diff options
Diffstat (limited to 'ANDROID_3.4.5/sound/aoa/core/gpio-feature.c')
| -rw-r--r-- | ANDROID_3.4.5/sound/aoa/core/gpio-feature.c | 422 |
1 files changed, 0 insertions, 422 deletions
diff --git a/ANDROID_3.4.5/sound/aoa/core/gpio-feature.c b/ANDROID_3.4.5/sound/aoa/core/gpio-feature.c deleted file mode 100644 index faa31749..00000000 --- a/ANDROID_3.4.5/sound/aoa/core/gpio-feature.c +++ /dev/null @@ -1,422 +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 lots of 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 master_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 master_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); -FTR_GPIO(master, 3); - -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 struct gpio_methods methods; - -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); - if (methods.set_master) - ftr_gpio_set_master(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); - if (methods.set_master) - ftr_gpio_set_master(rt, (s>>3)&1); -} - -static void ftr_handle_notify(struct work_struct *work) -{ - struct gpio_notification *notif = - container_of(work, struct gpio_notification, work.work); - - mutex_lock(¬if->mutex); - if (notif->notify) - notif->notify(notif->data); - mutex_unlock(¬if->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, - &_mute_gpio, - &_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); - if (get_gpio("master-mute", NULL, - &master_mute_gpio, - &master_mute_gpio_activestate)) { - methods.set_master = ftr_gpio_set_master; - methods.get_master = ftr_gpio_get_master; - } - - 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_sync(&rt->headphone_notify.work); - cancel_delayed_work_sync(&rt->line_in_notify.work); - cancel_delayed_work_sync(&rt->line_out_notify.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(¬if->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(¬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) - 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(¬if->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); |