summaryrefslogtreecommitdiffstats
path: root/sound/aoa/core/snd-aoa-gpio-feature.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/aoa/core/snd-aoa-gpio-feature.c')
-rw-r--r--sound/aoa/core/snd-aoa-gpio-feature.c408
1 files changed, 0 insertions, 408 deletions
diff --git a/sound/aoa/core/snd-aoa-gpio-feature.c b/sound/aoa/core/snd-aoa-gpio-feature.c
deleted file mode 100644
index 805dcbff2257..000000000000
--- a/sound/aoa/core/snd-aoa-gpio-feature.c
+++ /dev/null
@@ -1,408 +0,0 @@
-/*
- * Apple Onboard Audio feature call GPIO control
- *
- * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
- *
- * GPL v2, can be found in COPYING.
- *
- * This file contains the GPIO control routines for
- * direct (through feature calls) access to the GPIO
- * registers.
- */
-
-#include <asm/pmac_feature.h>
-#include <linux/interrupt.h>
-#include "../aoa.h"
-
-/* TODO: these are 20 global variables
- * that aren't used on most machines...
- * Move them into a dynamically allocated
- * structure and use that.
- */
-
-/* these are the GPIO numbers (register addresses as offsets into
- * the GPIO space) */
-static int headphone_mute_gpio;
-static int amp_mute_gpio;
-static int lineout_mute_gpio;
-static int hw_reset_gpio;
-static int lineout_detect_gpio;
-static int headphone_detect_gpio;
-static int linein_detect_gpio;
-
-/* see the SWITCH_GPIO macro */
-static int headphone_mute_gpio_activestate;
-static int amp_mute_gpio_activestate;
-static int lineout_mute_gpio_activestate;
-static int hw_reset_gpio_activestate;
-static int lineout_detect_gpio_activestate;
-static int headphone_detect_gpio_activestate;
-static int linein_detect_gpio_activestate;
-
-/* node pointers that we save when getting the GPIO number
- * to get the interrupt later */
-static struct device_node *lineout_detect_node;
-static struct device_node *linein_detect_node;
-static struct device_node *headphone_detect_node;
-
-static int lineout_detect_irq;
-static int linein_detect_irq;
-static int headphone_detect_irq;
-
-static struct device_node *get_gpio(char *name,
- char *altname,
- int *gpioptr,
- int *gpioactiveptr)
-{
- struct device_node *np, *gpio;
- const u32 *reg;
- const char *audio_gpio;
-
- *gpioptr = -1;
-
- /* check if we can get it the easy way ... */
- np = of_find_node_by_name(NULL, name);
- if (!np) {
- /* some machines have only gpioX/extint-gpioX nodes,
- * and an audio-gpio property saying what it is ...
- * So what we have to do is enumerate all children
- * of the gpio node and check them all. */
- gpio = of_find_node_by_name(NULL, "gpio");
- if (!gpio)
- return NULL;
- while ((np = of_get_next_child(gpio, np))) {
- audio_gpio = of_get_property(np, "audio-gpio", NULL);
- if (!audio_gpio)
- continue;
- if (strcmp(audio_gpio, name) == 0)
- break;
- if (altname && (strcmp(audio_gpio, altname) == 0))
- break;
- }
- /* still not found, assume not there */
- if (!np)
- return NULL;
- }
-
- reg = of_get_property(np, "reg", NULL);
- if (!reg)
- return NULL;
-
- *gpioptr = *reg;
-
- /* this is a hack, usually the GPIOs 'reg' property
- * should have the offset based from the GPIO space
- * which is at 0x50, but apparently not always... */
- if (*gpioptr < 0x50)
- *gpioptr += 0x50;
-
- reg = of_get_property(np, "audio-gpio-active-state", NULL);
- if (!reg)
- /* Apple seems to default to 1, but
- * that doesn't seem right at least on most
- * machines. So until proven that the opposite
- * is necessary, we default to 0
- * (which, incidentally, snd-powermac also does...) */
- *gpioactiveptr = 0;
- else
- *gpioactiveptr = *reg;
-
- return np;
-}
