--- /dev/null
+/*
+ * Apple Onboard Audio pmf GPIOs
+ *
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * GPL v2, can be found in COPYING.
+ */
+
+#include <asm/pmac_feature.h>
+#include <asm/pmac_pfunc.h>
+#include "../aoa.h"
+
+#define PMF_GPIO(name, bit) \
+static void pmf_gpio_set_##name(struct gpio_runtime *rt, int on)\
+{ \
+ struct pmf_args args = { .count = 1, .u[0].v = !on }; \
+ int rc; \
+ \
+ if (unlikely(!rt)) return; \
+ rc = pmf_call_function(rt->node, #name "-mute", &args); \
+ if (rc && rc != -ENODEV) \
+ printk(KERN_WARNING "pmf_gpio_set_" #name \
+ " failed, rc: %d\n", rc); \
+ rt->implementation_private &= ~(1<<bit); \
+ rt->implementation_private |= (!!on << bit); \
+} \
+static int pmf_gpio_get_##name(struct gpio_runtime *rt) \
+{ \
+ if (unlikely(!rt)) return 0; \
+ return (rt->implementation_private>>bit)&1; \
+}
+
+PMF_GPIO(headphone, 0);
+PMF_GPIO(amp, 1);
+PMF_GPIO(lineout, 2);
+
+static void pmf_gpio_set_hw_reset(struct gpio_runtime *rt, int on)
+{
+ struct pmf_args args = { .count = 1, .u[0].v = !!on };
+ int rc;
+
+ if (unlikely(!rt)) return;
+ rc = pmf_call_function(rt->node, "hw-reset", &args);
+ if (rc)
+ printk(KERN_WARNING "pmf_gpio_set_hw_reset"
+ " failed, rc: %d\n", rc);
+}
+
+static void pmf_gpio_all_amps_off(struct gpio_runtime *rt)
+{
+ int saved;
+
+ if (unlikely(!rt)) return;
+ saved = rt->implementation_private;
+ pmf_gpio_set_headphone(rt, 0);
+ pmf_gpio_set_amp(rt, 0);
+ pmf_gpio_set_lineout(rt, 0);
+ rt->implementation_private = saved;
+}
+
+static void pmf_gpio_all_amps_restore(struct gpio_runtime *rt)
+{
+ int s;
+
+ if (unlikely(!rt)) return;
+ s = rt->implementation_private;
+ pmf_gpio_set_headphone(rt, (s>>0)&1);
+ pmf_gpio_set_amp(rt, (s>>1)&1);
+ pmf_gpio_set_lineout(rt, (s>>2)&1);
+}
+
+static void pmf_handle_notify(void *data)
+{
+ struct gpio_notification *notif = data;
+
+ mutex_lock(¬if->mutex);
+ if (notif->notify)
+ notif->notify(notif->data);
+ mutex_unlock(¬if->mutex);
+}
+
+static void pmf_gpio_init(struct gpio_runtime *rt)
+{
+ pmf_gpio_all_amps_off(rt);
+ rt->implementation_private = 0;
+ INIT_WORK(&rt->headphone_notify.work, pmf_handle_notify,
+ &rt->headphone_notify);
+ INIT_WORK(&rt->line_in_notify.work, pmf_handle_notify,
+ &rt->line_in_notify);
+ INIT_WORK(&rt->line_out_notify.work, pmf_handle_notify,
+ &rt->line_out_notify);
+ mutex_init(&rt->headphone_notify.mutex);
+ mutex_init(&rt->line_in_notify.mutex);
+ mutex_init(&rt->line_out_notify.mutex);
+}
+
+static void pmf_gpio_exit(struct gpio_runtime *rt)
+{
+ pmf_gpio_all_amps_off(rt);
+ rt->implementation_private = 0;
+
+ if (rt->headphone_notify.gpio_private)
+ pmf_unregister_irq_client(rt->headphone_notify.gpio_private);
+ if (rt->line_in_notify.gpio_private)
+ pmf_unregister_irq_client(rt->line_in_notify.gpio_private);
+ if (rt->line_out_notify.gpio_private)
+ pmf_unregister_irq_client(rt->line_out_notify.gpio_private);
+
+ /* make sure no work is pending before freeing
+ * all things */
+ cancel_delayed_work(&rt->headphone_notify.work);
+ cancel_delayed_work(&rt->line_in_notify.work);
+ cancel_delayed_work(&rt->line_out_notify.work);
+ flush_scheduled_work();
+
+ mutex_destroy(&rt->headphone_notify.mutex);
