/* * Copyright (C) 2005-2010 Freescale Semiconductor, Inc. All Rights Reserved. * * Author: Li Yang * Jerry Huang * * Initialization based on code from Shlomi Gridish. * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "fsl_otg.h" #define CONFIG_USB_OTG_DEBUG_FILES #define DRIVER_VERSION "$Revision: 1.55 $" #define DRIVER_AUTHOR "Jerry Huang/Li Yang" #define DRIVER_DESC "Freescale USB OTG Driver" #define DRIVER_INFO DRIVER_VERSION " " DRIVER_DESC #define TIMER_FREQ 1000 /* 1000 ms */ #define IDLE_TIME 5000 /* 5000 ms */ MODULE_DESCRIPTION("Freescale USB OTG Driver"); static const char driver_name[] = "fsl-usb2-otg"; const pm_message_t otg_suspend_state = { .event = 1, }; #define HA_DATA_PULSE 1 volatile static struct usb_dr_mmap *usb_dr_regs; static struct fsl_otg *fsl_otg_dev; static int srp_wait_done; static int gpio_id; /* FSM timers */ struct fsl_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr, *a_aidl_bdis_tmr, *b_ase0_brst_tmr, *b_se0_srp_tmr; /* Driver specific timers */ struct fsl_otg_timer *b_data_pulse_tmr, *b_vbus_pulse_tmr, *b_srp_fail_tmr, *b_srp_wait_tmr, *a_wait_enum_tmr; static struct list_head active_timers; static struct fsl_otg_config fsl_otg_initdata = { .otg_port = 1, }; /* the timer is used to monitor the otg loading, if idle for some times * we will close the otg clk */ static unsigned long last_busy; static bool clk_stopped; static struct timer_list monitor_timer; int write_ulpi(u8 addr, u8 data) { u32 temp; temp = 0x60000000 | (addr << 16) | data; temp = cpu_to_le32(temp); usb_dr_regs->ulpiview = temp; return 0; } /* prototype declaration */ void fsl_otg_add_timer(void *timer); void fsl_otg_del_timer(void *timer); /* -------------------------------------------------------------*/ /* Operations that will be called from OTG Finite State Machine */ /* Charge vbus for vbus pulsing in SRP */ void fsl_otg_chrg_vbus(int on) { if (on) usb_dr_regs->otgsc = cpu_to_le32((le32_to_cpu(usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK & ~OTGSC_CTRL_VBUS_DISCHARGE) | OTGSC_CTRL_VBUS_CHARGE); else usb_dr_regs->otgsc = cpu_to_le32((le32_to_cpu(usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK & ~OTGSC_CTRL_VBUS_CHARGE)); } /* Discharge vbus through a resistor to ground */ void fsl_otg_dischrg_vbus(int on) { if (on) usb_dr_regs->otgsc = cpu_to_le32((le32_to_cpu(usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK) | OTGSC_CTRL_VBUS_DISCHARGE); else usb_dr_regs->otgsc = cpu_to_le32((le32_to_cpu(usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK & ~OTGSC_CTRL_VBUS_DISCHARGE)); } /* A-device driver vbus, controlled through PP bit in PORTSC */ void fsl_otg_drv_vbus(struct fsl_usb2_platform_data *pdata, int on) { if (pdata->xcvr_ops && pdata->xcvr_ops->set_vbus_power) pdata->xcvr_ops->set_vbus_power(pdata->xcvr_ops, pdata, on); } /* * Pull-up D+, signalling connect by periperal. Also used in * data-line pulsing in SRP */ void fsl_otg_loc_conn(int on) { if (on) usb_dr_regs->otgsc = cpu_to_le32((le32_to_cpu(usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK) | OTGSC_CTRL_DATA_PULSING); else usb_dr_regs->otgsc = cpu_to_le32(le32_to_cpu(usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK & ~OTGSC_CTRL_DATA_PULSING); } /* Generate SOF by host. This is controlled through suspend/resume the * port. In host mode, controller will automatically send SOF. * Suspend will block the data on the port. */ void fsl_otg_loc_sof(int on) { u32 tmpval; tmpval = readl(&fsl_otg_dev->dr_mem_map->portsc) & ~PORTSC_W1C_BITS; if (on) tmpval |= PORTSC_PORT_FORCE_RESUME; else tmpval |= PORTSC_PORT_SUSPEND; writel(tmpval, &fsl_otg_dev->dr_mem_map->portsc); } /* Start SRP pulsing by data-line pulsing, followed with v-bus pulsing. */ void fsl_otg_start_pulse(void) { srp_wait_done = 0; #ifdef HA_DATA_PULSE usb_dr_regs->otgsc = cpu_to_le32((le32_to_cpu(usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK) | OTGSC_HA_DATA_PULSE); #else fsl_otg_loc_conn(1); #endif