| changeset 5876: | 2d6164f0bf0e |
| parent: | d773ad622068 |
| author: | tiwai |
| date: | Tue Feb 19 11:56:06 2008 +0100 (4 years ago) |
| permissions: | -rw-r--r-- |
| description: | Dont touch fs_struct in drivers The sound drivers and the pnpbios core test for current->root != NULL. This test seems to be unnecessary since we always have rootfs mounted before initializing the drivers. Patch-level: Merged Signed-off-by: Jan Blunck <jblunck@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Jaroslav Kysela <perex@suse.cz> Acked-by: Takashi Iwai <tiwai@suse.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
1/*2 * PMac DACA lowlevel functions3 *4 * Copyright (c) by Takashi Iwai <tiwai@suse.de>5 *6 * This program is free software; you can redistribute it and/or modify7 * it under the terms of the GNU General Public License as published by8 * the Free Software Foundation; either version 2 of the License, or9 * (at your option) any later version.10 *11 * This program is distributed in the hope that it will be useful,12 * but WITHOUT ANY WARRANTY; without even the implied warranty of13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the14 * GNU General Public License for more details.15 *16 * You should have received a copy of the GNU General Public License17 * along with this program; if not, write to the Free Software18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA19 */202122#include <linux/init.h>23#include <linux/i2c.h>24#include <linux/kmod.h>25#include <linux/slab.h>26#include <sound/core.h>27#include "pmac.h"2829/* i2c address */30#define DACA_I2C_ADDR 0x4d3132/* registers */33#define DACA_REG_SR 0x0134#define DACA_REG_AVOL 0x0235#define DACA_REG_GCFG 0x033637/* maximum volume value */38#define DACA_VOL_MAX 0x38394041struct pmac_daca {42 struct pmac_keywest i2c;43 int left_vol, right_vol;44 unsigned int deemphasis : 1;45 unsigned int amp_on : 1;46};474849/*50 * initialize / detect DACA51 */52static int daca_init_client(struct pmac_keywest *i2c)53{54 unsigned short wdata = 0x00;55 /* SR: no swap, 1bit delay, 32-48kHz */56 /* GCFG: power amp inverted, DAC on */57 if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 ||58 i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0)59 return -EINVAL;60 return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,61 2, (unsigned char*)&wdata);62}6364/*65 * update volume66 */67static int daca_set_volume(struct pmac_daca *mix)68{69 unsigned char data[2];7071 if (! mix->i2c.client)72 return -ENODEV;7374 if (mix->left_vol > DACA_VOL_MAX)75 data[0] = DACA_VOL_MAX;76 else77 data[0] = mix->left_vol;78 if (mix->right_vol > DACA_VOL_MAX)79 data[1] = DACA_VOL_MAX;80 else81 data[1] = mix->right_vol;82 data[1] |= mix->deemphasis ? 0x40 : 0;83 if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,84 2, data) < 0) {85 snd_printk("failed to set volume \n");86 return -EINVAL;87 }88 return 0;89}909192/* deemphasis switch */93#define daca_info_deemphasis snd_ctl_boolean_mono_info9495static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,96 struct snd_ctl_elem_value *ucontrol)97{98 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);99 struct pmac_daca *mix;100 if (! (mix = chip->mixer_data))101 return -ENODEV;102 ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;103 return 0;104}105106static int daca_put_deemphasis(struct snd_kcontrol *kcontrol,107 struct snd_ctl_elem_value *ucontrol)108{109 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);110 struct pmac_daca *mix;111 int change;112113 if (! (mix = chip->mixer_data))114 return -ENODEV;115 change = mix->deemphasis != ucontrol->value.integer.value[0];116 if (change) {117 mix->deemphasis = !!ucontrol->value.integer.value[0];118 daca_set_volume(mix);119 }120 return change;121}122123/* output volume */124static int daca_info_volume(struct snd_kcontrol *kcontrol,125 struct snd_ctl_elem_info *uinfo)126{127 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;128 uinfo->count = 2;129 uinfo->value.integer.min = 0;130 uinfo->value.integer.max = DACA_VOL_MAX;131 return 0;132}133134static int daca_get_volume(struct snd_kcontrol *kcontrol,135 struct snd_ctl_elem_value *ucontrol)136{137 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);138 struct pmac_daca *mix;139 if (! (mix = chip->mixer_data))140 return -ENODEV;141 ucontrol->value.integer.value[0] = mix->left_vol;142 ucontrol->value.integer.value[1] = mix->right_vol;143 return 0;144}145146static int daca_put_volume(struct snd_kcontrol *kcontrol,147 struct snd_ctl_elem_value *ucontrol)148{149 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);150 struct pmac_daca *mix;151 unsigned int vol[2];152 int change;153154 if (! (mix = chip->mixer_data))155 return -ENODEV;156 vol[0] = ucontrol->value.integer.value[0];157 vol[1] = ucontrol->value.integer.value[1];158 if (vol[0] > DACA_VOL_MAX || vol[1] > DACA_VOL_MAX)159 return -EINVAL;160 change = mix->left_vol != vol[0] ||161 mix->right_vol != vol[1];162 if (change) {163 mix->left_vol = vol[0];164 mix->right_vol = vol[1];165 daca_set_volume(mix);166 }167 return change;168}169170/* amplifier switch */171#define daca_info_amp daca_info_deemphasis172173static int daca_get_amp(struct snd_kcontrol *kcontrol,174 struct snd_ctl_elem_value *ucontrol)175{176 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);177 struct pmac_daca *mix;178 if (! (mix = chip->mixer_data))179 return -ENODEV;180 ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;181 return 0;182}183184static int daca_put_amp(struct snd_kcontrol *kcontrol,185 struct snd_ctl_elem_value *ucontrol)186{187 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);188 struct pmac_daca *mix;189 int change;190191 if (! (mix = chip->mixer_data))192 return -ENODEV;193 change = mix->amp_on != ucontrol->value.integer.value[0];194 if (change) {195 mix->amp_on = !!ucontrol->value.integer.value[0];196 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,197 mix->amp_on ? 0x05 : 0x04);198 }199 return change;200}201202static struct snd_kcontrol_new daca_mixers[] = {203 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,204 .name = "Deemphasis Switch",205 .info = daca_info_deemphasis,206 .get = daca_get_deemphasis,207 .put = daca_put_deemphasis208 },209 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,210 .name = "Master Playback Volume",211 .info = daca_info_volume,212 .get = daca_get_volume,213 .put = daca_put_volume214 },215 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,216 .name = "Power Amplifier Switch",217 .info = daca_info_amp,218 .get = daca_get_amp,219 .put = daca_put_amp220 },221};222223224#ifdef CONFIG_PM225static void daca_resume(struct snd_pmac *chip)226{227 struct pmac_daca *mix = chip->mixer_data;228 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);229 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,230 mix->amp_on ? 0x05 : 0x04);231 daca_set_volume(mix);232}233#endif /* CONFIG_PM */234235236static void daca_cleanup(struct snd_pmac *chip)237{238 struct pmac_daca *mix = chip->mixer_data;239 if (! mix)240 return;241 snd_pmac_keywest_cleanup(&mix->i2c);242 kfree(mix);243 chip->mixer_data = NULL;244}245246/* exported */247int __init snd_pmac_daca_init(struct snd_pmac *chip)248{249 int i, err;250 struct pmac_daca *mix;251252#ifdef CONFIG_KMOD253 request_module("i2c-powermac");254#endif /* CONFIG_KMOD */255256 mix = kzalloc(sizeof(*mix), GFP_KERNEL);257 if (! mix)258 return -ENOMEM;259 chip->mixer_data = mix;260 chip->mixer_free = daca_cleanup;261 mix->amp_on = 1; /* default on */262263 mix->i2c.addr = DACA_I2C_ADDR;264 mix->i2c.init_client = daca_init_client;265 mix->i2c.name = "DACA";266 if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)267 return err;268269 /*270 * build mixers271 */272 strcpy(chip->card->mixername, "PowerMac DACA");273274 for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {275 if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0)276 return err;277 }278279#ifdef CONFIG_PM280 chip->resume = daca_resume;281#endif282283 return 0;284}