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1// SPDX-License-Identifier: GPL-2.02/*3 * Qualcomm Peripheral Image Loader for Q6V54 *5 * Copyright (C) 2016-2018 Linaro Ltd.6 * Copyright (C) 2014 Sony Mobile Communications AB7 * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.8 */9#include <linux/kernel.h>10#include <linux/platform_device.h>11#include <linux/interconnect.h>12#include <linux/interrupt.h>13#include <linux/module.h>14#include <linux/soc/qcom/qcom_aoss.h>15#include <linux/soc/qcom/smem.h>16#include <linux/soc/qcom/smem_state.h>17#include <linux/remoteproc.h>18#include "qcom_common.h"19#include "qcom_q6v5.h"20 21#define Q6V5_LOAD_STATE_MSG_LEN 6422#define Q6V5_PANIC_DELAY_MS 20023 24static int q6v5_load_state_toggle(struct qcom_q6v5 *q6v5, bool enable)25{26 int ret;27 28 if (!q6v5->qmp)29 return 0;30 31 ret = qmp_send(q6v5->qmp, "{class: image, res: load_state, name: %s, val: %s}",32 q6v5->load_state, enable ? "on" : "off");33 if (ret)34 dev_err(q6v5->dev, "failed to toggle load state\n");35 36 return ret;37}38 39/**40 * qcom_q6v5_prepare() - reinitialize the qcom_q6v5 context before start41 * @q6v5: reference to qcom_q6v5 context to be reinitialized42 *43 * Return: 0 on success, negative errno on failure44 */45int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5)46{47 int ret;48 49 ret = icc_set_bw(q6v5->path, 0, UINT_MAX);50 if (ret < 0) {51 dev_err(q6v5->dev, "failed to set bandwidth request\n");52 return ret;53 }54 55 ret = q6v5_load_state_toggle(q6v5, true);56 if (ret) {57 icc_set_bw(q6v5->path, 0, 0);58 return ret;59 }60 61 reinit_completion(&q6v5->start_done);62 reinit_completion(&q6v5->stop_done);63 64 q6v5->running = true;65 q6v5->handover_issued = false;66 67 enable_irq(q6v5->handover_irq);68 69 return 0;70}71EXPORT_SYMBOL_GPL(qcom_q6v5_prepare);72 73/**74 * qcom_q6v5_unprepare() - unprepare the qcom_q6v5 context after stop75 * @q6v5: reference to qcom_q6v5 context to be unprepared76 *77 * Return: 0 on success, 1 if handover hasn't yet been called78 */79int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5)80{81 disable_irq(q6v5->handover_irq);82 q6v5_load_state_toggle(q6v5, false);83 84 /* Disable interconnect vote, in case handover never happened */85 icc_set_bw(q6v5->path, 0, 0);86 87 return !q6v5->handover_issued;88}89EXPORT_SYMBOL_GPL(qcom_q6v5_unprepare);90 91static irqreturn_t q6v5_wdog_interrupt(int irq, void *data)92{93 struct qcom_q6v5 *q6v5 = data;94 size_t len;95 char *msg;96 97 /* Sometimes the stop triggers a watchdog rather than a stop-ack */98 if (!q6v5->running) {99 complete(&q6v5->stop_done);100 return IRQ_HANDLED;101 }102 103 msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len);104 if (!IS_ERR(msg) && len > 0 && msg[0])105 dev_err(q6v5->dev, "watchdog received: %s\n", msg);106 else107 dev_err(q6v5->dev, "watchdog without message\n");108 109 q6v5->running = false;110 rproc_report_crash(q6v5->rproc, RPROC_WATCHDOG);111 112 return IRQ_HANDLED;113}114 115static irqreturn_t q6v5_fatal_interrupt(int irq, void *data)116{117 struct qcom_q6v5 *q6v5 = data;118 size_t len;119 char *msg;120 121 if (!q6v5->running)122 return IRQ_HANDLED;123 124 msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len);125 if (!IS_ERR(msg) && len > 0 && msg[0])126 dev_err(q6v5->dev, "fatal error received: %s\n", msg);127 else128 dev_err(q6v5->dev, "fatal error without message\n");129 130 