diff options
Diffstat (limited to 'sound/ppc/toonie.c')
| -rw-r--r-- | sound/ppc/toonie.c | 379 |
1 files changed, 379 insertions, 0 deletions
diff --git a/sound/ppc/toonie.c b/sound/ppc/toonie.c new file mode 100644 index 00000000000..082bc4babab --- /dev/null +++ b/sound/ppc/toonie.c @@ -0,0 +1,379 @@ +/* + * 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; +} + |