| /* |
| * Copyright (c) 2015-2016 The Linux Foundation. All rights reserved. |
| * |
| * Previously licensed under the ISC license by Qualcomm Atheros, Inc. |
| * |
| * |
| * Permission to use, copy, modify, and/or distribute this software for |
| * any purpose with or without fee is hereby granted, provided that the |
| * above copyright notice and this permission notice appear in all |
| * copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| * PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| /* |
| * This file was originally distributed by Qualcomm Atheros, Inc. |
| * under proprietary terms before Copyright ownership was assigned |
| * to the Linux Foundation. |
| */ |
| |
| /** |
| * DOC: if_snoc.c |
| * |
| * c file for snoc specif implementations. |
| */ |
| |
| #include "hif.h" |
| #include "hif_main.h" |
| #include "hif_debug.h" |
| #include "hif_io32.h" |
| #include "ce_main.h" |
| #include "ce_tasklet.h" |
| #include "snoc_api.h" |
| #include <soc/qcom/icnss.h> |
| #include "pld_common.h" |
| #include "qdf_util.h" |
| |
| /** |
| * hif_disable_isr(): disable isr |
| * |
| * This function disables isr and kills tasklets |
| * |
| * @hif_ctx: struct hif_softc |
| * |
| * Return: void |
| */ |
| void hif_snoc_disable_isr(struct hif_softc *scn) |
| { |
| hif_nointrs(scn); |
| ce_tasklet_kill(scn); |
| qdf_atomic_set(&scn->active_tasklet_cnt, 0); |
| } |
| |
| /** |
| * hif_dump_registers(): dump bus debug registers |
| * @scn: struct hif_opaque_softc |
| * |
| * This function dumps hif bus debug registers |
| * |
| * Return: 0 for success or error code |
| */ |
| int hif_snoc_dump_registers(struct hif_softc *hif_ctx) |
| { |
| int status; |
| struct hif_softc *scn = HIF_GET_SOFTC(hif_ctx); |
| |
| status = hif_dump_ce_registers(scn); |
| if (status) |
| HIF_ERROR("%s: Dump CE Registers Failed", __func__); |
| |
| return 0; |
| } |
| |
| void hif_snoc_display_stats(struct hif_softc *hif_ctx) |
| { |
| struct HIF_CE_state *hif_state = HIF_GET_CE_STATE(hif_ctx); |
| |
| if (hif_state == NULL) { |
| HIF_ERROR("%s, hif_ctx null", __func__); |
| return; |
| } |
| hif_display_ce_stats(hif_state); |
| } |
| |
| void hif_snoc_clear_stats(struct hif_softc *hif_ctx) |
| { |
| struct HIF_CE_state *hif_state = HIF_GET_CE_STATE(hif_ctx); |
| |
| if (hif_state == NULL) { |
| HIF_ERROR("%s, hif_ctx null", __func__); |
| return; |
| } |
| hif_clear_ce_stats(hif_state); |
| } |
| |
| /** |
| * hif_snoc_close(): hif_bus_close |
| * |
| * Return: n/a |
| */ |
| void hif_snoc_close(struct hif_softc *scn) |
| { |
| hif_ce_close(scn); |
| } |
| |
| /** |
| * hif_bus_open(): hif_bus_open |
| * @hif_ctx: hif context |
| * @bus_type: bus type |
| * |
| * Return: n/a |
| */ |
| QDF_STATUS hif_snoc_open(struct hif_softc *hif_ctx, enum qdf_bus_type bus_type) |
| { |
| return hif_ce_open(hif_ctx); |
| } |
| |
| /** |
| * hif_snoc_get_soc_info() - populates scn with hw info |
| * |
| * fills in the virtual and physical base address as well as |
| * soc version info. |
| * |
| * return 0 or QDF_STATUS_E_FAILURE |
| */ |