q6v5->running = false;131 rproc_report_crash(q6v5->rproc, RPROC_FATAL_ERROR);132 133 return IRQ_HANDLED;134}135 136static irqreturn_t q6v5_ready_interrupt(int irq, void *data)137{138 struct qcom_q6v5 *q6v5 = data;139 140 complete(&q6v5->start_done);141 142 return IRQ_HANDLED;143}144 145/**146 * qcom_q6v5_wait_for_start() - wait for remote processor start signal147 * @q6v5: reference to qcom_q6v5 context148 * @timeout: timeout to wait for the event, in jiffies149 *150 * qcom_q6v5_unprepare() should not be called when this function fails.151 *152 * Return: 0 on success, -ETIMEDOUT on timeout153 */154int qcom_q6v5_wait_for_start(struct qcom_q6v5 *q6v5, int timeout)155{156 int ret;157 158 ret = wait_for_completion_timeout(&q6v5->start_done, timeout);159 if (!ret)160 disable_irq(q6v5->handover_irq);161 162 return !ret ? -ETIMEDOUT : 0;163}164EXPORT_SYMBOL_GPL(qcom_q6v5_wait_for_start);165 166static irqreturn_t q6v5_handover_interrupt(int irq, void *data)167{168 struct qcom_q6v5 *q6v5 = data;169 170 if (q6v5->handover)171 q6v5->handover(q6v5);172 173 icc_set_bw(q6v5->path, 0, 0);174 175 q6v5->handover_issued = true;176 177 return IRQ_HANDLED;178}179 180static irqreturn_t q6v5_stop_interrupt(int irq, void *data)181{182 struct qcom_q6v5 *q6v5 = data;183 184 complete(&q6v5->stop_done);185 186 return IRQ_HANDLED;187}188 189/**190 * qcom_q6v5_request_stop() - request the remote processor to stop191 * @q6v5: reference to qcom_q6v5 context192 * @sysmon: reference to the remote's sysmon instance, or NULL193 *194 * Return: 0 on success, negative errno on failure195 */196int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5, struct qcom_sysmon *sysmon)197{198 int ret;199 200 q6v5->running = false;201 202 /* Don't perform SMP2P dance if remote isn't running */203 if (q6v5->rproc->state != RPROC_RUNNING || qcom_sysmon_shutdown_acked(sysmon))204 return 0;205 206 qcom_smem_state_update_bits(q6v5->state,207 BIT(q6v5->stop_bit), BIT(q6v5->stop_bit));208 209 ret = wait_for_completion_timeout(&q6v5->stop_done, 5 * HZ);210 211 qcom_smem_state_update_bits(q6v5->state, BIT(q6v5->stop_bit), 0);212 213 return ret == 0 ? -ETIMEDOUT : 0;214}215EXPORT_SYMBOL_GPL(qcom_q6v5_request_stop);216 217/**218 * qcom_q6v5_panic() - panic handler to invoke a stop on the remote219 * @q6v5: reference to qcom_q6v5 context220 *221 * Set the stop bit and sleep in order to allow the remote processor to flush222 * its caches etc for post mortem debugging.223 *224 * Return: 200ms225 */226unsigned long qcom_q6v5_panic(struct qcom_q6v5 *q6v5)227{228 qcom_smem_state_update_bits(q6v5->state,229 BIT(q6v5->stop_bit), BIT(q6v5->stop_bit));230 231 return Q6V5_PANIC_DELAY_MS;232}233EXPORT_SYMBOL_GPL(qcom_q6v5_panic);234 235/**236 * qcom_q6v5_init() - initializer of the q6v5 common struct237 * @q6v5: handle to be initialized238 * @pdev: platform_device reference for acquiring resources239 * @rproc: associated remoteproc instance240 * @crash_reason: SMEM id for crash reason string, or 0 if none241 * @load_state: load state resource string242 * @handover: function to be called when proxy resources should be released243 *244 * Return: 0 on success, negative errno on failure245 */246int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,247 struct rproc *rproc, int crash_reason, const char *load_state,248 void (*handover)(struct qcom_q6v5 *q6v5))249{250 int ret;251 252 q6v5->rproc = rproc;253 