+ mutex_destroy(&rt->line_in_notify.mutex);
+ mutex_destroy(&rt->line_out_notify.mutex);
+
+ if (rt->headphone_notify.gpio_private)
+ kfree(rt->headphone_notify.gpio_private);
+ if (rt->line_in_notify.gpio_private)
+ kfree(rt->line_in_notify.gpio_private);
+ if (rt->line_out_notify.gpio_private)
+ kfree(rt->line_out_notify.gpio_private);
+}
+
+static void pmf_handle_notify_irq(void *data)
+{
+ struct gpio_notification *notif = data;
+
+ schedule_work(¬if->work);
+}
+
+static int pmf_set_notify(struct gpio_runtime *rt,
+ enum notify_type type,
+ notify_func_t notify,
+ void *data)
+{
+ struct gpio_notification *notif;
+ notify_func_t old;
+ struct pmf_irq_client *irq_client;
+ char *name;
+ int err = -EBUSY;
+
+ switch (type) {
+ case AOA_NOTIFY_HEADPHONE:
+ notif = &rt->headphone_notify;
+ name = "headphone-detect";
+ break;
+ case AOA_NOTIFY_LINE_IN:
+ notif = &rt->line_in_notify;
+ name = "linein-detect";
+ break;
+ case AOA_NOTIFY_LINE_OUT:
+ notif = &rt->line_out_notify;
+ name = "lineout-detect";
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ mutex_lock(¬if->mutex);
+
+ old = notif->notify;
+
+ if (!old && !notify) {
+ err = 0;
+ goto out_unlock;
+ }
+
+ if (old && notify) {
+ if (old == notify && notif->data == data)
+ err = 0;
+ goto out_unlock;
+ }
+
+ if (old && !notify) {
+ irq_client = notif->gpio_private;
+ pmf_unregister_irq_client(irq_client);
+ kfree(irq_client);
+ notif->gpio_private = NULL;
+ }
+ if (!old && notify) {
+ irq_client = kzalloc(sizeof(struct pmf_irq_client),
+ GFP_KERNEL);
+ irq_client->data = notif;
+ irq_client->handler = pmf_handle_notify_irq;
+ irq_client->owner = THIS_MODULE;
+ err = pmf_register_irq_client(rt->node,
+ name,
+ irq_client);
+ if (err) {
+ printk(KERN_ERR "snd-aoa: gpio layer failed to"
+ " register %s irq (%d)\n", name, err);
+ kfree(irq_client);
+ goto out_unlock;
+ }
+ notif->gpio_private = irq_client;
+ }
+ notif->notify = notify;
+ notif->data = data;
+
+ err = 0;
+ out_unlock:
+ mutex_unlock(¬if->mutex);
+ return err;
+}
+
+static int pmf_get_detect(struct gpio_runtime *rt,
+ enum notify_type type)
+{
+ char *name;
+ int err = -EBUSY, ret;
+ struct pmf_args args = { .count = 1, .u[0].p = &ret };
+
+ switch (type) {
+ case AOA_NOTIFY_HEADPHONE:
+ name = "headphone-detect";
+ break;
+ case AOA_NOTIFY_LINE_IN:
+ name = "linein-detect";
+ break;
+ case AOA_NOTIFY_LINE_OUT:
+ name = "lineout-detect";
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ err = pmf_call_function(rt->node, name, &args);
+ if (err)
+ return err;
+ return ret;
+}
+
+static struct gpio_methods methods = {
+ .init = pmf_gpio_init,
+ .exit = pmf_gpio_exit,
+ .all_amps_off = pmf_gpio_all_amps_off,
+ .all_amps_restore = pmf_gpio_all_amps_restore,
+ .set_headphone = pmf_gpio_set_headphone,
+ .set_speakers = pmf_gpio_set_amp,
+ .set_lineout = pmf_gpio_set_lineout,
+ .set_hw_reset = pmf_gpio_set_hw_reset,
+ .get_headphone = pmf_gpio_get_headphone,
+ .get_speakers = pmf_gpio_get_amp,
+ .get_lineout = pmf_gpio_get_lineout,
+ .set_notify = pmf_set_notify,
+ .get_detect = pmf_get_detect,
+};
+
+struct gpio_methods *pmf_gpio_methods = &methods;
+EXPORT_SYMBOL_GPL(pmf_gpio_methods);
git://git.onelab.eu / linux-2.6.git / blobdiff