENT_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 usb_phy_events event=0; dev_dbg(ab->dev, "ab8500_usb_link_status_update %d\n", lsts); switch (lsts) { case USB_LINK_ACA_RID_B_8500: event = USB_EVENT_RIDB; case USB_LINK_NOT_CONFIGURED_8500: case USB_LINK_RESERVED_8500: case USB_LINK_NOT_VALID_LINK_8500: if (ab->mode == USB_PERIPHERAL) atomic_notifier_call_chain(&ab->phy.notifier, USB_EVENT_CLEAN, &ab->vbus_draw); ab->mode = USB_IDLE; ab->phy.otg->default_a = false; ab->vbus_draw = 0; if (event != USB_EVENT_RIDB) event = 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 = USB_EVENT_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_HOST) { ab->mode = USB_PERIPHERAL; ab8500_usb_host_phy_dis(ab); atomic_notifier_call_chain(&ab->phy.notifier, USB_EVENT_PREPARE, &ab->vbus_draw); ab8500_usb_peri_phy_en(ab); } if (ab->mode == USB_IDLE) { ab->mode = USB_PERIPHERAL; atomic_notifier_call_chain(&ab->phy.notifier, USB_EVENT_PREPARE, &ab->vbus_draw); ab8500_usb_peri_phy_en(ab); } if (event != USB_EVENT_RIDC) event = USB_EVENT_VBUS; break; case USB_LINK_ACA_RID_A_8500: event = USB_EVENT_RIDA; case USB_LINK_HM_IDGND_8500: if (ab->mode == USB_PERIPHERAL) { ab->mode = USB_HOST; ab8500_usb_peri_phy_dis(ab); atomic_notifier_call_chain(&ab->phy.notifier, USB_EVENT_PREPARE, &ab->vbus_draw); ab8500_usb_host_phy_en(ab); } if (ab->mode == USB_IDLE) { ab->mode = USB_HOST; atomic_notifier_call_chain(&ab->phy.notifier, USB_EVENT_PREPARE, &ab->vbus_draw); ab8500_usb_host_phy_en(ab); } ab->phy.otg->default_a = true; if (event != USB_EVENT_RIDA) event = USB_EVENT_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 = USB_EVENT_CHARGER; atomic_notifier_call_chain(&ab->phy.notifier, event, &ab->vbus_draw); break; } return 0; } static int abx500_usb_link_status_update(struct ab8500_usb *ab) { u8 reg; int ret = 0; if (!(ab->sysfs_flag)) { 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); } 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; } static void ab8500_usb_delayed_work(struct work_struct *work) { struct delayed_work *dwork = to_delayed_work(work); struct ab8500_usb *ab = container_of(dwork, struct ab8500_usb, dwork); abx500_usb_link_status_update(ab); } 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); } if (ab->mode == USB_PERIPHERAL) { atomic_notifier_call_chain(&ab->phy.notifier, event, &ab->vbus_draw); ab8500_usb_peri_phy_dis(ab); } 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_v20_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) { /* AB V2 has eye diagram issues when drawing more * than 100mA from VBUS.So setting charging current * to 100mA in case of standard host */ if (is_ab8500_2p0_or_earlier(ab->ab8500)) if (mA > 100) mA = 100; return mA; } #ifdef CONFIG_USB_OTG_20 static int ab8500_usb_start_srp(struct usb_phy *phy, unsigned mA) { struct ab8500_usb *ab; if (!phy) return -ENODEV; ab = phy_to_ab(phy); atomic_notifier_call_chain(&ab->phy.notifier, USB_EVENT_PREPARE, &ab->vbus_draw); ab8500_usb_peri_phy_en(ab); return 0; } #endif 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, USB_EVENT_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 (!gadget) 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 (!host) schedule_work(&ab->phy_dis_work); return 0; } /** * ab8500_usb_boot_detect : detect the USB cable during boot time. * @device: value for device. * * This function is used to detect the USB cable during boot time. */ static int ab8500_usb_boot_detect(struct ab8500_usb *ab) { /* Disabling PHY before selective enable or disable */ 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); return 0; } static void