| static QDF_STATUS hif_snoc_get_soc_info(struct hif_softc *scn) |
| { |
| int ret; |
| struct pld_soc_info soc_info; |
| |
| qdf_mem_zero(&soc_info, sizeof(soc_info)); |
| |
| ret = pld_get_soc_info(scn->qdf_dev->dev, &soc_info); |
| if (ret < 0) { |
| HIF_ERROR("%s: pld_get_soc_info error = %d", __func__, ret); |
| return QDF_STATUS_E_FAILURE; |
| } |
| |
| scn->mem = soc_info.v_addr; |
| scn->mem_pa = soc_info.p_addr; |
| |
| scn->target_info.soc_version = soc_info.soc_id; |
| scn->target_info.target_version = soc_info.soc_id; |
| scn->target_info.target_revision = 0; |
| return QDF_STATUS_SUCCESS; |
| } |
| |
| /** |
| * hif_bus_configure() - configure the snoc bus |
| * @scn: pointer to the hif context. |
| * |
| * return: 0 for success. nonzero for failure. |
| */ |
| int hif_snoc_bus_configure(struct hif_softc *scn) |
| { |
| int ret; |
| |
| ret = hif_snoc_get_soc_info(scn); |
| if (ret) |
| return ret; |
| |
| hif_ce_prepare_config(scn); |
| |
| ret = hif_wlan_enable(scn); |
| if (ret) { |
| HIF_ERROR("%s: hif_wlan_enable error = %d", |
| __func__, ret); |
| return ret; |
| } |
| |
| ret = hif_config_ce(scn); |
| if (ret) |
| hif_wlan_disable(scn); |
| return ret; |
| } |
| |
| /** |
| * hif_snoc_get_target_type(): Get the target type |
| * |
| * This function is used to query the target type. |
| * |
| * @ol_sc: hif_softc struct pointer |
| * @dev: device pointer |
| * @bdev: bus dev pointer |
| * @bid: bus id pointer |
| * @hif_type: HIF type such as HIF_TYPE_QCA6180 |
| * @target_type: target type such as TARGET_TYPE_QCA6180 |
| * |
| * Return: 0 for success |
| */ |
| static inline int hif_snoc_get_target_type(struct hif_softc *ol_sc, |
| struct device *dev, void *bdev, const hif_bus_id *bid, |
| uint32_t *hif_type, uint32_t *target_type) |
| { |
| /* TODO: need to use HW version. Hard code for now */ |
| #ifdef QCA_WIFI_3_0_ADRASTEA |
| *hif_type = HIF_TYPE_ADRASTEA; |
| *target_type = TARGET_TYPE_ADRASTEA; |
| #else |
| *hif_type = 0; |
| *target_type = 0; |
| #endif |
| return 0; |
| } |
| |
| /** |
| * hif_enable_bus(): hif_enable_bus |
| * @dev: dev |
| * @bdev: bus dev |
| * @bid: bus id |
| * @type: bus type |
| * |
| * Return: QDF_STATUS |
| */ |
| QDF_STATUS hif_snoc_enable_bus(struct hif_softc *ol_sc, |
| struct device *dev, void *bdev, |
| const hif_bus_id *bid, |
| enum hif_enable_type type) |
| { |
| int ret; |
| int hif_type; |
| int target_type; |
| #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 9, 0) |
| ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(37)); |
| #else |
| ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(37)); |
| #endif |
| if (ret) { |
| HIF_ERROR("%s: failed to set dma mask error = %d", |
| __func__, ret); |
| return ret; |
| } |
| |
| ret = qdf_device_init_wakeup(ol_sc->qdf_dev, true); |
| if (ret == -EEXIST) |
| HIF_WARN("%s: device_init_wakeup already done", |
| __func__); |
| else if (ret) { |
| HIF_ERROR("%s: device_init_wakeup: err= %d", |
| __func__, ret); |
| return ret; |
| } |
| |
| if (!ol_sc) { |
| HIF_ERROR("%s: hif_ctx is NULL", __func__); |