-
-static void get_irq(struct device_node * np, int *irqptr)
-{
- if (np)
- *irqptr = irq_of_parse_and_map(np, 0);
- else
- *irqptr = NO_IRQ;
-}
-
-/* 0x4 is outenable, 0x1 is out, thus 4 or 5 */
-#define SWITCH_GPIO(name, v, on) \
- (((v)&~1) | ((on)? \
- (name##_gpio_activestate==0?4:5): \
- (name##_gpio_activestate==0?5:4)))
-
-#define FTR_GPIO(name, bit) \
-static void ftr_gpio_set_##name(struct gpio_runtime *rt, int on)\
-{ \
- int v; \
- \
- if (unlikely(!rt)) return; \
- \
- if (name##_mute_gpio < 0) \
- return; \
- \
- v = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, \
- name##_mute_gpio, \
- 0); \
- \
- /* muted = !on... */ \
- v = SWITCH_GPIO(name##_mute, v, !on); \
- \
- pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, \
- name##_mute_gpio, v); \
- \
- rt->implementation_private &= ~(1<<bit); \
- rt->implementation_private |= (!!on << bit); \
-} \
-static int ftr_gpio_get_##name(struct gpio_runtime *rt) \
-{ \
- if (unlikely(!rt)) return 0; \
- return (rt->implementation_private>>bit)&1; \
-}
-
-FTR_GPIO(headphone, 0);
-FTR_GPIO(amp, 1);
-FTR_GPIO(lineout, 2);
-
-static void ftr_gpio_set_hw_reset(struct gpio_runtime *rt, int on)
-{
- int v;
-
- if (unlikely(!rt)) return;
- if (hw_reset_gpio < 0)
- return;
-
- v = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL,
- hw_reset_gpio, 0);
- v = SWITCH_GPIO(hw_reset, v, on);
- pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL,
- hw_reset_gpio, v);
-}
-
-static void ftr_gpio_all_amps_off(struct gpio_runtime *rt)
-{
- int saved;
-
- if (unlikely(!rt)) return;
- saved = rt->implementation_private;
- ftr_gpio_set_headphone(rt, 0);
- ftr_gpio_set_amp(rt, 0);
- ftr_gpio_set_lineout(rt, 0);
- rt->implementation_private = saved;
-}
-
-static void ftr_gpio_all_amps_restore(struct gpio_runtime *rt)
-{
- int s;
-
- if (unlikely(!rt)) return;
- s = rt->implementation_private;
- ftr_gpio_set_headphone(rt, (s>>0)&1);
- ftr_gpio_set_amp(rt, (s>>1)&1);
- ftr_gpio_set_lineout(rt, (s>>2)&1);
-}
-
-static void ftr_handle_notify(struct work_struct *work)
-{
- struct gpio_notification *notif =
- container_of(work, struct gpio_notification, work.work);
-
- mutex_lock(&notif->mutex);
- if (notif->notify)
- notif->notify(notif->data);
- mutex_unlock(&notif->mutex);
-}
-
-static void gpio_enable_dual_edge(int gpio)
-{
- int v;
-
- if (gpio == -1)
- return;
- v = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, gpio, 0);
- v |= 0x80; /* enable dual edge */
- pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, gpio, v);
-}
-
-static void ftr_gpio_init(struct gpio_runtime *rt)
-{
- get_gpio("headphone-mute", NULL,
- &headphone_mute_gpio,
- &headphone_mute_gpio_activestate);
- get_gpio("amp-mute", NULL,
- &amp_mute_gpio,
- &amp_mute_gpio_activestate);
- get_gpio("lineout-mute", NULL,
- &lineout_mute_gpio,
- &lineout_mute_gpio_activestate);
- get_gpio("hw-reset", "audio-hw-reset",
- &hw_reset_gpio,
- &hw_reset_gpio_activestate);
-
- headphone_detect_node = get_gpio("headphone-detect", NULL,
- &headphone_detect_gpio,
- &headphone_detect_gpio_activestate);
- /* go Apple, and thanks for giving these different names
- * across the board... */
- lineout_detect_node = get_gpio("lineout-detect", "line-output-detect",
- &lineout_detect_gpio,
- &lineout_detect_gpio_activestate);
- linein_detect_node = get_gpio("linein-detect", "line-input-detect",
- &linein_detect_gpio,
- &linein_detect_gpio_activestate);
-
- gpio_enable_dual_edge(headphone_detect_gpio);
- gpio_enable_dual_edge(lineout_detect_gpio);
- gpio_enable_dual_edge(linein_detect_gpio);
-
