-/*
- * Mac Mini "toonie" mixer control
- *
- * Copyright (c) 2005 by Benjamin Herrenschmidt <benh@kernel.crashing.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <sound/driver.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/i2c.h>
-#include <linux/kmod.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <sound/core.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/machdep.h>
-#include <asm/pmac_feature.h>
-#include "pmac.h"
-
-#undef DEBUG
-
-#ifdef DEBUG
-#define DBG(fmt...) printk(fmt)
-#else
-#define DBG(fmt...)
-#endif
-
-struct pmac_gpio {
- unsigned int addr;
- u8 active_val;
- u8 inactive_val;
- u8 active_state;
-};
-
-struct pmac_toonie
-{
- struct pmac_gpio hp_detect_gpio;
- struct pmac_gpio hp_mute_gpio;
- struct pmac_gpio amp_mute_gpio;
- int hp_detect_irq;
- int auto_mute_notify;
- struct work_struct detect_work;
-};
-
-
-/*
- * gpio access
- */
-#define do_gpio_write(gp, val) \
- pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, (gp)->addr, val)
-#define do_gpio_read(gp) \
- pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, (gp)->addr, 0)
-#define tumbler_gpio_free(gp) /* NOP */
-
-static void write_audio_gpio(struct pmac_gpio *gp, int active)
-{
- if (! gp->addr)
- return;
- active = active ? gp->active_val : gp->inactive_val;
- do_gpio_write(gp, active);
- DBG("(I) gpio %x write %d\n", gp->addr, active);
-}
-
-static int check_audio_gpio(struct pmac_gpio *gp)
-{
- int ret;
-
- if (! gp->addr)
- return 0;
-
- ret = do_gpio_read(gp);
-
- return (ret & 0xd) == (gp->active_val & 0xd);
-}
-
-static int read_audio_gpio(struct pmac_gpio *gp)
-{
- int ret;
- if (! gp->addr)
- return 0;
- ret = ((do_gpio_read(gp) & 0x02) !=0);
- return ret == gp->active_state;
-}
-
-
-enum { TOONIE_MUTE_HP, TOONIE_MUTE_AMP };
-
-static int toonie_get_mute_switch(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
-{
- struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
- struct pmac_toonie *mix = chip->mixer_data;
- struct pmac_gpio *gp;
-
- if (mix == NULL)
- return -ENODEV;
- switch(kcontrol->private_value) {
- case TOONIE_MUTE_HP:
- gp = &mix->hp_mute_gpio;
- break;
- case TOONIE_MUTE_AMP:
- gp = &mix->amp_mute_gpio;
- break;
- default:
- return -EINVAL;
- }
- ucontrol->value.integer.value[0] = !check_audio_gpio(gp);
- return 0;
-}
-
-static int toonie_put_mute_switch(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
-{
- struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
- struct pmac_toonie *mix = chip->mixer_data;
- struct pmac_gpio *gp;
- int val;
-
- if (chip->update_automute && chip->auto_mute)
- return 0; /* don't touch in the auto-mute mode */
-
- if (mix == NULL)
- return -ENODEV;
-
- switch(kcontrol->private_value) {
- case TOONIE_MUTE_HP:
- gp = &mix->hp_mute_gpio;
- break;
- case TOONIE_MUTE_AMP:
- gp = &mix->amp_mute_gpio;
- break;
- default:
- return -EINVAL;
- }
- val = ! check_audio_gpio(gp);
- if (val != ucontrol->value.integer.value[0]) {
- write_audio_gpio(gp, ! ucontrol->value.integer.value[0]);
- return 1;
- }
- return 0;
-}
-
-static struct snd_kcontrol_new toonie_hp_sw __initdata = {
- .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
- .name = "Headphone Playback Switch",
- .info = snd_pmac_boolean_mono_info,
- .get = toonie_get_mute_switch,
- .put = toonie_put_mute_switch,
- .private_value = TOONIE_MUTE_HP,
-};
-static struct snd_kcontrol_new toonie_speaker_sw __initdata = {
- .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
- .name = "PC Speaker Playback Switch",
- .info = snd_pmac_boolean_mono_info,
- .get = toonie_get_mute_switch,
- .put = toonie_put_mute_switch,
- .private_value = TOONIE_MUTE_AMP,
-};
-
-/*
- * auto-mute stuffs
- */
-static int toonie_detect_headphone(struct snd_pmac *chip)
-{
- struct pmac_toonie *mix = chip->mixer_data;
- int detect = 0;
-
- if (mix->hp_detect_gpio.addr)
- detect |= read_audio_gpio(&mix->hp_detect_gpio);
- return detect;
-}
-
-static void toonie_check_mute(struct snd_pmac *chip, struct pmac_gpio *gp, int val,
- int do_notify, struct snd_kcontrol *sw)
-{
- if (check_audio_gpio(gp) != val) {
- write_audio_gpio(gp, val);
- if (do_notify)
- snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
- &sw->id);
- }
-}
-
-static void toonie_detect_handler(void *self)
-{
- struct snd_pmac *chip = (struct snd_pmac *) self;
- struct pmac_toonie *mix;
- int headphone;
-
- if (!chip)
- return;
-
- mix = chip->mixer_data;
- snd_assert(mix, return);
-
- headphone = toonie_detect_headphone(chip);
-