| return QDF_STATUS_E_NOMEM; |
| } |
| |
| ret = hif_snoc_get_target_type(ol_sc, dev, bdev, bid, |
| &hif_type, &target_type); |
| if (ret < 0) { |
| HIF_ERROR("%s: invalid device id/revision_id", __func__); |
| return QDF_STATUS_E_FAILURE; |
| } |
| |
| ol_sc->target_info.target_type = target_type; |
| |
| hif_register_tbl_attach(ol_sc, hif_type); |
| hif_target_register_tbl_attach(ol_sc, target_type); |
| |
| HIF_TRACE("%s: X - hif_type = 0x%x, target_type = 0x%x", |
| __func__, hif_type, target_type); |
| |
| return QDF_STATUS_SUCCESS; |
| } |
| |
| /** |
| * hif_disable_bus(): hif_disable_bus |
| * |
| * This function disables the bus |
| * |
| * @bdev: bus dev |
| * |
| * Return: none |
| */ |
| void hif_snoc_disable_bus(struct hif_softc *scn) |
| { |
| int ret = qdf_device_init_wakeup(scn->qdf_dev, false); |
| |
| if (ret) |
| HIF_ERROR("%s: device_init_wakeup: err %d", __func__, ret); |
| } |
| |
| /** |
| * hif_nointrs(): disable IRQ |
| * |
| * This function stops interrupt(s) |
| * |
| * @scn: struct hif_softc |
| * |
| * Return: none |
| */ |
| void hif_snoc_nointrs(struct hif_softc *scn) |
| { |
| struct HIF_CE_state *hif_state = HIF_GET_CE_STATE(scn); |
| if (scn->request_irq_done) { |
| ce_unregister_irq(hif_state, 0xfff); |
| scn->request_irq_done = false; |
| } |
| } |
| |
| /** |
| * ce_irq_enable() - enable copy engine IRQ |
| * @scn: struct hif_softc |
| * @ce_id: ce_id |
| * |
| * Return: N/A |
| */ |
| void hif_snoc_irq_enable(struct hif_softc *scn, |
| int ce_id) |
| { |
| ce_enable_irq_in_individual_register(scn, ce_id); |
| } |
| |
| /** |
| * ce_irq_disable() - disable copy engine IRQ |
| * @scn: struct hif_softc |
| * @ce_id: ce_id |
| * |
| * Return: N/A |
| */ |
| void hif_snoc_irq_disable(struct hif_softc *scn, int ce_id) |
| { |
| ce_disable_irq_in_individual_register(scn, ce_id); |
| } |
| |
| /* |
| * hif_snoc_setup_wakeup_sources() - enable/disable irq wake on correct irqs |
| * @hif_softc: hif context |
| * |
| * Firmware will send a wakeup request to the HTC_CTRL_RSVD_SVC when waking up |
| * the host driver. Ensure that the copy complete interrupt from this copy |
| * engine can wake up the apps processor. |
| * |
| * Return: 0 for success |
| */ |
| QDF_STATUS hif_snoc_setup_wakeup_sources(struct hif_softc *scn, bool enable) |
| { |
| struct hif_opaque_softc *hif_hdl = GET_HIF_OPAQUE_HDL(scn); |
| uint8_t ul_pipe, dl_pipe; |
| int ul_is_polled, dl_is_polled; |
| int irq_to_wake_on; |
| |
| QDF_STATUS status; |
| int ret; |
| |
| status = hif_map_service_to_pipe(hif_hdl, HTC_CTRL_RSVD_SVC, |
| &ul_pipe, &dl_pipe, |
| &ul_is_polled, &dl_is_polled); |
| if (status) { |
| HIF_ERROR("%s: pipe_mapping failure", __func__); |
| return status; |
| } |
| |
| irq_to_wake_on = icnss_get_irq(dl_pipe); |
| if (irq_to_wake_on < 0) { |
| HIF_ERROR("%s: failed to map ce to irq", __func__); |
| return QDF_STATUS_E_RESOURCES; |
| } |
| |
| if (enable) |
| ret = enable_irq_wake(irq_to_wake_on); |
| else |
| ret = disable_irq_wake(irq_to_wake_on); |
| |
| if (ret) { |
| HIF_ERROR("%s: Fail to setup wake IRQ!", __func__); |
