Lines Matching refs:env
79 static int envelope_detector_comp_latch(struct envelope *env)
83 spin_lock_irq(&env->comp_lock);
84 comp = env->comp;
85 env->comp = 0;
86 spin_unlock_irq(&env->comp_lock);
98 enable_irq(env->comp_irq);
101 synchronize_irq(env->comp_irq);
104 spin_lock_irq(&env->comp_lock);
105 comp = env->comp;
106 env->comp = 0;
107 spin_unlock_irq(&env->comp_lock);
110 enable_irq(env->comp_irq);
117 struct envelope *env = ctx;
119 spin_lock(&env->comp_lock);
120 env->comp = 1;
121 disable_irq_nosync(env->comp_irq);
122 spin_unlock(&env->comp_lock);
127 static void envelope_detector_setup_compare(struct envelope *env)
136 * env->level ends up as env->low when the termination
138 * ceiling when invert is not active so that env->level
139 * ends up as env->high in that case.
141 env->level = (env->high + env->low + !env->invert) / 2;
143 if (env->high == env->low + 1) {
144 complete(&env->done);
149 ret = iio_write_channel_raw(env->dac, env->invert ? 0 : env->dac_max);
154 envelope_detector_comp_latch(env);
157 ret = iio_write_channel_raw(env->dac, env->level);
162 schedule_delayed_work(&env->comp_timeout,
163 msecs_to_jiffies(env->comp_interval));
167 env->level = ret;
168 complete(&env->done);
173 struct envelope *env = container_of(work, struct envelope,
177 if (!envelope_detector_comp_latch(env) ^ !env->invert)
178 env->low = env->level;
180 env->high = env->level;
183 envelope_detector_setup_compare(env);
190 struct envelope *env = iio_priv(indio_dev);
205 mutex_lock(&env->read_lock);
206 env->high = env->dac_max + env->invert;
207 env->low = -1 + env->invert;
208 envelope_detector_setup_compare(env);
209 wait_for_completion(&env->done);
210 if (env->level < 0) {
211 ret = env->level;
214 *val = env->invert ? env->dac_max - env->level : env->level;
215 mutex_unlock(&env->read_lock);
220 return iio_read_channel_scale(env->dac, val, val2);
226 mutex_unlock(&env->read_lock);
234 struct envelope *env = iio_priv(indio_dev);
236 return sprintf(buf, "%u\n", env->invert);
244 struct envelope *env = iio_priv(indio_dev);
255 trigger = invert ? env->comp_irq_trigger_inv : env->comp_irq_trigger;
257 mutex_lock(&env->read_lock);
258 if (invert != env->invert)
259 ret = irq_set_irq_type(env->comp_irq, trigger);
261 env->invert = invert;
264 mutex_unlock(&env->read_lock);
274 struct envelope *env = iio_priv(indio_dev);
276 return sprintf(buf, "%u\n", env->comp_interval);
284 struct envelope *env = iio_priv(indio_dev);
294 mutex_lock(&env->read_lock);
295 env->comp_interval = interval;
296 mutex_unlock(&env->read_lock);
327 struct envelope *env;
331 indio_dev = devm_iio_device_alloc(dev, sizeof(*env));
336 env = iio_priv(indio_dev);
337 env->comp_interval = 50; /* some sensible default? */
339 spin_lock_init(&env->comp_lock);
340 mutex_init(&env->read_lock);
341 init_completion(&env->done);
342 INIT_DELAYED_WORK(&env->comp_timeout, envelope_detector_timeout);
349 env->dac = devm_iio_channel_get(dev, "dac");
350 if (IS_ERR(env->dac))
351 return dev_err_probe(dev, PTR_ERR(env->dac),
354 env->comp_irq = platform_get_irq_byname(pdev, "comp");
355 if (env->comp_irq < 0)
356 return env->comp_irq;
358 ret = devm_request_irq(dev, env->comp_irq, envelope_detector_comp_isr,
359 0, "envelope-detector", env);
363 env->comp_irq_trigger = irq_get_trigger_type(env->comp_irq);
364 if (env->comp_irq_trigger & IRQF_TRIGGER_RISING)
365 env->comp_irq_trigger_inv |= IRQF_TRIGGER_FALLING;
366 if (env->comp_irq_trigger & IRQF_TRIGGER_FALLING)
367 env->comp_irq_trigger_inv |= IRQF_TRIGGER_RISING;
368 if (env->comp_irq_trigger & IRQF_TRIGGER_HIGH)
369 env->comp_irq_trigger_inv |= IRQF_TRIGGER_LOW;
370 if (env->comp_irq_trigger & IRQF_TRIGGER_LOW)
371 env->comp_irq_trigger_inv |= IRQF_TRIGGER_HIGH;
373 ret = iio_get_channel_type(env->dac, &type);
382 ret = iio_read_max_channel_raw(env->dac, &env->dac_max);