q6v5->dev = &pdev->dev;254 q6v5->crash_reason = crash_reason;255 q6v5->handover = handover;256 257 init_completion(&q6v5->start_done);258 init_completion(&q6v5->stop_done);259 260 q6v5->wdog_irq = platform_get_irq_byname(pdev, "wdog");261 if (q6v5->wdog_irq < 0)262 return q6v5->wdog_irq;263 264 ret = devm_request_threaded_irq(&pdev->dev, q6v5->wdog_irq,265 NULL, q6v5_wdog_interrupt,266 IRQF_TRIGGER_RISING | IRQF_ONESHOT,267 "q6v5 wdog", q6v5);268 if (ret) {269 dev_err(&pdev->dev, "failed to acquire wdog IRQ\n");270 return ret;271 }272 273 q6v5->fatal_irq = platform_get_irq_byname(pdev, "fatal");274 if (q6v5->fatal_irq < 0)275 return q6v5->fatal_irq;276 277 ret = devm_request_threaded_irq(&pdev->dev, q6v5->fatal_irq,278 NULL, q6v5_fatal_interrupt,279 IRQF_TRIGGER_RISING | IRQF_ONESHOT,280 "q6v5 fatal", q6v5);281 if (ret) {282 dev_err(&pdev->dev, "failed to acquire fatal IRQ\n");283 return ret;284 }285 286 q6v5->ready_irq = platform_get_irq_byname(pdev, "ready");287 if (q6v5->ready_irq < 0)288 return q6v5->ready_irq;289 290 ret = devm_request_threaded_irq(&pdev->dev, q6v5->ready_irq,291 NULL, q6v5_ready_interrupt,292 IRQF_TRIGGER_RISING | IRQF_ONESHOT,293 "q6v5 ready", q6v5);294 if (ret) {295 dev_err(&pdev->dev, "failed to acquire ready IRQ\n");296 return ret;297 }298 299 q6v5->handover_irq = platform_get_irq_byname(pdev, "handover");300 if (q6v5->handover_irq < 0)301 return q6v5->handover_irq;302 303 ret = devm_request_threaded_irq(&pdev->dev, q6v5->handover_irq,304 NULL, q6v5_handover_interrupt,305 IRQF_TRIGGER_RISING | IRQF_ONESHOT,306 "q6v5 handover", q6v5);307 if (ret) {308 dev_err(&pdev->dev, "failed to acquire handover IRQ\n");309 return ret;310 }311 disable_irq(q6v5->handover_irq);312 313 q6v5->stop_irq = platform_get_irq_byname(pdev, "stop-ack");314 if (q6v5->stop_irq < 0)315 return q6v5->stop_irq;316 317 ret = devm_request_threaded_irq(&pdev->dev, q6v5->stop_irq,318 NULL, q6v5_stop_interrupt,319 IRQF_TRIGGER_RISING | IRQF_ONESHOT,320 "q6v5 stop", q6v5);321 if (ret) {322 dev_err(&pdev->dev, "failed to acquire stop-ack IRQ\n");323 return ret;324 }325 326 q6v5->state = devm_qcom_smem_state_get(&pdev->dev, "stop", &q6v5->stop_bit);327 if (IS_ERR(q6v5->state)) {328 dev_err(&pdev->dev, "failed to acquire stop state\n");329 return PTR_ERR(q6v5->state);330 }331 332 q6v5->load_state = devm_kstrdup_const(&pdev->dev, load_state, GFP_KERNEL);333 q6v5->qmp = qmp_get(&pdev->dev);334 if (IS_ERR(q6v5->qmp)) {335 if (PTR_ERR(q6v5->qmp) != -ENODEV)336 return dev_err_probe(&pdev->dev, PTR_ERR(q6v5->qmp),337 "failed to acquire load state\n");338 q6v5->qmp = NULL;339 } else if (!q6v5->load_state) {340 if (!load_state)341 dev_err(&pdev->dev, "load state resource string empty\n");342 343 qmp_put(q6v5->qmp);344 return load_state ? -ENOMEM : -EINVAL;345 }346 347 q6v5->path = devm_of_icc_get(&pdev->dev, NULL);348 if (IS_ERR(q6v5->path))349 return dev_err_probe(&pdev->dev, PTR_ERR(q6v5->path),350 "failed to acquire interconnect path\n");351 352 return 0;353}354EXPORT_SYMBOL_GPL(qcom_q6v5_init);355 356/**357 * qcom_q6v5_deinit() - deinitialize the q6v5 common struct358 * @q6v5: reference to qcom_q6v5 context to be deinitialized359 */360void qcom_q6v5_deinit(struct qcom_q6v5 *q6v5)361{362 qmp_put(q6v5->qmp);363}364EXPORT_SYMBOL_GPL(qcom_q6v5_deinit);365 366MODULE_LICENSE("GPL v2");367MODULE_DESCRIPTION("Qualcomm Peripheral Image Loader for Q6V5");368