ab8500_usb_regulator_put(struct ab8500_usb *ab) { if (ab->v_ape) regulator_put(ab->v_ape); if (ab->v_ulpi) regulator_put(ab->v_ulpi); if (ab->v_musb) regulator_put(ab->v_musb); } static int ab8500_usb_regulator_get(struct ab8500_usb *ab) { int err; ab->v_ape = 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 = 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 = 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 void ab8500_usb_irq_free(struct ab8500_usb *ab) { if (ab->irq_num_id_rise) free_irq(ab->irq_num_id_rise, ab); if (ab->irq_num_id_fall) free_irq(ab->irq_num_id_fall, ab); if (ab->irq_num_vbus_rise) free_irq(ab->irq_num_vbus_rise, ab); if (ab->irq_num_vbus_fall) free_irq(ab->irq_num_vbus_fall, ab); if (ab->irq_num_link_status) free_irq(ab->irq_num_link_status, ab); } static int ab8500_usb_irq_setup(struct platform_device *pdev, struct ab8500_usb *ab) { int err; int irq; if (!is_ab8500_1p0_or_earlier(ab->ab8500)) { irq = platform_get_irq_byname(pdev, "USB_LINK_STATUS"); if (irq < 0) { err = irq; dev_err(&pdev->dev, "Link status irq not found\n"); goto irq_fail; } err = request_threaded_irq(irq, NULL, ab8500_usb_v20_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; } ab->irq_num_link_status = irq; } irq = platform_get_irq_byname(pdev, "ID_WAKEUP_F"); if (irq < 0) { err = irq; dev_err(&pdev->dev, "ID fall irq not found\n"); return ab->irq_num_id_fall; } err = request_threaded_irq(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"); goto irq_fail; } ab->irq_num_id_fall = irq; irq = platform_get_irq_byname(pdev, "VBUS_DET_F"); if (irq < 0) { err = irq; dev_err(&pdev->dev, "VBUS fall irq not found\n"); goto irq_fail; } err = request_threaded_irq(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"); goto irq_fail; } ab->irq_num_vbus_fall = irq; return 0; irq_fail: ab8500_usb_irq_free(ab); return err; } /* Sys interfaces */ static ssize_t serial_number_show(struct device *dev, struct device_attribute *attr, char *buf) { u32 bufer[5]; void __iomem *backup_ram = NULL; backup_ram = ioremap(PUBLIC_ID_BACKUPRAM1, 0x14); if (backup_ram) { bufer[0] = readl(backup_ram); bufer[1] = readl(backup_ram + 4); bufer[2] = readl(backup_ram + 8); bufer[3] = readl(backup_ram + 0x0c); bufer[4] = readl(backup_ram + 0x10); snprintf(buf, MAX_USB_SERIAL_NUMBER_LEN+1, "%.8X%.8X%.8X%.8X%.8X", bufer[0], bufer[1], bufer[2], bufer[3], bufer[4]); iounmap(backup_ram); } else dev_err(dev, "$$\n"); return strlen(buf); } static DEVICE_ATTR(serial_number, 0644, serial_number_show, NULL); static ssize_t boot_time_device_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ab8500_usb *ab = dev_get_drvdata(dev); u8 val = ab->sysfs_flag; snprintf(buf, 2, "%d", val); return strlen(buf); } static ssize_t boot_time_device_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t n) { struct ab8500_usb *ab = dev_get_drvdata(dev); ab->sysfs_flag = false; abx500_usb_link_status_update(ab); return n; } static DEVICE_ATTR(boot_time_device, 0644, boot_time_device_show, boot_time_device_store); static struct attribute *ab8500_usb_attributes[] = { &dev_attr_serial_number.attr, &dev_attr_boot_time_device.attr, NULL }; static const struct attribute_group ab8500_attr_group = { .attrs = ab8500_usb_attributes, }; static int ab8500_create_sysfsentries(struct ab8500_usb *ab) { int err; err = sysfs_create_group(&ab->dev->kobj, &ab8500_attr_group); if (err) sysfs_remove_group(&ab->dev->kobj, &ab8500_attr_group); return err; } static int __devinit ab8500_usb_probe(struct platform_device *pdev) { struct ab8500_usb *ab; struct ab8500 *ab8500; struct usb_otg *otg; int err; int rev; int ret = -1; 