static int _start(dwc_otg_hcd_t * hcd) { struct usb_hcd *usb_hcd = dwc_otg_hcd_to_hcd(hcd); usb_hcd->self.is_b_host = dwc_otg_hcd_is_b_host(hcd); hcd_start(usb_hcd); return 0; }
/** * This function handles the Connector ID Status Change Interrupt. It * reads the OTG Interrupt Register (GOTCTL) to determine whether this * is a Device to Host Mode transition or a Host Mode to Device * Transition. * * This only occurs when the cable is connected/removed from the PHY * connector. * * @param _core_if Programming view of DWC_otg controller. */ int32_t dwc_otg_handle_conn_id_status_change_intr(dwc_otg_core_if_t * _core_if) { uint32_t count = 0; gintsts_data_t gintsts = {.d32 = 0}; gintmsk_data_t gintmsk = {.d32 = 0}; gotgctl_data_t gotgctl = {.d32 = 0}; /* * Need to disable SOF interrupt immediately. If switching from device * to host, the PCD interrupt handler won't handle the interrupt if * host mode is already set. The HCD interrupt handler won't get * called if the HCD state is HALT. This means that the interrupt does * not get handled and Linux complains loudly. */ gintmsk.b.sofintr = 1; dwc_modify_reg32(&_core_if->core_global_regs->gintmsk, gintmsk.d32, 0); DWC_DEBUGPL(DBG_CIL, " ++Connector ID Status Change Interrupt++ (%s)\n", (dwc_otg_is_host_mode(_core_if) ? "Host" : "Device")); gotgctl.d32 = dwc_read_reg32(&_core_if->core_global_regs->gotgctl); DWC_DEBUGPL(DBG_CIL, "gotgctl=%0x\n", gotgctl.d32); DWC_DEBUGPL(DBG_CIL, "gotgctl.b.conidsts=%d\n", gotgctl.b.conidsts); /* B-Device connector (Device Mode) */ if (gotgctl.b.conidsts) { /* Wait for switch to device mode. */ while (!dwc_otg_is_device_mode(_core_if)) { DWC_PRINT("Waiting for Peripheral Mode, Mode=%s\n", (dwc_otg_is_host_mode(_core_if) ? "Host" : "Peripheral")); MDELAY(100); if (++count > 10000) *(uint32_t *) NULL = 0; } _core_if->op_state = B_PERIPHERAL; dwc_otg_core_init(_core_if); dwc_otg_enable_global_interrupts(_core_if); pcd_start(_core_if); } else { /* A-Device connector (Host Mode) */ while (!dwc_otg_is_host_mode(_core_if)) { DWC_PRINT("Waiting for Host Mode, Mode=%s\n", (dwc_otg_is_host_mode(_core_if) ? "Host" : "Peripheral")); MDELAY(100); if (++count > 10000) *(uint32_t *) NULL = 0; } _core_if->op_state = A_HOST; /* * Initialize the Core for Host mode. */ dwc_otg_core_init(_core_if); dwc_otg_enable_global_interrupts(_core_if); hcd_start(_core_if); } /* Set flag and clear interrupt */ gintsts.b.conidstschng = 1; dwc_write_reg32(&_core_if->core_global_regs->gintsts, gintsts.d32); return 1; } /** * This interrupt indicates that a device is initiating the Session * Request Protocol to request the host to turn on bus power so a new * session can begin. The handler responds by turning on bus power. If * the DWC_otg controller is in low power mode, the handler brings the * controller out of low power mode before turning on bus power. * * @param _core_if Programming view of DWC_otg controller. */ int32_t dwc_otg_handle_session_req_intr(dwc_otg_core_if_t * _core_if) { gintsts_data_t gintsts; #ifndef DWC_HOST_ONLY hprt0_data_t hprt0; DWC_DEBUGPL(DBG_ANY, "++Session Request Interrupt++\n"); if (dwc_otg_is_device_mode(_core_if)) { DWC_PRINT("SRP: Device mode\n"); } else { DWC_PRINT("SRP: Host mode\n"); /* Turn on the port power bit. */ hprt0.d32 = dwc_otg_read_hprt0(_core_if); hprt0.b.prtpwr = 1; dwc_write_reg32(_core_if->host_if->hprt0, hprt0.d32); /* Start the Connection timer. So a message can be displayed * if connect does not occur within 10 seconds. */ hcd_session_start(_core_if); } #endif /* */ /* Clear interrupt */ gintsts.d32 = 0; gintsts.b.sessreqintr = 1; dwc_write_reg32(&_core_if->core_global_regs->gintsts, gintsts.d32); return 1; } /** * This interrupt indicates that the DWC_otg controller has detected a * resume or remote wakeup sequence. If the DWC_otg controller is in * low power mode, the handler must brings the controller out of low * power mode. The controller automatically begins resume * signaling. The handler schedules a time to stop resume signaling. */ int32_t dwc_otg_handle_wakeup_detected_intr(dwc_otg_core_if_t * _core_if) { gintsts_data_t gintsts; DWC_DEBUGPL(DBG_ANY,"++Resume and Remote Wakeup Detected Interrupt++\n"); if (dwc_otg_is_device_mode(_core_if)) { dctl_data_t dctl = {.d32 = 0}; DWC_DEBUGPL(DBG_PCD, "DSTS=0x%0x\n", dwc_read_reg32(&_core_if->dev_if->dev_global_regs->dsts)); #ifdef PARTIAL_POWER_DOWN if (_core_if->hwcfg4.b.power_optimiz) { pcgcctl_data_t power = {.d32 = 0}; power.d32 = dwc_read_reg32(_core_if->pcgcctl); DWC_DEBUGPL(DBG_CIL, "PCGCCTL=%0x\n", power.d32); power.b.stoppclk = 0; dwc_write_reg32(_core_if->pcgcctl, power.d32); power.b.pwrclmp = 0; dwc_write_reg32(_core_if->pcgcctl, power.d32); power.b.rstpdwnmodule = 0; dwc_write_reg32(_core_if->pcgcctl, power.d32); } #endif /* */ /* Clear the Remote Wakeup Signalling */ dctl.b.rmtwkupsig = 1; dwc_modify_reg32(&_core_if->dev_if->dev_global_regs->dctl, dctl.d32, 0); if (_core_if->pcd_cb && _core_if->pcd_cb->resume_wakeup) { _core_if->pcd_cb->resume_wakeup(_core_if->pcd_cb->p); } } else { /* * Clear the Resume after 70ms. (Need 20 ms minimum. Use 70 ms * so that OPT tests pass with all PHYs). */ hprt0_data_t hprt0 = {.d32 = 0}; pcgcctl_data_t pcgcctl = {.d32 = 0}; /* Restart the Phy Clock */ pcgcctl.b.stoppclk = 1; dwc_modify_reg32(_core_if->pcgcctl, pcgcctl.d32, 0); UDELAY(10); /* Now wait for 70 ms. */ hprt0.d32 = dwc_otg_read_hprt0(_core_if); DWC_DEBUGPL(DBG_ANY, "Resume: HPRT0=%0x\n", hprt0.d32); MDELAY(70); hprt0.b.prtres = 0; /* Resume */ dwc_write_reg32(_core_if->host_if->hprt0, hprt0.d32); DWC_DEBUGPL(DBG_ANY, "Clear Resume: HPRT0=%0x\n", dwc_read_reg32(_core_if->host_if->hprt0)); } /* Clear interrupt */ gintsts.d32 = 0; gintsts.b.wkupintr = 1; dwc_write_reg32(&_core_if->core_global_regs->gintsts, gintsts.d32); return 1; } /** * This interrupt indicates that a device has been disconnected from * the root port. */ int32_t dwc_otg_handle_disconnect_intr(dwc_otg_core_if_t * _core_if) { gintsts_data_t gintsts; printk(KERN_ERR " Disconnect Detected Interrupt++ (%s) %s\n", (dwc_otg_is_host_mode(_core_if) ? "Host" : "Device"), op_state_str(_core_if)); DWC_DEBUGPL(DBG_ANY, "++Disconnect Detected Interrupt++ (%s) %s\n", (dwc_otg_is_host_mode(_core_if) ? "Host" : "Device"), op_state_str(_core_if)); /** @todo Consolidate this if statement. */ #ifndef DWC_HOST_ONLY if (_core_if->op_state == B_HOST) { /* If in device mode Disconnect and stop the HCD, then * start the PCD. */ hcd_disconnect(_core_if); pcd_start(_core_if); _core_if->op_state = B_PERIPHERAL; } else if (dwc_otg_is_device_mode(_core_if)) { gotgctl_data_t gotgctl = {.d32 = 0}; gotgctl.d32 = dwc_read_reg32(&_core_if->core_global_regs->gotgctl); if (gotgctl.b.hstsethnpen == 1) { /* Do nothing, if HNP in process the OTG * interrupt "Host Negotiation Detected" * interrupt will do the mode switch. */ } else if (gotgctl.b.devhnpen == 0) { /* If in device mode Disconnect and stop the HCD, then * start the PCD. */ hcd_disconnect(_core_if); pcd_start(_core_if); _core_if->op_state = B_PERIPHERAL; } else { DWC_DEBUGPL(DBG_ANY, "!a_peripheral && !devhnpen\n"); } } else { if (_core_if->op_state == A_HOST) { /* A-Cable still connected but device disconnected. */ hcd_disconnect(_core_if); } } #endif /* */ gintsts.d32 = 0; gintsts.b.disconnect = 1; dwc_write_reg32(&_core_if->core_global_regs->gintsts, gintsts.d32); return 1; } /** * This interrupt indicates that SUSPEND state has been detected on * the USB. * * For HNP the USB Suspend interrupt signals the change from * "a_peripheral" to "a_host". * * When power management is enabled the core will be put in low power * mode. */ int32_t dwc_otg_handle_usb_suspend_intr(dwc_otg_core_if_t * _core_if) { dsts_data_t dsts; gintsts_data_t gintsts; DWC_DEBUGPL(DBG_ANY, "USB SUSPEND\n"); if (dwc_otg_is_device_mode(_core_if)) { /* Check the Device status register to determine if the Suspend * state is active. */ dsts.d32 = dwc_read_reg32(&_core_if->dev_if->dev_global_regs->dsts); DWC_DEBUGPL(DBG_PCD, "DSTS=0x%0x\n", dsts.d32); DWC_DEBUGPL(DBG_PCD, "DSTS.Suspend Status=%d " "HWCFG4.power Optimize=%d\n", dsts.b.suspsts, _core_if->hwcfg4.b.power_optimiz); #ifdef PARTIAL_POWER_DOWN /** @todo Add a module parameter for power management. */ if (dsts.b.suspsts && _core_if->hwcfg4.b.power_optimiz) { pcgcctl_data_t power = {.d32 = 0}; DWC_DEBUGPL(DBG_CIL, "suspend\n"); power.b.pwrclmp = 1; dwc_write_reg32(_core_if->pcgcctl, power.d32); power.b.rstpdwnmodule = 1; dwc_modify_reg32(_core_if->pcgcctl, 0, power.d32); power.b.stoppclk = 1; dwc_modify_reg32(_core_if->pcgcctl, 0, power.d32); } else { DWC_DEBUGPL(DBG_ANY, "disconnect?\n"); } #endif /* */ /* PCD callback for suspend. */ pcd_suspend(_core_if); } else { if (_core_if->op_state == A_PERIPHERAL) {
/** * This function handles the OTG Interrupts. It reads the OTG * Interrupt Register (GOTGINT) to determine what interrupt has * occurred. * * @param _core_if Programming view of DWC_otg controller. */ int32_t dwc_otg_handle_otg_intr(dwc_otg_core_if_t * _core_if) { dwc_otg_core_global_regs_t * global_regs = _core_if->core_global_regs; gotgint_data_t gotgint; gotgctl_data_t gotgctl; gintmsk_data_t gintmsk; gotgint.d32 = dwc_read_reg32(&global_regs->gotgint); gotgctl.d32 = dwc_read_reg32(&global_regs->gotgctl); DWC_DEBUGPL(DBG_CIL, "++OTG Interrupt gotgint=%0x [%s]\n", gotgint.d32, op_state_str(_core_if)); //DWC_DEBUGPL(DBG_CIL, "gotgctl=%08x\n", gotgctl.d32 ); if (gotgint.b.sesenddet) { DWC_DEBUGPL(DBG_ANY, " ++OTG Interrupt: " "Session End Detected++ (%s)\n", op_state_str(_core_if)); gotgctl.d32 = dwc_read_reg32(&global_regs->gotgctl); if (_core_if->op_state == B_HOST) { pcd_start(_core_if); _core_if->op_state = B_PERIPHERAL; } else { /* If not B_HOST and Device HNP still set. HNP * Did not succeed!