- DBG("headphone: %d, lineout: %d\n", headphone, lineout);
-
- if (headphone) {
- /* unmute headphone/lineout & mute speaker */
- toonie_check_mute(chip, &mix->hp_mute_gpio, 0,
- mix->auto_mute_notify, chip->master_sw_ctl);
- toonie_check_mute(chip, &mix->amp_mute_gpio, 1,
- mix->auto_mute_notify, chip->speaker_sw_ctl);
- } else {
- /* unmute speaker, mute others */
- toonie_check_mute(chip, &mix->amp_mute_gpio, 0,
- mix->auto_mute_notify, chip->speaker_sw_ctl);
- toonie_check_mute(chip, &mix->hp_mute_gpio, 1,
- mix->auto_mute_notify, chip->master_sw_ctl);
- }
- if (mix->auto_mute_notify) {
- snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
- &chip->hp_detect_ctl->id);
- }
-}
-
-static void toonie_update_automute(struct snd_pmac *chip, int do_notify)
-{
- if (chip->auto_mute) {
- struct pmac_toonie *mix;
- mix = chip->mixer_data;
- snd_assert(mix, return);
- mix->auto_mute_notify = do_notify;
- schedule_work(&mix->detect_work);
- }
-}
-
-/* interrupt - headphone plug changed */
-static irqreturn_t toonie_hp_intr(int irq, void *devid, struct pt_regs *regs)
-{
- struct snd_pmac *chip = devid;
-
- if (chip->update_automute && chip->initialized) {
- chip->update_automute(chip, 1);
- return IRQ_HANDLED;
- }
- return IRQ_NONE;
-}
-
-/* look for audio gpio device */
-static int find_audio_gpio(const char *name, const char *platform,
- struct pmac_gpio *gp)
-{
- struct device_node *np;
- u32 *base, addr;
-
- if (! (np = find_devices("gpio")))
- return -ENODEV;
-
- for (np = np->child; np; np = np->sibling) {
- char *property = get_property(np, "audio-gpio", NULL);
- if (property && strcmp(property, name) == 0)
- break;
- if (device_is_compatible(np, name))
- break;
- }
- if (np == NULL)
- return -ENODEV;
-
- base = (u32 *)get_property(np, "AAPL,address", NULL);
- if (! base) {
- base = (u32 *)get_property(np, "reg", NULL);
- if (!base) {
- DBG("(E) cannot find address for device %s !\n", name);
- return -ENODEV;
- }
- addr = *base;
- if (addr < 0x50)
- addr += 0x50;
- } else
- addr = *base;
-
- gp->addr = addr & 0x0000ffff;
-
- /* Try to find the active state, default to 0 ! */
- base = (u32 *)get_property(np, "audio-gpio-active-state", NULL);
- if (base) {
- gp->active_state = *base;
- gp->active_val = (*base) ? 0x5 : 0x4;
- gp->inactive_val = (*base) ? 0x4 : 0x5;
- } else {
- u32 *prop = NULL;
- gp->active_state = 0;
- gp->active_val = 0x4;
- gp->inactive_val = 0x5;
- /* Here are some crude hacks to extract the GPIO polarity and
- * open collector informations out of the do-platform script
- * as we don't yet have an interpreter for these things
- */
- if (platform)
- prop = (u32 *)get_property(np, platform, NULL);
- if (prop) {
- if (prop[3] == 0x9 && prop[4] == 0x9) {
- gp->active_val = 0xd;
- gp->inactive_val = 0xc;
- }
- if (prop[3] == 0x1 && prop[4] == 0x1) {
- gp->active_val = 0x5;
- gp->inactive_val = 0x4;
- }
- }
- }
-
- DBG("(I) GPIO device %s found, offset: %x, active state: %d !\n",
- name, gp->addr, gp->active_state);
-
- return (np->n_intrs > 0) ? np->intrs[0].line : 0;
-}
-
-static void toonie_cleanup(struct snd_pmac *chip)
-{
- struct pmac_toonie *mix = chip->mixer_data;
- if (! mix)
- return;
- if (mix->hp_detect_irq >= 0)
- free_irq(mix->hp_detect_irq, chip);
- kfree(mix);
- chip->mixer_data = NULL;
-}
-
-int __init snd_pmac_toonie_init(struct snd_pmac *chip)
-{
- struct pmac_toonie *mix;
-
- mix = kmalloc(sizeof(*mix), GFP_KERNEL);
- if (! mix)
- return -ENOMEM;
-
- chip->mixer_data = mix;
- chip->mixer_free = toonie_cleanup;
-
- find_audio_gpio("headphone-mute", NULL, &mix->hp_mute_gpio);
- find_audio_gpio("amp-mute", NULL, &mix->amp_mute_gpio);
- mix->hp_detect_irq = find_audio_gpio("headphone-detect",
- NULL, &mix->hp_detect_gpio);
-
- strcpy(chip->card->mixername, "PowerMac Toonie");
-
- chip->master_sw_ctl = snd_ctl_new1(&toonie_hp_sw, chip);
- snd_ctl_add(chip->card, chip->master_sw_ctl);
-
- chip->speaker_sw_ctl = snd_ctl_new1(&toonie_speaker_sw, chip);
- snd_ctl_add(chip->card, chip->speaker_sw_ctl);
-
- INIT_WORK(&mix->detect_work, toonie_detect_handler, (void *)chip);
-
- if (mix->hp_detect_irq >= 0) {
- snd_pmac_add_automute(chip);
-
- chip->detect_headphone = toonie_detect_headphone;
- chip->update_automute = toonie_update_automute;
- toonie_update_automute(chip, 0);
-
- if (request_irq(mix->hp_detect_irq, toonie_hp_intr, 0,
- "Sound Headphone Detection", chip) < 0)
- mix->hp_detect_irq = -1;
- }
-
- return 0;
-}
-
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff