Warning: That file was not part of the compilation database. It may have many parsing errors.

1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Qualcomm Peripheral Image Loader for Q6V5
4 *
5 * Copyright (C) 2016-2018 Linaro Ltd.
6 * Copyright (C) 2014 Sony Mobile Communications AB
7 * 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/interrupt.h>
12#include <linux/module.h>
13#include <linux/soc/qcom/smem.h>
14#include <linux/soc/qcom/smem_state.h>
15#include <linux/remoteproc.h>
16#include "qcom_q6v5.h"
17
18/**
19 * qcom_q6v5_prepare() - reinitialize the qcom_q6v5 context before start
20 * @q6v5: reference to qcom_q6v5 context to be reinitialized
21 *
22 * Return: 0 on success, negative errno on failure
23 */
24int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5)
25{
26 reinit_completion(&q6v5->start_done);
27 reinit_completion(&q6v5->stop_done);
28
29 q6v5->running = true;
30 q6v5->handover_issued = false;
31
32 enable_irq(q6v5->handover_irq);
33
34 return 0;
35}
36EXPORT_SYMBOL_GPL(qcom_q6v5_prepare);
37
38/**
39 * qcom_q6v5_unprepare() - unprepare the qcom_q6v5 context after stop
40 * @q6v5: reference to qcom_q6v5 context to be unprepared
41 *
42 * Return: 0 on success, 1 if handover hasn't yet been called
43 */
44int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5)
45{
46 disable_irq(q6v5->handover_irq);
47
48 return !q6v5->handover_issued;
49}
50EXPORT_SYMBOL_GPL(qcom_q6v5_unprepare);
51
52static irqreturn_t q6v5_wdog_interrupt(int irq, void *data)
53{
54 struct qcom_q6v5 *q6v5 = data;
55 size_t len;
56 char *msg;
57
58 /* Sometimes the stop triggers a watchdog rather than a stop-ack */
59 if (!q6v5->running) {
60 complete(&q6v5->stop_done);
61 return IRQ_HANDLED;
62 }
63
64 msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len);
65 if (!IS_ERR(msg) && len > 0 && msg[0])
66 dev_err(q6v5->dev, "watchdog received: %s\n", msg);
67 else
68 dev_err(q6v5->dev, "watchdog without message\n");
69
70 rproc_report_crash(q6v5->rproc, RPROC_WATCHDOG);
71
72 return IRQ_HANDLED;
73}
74
75static irqreturn_t q6v5_fatal_interrupt(int irq, void *data)
76{
77 struct qcom_q6v5 *q6v5 = data;
78 size_t len;
79 char *msg;
80
81 msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len);
82 if (!IS_ERR(msg) && len > 0 && msg[0])
83 dev_err(q6v5->dev, "fatal error received: %s\n", msg);
84 else
85 dev_err(q6v5->dev, "fatal error without message\n");
86
87 q6v5->running = false;
88 rproc_report_crash(q6v5->rproc, RPROC_FATAL_ERROR);
89
90 return IRQ_HANDLED;
91}
92
93static irqreturn_t q6v5_ready_interrupt(int irq, void *data)
94{
95 struct qcom_q6v5 *q6v5 = data;
96
97 complete(&q6v5->start_done);
98
99 return IRQ_HANDLED;
100}
101
102/**
103 * qcom_q6v5_wait_for_start() - wait for remote processor start signal
104 * @q6v5: reference to qcom_q6v5 context
105 * @timeout: timeout to wait for the event, in jiffies
106 *
107 * qcom_q6v5_unprepare() should not be called when this function fails.
108 *
109 * Return: 0 on success, -ETIMEDOUT on timeout
110 */
111int qcom_q6v5_wait_for_start(struct qcom_q6v5 *q6v5, int timeout)
112{
113 int ret;
114
115 ret = wait_for_completion_timeout(&q6v5->start_done, timeout);
116 if (!ret)
117 disable_irq(q6v5->handover_irq);
118
119 return !ret ? -ETIMEDOUT : 0;
120}
121EXPORT_SYMBOL_GPL(qcom_q6v5_wait_for_start);
122
123static irqreturn_t q6v5_handover_interrupt(int irq, void *data)
124{
125 struct qcom_q6v5 *q6v5 = data;
126
127 if (q6v5->handover)
128 q6v5->handover(q6v5);
129
130 q6v5->handover_issued = true;
131
132 return IRQ_HANDLED;
133}
134
135static irqreturn_t q6v5_stop_interrupt(int irq, void *data)
136{
137 struct qcom_q6v5 *q6v5 = data;
138
139 complete(&q6v5->stop_done);
140
141 return IRQ_HANDLED;
142}
143
144/**
145 * qcom_q6v5_request_stop() - request the remote processor to stop
146 * @q6v5: reference to qcom_q6v5 context
147 *
148 * Return: 0 on success, negative errno on failure
149 */
150int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5)
151{
152 int ret;
153
154 qcom_smem_state_update_bits(q6v5->state,
155 BIT(q6v5->stop_bit), BIT(q6v5->stop_bit));
156
157 ret = wait_for_completion_timeout(&q6v5->stop_done, 5 * HZ);
158