fsl_otg_add_timer(b_data_pulse_tmr); } void fsl_otg_pulse_vbus(void); void b_data_pulse_end(unsigned long foo) { #ifdef HA_DATA_PULSE #else fsl_otg_loc_conn(0); #endif /* Do VBUS pulse after data pulse */ fsl_otg_pulse_vbus(); } void fsl_otg_pulse_vbus(void) { srp_wait_done = 0; fsl_otg_chrg_vbus(1); /* start the timer to end vbus charge */ fsl_otg_add_timer(b_vbus_pulse_tmr); } void b_vbus_pulse_end(unsigned long foo) { fsl_otg_chrg_vbus(0); /* As USB3300 using the same a_sess_vld and b_sess_vld voltage * we need to discharge the bus for a while to distinguish * residual voltage of vbus pulsing and A device pull up */ fsl_otg_dischrg_vbus(1); fsl_otg_add_timer(b_srp_wait_tmr); } void b_srp_end(unsigned long foo) { fsl_otg_dischrg_vbus(0); srp_wait_done = 1; if ((fsl_otg_dev->otg.state == OTG_STATE_B_SRP_INIT) && fsl_otg_dev->fsm.b_sess_vld) fsl_otg_dev->fsm.b_srp_done = 1; } /* Workaround for a_host suspending too fast. When a_bus_req=0, * a_host will start by SRP. It needs to set b_hnp_enable before * actually suspending to start HNP */ void a_wait_enum(unsigned long foo) { VDBG("a_wait_enum timeout\n"); if (!fsl_otg_dev->otg.host->b_hnp_enable) fsl_otg_add_timer(a_wait_enum_tmr); else otg_statemachine(&fsl_otg_dev->fsm); } /* ------------------------------------------------------*/ /* The timeout callback function to set time out bit */ void set_tmout(unsigned long indicator) { *(int *)indicator = 1; } /* Initialize timers */ int fsl_otg_init_timers(struct otg_fsm *fsm) { /* FSM used timers */ a_wait_vrise_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_VRISE, (unsigned long)&fsm->a_wait_vrise_tmout); if (a_wait_vrise_tmr == NULL) return -ENOMEM; a_wait_bcon_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_BCON, (unsigned long)&fsm->a_wait_bcon_tmout); if (a_wait_bcon_tmr == NULL) return -ENOMEM; a_aidl_bdis_tmr = otg_timer_initializer(&set_tmout, TA_AIDL_BDIS, (unsigned long)&fsm->a_aidl_bdis_tmout); if (a_aidl_bdis_tmr == NULL) return -ENOMEM; b_ase0_brst_tmr = otg_timer_initializer(&set_tmout, TB_ASE0_BRST, (unsigned long)&fsm->b_ase0_brst_tmout); if (b_ase0_brst_tmr == NULL) return -ENOMEM; b_se0_srp_tmr = otg_timer_initializer(&set_tmout, TB_SE0_SRP, (unsigned long)&fsm->b_se0_srp); if (b_se0_srp_tmr == NULL) return -ENOMEM; b_srp_fail_tmr = otg_timer_initializer(&set_tmout, TB_SRP_FAIL, (unsigned long)&fsm->b_srp_done); if (b_srp_fail_tmr == NULL) return -ENOMEM; a_wait_enum_tmr = otg_timer_initializer(&a_wait_enum, 10, (unsigned long)&fsm); if (a_wait_enum_tmr == NULL) return -ENOMEM; /* device driver used timers */ b_srp_wait_tmr = otg_timer_initializer(&b_srp_end, TB_SRP_WAIT, 0); if (b_srp_wait_tmr == NULL) return -ENOMEM; b_data_pulse_tmr = otg_timer_initializer(&b_data_pulse_end, TB_DATA_PLS, 0); if (b_data_pulse_tmr == NULL) return -ENOMEM; b_vbus_pulse_tmr = otg_timer_initializer(&b_vbus_pulse_end, TB_VBUS_PLS, 0); if (b_vbus_pulse_tmr == NULL) return -ENOMEM; return 0; } /* Uninitialize timers */ void fsl_otg_uninit_timers(void) { /* FSM used timers */ if (a_wait_vrise_tmr != NULL) kfree(a_wait_vrise_tmr); if (a_wait_bcon_tmr != NULL) kfree(a_wait_bcon_tmr); if (a_aidl_bdis_tmr != NULL) kfree(a_aidl_bdis_tmr); if (b_ase0_brst_tmr != NULL) kfree(b_ase0_brst_tmr); if (b_se0_srp_tmr != NULL) kfree(b_se0_srp_tmr); if (b_srp_fail_tmr != NULL) kfree(b_srp_fail_tmr); if (a_wait_enum_tmr != NULL) kfree(a_wait_enum_tmr); /* device driver used timers */ if (b_srp_wait_tmr != NULL) kfree(b_srp_wait_tmr); if (b_data_pulse_tmr != NULL) kfree(b_data_pulse_tmr); if (b_vbus_pulse_tmr != NULL) kfree(b_vbus_pulse_tmr); } /* Add timer to timer list */ void fsl_otg_add_timer(void *gtimer) { struct fsl_otg_timer *timer = (struct fsl_otg_timer *)gtimer; struct fsl_otg_timer *tmp_timer; /* Check if the timer is already in the active list, * if so update timer count */ list_for_each_entry(tmp_timer, &active_timers, list) if (tmp_timer == timer) { timer->count = timer->expires; return; } timer->count = timer->expires; list_add_tail(&timer->list, &active_timers); } /* Remove timer from the timer list; clear timeout status */ void fsl_otg_del_timer(void *gtimer) { struct fsl_otg_timer *timer = (struct fsl_otg_timer *)gtimer; struct fsl_otg_timer *tmp_timer, *del_tmp; list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list) if (tmp_timer == timer) list_del(&timer->list); } /* Reduce timer count by 1, and find timeout conditions. * Called by fsl_otg 1ms timer interrupt */ int fsl_otg_tick_timer(void) { struct fsl_otg_timer *tmp_timer, *del_tmp; int expired = 0; list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list) { tmp_timer->count--; /* check if timer expires */ if (!tmp_timer->count) { list_del(&tmp_timer->list); tmp_timer->function(tmp_timer->data); expired = 1; } } return expired; } static void fsl_otg_clk_gate(bool on) { struct device *dev = fsl_otg_dev->otg.dev; struct fsl_usb2_platform_data *pdata; if (dev) { pdata = dev->platform_data; if (pdata && pdata->usb_clock_for_pm) pdata->usb_clock_for_pm(on); } } static void fsl_otg_clk_ctl(void) { if (clk_stopped) { fsl_otg_clk_gate(true); clk_stopped = false; } last_busy = jiffies; } static void fsl_otg_loading_monitor(unsigned long data) { unsigned long now = jiffies; if (!clk_stopped) { if (time_after(now, last_busy + msecs_to_jiffies(IDLE_TIME))) { clk_stopped = true; fsl_otg_clk_gate(false); } } mod_timer(&monitor_timer, jiffies + msecs_to_jiffies(TIMER_FREQ)); } /** * Enable vbus interrupt * The otg cares USB_ID interrupt * The device cares B Session Valid */ static void b_session_irq_enable(bool enable) { int osc = le32_to_cpu(usb_dr_regs->otgsc); printk(KERN_DEBUG "%s:enable is %d\n", __func__, enable); /* The other interrupts' status should not be cleared */ osc &= ~(OTGSC_INTSTS_USB_ID | OTGSC_INTSTS_A_VBUS_VALID | OTGSC_INTSTS_A_SESSION_VALID | OTGSC_INTSTS_B_SESSION_VALID); osc |= OTGSC_INTSTS_B_SESSION_VALID; if (enable) osc |= OTGSC_INTR_B_SESSION_VALID_EN; else osc &= ~OTGSC_INTR_B_SESSION_VALID_EN; usb_dr_regs->otgsc = cpu_to_le32(osc); } /* Reset controller, not reset the bus */ void otg_reset_controller(void) { u32 command; command = readl(&usb_dr_regs->usbcmd); command |= (1 << 1); writel(command, &usb_dr_regs->usbcmd); while (readl(&usb_dr_regs->usbcmd) & (1 << 1)) ; } /* Call suspend/resume routines in host driver */ int fsl_otg_start_host(struct otg_fsm *fsm, int on) { struct otg_transceiver *xceiv = fsm->transceiver; struct device *dev; struct fsl_otg *otg_dev = container_of(xceiv, struct fsl_otg, otg); struct platform_driver *host_pdrv; struct platform_device *host_pdev; u32 retval = 0; if (!xceiv->host) return -ENODEV; dev = xceiv->host->controller; host_pdrv = container_of((dev->driver), struct platform_driver, driver); host_pdev = to_platform_device(dev); /* Update a_vbus_vld state as a_vbus_vld int is disabled * in device mode */ fsm->a_vbus_vld = (le32_to_cpu(usb_dr_regs->otgsc) & OTGSC_STS_A_VBUS_VALID) ? 1 : 0; if (on) { /* start fsl usb host controller */ if (otg_dev->host_working) goto end; else { otg_reset_controller(); VDBG("host on......\n"); if (host_pdrv->resume) { retval = host_pdrv->resume(host_pdev); if (fsm->id) { /* default-b */ fsl_otg_drv_vbus(dev->platform_data, 1); /* Workaround: b_host can't driver * vbus, but PP in PORTSC needs to * be 1 for host to work. * So we set drv_vbus bit in * transceiver to 0 thru ULPI. */ #if defined(CONFIG_ISP1504_MXC) write_ulpi(0x0c, 0x20); #endif } } otg_dev->host_working = 1; } } else { /* stop fsl usb host controller */ if (!otg_dev->host_working) goto end; else { VDBG("host off......