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 = kzalloc(sizeof *ab, GFP_KERNEL); if (!ab) return -ENOMEM; otg = kzalloc(sizeof *otg, GFP_KERNEL); if (!otg) { kfree(ab); 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_B_IDLE; otg->phy = &ab->phy; otg->set_host = ab8500_usb_set_host; otg->set_peripheral = ab8500_usb_set_peripheral; #ifdef CONFIG_USB_OTG_20 ab->otg.start_srp = ab8500_usb_start_srp; #endif ab->sysfs_flag = true; platform_set_drvdata(pdev, ab); dev_set_drvdata(ab->dev, ab); ATOMIC_INIT_NOTIFIER_HEAD(&ab->phy.notifier); /* v1: Wait for link status to become stable. * all: Updates form set_host and set_peripheral as they are atomic. */ INIT_DELAYED_WORK(&ab->dwork, ab8500_usb_delayed_work); /* all: Disable phy when called from set_host and set_peripheral */ INIT_WORK(&ab->phy_dis_work, ab8500_usb_phy_disable_work); INIT_DELAYED_WORK_DEFERRABLE(&ab->work_usb_workaround, ab8500_usb_load); err = ab8500_usb_regulator_get(ab); if (err) goto fail0; ab->sysclk = clk_get(ab->dev, "sysclk"); if (IS_ERR(ab->sysclk)) { err = PTR_ERR(ab->sysclk); goto fail1; } err = ab8500_usb_irq_setup(pdev, ab); if (err < 0) goto fail2; err = usb_set_transceiver(&ab->phy); if (err) { dev_err(&pdev->dev, "Can't register transceiver\n"); goto fail3; } /* Write Phy tuning values */ if (!is_ab8500_2p0_or_earlier(ab->ab8500)) { /* Enable the PBT/Bank 0x12 access */ ret = abx500_set_register_interruptible(ab->dev, AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01); if (ret < 0) printk(KERN_ERR "Failed to enable bank12" " access ret=%d\n", ret); ret = abx500_set_register_interruptible(ab->dev, AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8); if (ret < 0) printk(KERN_ERR "Failed to set PHY_TUNE1" " register ret=%d\n", ret); ret = abx500_set_register_interruptible(ab->dev, AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x00); if (ret < 0) printk(KERN_ERR "Failed to set PHY_TUNE2" " register ret=%d\n", ret); ret = abx500_set_register_interruptible(ab->dev, AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x78); if (ret < 0) printk(KERN_ERR "Failed to set PHY_TUNE3" " regester ret=%d\n", ret); /* Switch to normal mode/disable Bank 0x12 access */ ret = abx500_set_register_interruptible(ab->dev, AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00); if (ret < 0) printk(KERN_ERR "Failed to switch bank12" " access ret=%d\n", ret); } /* Needed to enable ID detection. */ ab8500_usb_wd_workaround(ab); prcmu_qos_add_requirement(PRCMU_QOS_APE_OPP, (char *)dev_name(ab->dev), 50); dev_info(&pdev->dev, "revision 0x%2x driver initialized\n", rev); prcmu_qos_add_requirement(PRCMU_QOS_ARM_OPP, "usb", 25); wake_lock_init(&ab8500_musb_wakelock, WAKE_LOCK_SUSPEND, "ab8500-usb"); err = ab8500_usb_boot_detect(ab); if (err < 0) goto fail3; err = ab8500_create_sysfsentries(ab); if (err) goto fail3; return 0; fail3: ab8500_usb_irq_free(ab); fail2: clk_put(ab->sysclk); fail1: ab8500_usb_regulator_put(ab); fail0: kfree(otg); kfree(ab); return err; } static int __devexit ab8500_usb_remove(struct platform_device *pdev) { struct ab8500_usb *ab = platform_get_drvdata(pdev); ab8500_usb_irq_free(ab); cancel_delayed_work_sync(&ab->dwork); cancel_work_sync(&ab->phy_dis_work); usb_set_transceiver(NULL); if (ab->mode == USB_HOST) ab8500_usb_host_phy_dis(ab); else if (ab->mode == USB_PERIPHERAL) ab8500_usb_peri_phy_dis(ab); clk_put(ab->sysclk); ab8500_usb_regulator_put(ab); platform_set_drvdata(pdev, NULL); kfree(ab->phy.otg); kfree(ab); return 0; } static struct platform_driver ab8500_usb_driver = { .probe = ab8500_usb_probe, .remove = __devexit_p(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");