*/ if (gotgctl.b.devhnpen) { DWC_DEBUGPL(DBG_ANY, "Session End Detected\n"); DWC_ERROR("Device Not Connected/Responding!\n"); } /* If Session End Detected the B-Cable has * been disconnected. */ /* Reset PCD and Gadget driver to a * clean state. */ pcd_stop(_core_if); } gotgctl.d32 = 0; gotgctl.b.devhnpen = 1; dwc_modify_reg32(&global_regs->gotgctl, gotgctl.d32, 0); } if (gotgint.b.sesreqsucstschng) { DWC_DEBUGPL(DBG_ANY, " ++OTG Interrupt: " "Session Reqeust Success Status Change++\n"); gotgctl.d32 = dwc_read_reg32(&global_regs->gotgctl); if (gotgctl.b.sesreqscs) { if ((_core_if->core_params->phy_type == DWC_PHY_TYPE_PARAM_FS) && (_core_if->core_params->i2c_enable)) { _core_if->srp_success = 1; } else { pcd_resume(_core_if); /* Clear Session Request */ gotgctl.d32 = 0; gotgctl.b.sesreq = 1; dwc_modify_reg32(&global_regs->gotgctl, gotgctl.d32, 0); } } } if (gotgint.b.hstnegsucstschng) { /* Print statements during the HNP interrupt handling * can cause it to fail.*/ gotgctl.d32 = dwc_read_reg32(&global_regs->gotgctl); if (gotgctl.b.hstnegscs) { if (dwc_otg_is_host_mode(_core_if)) { _core_if->op_state = B_HOST; /* * Need to disable SOF interrupt immediately. * When switching from device to host, the PCD * interrupt handler won't handle the * interrupt if host mode is already set. The * HCD interrupt handler won't get called if * the HCD state is HALT. This means that the * interrupt does not get handled and Linux * complains loudly. */ gintmsk.d32 = 0; gintmsk.b.sofintr = 1; dwc_modify_reg32(&global_regs->gintmsk, gintmsk.d32, 0); pcd_stop(_core_if); /* * Initialize the Core for Host mode. */ hcd_start(_core_if); _core_if->op_state = B_HOST; } } else { gotgctl.d32 = 0; gotgctl.b.hnpreq = 1; gotgctl.b.devhnpen = 1; dwc_modify_reg32(&global_regs->gotgctl, gotgctl.d32, 0); DWC_DEBUGPL(DBG_ANY, "HNP Failed\n"); DWC_ERROR("Device Not Connected/Responding\n"); } } if (gotgint.b.hstnegdet) { /* The disconnect interrupt is set at the same time as * Host Negotiation Detected. During the mode * switch all interrupts are cleared so the disconnect * interrupt handler will not get executed. */ DWC_DEBUGPL(DBG_ANY, " ++OTG Interrupt: " "Host Negotiation Detected++ (%s)\n", (dwc_otg_is_host_mode(_core_if) ? "Host" : "Device")); if (dwc_otg_is_device_mode(_core_if)) { DWC_DEBUGPL(DBG_ANY, "a_suspend->a_peripheral (%d)\n", _core_if->op_state); hcd_disconnect(_core_if); pcd_start(_core_if); _core_if->op_state = A_PERIPHERAL; } else { /* * Need to disable SOF interrupt immediately. When * switching from device to host, the PCD interrupt * handler won't handle the interrupt if host mode is * already set. The HCD interrupt handler won't get * called if the HCD state is HALT. This means that * the interrupt does not get handled and Linux * complains loudly. */ gintmsk.d32 = 0; gintmsk.b.sofintr = 1; dwc_modify_reg32(&global_regs->gintmsk, gintmsk.d32, 0); pcd_stop(_core_if); hcd_start(_core_if); _core_if->op_state = A_HOST; } } if (gotgint.b.adevtoutchng) { DWC_DEBUGPL(DBG_ANY, " ++OTG Interrupt: " "A-Device Timeout Change++\n"); } if (gotgint.b.debdone) { DWC_DEBUGPL(DBG_ANY, " ++OTG Interrupt: " "Debounce Done++\n"); } /* Clear GOTGINT */ dwc_write_reg32(&_core_if->core_global_regs->gotgint, gotgint.d32); return 1; }