\n"); if (host_pdrv->suspend) { retval = host_pdrv->suspend(host_pdev, otg_suspend_state); if (fsm->id) /* default-b */ fsl_otg_drv_vbus(dev->platform_data, 0); } otg_dev->host_working = 0; } } end: return retval; } /* Call suspend and resume function in udc driver * to stop and start udc driver. */ int fsl_otg_start_gadget(struct otg_fsm *fsm, int on) { struct otg_transceiver *xceiv = fsm->transceiver; struct device *dev; struct platform_driver *gadget_pdrv; struct platform_device *gadget_pdev; if (!xceiv->gadget || !xceiv->gadget->dev.parent) return -ENODEV; VDBG("gadget %s \n", on ? "on" : "off"); dev = xceiv->gadget->dev.parent; gadget_pdrv = container_of((dev->driver), struct platform_driver, driver); gadget_pdev = to_platform_device(dev); if (on) gadget_pdrv->resume(gadget_pdev); else gadget_pdrv->suspend(gadget_pdev, otg_suspend_state); return 0; } /* Called by initialization code of host driver. Register host controller * to the OTG. Suspend host for OTG role detection. */ static int fsl_otg_set_host(struct otg_transceiver *otg_p, struct usb_bus *host) { struct fsl_otg *otg_dev = container_of(otg_p, struct fsl_otg, otg); if (!otg_p || otg_dev != fsl_otg_dev) return -ENODEV; otg_p->host = host; otg_dev->fsm.a_bus_drop = 0; otg_dev->fsm.a_bus_req = 1; if (host) { VDBG("host off......\n"); otg_p->host->otg_port = fsl_otg_initdata.otg_port; otg_p->host->is_b_host = otg_dev->fsm.id; /* must leave time for khubd to finish its thing * before yanking the host driver out from under it, * so suspend the host after a short delay. */ otg_dev->host_working = 1; schedule_delayed_work(&otg_dev->otg_event, 100); return 0; } else { /* host driver going away */ if (!(le32_to_cpu(otg_dev->dr_mem_map->otgsc) & OTGSC_STS_USB_ID)) { /* Mini-A cable connected */ struct otg_fsm *fsm = &otg_dev->fsm; otg_p->state = OTG_STATE_UNDEFINED; fsm->protocol = PROTO_UNDEF; } if (gpio_id) { if (gpio_get_value(gpio_id)) { struct otg_fsm *fsm = &otg_dev->fsm; otg_p->state = OTG_STATE_UNDEFINED; fsm->protocol = PROTO_UNDEF; } } } otg_dev->host_working = 0; otg_statemachine(&otg_dev->fsm); return 0; } /* Called by initialization code of udc. Register udc to OTG.*/ static int fsl_otg_set_peripheral(struct otg_transceiver *otg_p, struct usb_gadget *gadget) { struct fsl_otg *otg_dev = container_of(otg_p, struct fsl_otg, otg); VDBG("otg_dev 0x%x\n", (int)otg_dev); VDBG("fsl_otg_dev 0x%x\n", (int)fsl_otg_dev); if (!otg_p || otg_dev != fsl_otg_dev) return -ENODEV; if (!gadget) { if (!otg_dev->otg.default_a) otg_p->gadget->ops->vbus_draw(otg_p->gadget, 0); usb_gadget_vbus_disconnect(otg_dev->otg.gadget); otg_dev->otg.gadget = 0; otg_dev->fsm.b_bus_req = 0; otg_statemachine(&otg_dev->fsm); return 0; } #ifdef DEBUG /* * debug the initial state of the ID pin when only * the gadget driver is loaded and no cable is connected. * sometimes, we get an ID irq right * after the udc driver's otg_get_transceiver() call * that indicates that IDpin=0, which means a Mini-A * connector is attached. not good. */ DBG("before: fsm.id ID pin=%d", otg_dev->fsm.id); otg_dev->fsm.id = (otg_dev->dr_mem_map->otgsc & OTGSC_STS_USB_ID) ? 1 : 0; DBG("after: fsm.id ID pin=%d", otg_dev->fsm.id); /*if (!otg_dev->fsm.id) { printk("OTG Control = 0x%x\n", isp1504_read(ISP1504_OTGCTL, &otg_dev->dr_mem_map->ulpiview)); } */ #endif otg_p->gadget = gadget; otg_p->gadget->is_a_peripheral = !otg_dev->fsm.id; otg_dev->fsm.b_bus_req = 1; /* start the gadget right away if the ID pin says Mini-B */ DBG("ID pin=%d\n", otg_dev->fsm.id); if (otg_dev->fsm.id == 1) { fsl_otg_start_host(&otg_dev->fsm, 0); otg_drv_vbus(&otg_dev->fsm, 0); fsl_otg_start_gadget(&otg_dev->fsm, 1); } return 0; } /* Set OTG port power, only for B-device */ static int fsl_otg_set_power(struct otg_transceiver *otg_p, unsigned mA) { if (!fsl_otg_dev) return -ENODEV; if (otg_p->state == OTG_STATE_B_PERIPHERAL) printk(KERN_INFO "FSL OTG:Draw %d mA\n", mA); return 0; } /* Delayed pin detect interrupt processing. * * When the Mini-A cable is disconnected from the board, * the pin-detect interrupt happens before the disconnnect * interrupts for the connected device(s). In order to * process the disconnect interrupt(s) prior to switching * roles, the pin-detect interrupts are delayed, and handled * by