| return QDF_STATUS_E_RESOURCES; |
| } |
| |
| HIF_INFO("%s: expecting wake from ce %d, irq %d enable %d", |
| __func__, dl_pipe, irq_to_wake_on, enable); |
| return QDF_STATUS_SUCCESS; |
| } |
| |
| /** |
| * __hif_snoc_irq_state_vote() - enable/disable all the ce interrupts |
| * @scn: hif context pointer |
| * @enble: true to enable the interrupts false to disable |
| * |
| * takes care of unwinding partial successes. |
| * |
| * Return: QDF_STATUS_SUCCESS on success |
| */ |
| |
| static QDF_STATUS __hif_snoc_irq_state_vote(struct hif_softc *scn, bool enable) |
| { |
| int num_ce = scn->ce_count; |
| int ce_id = 0; |
| int irq; |
| |
| while (ce_id < num_ce) { |
| irq = icnss_get_irq(ce_id); |
| if (irq < 0) |
| goto error; |
| |
| if (enable) |
| enable_irq(irq); |
| else |
| disable_irq(irq); |
| |
| ce_id++; |
| } |
| |
| return QDF_STATUS_SUCCESS; |
| |
| error: |
| HIF_ERROR("%s: failed to map ce to irq", __func__); |
| |
| while (--ce_id >= 0) { |
| irq = icnss_get_irq(ce_id); |
| if (irq < 0) |
| continue; |
| |
| if (enable) |
| disable_irq(irq); |
| else |
| enable_irq(irq); |
| } |
| return QDF_STATUS_E_FAULT; |
| } |
| |
| /** |
| * hif_snoc_enable_irqs() - enable the ce irqs |
| * @scn: hif context |
| * |
| * Return: QDF_STATUS_SUCCESS on success |
| */ |
| static QDF_STATUS hif_snoc_enable_irqs(struct hif_softc *scn) |
| { |
| return __hif_snoc_irq_state_vote(scn, true); |
| } |
| |
| /** |
| * hif_snoc_enable_irqs() - enable the ce irqs |
| * @scn: hif context |
| * |
| * Return: QDF_STATUS_SUCCESS on success |
| */ |
| static QDF_STATUS hif_snoc_disable_irqs(struct hif_softc *scn) |
| { |
| return __hif_snoc_irq_state_vote(scn, false); |
| } |
| |
| /** |
| * hif_snoc_bus_suspend() - prepare to suspend the bus |
| * @scn: hif context |
| * |
| * Setup wakeup interrupt configuration. |
| * Disable CE interrupts (wakeup interrupt will still wake apps) |
| * Drain tasklets. - make sure that we don't suspend while processing |
| * the wakeup message. |
| * |
| * Return: 0 on success. |
| */ |
| int hif_snoc_bus_suspend(struct hif_softc *scn) |
| { |
| if (hif_snoc_setup_wakeup_sources(scn, true) != QDF_STATUS_SUCCESS) |
| goto error; |
| |
| if (hif_snoc_disable_irqs(scn) != QDF_STATUS_SUCCESS) |
| goto wakeup_sources; |
| |
| if (hif_drain_tasklets(scn) != 0) |
| goto enable_irqs; |
| return 0; |
| |
| enable_irqs: |
| if (hif_snoc_enable_irqs(scn) != QDF_STATUS_SUCCESS) |
| QDF_BUG(0); |
| wakeup_sources: |
| if (hif_snoc_setup_wakeup_sources(scn, false) != QDF_STATUS_SUCCESS) |
| QDF_BUG(0); |
| error: |
| return -EFAULT; |
| |
| } |
| |
| /** |
| * hif_snoc_bus_resume() - snoc bus resume function |
| * @scn: hif context |
| * |
| * Clear wakeup interrupt configuration. |
| * Reenable ce interrupts |
| * |
| * Return: 0 on success |
| */ |
| int hif_snoc_bus_resume(struct hif_softc *scn) |
| { |
| if (hif_snoc_setup_wakeup_sources(scn, false) != QDF_STATUS_SUCCESS) |
| QDF_BUG(0); |
| |
| if (hif_snoc_enable_irqs(scn) != QDF_STATUS_SUCCESS) |
| QDF_BUG(0); |
| |
| return 0; |
| } |