1
2
3
4
5
6
7
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_common.h"
17#include "qcom_q6v5.h"
18
19#define Q6V5_PANIC_DELAY_MS 200
20
21
22
23
24
25
26
27int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5)
28{
29 reinit_completion(&q6v5->start_done);
30 reinit_completion(&q6v5->stop_done);
31
32 q6v5->running = true;
33 q6v5->handover_issued = false;
34
35 enable_irq(q6v5->handover_irq);
36
37 return 0;
38}
39EXPORT_SYMBOL_GPL(qcom_q6v5_prepare);
40
41
42
43
44
45
46
47int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5)
48{
49 disable_irq(q6v5->handover_irq);
50
51 return !q6v5->handover_issued;
52}
53EXPORT_SYMBOL_GPL(qcom_q6v5_unprepare);
54
55static irqreturn_t q6v5_wdog_interrupt(int irq, void *data)
56{
57 struct qcom_q6v5 *q6v5 = data;
58 size_t len;
59 char *msg;
60
61
62 if (!q6v5->running) {
63 complete(&q6v5->stop_done);
64 return IRQ_HANDLED;
65 }
66
67 msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len);
68 if (!IS_ERR(msg) && len > 0 && msg[0])
69 dev_err(q6v5->dev, "watchdog received: %s\n", msg);
70 else
71 dev_err(q6v5->dev, "watchdog without message\n");
72
73 rproc_report_crash(q6v5->rproc, RPROC_WATCHDOG);
74
75 return IRQ_HANDLED;
76}
77
78static irqreturn_t q6v5_fatal_interrupt(int irq, void *data)
79{
80 struct qcom_q6v5 *q6v5 = data;
81 size_t len;
82 char *msg;
83
84 msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len);
85 if (!IS_ERR(msg) && len > 0 && msg[0])
86 dev_err(q6v5->dev, "fatal error received: %s\n", msg);
87 else
88 dev_err(q6v5->dev, "fatal error without message\n");
89
90 q6v5->running = false;
91 rproc_report_crash(q6v5->rproc, RPROC_FATAL_ERROR);
92
93 return IRQ_HANDLED;
94}
95
96static irqreturn_t q6v5_ready_interrupt(int irq, void *data)
97{
98 struct qcom_q6v5 *q6v5 = data;
99
100 complete(&q6v5->start_done);
101
102 return IRQ_HANDLED;
103}
104
105
106
107
108
109
110
111
112
113
114int qcom_q6v5_wait_for_start(struct qcom_q6v5 *q6v5, int timeout)
115{
116 int ret;
117
118 ret = wait_for_completion_timeout(&q6v5->start_done, timeout);
119 if (!ret)
120 disable_irq(q6v5->handover_irq);
121
122 return !ret ? -ETIMEDOUT : 0;
123}
124EXPORT_SYMBOL_GPL(qcom_q6v5_wait_for_start);
125
126static irqreturn_t q6v5_handover_interrupt(int irq, void *data)
127{
128 struct qcom_q6v5 *q6v5 = data;
129
130 if (q6v5->handover)
131 q6v5->handover(q6v5);
132
133 q6v5->handover_issued = true;
134
135 return IRQ_HANDLED;
136}
137
138static irqreturn_t q6v5_stop_interrupt(int irq, void *data)
139{
140 struct qcom_q6v5 *q6v5 = data;
141
142 complete(&q6v5->stop_done);
143
144 return IRQ_HANDLED;
145}
146
147
148
149
150
151
152
153
154int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5, struct qcom_sysmon *sysmon)
155{
156 int ret;
157
158 q6v5->running = false;
159
160
161 if (qcom_sysmon_shutdown_acked(sysmon))
162 return 0;
163
164 qcom_smem_state_update_bits(q6v5->state,
165 BIT(q6v5->stop_bit), BIT(q6v5->stop_bit));
166
167 ret = wait_for_completion_timeout(&q6v5->stop_done, 5 * HZ);
168
169 qcom_smem_state_update_bits(q6v5->state, BIT(q6v5->stop_bit), 0);
170
171 return ret == 0 ? -ETIMEDOUT : 0;
172}
173EXPORT_SYMBOL_GPL(qcom_q6v5_request_stop);
174
175
176
177
178
179
180
181
182
183
184unsigned long qcom_q6v5_panic(struct qcom_q6v5 *q6v5)
185{
186 qcom_smem_state_update_bits(q6v5->state,
187 BIT(q6v5->stop_bit), BIT(q6v5->stop_bit));
188
189 return Q6V5_PANIC_DELAY_MS;
190}
191EXPORT_SYMBOL_GPL(qcom_q6v5_panic);
192
193
194
195
196
197
198
199
200
201
202
203int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
204 struct rproc *rproc, int crash_reason,
205 void (*handover)(struct qcom_q6v5 *q6v5))
206{
207 int ret;
208
209 q6v5->rproc = rproc;
210 q6v5->dev = &pdev->dev;
211 q6v5->crash_reason = crash_reason;
212 q6v5->handover = handover;
213
214 init_completion(&q6v5->start_done);
215 init_completion(&q6v5->stop_done);
216
217 q6v5->wdog_irq = platform_get_irq_byname(pdev, "wdog");
218 if (q6v5->wdog_irq < 0)
219 return q6v5->wdog_irq;
220
221 ret = devm_request_threaded_irq(&pdev->dev, q6v5->wdog_irq,
222 NULL, q6v5_wdog_interrupt,
223 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
224 "q6v5 wdog", q6v5);
225 if (ret) {
226 dev_err(&pdev->dev, "failed to acquire wdog IRQ\n");
227 return ret;
228 }
229
230 q6v5->fatal_irq = platform_get_irq_byname(pdev, "fatal");
231 if (q6v5->fatal_irq < 0)
232 return q6v5->fatal_irq;
233
234 ret = devm_request_threaded_irq(&pdev->dev, q6v5->fatal_irq,
235 NULL, q6v5_fatal_interrupt,
236 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
237 "q6v5 fatal", q6v5);
238 if (ret) {
239 dev_err(&pdev->dev, "failed to acquire fatal IRQ\n");
240 return ret;
241 }
242
243 q6v5->ready_irq = platform_get_irq_byname(pdev, "ready");
244 if (q6v5->ready_irq < 0)
245 return q6v5->ready_irq;
246
247 ret = devm_request_threaded_irq(&pdev->dev, q6v5->ready_irq,
248 NULL, q6v5_ready_interrupt,
249 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
250 "q6v5 ready", q6v5);
251 if (ret) {
252 dev_err(&pdev->dev, "failed to acquire ready IRQ\n");
253 return ret;
254 }
255
256 q6v5->handover_irq = platform_get_irq_byname(pdev, "handover");
257 if (q6v5->handover_irq < 0)
258 return q6v5->handover_irq;
259
260 ret = devm_request_threaded_irq(&pdev->dev, q6v5->handover_irq,
261 NULL, q6v5_handover_interrupt,
262 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
263 "q6v5 handover", q6v5);
264 if (ret) {
265 dev_err(&pdev->dev, "failed to acquire handover IRQ\n");
266 return ret;
267 }
268 disable_irq(q6v5->handover_irq);
269
270 q6v5->stop_irq = platform_get_irq_byname(pdev, "stop-ack");
271 if (q6v5->stop_irq < 0)
272 return q6v5->stop_irq;
273
274 ret = devm_request_threaded_irq(&pdev->dev, q6v5->stop_irq,
275 NULL, q6v5_stop_interrupt,
276 IRQF_TRIGGER_RISING | IRQF_ONESHOT,
277 "q6v5 stop", q6v5);
278 if (ret) {
279 dev_err(&pdev->dev, "failed to acquire stop-ack IRQ\n");
280 return ret;
281 }
282
283 q6v5->state = qcom_smem_state_get(&pdev->dev, "stop", &q6v5->stop_bit);
284 if (IS_ERR(q6v5->state)) {
285 dev_err(&pdev->dev, "failed to acquire stop state\n");
286 return PTR_ERR(q6v5->state);
287 }
288
289 return 0;
290}
291EXPORT_SYMBOL_GPL(qcom_q6v5_init);
292
293MODULE_LICENSE("GPL v2");
294MODULE_DESCRIPTION("Qualcomm Peripheral Image Loader for Q6V5");
295