this routine. */ static void fsl_otg_event(struct work_struct *work) { struct fsl_otg *og = container_of(work, struct fsl_otg, otg_event.work); struct otg_fsm *fsm = &og->fsm; struct otg_transceiver *otg = &og->otg; otg->default_a = (fsm->id == 0); /* clear conn information */ if (fsm->id) fsm->b_conn = 0; else fsm->a_conn = 0; if (otg->host) otg->host->is_b_host = fsm->id; if (otg->gadget) otg->gadget->is_a_peripheral = !fsm->id; if (fsm->id) { /* switch to gadget */ fsl_otg_start_host(fsm, 0); otg_drv_vbus(fsm, 0); fsl_otg_start_gadget(fsm, 1); } else { /* switch to host */ fsl_otg_start_gadget(fsm, 0); otg_drv_vbus(fsm, 1); fsl_otg_start_host(fsm, 1); } } /* B-device start SRP */ static int fsl_otg_start_srp(struct otg_transceiver *otg_p) { struct fsl_otg *otg_dev = container_of(otg_p, struct fsl_otg, otg); if (!otg_p || otg_dev != fsl_otg_dev || otg_p->state != OTG_STATE_B_IDLE) return -ENODEV; otg_dev->fsm.b_bus_req = 1; otg_statemachine(&otg_dev->fsm); return 0; } /* A_host suspend will call this function to start hnp */ static int fsl_otg_start_hnp(struct otg_transceiver *otg_p) { struct fsl_otg *otg_dev = container_of(otg_p, struct fsl_otg, otg); if (!otg_p || otg_dev != fsl_otg_dev) return -ENODEV; /* printk("start_hnp.............\n"); */ /* clear a_bus_req to enter a_suspend state */ otg_dev->fsm.a_bus_req = 0; otg_statemachine(&otg_dev->fsm); return 0; } /* Interrupt handler for gpio id pin */ irqreturn_t fsl_otg_isr_gpio(int irq, void *dev_id) { struct otg_fsm *fsm; struct fsl_usb2_platform_data *pdata = (struct fsl_usb2_platform_data *)dev_id; struct fsl_otg *f_otg; struct otg_transceiver *otg_trans = otg_get_transceiver(); int value; f_otg = container_of(otg_trans, struct fsl_otg, otg); fsm = &f_otg->fsm; fsl_otg_clk_ctl(); if (pdata->id_gpio == 0) return IRQ_NONE; value = gpio_get_value(pdata->id_gpio) ? 1 : 0; if (value) set_irq_type(gpio_to_irq(pdata->id_gpio), IRQ_TYPE_LEVEL_LOW); else set_irq_type(gpio_to_irq(pdata->id_gpio), IRQ_TYPE_LEVEL_HIGH); if (value == f_otg->fsm.id) return IRQ_HANDLED; f_otg->fsm.id = value; cancel_delayed_work(&f_otg->otg_event); schedule_delayed_work(&f_otg->otg_event, msecs_to_jiffies(10)); /* if host mode, we should clear B_SESSION_VLD event and disable * B_SESSION_VLD irq */ if (!f_otg->fsm.id) { b_session_irq_enable(false); } return IRQ_HANDLED; } /* Interrupt handler. OTG/host/peripheral share the same int line. * OTG driver clears OTGSC interrupts and leaves USB interrupts * intact. It needs to have knowledge of some USB interrupts * such as port change. */ irqreturn_t fsl_otg_isr(int irq, void *dev_id) { struct fsl_otg *fotg = (struct fsl_otg *)dev_id; struct otg_transceiver *otg = &fotg->otg; u32 otg_int_src, otg_sc; irqreturn_t ret = IRQ_NONE; fsl_otg_clk_ctl(); otg_sc = le32_to_cpu(usb_dr_regs->otgsc); otg_int_src = otg_sc & OTGSC_INTSTS_MASK & (otg_sc >> 8); /* Only clear otg interrupts, expect B_SESSION_VALID, * Leave it to be handled by arcotg_udc */ usb_dr_regs->otgsc = ((usb_dr_regs->otgsc | cpu_to_le32(otg_sc & OTGSC_INTSTS_MASK))& (~OTGSC_INTSTS_B_SESSION_VALID)); /*FIXME: ID change not generate when init to 0 */ fotg->fsm.id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0; otg->default_a = (fotg->fsm.id == 0); /* process OTG interrupts */ if (otg_int_src) { if (otg_int_src & OTGSC_INTSTS_USB_ID) { fotg->fsm.id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0; printk(KERN_DEBUG "ID int (ID is %d)\n", fotg->fsm.id); cancel_delayed_work(&fotg->otg_event); schedule_delayed_work(&fotg->otg_event, msecs_to_jiffies(10)); /* if host mode, we should clear B_SESSION_VLD event and disable * B_SESSION_VLD irq */ if (!fotg->fsm.id) { b_session_irq_enable(false); } ret = IRQ_HANDLED; } } return ret; } static void fsl_otg_fsm_drv_vbus(int on) { struct otg_fsm *fsm = &(fsl_otg_dev->fsm); struct otg_transceiver *xceiv = fsm->transceiver; struct device *dev; /* * The host is assigned at otg_set_host */ if (!xceiv->host) return; /* * The dev is assigned at usb_create_hcd which is called earlier * than otg_set_host at host driver's probe */ dev = xceiv->host->controller; fsl_otg_drv_vbus(dev->platform_data, on); } static struct otg_fsm_ops fsl_otg_ops = { .chrg_vbus = fsl_otg_chrg_vbus, .drv_vbus = fsl_otg_fsm_drv_vbus, .loc_conn = fsl_otg_loc_conn, .loc_sof = fsl_otg_loc_sof, .start_pulse = fsl_otg_start_pulse, .add_timer = fsl_otg_add_timer, .del_timer = fsl_otg_del_timer, .start_host = fsl_otg_start_host, .start_gadget = fsl_otg_start_gadget, }; /* Initialize the global variable fsl_otg_dev and request IRQ for OTG */ static int fsl_otg_conf(struct platform_device *pdev) { int status; struct fsl_otg *fsl_otg_tc; struct fsl_usb2_platform_data *pdata; pdata = pdev->dev.platform_data; DBG(); if (fsl_otg_dev) return 0; /* allocate space to fsl otg device */ fsl_otg_tc = kzalloc(sizeof(struct fsl_otg), GFP_KERNEL); if (!fsl_otg_tc) return -ENODEV; INIT_DELAYED_WORK(&fsl_otg_tc->otg_event, fsl_otg_event); INIT_LIST_HEAD(&active_timers); status = fsl_otg_init_timers(&fsl_otg_tc->fsm); if (status) { printk(KERN_INFO "Couldn't init OTG timers\n"); fsl_otg_uninit_timers(); kfree(fsl_otg_tc); return status; } spin_lock_init(&fsl_otg_tc->fsm.lock); /* Set OTG state machine operations */ fsl_otg_tc->fsm.ops = &fsl_otg_ops; /* initialize the otg structure */ fsl_otg_tc->otg.label = DRIVER_DESC; fsl_otg_tc->otg.set_host = fsl_otg_set_host; fsl_otg_tc->otg.set_peripheral = fsl_otg_set_peripheral; fsl_otg_tc->otg.set_power = fsl_otg_set_power; fsl_otg_tc->otg.start_hnp = fsl_otg_start_hnp; fsl_otg_tc->otg.start_srp = fsl_otg_start_srp; fsl_otg_tc->otg.dev = &pdev->dev; fsl_otg_dev = fsl_otg_tc; /* Store the otg transceiver */ status = otg_set_transceiver(&fsl_otg_tc->otg); if (status) { printk(KERN_WARNING ": unable to register OTG transceiver.\n"); return status; } return 0; } /* OTG Initialization*/ int usb_otg_start(struct platform_device *pdev) { struct fsl_otg *p_otg; struct otg_transceiver *otg_trans = otg_get_transceiver(); struct otg_fsm *fsm; volatile unsigned long *p; int status; struct resource *res; u32 temp; struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data; p_otg = container_of(otg_trans, struct fsl_otg, otg); fsm = &p_otg->fsm; /* Initialize the state machine structure with default values */ SET_OTG_STATE(otg_trans, OTG_STATE_UNDEFINED); fsm->transceiver = &p_otg->otg; /* We don't require predefined MEM/IRQ resource index */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -ENXIO; /* We don't request_mem_region here to enable resource sharing * with host/device */ usb_dr_regs = ioremap(res->start, sizeof(struct usb_dr_mmap)); p_otg->dr_mem_map = (struct usb_dr_mmap *)usb_dr_regs; pdata->regs = (void *)usb_dr_regs; gpio_id = pdata->id_gpio; /* request irq */ if (pdata->id_gpio == 0) { p_otg->irq = platform_get_irq(pdev, 0); status = request_irq(p_otg->irq, fsl_otg_isr, IRQF_SHARED, driver_name, p_otg); } else { status = request_irq(gpio_to_irq(pdata->id_gpio), fsl_otg_isr_gpio, IRQF_SHARED, driver_name, pdata); } if (status) { dev_dbg(p_otg->otg.dev, "can't get IRQ %d, error %d\n", p_otg->irq, status); iounmap(p_otg->dr_mem_map); kfree(p_otg); return status; } if (pdata->platform_init && pdata->platform_init(pdev) != 0) return -EINVAL; clk_stopped = false; /* platform_init will open the otg clk */ /* stop the controller */ temp = readl(&p_otg->dr_mem_map->usbcmd); temp &= ~USB_CMD_RUN_STOP; writel(temp, &p_otg->dr_mem_map->usbcmd); /* reset the controller */ temp = readl(&p_otg->dr_mem_map->usbcmd); temp |= USB_CMD_CTRL_RESET; writel(temp, &p_otg->dr_mem_map->usbcmd); /* wait reset completed */ while (readl(&p_otg->dr_mem_map->usbcmd) & USB_CMD_CTRL_RESET) ; /* configure the VBUSHS as IDLE(both host and device) */ temp = USB_MODE_STREAM_DISABLE | (pdata->es ? USB_MODE_ES : 0); writel(temp, &p_otg->dr_mem_map->usbmode); /* configure PHY interface */ temp = readl(&p_otg->dr_mem_map->portsc); temp &= ~(PORTSC_PHY_TYPE_SEL | PORTSC_PTW); switch (pdata->phy_mode) { case FSL_USB2_PHY_ULPI: temp |= PORTSC_PTS_ULPI; break; case FSL_USB2_PHY_UTMI_WIDE: temp |= PORTSC_PTW_16BIT; /* fall through */ case FSL_USB2_PHY_UTMI: temp |= PORTSC_PTS_UTMI; /* fall through */ default: break; } writel(temp, &p_otg->dr_mem_map->portsc); if (pdata->have_sysif_regs) { /* configure control enable IO output, big endian register */ p = (volatile unsigned long *)(&p_otg->dr_mem_map->control); temp = *p; temp |= USB_CTRL_IOENB; *p = temp; } /* disable all interrupt and clear all OTGSC status */ temp = readl(&p_otg->dr_mem_map->otgsc); temp &= ~OTGSC_INTERRUPT_ENABLE_BITS_MASK; temp |= OTGSC_INTERRUPT_STATUS_BITS_MASK | OTGSC_CTRL_VBUS_DISCHARGE; writel(temp, &p_otg->dr_mem_map->otgsc); /* * The identification (id) input is FALSE when a Mini-A plug is inserted * in the devices Mini-AB receptacle. Otherwise, this input is TRUE. * Also: record initial state of ID pin */ if (le32_to_cpu(p_otg->dr_mem_map->otgsc) & OTGSC_STS_USB_ID) { p_otg->fsm.id = 1; } else { p_otg->fsm.id = 0; } if (pdata->id_gpio != 0) { p_otg->fsm.id = gpio_get_value(pdata->id_gpio) ? 1 : 0; if (p_otg->fsm.id) set_irq_type(gpio_to_irq(pdata->id_gpio), IRQ_TYPE_LEVEL_LOW); else set_irq_type(gpio_to_irq(pdata->id_gpio), IRQ_TYPE_LEVEL_HIGH); } p_otg->otg.state = p_otg->fsm.id ? OTG_STATE_UNDEFINED : OTG_STATE_A_IDLE; DBG("initial ID pin=%d\n", p_otg->fsm.id); /* enable OTG ID pin interrupt */ temp = readl(&p_otg->dr_mem_map->otgsc); if (!pdata->id_gpio) temp |= OTGSC_INTR_USB_ID_EN; temp &= ~(OTGSC_CTRL_VBUS_DISCHARGE | OTGSC_INTR_1MS_TIMER_EN); writel(temp, &p_otg->dr_mem_map->otgsc); return 0; } /*------------------------------------------------------------------------- PROC File System Support -------------------------------------------------------------------------*/ #ifdef CONFIG_USB_OTG_DEBUG_FILES #include static const char proc_filename[] = "driver/isp1504_otg"; static int otg_proc_read(char *page, char **start, off_t off, int count, int *eof, void *_dev) { struct otg_fsm *fsm = &fsl_otg_dev->fsm; char *buf = page; char *next = buf; unsigned size = count; unsigned long flags; int t; u32 tmp_reg; if (off != 0) return 0; spin_lock_irqsave(&fsm->lock, flags); /* ------basic driver infomation ---- */ t = scnprintf(next, size, DRIVER_DESC "\n" "fsl_usb2_otg version: %s\n\n", DRIVER_VERSION); size -= t; next += t; /* ------ Registers ----- */ tmp_reg = le32_to_cpu(usb_dr_regs->otgsc); t = scnprintf(next, size, "OTGSC reg: %08x\n", tmp_reg); size -= t; next += t; tmp_reg = le32_to_cpu(usb_dr_regs->portsc); t = scnprintf(next, size, "PORTSC reg: %08x\n", tmp_reg); size -= t; next += t; tmp_reg = le32_to_cpu(usb_dr_regs->usbmode); t = scnprintf(next, size, "USBMODE reg: %08x\n", tmp_reg); size -= t; next += t; tmp_reg = le32_to_cpu(usb_dr_regs->usbcmd); t = scnprintf(next, size, "USBCMD reg: %08x\n", tmp_reg); size -= t; next += t; tmp_reg = le32_to_cpu(usb_dr_regs->usbsts); t = scnprintf(next, size, "USBSTS reg: %08x\n", tmp_reg); size -= t; next += t; /* ------ State ----- */ t = scnprintf(next, size, "OTG state: %s\n\n", state_string(fsl_otg_dev->otg.state)); size -= t; next += t; #if 1 || defined DEBUG /* ------ State Machine Variables ----- */ t = scnprintf(next, size, "a_bus_req: %d\n", fsm->a_bus_req); size -= t; next += t; t = scnprintf(next, size, "b_bus_req: %d\n", fsm->b_bus_req); size -= t; next += t; t = scnprintf(next, size, "a_bus_resume: %d\n", fsm->a_bus_resume); size -= t; next += t; t = scnprintf(next, size, "a_bus_suspend: %d\n", fsm->a_bus_suspend); size -= t; next += t; t = scnprintf(next, size, "a_conn: %d\n", fsm->a_conn); size -= t; next += t; t = scnprintf(next, size, "a_sess_vld: %d\n", fsm->a_sess_vld); size -= t; next += t; t = scnprintf(next, size, "a_srp_det: %d\n", fsm->a_srp_det); size -= t; next += t; t = scnprintf(next, size, "a_vbus_vld: %d\n", fsm->a_vbus_vld); size -= t; next += t; t = scnprintf(next, size, "b_bus_resume: %d\n", fsm->b_bus_resume); size -= t; next += t; t = scnprintf(next, size, "b_bus_suspend: %d\n", fsm->b_bus_suspend); size -= t; next += t; t = scnprintf(next, size, "b_conn: %d\n", fsm->b_conn); size -= t; next += t; t = scnprintf(next, size, "b_se0_srp: %d\n", fsm->b_se0_srp); size -= t; next += t; t = scnprintf(next, size, "b_sess_end: %d\n", fsm->b_sess_end); size -= t; next += t; t = scnprintf(next, size, "b_sess_vld: %d\n", fsm->b_sess_vld); size -= t; next += t; t = scnprintf(next, size, "id: %d\n", fsm->id); size -= t; next += t; #endif spin_unlock_irqrestore(&fsm->lock, flags); *eof = 1; return count - size; } #define create_proc_file() create_proc_read_entry(proc_filename, \ 0, NULL, otg_proc_read, NULL) #define remove_proc_file() remove_proc_entry(proc_filename, NULL) #else /* !CONFIG_USB_OTG_DEBUG_FILES */ #define create_proc_file() do {} while (0) #define remove_proc_file() do {} while (0) #endif /*CONFIG_USB_OTG_DEBUG_FILES */ /*----------------------------------------------------------*/ /* Char driver interface to control some OTG input */ /* This function handle some ioctl command,such as get otg * status and set host suspend */ static int fsl_otg_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { u32 retval = 0; switch (cmd) { case GET_OTG_STATUS: retval = fsl_otg_dev->host_working; break; case SET_A_SUSPEND_REQ: fsl_otg_dev->fsm.a_suspend_req = arg; break; case SET_A_BUS_DROP: fsl_otg_dev->fsm.a_bus_drop = arg; break; case SET_A_BUS_REQ: fsl_otg_dev->fsm.a_bus_req = arg; break; case SET_B_BUS_REQ: fsl_otg_dev->fsm.b_bus_req = arg; break; default: break; } otg_statemachine(&fsl_otg_dev->fsm); return retval; } static int fsl_otg_open(struct inode *inode, struct file *file) { return 0; } static int fsl_otg_release(struct inode *inode, struct file *file) { return 0; } static struct file_operations otg_fops = { .owner = THIS_MODULE, .llseek = NULL, .read = NULL, .write = NULL, .ioctl = fsl_otg_ioctl, .open = fsl_otg_open, .release = fsl_otg_release, }; static int __init fsl_otg_probe(struct platform_device *pdev) { int status; struct fsl_usb2_platform_data *pdata; DBG("pdev=0x%p\n", pdev); if (!pdev) return -ENODEV; if (!pdev->dev.platform_data) return -ENOMEM; pdata = pdev->dev.platform_data; /* configure the OTG */ status = fsl_otg_conf(pdev); if (status) { printk(KERN_INFO "Couldn't init OTG module\n"); return -status; } /* start OTG */ status = usb_otg_start(pdev); if (register_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME, &otg_fops)) { printk(KERN_WARNING FSL_OTG_NAME ": unable to register FSL OTG device\n"); return -EIO; } last_busy = jiffies; setup_timer(&monitor_timer, fsl_otg_loading_monitor, (unsigned long)pdev); mod_timer(&monitor_timer, jiffies + msecs_to_jiffies(TIMER_FREQ)); create_proc_file(); return status; } static int fsl_otg_remove(struct platform_device *pdev) { struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data; otg_set_transceiver(NULL); free_irq(fsl_otg_dev->irq, fsl_otg_dev); iounmap((void *)usb_dr_regs); kfree(fsl_otg_dev); remove_proc_file(); unregister_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME); if (pdata->platform_uninit) pdata->platform_uninit(pdata); return 0; } struct platform_driver fsl_otg_driver = { .probe = fsl_otg_probe, .remove = fsl_otg_remove, .driver = { .name = driver_name, .owner = THIS_MODULE, }, }; /*-------------------------------------------------------------------------*/ static int __init fsl_usb_otg_init(void) { printk(KERN_INFO DRIVER_DESC " loaded, %s\n", DRIVER_VERSION); return platform_driver_register(&fsl_otg_driver); } static void __exit fsl_usb_otg_exit(void) { platform_driver_unregister(&fsl_otg_driver); printk(KERN_INFO DRIVER_DESC " unloaded\n"); } subsys_initcall(fsl_usb_otg_init); module_exit(fsl_usb_otg_exit); MODULE_DESCRIPTION(DRIVER_INFO); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_LICENSE("GPL");