/* * 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/i2c-dev.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(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol) { pmac_t *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(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol) { pmac_t *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 snd_kcontrol_new_t 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 snd_kcontrol_new_t 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(pmac_t *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(pmac_t *chip, struct pmac_gpio *gp, int val, int do_notify, snd_kcontrol_t *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) { pmac_t *chip = (pmac_t*) 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(pmac_t *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) { pmac_t *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(pmac_t *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 snd_pmac_toonie_init(pmac_t *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; }