- get_irq(headphone_detect_node, &headphone_detect_irq);
- get_irq(lineout_detect_node, &lineout_detect_irq);
- get_irq(linein_detect_node, &linein_detect_irq);
-
- ftr_gpio_all_amps_off(rt);
- rt->implementation_private = 0;
- INIT_DELAYED_WORK(&rt->headphone_notify.work, ftr_handle_notify);
- INIT_DELAYED_WORK(&rt->line_in_notify.work, ftr_handle_notify);
- INIT_DELAYED_WORK(&rt->line_out_notify.work, ftr_handle_notify);
- mutex_init(&rt->headphone_notify.mutex);
- mutex_init(&rt->line_in_notify.mutex);
- mutex_init(&rt->line_out_notify.mutex);
-}
-
-static void ftr_gpio_exit(struct gpio_runtime *rt)
-{
- ftr_gpio_all_amps_off(rt);
- rt->implementation_private = 0;
- if (rt->headphone_notify.notify)
- free_irq(headphone_detect_irq, &rt->headphone_notify);
- if (rt->line_in_notify.gpio_private)
- free_irq(linein_detect_irq, &rt->line_in_notify);
- if (rt->line_out_notify.gpio_private)
- free_irq(lineout_detect_irq, &rt->line_out_notify);
- 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);
-}
-
-static irqreturn_t ftr_handle_notify_irq(int xx, void *data)
-{
- struct gpio_notification *notif = data;
-
- schedule_delayed_work(&notif->work, 0);
-
- return IRQ_HANDLED;
-}
-
-static int ftr_set_notify(struct gpio_runtime *rt,
- enum notify_type type,
- notify_func_t notify,
- void *data)
-{
- struct gpio_notification *notif;
- notify_func_t old;
- int irq;
- char *name;
- int err = -EBUSY;
-
- switch (type) {
- case AOA_NOTIFY_HEADPHONE:
- notif = &rt->headphone_notify;
- name = "headphone-detect";
- irq = headphone_detect_irq;
- break;
- case AOA_NOTIFY_LINE_IN:
- notif = &rt->line_in_notify;
- name = "linein-detect";
- irq = linein_detect_irq;
- break;
- case AOA_NOTIFY_LINE_OUT:
- notif = &rt->line_out_notify;
- name = "lineout-detect";
- irq = lineout_detect_irq;
- break;
- default:
- return -EINVAL;
- }
-
- if (irq == NO_IRQ)
- return -ENODEV;
-
- mutex_lock(&notif->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)
- free_irq(irq, notif);
-
- if (!old && notify) {
- err = request_irq(irq, ftr_handle_notify_irq, 0, name, notif);
- if (err)
- goto out_unlock;
- }
-
- notif->notify = notify;
- notif->data = data;
-
- err = 0;
- out_unlock:
- mutex_unlock(&notif->mutex);
- return err;
-}
-
-static int ftr_get_detect(struct gpio_runtime *rt,
- enum notify_type type)
-{
- int gpio, ret, active;
-
- switch (type) {
- case AOA_NOTIFY_HEADPHONE:
- gpio = headphone_detect_gpio;
- active = headphone_detect_gpio_activestate;
- break;
- case AOA_NOTIFY_LINE_IN:
- gpio = linein_detect_gpio;
- active = linein_detect_gpio_activestate;
- break;
- case AOA_NOTIFY_LINE_OUT:
- gpio = lineout_detect_gpio;
- active = lineout_detect_gpio_activestate;
- break;
- default:
- return -EINVAL;
- }
-
- if (gpio == -1)
- return -ENODEV;
-
- ret = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, gpio, 0);
- if (ret < 0)
- return ret;
- return ((ret >> 1) & 1) == active;
-}
-
-static struct gpio_methods methods = {
- .init = ftr_gpio_init,
- .exit = ftr_gpio_exit,
- .all_amps_off = ftr_gpio_all_amps_off,
- .all_amps_restore = ftr_gpio_all_amps_restore,
- .set_headphone = ftr_gpio_set_headphone,
- .set_speakers = ftr_gpio_set_amp,
- .set_lineout = ftr_gpio_set_lineout,
- .set_hw_reset = ftr_gpio_set_hw_reset,
- .get_headphone = ftr_gpio_get_headphone,
- .get_speakers = ftr_gpio_get_amp,
- .get_lineout = ftr_gpio_get_lineout,
- .set_notify = ftr_set_notify,
- .get_detect = ftr_get_detect,
-};
-
-struct gpio_methods *ftr_gpio_methods = &methods;
-EXPORT_SYMBOL_GPL(ftr_gpio_methods);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-12 02:21:52 +0000