159 qcom_smem_state_update_bits(q6v5->state, BIT(q6v5->stop_bit), 0);
160
161 return ret == 0 ? -ETIMEDOUT : 0;
162}
163EXPORT_SYMBOL_GPL(qcom_q6v5_request_stop);
164
165/**
166 * qcom_q6v5_init() - initializer of the q6v5 common struct
167 * @q6v5: handle to be initialized
168 * @pdev: platform_device reference for acquiring resources
169 * @rproc: associated remoteproc instance
170 * @crash_reason: SMEM id for crash reason string, or 0 if none
171 * @handover: function to be called when proxy resources should be released
172 *
173 * Return: 0 on success, negative errno on failure
174 */
175int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
176 struct rproc *rproc, int crash_reason,
177 void (*handover)(struct qcom_q6v5 *q6v5))
178{
179 int ret;
180
181 q6v5->rproc = rproc;
182 q6v5->dev = &pdev->dev;
183 q6v5->crash_reason = crash_reason;
184 q6v5->handover = handover;
185
186 init_completion(&q6v5->start_done);
187 init_completion(&q6v5->stop_done);
188
189 q6v5->wdog_irq = platform_get_irq_byname(pdev, "wdog");
190 if (q6v5->wdog_irq < 0) {
191 if (q6v5->wdog_irq != -EPROBE_DEFER)
192 dev_err(&pdev->dev,
193 "failed to retrieve wdog IRQ: %d\n",
194 q6v5->wdog_irq);
195 return q6v5->wdog_irq;
196 }
197
198 ret = devm_request_threaded_irq(&pdev->dev, q6v5->wdog_irq,
199 NULL, q6v5_wdog_interrupt,
200 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
201 "q6v5 wdog", q6v5);
202 if (ret) {
203 dev_err(&pdev->dev, "failed to acquire wdog IRQ\n");
204 return ret;
205 }
206
207 q6v5->fatal_irq = platform_get_irq_byname(pdev, "fatal");
208 if (q6v5->fatal_irq < 0) {
209 if (q6v5->fatal_irq != -EPROBE_DEFER)
210 dev_err(&pdev->dev,
211 "failed to retrieve fatal IRQ: %d\n",
212 q6v5->fatal_irq);
213 return q6v5->fatal_irq;
214 }
215
216 ret = devm_request_threaded_irq(&pdev->dev, q6v5->fatal_irq,
217 NULL, q6v5_fatal_interrupt,
218 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
219 "q6v5 fatal", q6v5);
220 if (ret) {
221 dev_err(&pdev->dev, "failed to acquire fatal IRQ\n");
222 return ret;
223 }
224
225 q6v5->ready_irq = platform_get_irq_byname(pdev, "ready");
226 if (q6v5->ready_irq < 0) {
227 if (q6v5->ready_irq != -EPROBE_DEFER)
228 dev_err(&pdev->dev,
229 "failed to retrieve ready IRQ: %d\n",
230 q6v5->ready_irq);
231 return q6v5->ready_irq;
232 }
233
234 ret = devm_request_threaded_irq(&pdev->dev, q6v5->ready_irq,
235 NULL, q6v5_ready_interrupt,
236 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
237 "q6v5 ready", q6v5);
238 if (ret) {
239 dev_err(&pdev->dev, "failed to acquire ready IRQ\n");
240 return ret;
241 }
242
243 q6v5->handover_irq = platform_get_irq_byname(pdev, "handover");
244 if (q6v5->handover_irq < 0) {
245 if (q6v5->handover_irq != -EPROBE_DEFER)
246 dev_err(&pdev->dev,
247 "failed to retrieve handover IRQ: %d\n",
248 q6v5->handover_irq);
249 return q6v5->handover_irq;
250 }
251
252 ret = devm_request_threaded_irq(&pdev->dev, q6v5->handover_irq,
253 NULL, q6v5_handover_interrupt,
254 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
255 "q6v5 handover", q6v5);
256 if (ret) {
257 dev_err(&pdev->dev, "failed to acquire handover IRQ\n");
258 return ret;
259 }
260 disable_irq(q6v5->handover_irq);
261
262 q6v5->stop_irq = platform_get_irq_byname(pdev, "stop-ack");
263 if (q6v5->stop_irq < 0) {
264 if (q6v5->stop_irq != -EPROBE_DEFER)
265 dev_err(&pdev->dev,
266 "failed to retrieve stop-ack IRQ: %d\n",
267 q6v5->stop_irq);
268 return q6v5->stop_irq;
269 }
270
271 ret = devm_request_threaded_irq(&pdev->dev, q6v5->stop_irq,
272 NULL, q6v5_stop_interrupt,
273 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
274 "q6v5 stop", q6v5);
275 if (ret) {
276 dev_err(&pdev->dev, "failed to acquire stop-ack IRQ\n");
277 return ret;
278 }
279
280 q6v5->state = qcom_smem_state_get(&pdev->dev, "stop", &q6v5->stop_bit);
281 if (IS_ERR(q6v5->state)) {
282 dev_err(&pdev->dev, "failed to acquire stop state\n");
283 return PTR_ERR(q6v5->state);
284 }
285
286 return 0;
287}
288EXPORT_SYMBOL_GPL(qcom_q6v5_init);
289
290MODULE_LICENSE("GPL v2");
291MODULE_DESCRIPTION("Qualcomm Peripheral Image Loader for Q6V5");
292

Warning: That file was not part of the compilation database. It may have many parsing errors.